diff --git a/AGENTS.md b/AGENTS.md
index bdac707..4298762 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -615,30 +615,6 @@ Future sizing will need:
 
 Users must be able to override sizing suggestions.
 
-## Estimate Balance Module (Grobe Leistungsbilanz)
-
-`src/estimate-balance` plus `src/shared/estimate-balance` is a separate module
-for the early-phase power balance by DIN 276 cost group (see
-`docs/estimate-balance.md`). Rules:
-
-- It has its own tables (`estimate_*`) and never writes circuit, board or
-  project-device data; it only reads device rows for the comparison.
-- Writes use the project command mechanism (`estimate-balance.insert/.update/
-  .delete` with complete documents), so revision checks and Undo/Redo apply.
-- The calculation and comparison live in the import-free
-  `src/shared/estimate-balance/estimate-balance.ts` and are shared by API and UI;
-  displayed values use `roundEstimateValue`.
-- It is deliberately not part of named/automatic project snapshots or snapshot
-  restore; those operations leave estimate balances unchanged. Portable project
-  transfer format version 2 includes every estimate balance and remaps balance,
-  group and row ids when duplicating a project. Version 1 transfers remain
-  importable and contain no estimate balances.
-- UI: `/projects/:id/grobbilanz` (Stände) and `/grobbilanz/:balanceId` (editor,
-  `src/frontend/estimate-balance/`). The editor autosaves the whole document
-  debounced (one Undo step per save), keeps invalid raw input local, and on a
-  409 reloads only if the balance itself changed; otherwise it re-saves with
-  the new revision. `request()` throws `ApiRequestError` (status, code).
-
 ## Persistence and Migration Rules
 
 - SQLite is the currently supported database.
diff --git a/docs/README.md b/docs/README.md
index 5b4bc13..4f84717 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -16,8 +16,6 @@ ausdrücklich getrennt und dürfen nicht als bereits implementiert verstanden we
   Verteilerübersicht, Verteilerpläne, Büro-Logo
 - [Gebäudestruktur](building-structure.md) – Gebäude → Etagen → Räume,
   Befehle, Snapshot-Schema 7, eigene Seite
-- [Grobe Leistungsbilanz](estimate-balance.md) – LPH 2/3 nach Kostengruppen,
-  Rechnung, Vergleich mit der detaillierten Bilanz
 - [Editor-API](circuit-list-editor-api.md) – unterstützte Circuit-First-Endpunkte
 - [Bekannte Einschränkungen](circuit-list-editor-known-limitations.md) –
   bewusst noch nicht implementierte oder begrenzte Funktionen
diff --git a/docs/circuit-list-editor-api.md b/docs/circuit-list-editor-api.md
index ecbbdd4..156be62 100644
--- a/docs/circuit-list-editor-api.md
+++ b/docs/circuit-list-editor-api.md
@@ -59,14 +59,6 @@ this value for optimistic concurrency checks.
   - clients cannot submit arbitrary `project.restore-state` payloads through
     the generic command endpoint
 
-Grobbilanzen sind bewusst kein Teil dieser logischen Snapshots. Der portable
-Projektexport unter `GET /projects/:projectId/export` verwendet dagegen
-Transferformat 2 und enthält alle Grobbilanzen. Die beiden Importwege
-`POST /projects/:projectId/import` und `POST /projects/import` prüfen ihre
-Prüfsumme; Ersetzen übernimmt die Grobbilanzen atomar und mit Undo/Redo,
-Duplizieren vergibt neue IDs. Transferformat 1 bleibt ohne Grobbilanzen
-importierbar.
-
 The public dispatcher supports the Circuit and CircuitDeviceRow commands
 `circuit.update`, `circuit.insert`, `circuit.delete`,
 `circuit-device-row.update`, `circuit-device-row.insert`,
@@ -222,12 +214,6 @@ A stale `expectedRevision` returns HTTP `409` with
 `PROJECT_REVISION_CONFLICT`. Undo or redo without an eligible stack entry
 returns HTTP `409` with `PROJECT_HISTORY_OPERATION_UNAVAILABLE`.
 
-## Estimate Balance (Grobe Leistungsbilanz)
-
-Separate module under `/projects/:projectId/estimate-balances`; complete
-documents are written through `estimate-balance.insert/.update/.delete` project
-commands. Endpoints, payloads and calculation rules: `docs/estimate-balance.md`.
-
 ## Circuit-First Endpoints
 
 ### Distribution Board Setup
diff --git a/docs/current-architecture.md b/docs/current-architecture.md
index 41fd725..6eeb6e1 100644
--- a/docs/current-architecture.md
+++ b/docs/current-architecture.md
@@ -290,20 +290,15 @@ Projektdaten und erzeugen keine Revisionen. Das Löschen eines Projektgeräts
 erfordert eine Bestätigung mit dessen Namen und verwendet weiterhin den
 bestehenden persistenten Projektbefehl.
 
-`GET /api/projects/:projectId/export` verpackt den vollständigen portablen
-Projektzustand in ein format- und schema-versioniertes JSON-Dokument mit
-SHA-256-Prüfsumme. Transferformat 2 enthält zusätzlich alle Grobbilanzen,
-ohne sie in das logische Snapshot-Schema aufzunehmen; Format 1 bleibt ohne
-Grobbilanzen importierbar. `POST /api/projects/:projectId/import` prüft Format,
-Snapshot-Relationen, Grobbilanzen und Prüfsumme vor jedem Schreibzugriff. Der
-Modus `replace` läuft über `project.restore-state` Version 2 und ersetzt den
-Projektzustand und die Grobbilanzen atomar und dauerhaft rückgängig machbar.
-Normale Snapshot-Restores verwenden weiterhin Version 1 und lassen
-Grobbilanzen unverändert. Der Modus `duplicate` ordnet Projekt-,
+`GET /api/projects/:projectId/export` verpackt denselben vollständigen
+Projektzustand in ein portables, format- und schema-versioniertes JSON-Dokument
+mit SHA-256-Prüfsumme. `POST /api/projects/:projectId/import` prüft Format,
+Snapshot-Relationen und Prüfsumme vor jedem Schreibzugriff. Der Modus `replace`
+läuft über `project.restore-state` und ist dadurch eine atomare, dauerhaft
+rückgängig machbare Projektrevision. Der Modus `duplicate` ordnet Projekt-,
 Struktur-, Gruppen-, Verteilerkomponenten-, Raum-, Stromkreis- und
-Gerätezeilen-UUIDs sowie Schutzgeräte-Referenzen und die IDs aller Grobbilanzen
-vollständig neu zu und legt die Kopie mit Revision `0` in einer Transaktion an.
-Fachliche Verknüpfungen
+Gerätezeilen-UUIDs sowie Schutzgeräte-Referenzen vollständig neu zu und legt
+die Kopie mit Revision `0` in einer Transaktion an. Fachliche Verknüpfungen
 innerhalb des unterstützten Laufzeitmodells bleiben
 erhalten. Die
 Projektübersicht verwendet dafür den separaten Collection-Endpunkt
diff --git a/docs/estimate-balance.md b/docs/estimate-balance.md
deleted file mode 100644
index b8b675b..0000000
--- a/docs/estimate-balance.md
+++ /dev/null
@@ -1,119 +0,0 @@
-# Grobe Leistungsbilanz (LPH 2/3)
-
-Eigenes Modul für die Leistungsbilanz der Vor- und Entwurfsplanung, gegliedert
-nach Kostengruppen (DIN 276, KG 400). Es gibt dort noch keine Verteilungen und
-Stromkreise: Jedes Gewerk trägt unter seiner Kostengruppe Verbraucher als
-Stückzahl mit Einzelleistung oder als Fläche mit W/m² ein. Aufbau und Rechnung
-folgen der bisherigen Excel-Vorlage „Leistungsbilanz – KG400“. Abstimmung:
-Issue #7.
-
-Das Modul ist **nicht** mit der Stromkreisstruktur verknüpft. Es liest die
-Gerätezeilen nur für den Vergleich „geschätzt ↔ detailliert“ und schreibt
-nichts in Stromkreislisten, Verteilungen oder Projektgeräte.
-
-## Aufbau
-
-```
-src/shared/estimate-balance/estimate-balance.ts          Datenform, Rechnung, Vergleich (rein, ohne Imports)
-src/estimate-balance/domain/estimate-balance-command.model.ts   Snapshot-Schema (Zod), Befehle
-src/estimate-balance/domain/estimate-balance-project-command.store.ts   Store-Port
-src/estimate-balance/api/estimate-balance-request.schemas.ts   Request-Schemas
-src/db/schema/estimate-balances.ts                        Tabellen (Migration 0010)
-src/db/repositories/estimate-balance*.ts                  Lesen, Schreiben, Befehls-Store
-src/server/controllers/estimate-balance.controller.ts     API
-src/app/projects/[projectId]/grobbilanz/                  Übersicht der Stände und Editor
-src/frontend/estimate-balance/                            Editor-Komponenten und Helfer
-```
-
-Die gemeinsame Datei unter `src/shared/estimate-balance` hat keine Imports, weil
-das Frontend sie direkt nutzt (Turbopack löst die `.js`-Suffixe der API nicht auf).
-
-## Datenmodell
-
-| Tabelle | Inhalt |
-|---|---|
-| `estimate_balances` | ein **Stand** je Projekt (z. B. Vorplanung, Entwurfsplanung): Name, LPH, Datum, Reserve AV/SV in %, Sortierung |
-| `estimate_groups` | Kostengruppe (`"410"` … `"480"`, `""` für „Allgemein“), Titel, „bearbeitet von“, Sortierung |
-| `estimate_rows` | Versorgung (Auswahl ELT/MSR oder Freitext), Verbraucher/Fläche, Anzahl bzw. Fläche, Einheit (`piece` = St., `area` = m²), Anschluss (fest/Steckdose), Einzelleistung in W bzw. W/m², GLF, cos φ, SV ja/nein, Anmerkung |
-
-Neue Stände entstehen aus der Vorlage KG 400 (410 Sanitär, 420 Wärme, 430 Luft,
-434 Kälte, 440 Starkstrom, 450 Schwachstrom, 460 Förder, 470 Nutzungsspezifisch,
-480 GA, Allgemein; Reserve AV 10 %), leer oder als Kopie eines bestehenden
-Stands mit neuen IDs. Stände bleiben bearbeitbar; ein zusätzlicher Status oder
-eine Bearbeitungssperre ist derzeit nicht vorgesehen.
-
-## Rechnung
-
-- Zeile: P = Anzahl bzw. Fläche × Einzelleistung × GLF, S = P / cos φ.
-- **AV** enthält alle Verbraucher (Normalversorgung). **SV** listet zusätzlich
-  die Zeilen mit „SV = ja“, die auch aus der Sicherheitsstromversorgung versorgt
-  werden müssen. Das ist die Lesart der Vorlage; die Regel liegt in
-  `calculateEstimateRow` und lässt sich dort zentral ändern.
-- Summen je Kostengruppe, Gesamtsumme, Reserve in % (AV und SV getrennt),
-  Leistung inklusive Reserve und Maximalstrom I = S / (√3 · U) mit der
-  Drehstromspannung aus den Projekteinstellungen.
-- Anzeige wie in der Tabellenkalkulation gerundet (`roundEstimateValue`,
-  40,175 → 40,18). Der Test `tests/estimate-balance.test.ts` rechnet das
-  Beispiel der Vorlage vollständig nach (143,24 kW, 148,48 kVA, mit 10 %
-  Reserve 157,56 kW / 163,33 kVA, 235,75 A).
-
-## Vergleich geschätzt ↔ detailliert
-
-`GET …/comparison` summiert alle Gerätezeilen aller Stromkreislisten des
-Projekts (Anzahl × Leistung je Stück × Geräte-GZF, wie der Stromkreisbaum) und
-ordnet sie über das Feld **Kostengruppe** der Gerätezeile zu. Maßgeblich ist das
-längste passende Präfix: `434` → Gruppe 434, `431` → Gruppe 430, `444` → 440.
-Zeilen ohne passende Kostengruppe erscheinen als „nicht zugeordnet“. Der
-Verteiler-GZF wird auf keiner Seite angewendet; ein fehlendes cos φ zählt als 1.
-Verglichen wird die AV-Leistung (kW) mit Differenz absolut und in %.
-
-## Befehle, Undo/Redo
-
-Alle Änderungen laufen über den bestehenden Projekt-Befehlsmechanismus mit
-Revision, Inverse und persistentem Undo/Redo:
-
-- `estimate-balance.insert` / `estimate-balance.delete` mit dem vollständigen
-  Stand (Gruppen und Zeilen)
-- `estimate-balance.update` mit vollständigem `expected`/`target`-Dokument; der
-  Store prüft, dass der gespeicherte Stand genau `expected` entspricht, und
-  ersetzt ihn atomar. Die Inverse ist das vertauschte Paar.
-
-Der Editor speichert das ganze Dokument verzögert (Autosave); jeder
-Speichervorgang ist ein Undo-Schritt. Unveränderte Dokumente erzeugen keine
-Revision (`{ unchanged: true }`).
-
-## Projekttransfer und bewusste Abgrenzung
-
-- Das reguläre SQLite-Datenbank-Backup sichert die Grobbilanz-Tabellen zusammen
-  mit allen übrigen Anwendungsdaten.
-- Benannte und automatische Projektsnapshots enthalten keine Grobbilanzen; das
-  Snapshot-Schema bleibt Version 7. Snapshot-Restore und dessen Undo/Redo lassen
-  vorhandene Grobbilanzen unverändert.
-- Der portable Projektexport enthält alle Grobbilanzen ab Transferformat 2.
-  Ersetzen übernimmt sie atomar und rückgängig machbar; Duplizieren vergibt neue
-  IDs für Bilanz, Gruppen und Zeilen. Alte Transferdateien in Version 1 bleiben
-  importierbar und enthalten definitionsgemäß keine Grobbilanzen.
-- Keine Rechte je Gewerk; „bearbeitet von“ ist ein Freitext je Kostengruppe.
-- Kostengruppen der Gerätezeilen sind nicht normiert; der Vergleich arbeitet
-  mit Präfixen.
-- Der erste Vergleich zeigt die geschätzte und detaillierte AV-Wirkleistung in
-  kW. SV- und kVA-Vergleiche können später ergänzt werden.
-- Eine Stromkreisnummer gehört nicht zur Grobbilanz, weil sie eine frühe
-  Abschätzung ohne Stromkreisplanung ist.
-
-## API
-
-- `GET /api/projects/:projectId/estimate-balances`
-- `POST /api/projects/:projectId/estimate-balances` –
-  `{ "expectedRevision": 7, "name": "Entwurfsplanung", "workStage": "LPH 3", "dateIso": "2026-09-26", "template": "kg400" }`
-  (`template`: `kg400` | `empty` | `copy` mit `copyFromBalanceId`)
-- `GET /api/projects/:projectId/estimate-balances/:balanceId`
-- `PUT /api/projects/:projectId/estimate-balances/:balanceId` –
-  `{ "expectedRevision": 8, "balance": { …vollständiges Dokument… } }`
-- `DELETE /api/projects/:projectId/estimate-balances/:balanceId` – `{ "expectedRevision": 9 }`
-- `GET /api/projects/:projectId/estimate-balances/:balanceId/comparison`
-
-Validierung: Name 1–200 Zeichen, getrimmte Texte, Anzahl/Fläche und
-Einzelleistung ≥ 0, GLF 0–1, cos φ > 0 bis 1, Reserve 0–100 %, Datum
-`YYYY-MM-DD`, eindeutige Gruppen- und Zeilen-IDs, unbekannte Felder werden
-abgelehnt.
diff --git a/scripts/db-verify-circuit-schema.js b/scripts/db-verify-circuit-schema.js
index fa91cc4..947767a 100644
--- a/scripts/db-verify-circuit-schema.js
+++ b/scripts/db-verify-circuit-schema.js
@@ -6,9 +6,6 @@ const db = new Database(dbPath, { readonly: true });
 
 const requiredTables = [
   "buildings",
-  "estimate_balances",
-  "estimate_groups",
-  "estimate_rows",
   "circuit_sections",
   "circuits",
   "circuit_device_rows",
diff --git a/src/app/globals.css b/src/app/globals.css
index e5474b8..d5f9f4a 100644
--- a/src/app/globals.css
+++ b/src/app/globals.css
@@ -2002,710 +2002,3 @@ button.structure-entry-main:focus-visible {
   color: var(--color-ink-soft);
   font-size: 0.9rem;
 }
-
-/* ── Grobe Leistungsbilanz ──────────────────────────────────────────── */
-/* Tabelle im Stil der Büro-Vorlage „Leistungsbilanz – KG400“: kompakte
-   Zellen-Inputs statt Bootstrap-Formularfelder, Druck als A4 quer. */
-
-.estimate-toolbar {
-  display: flex;
-  align-items: center;
-  flex-wrap: wrap;
-  gap: var(--space-sm);
-}
-
-.estimate-save-status {
-  display: inline-flex;
-  align-items: center;
-  flex-wrap: wrap;
-  gap: var(--space-sm);
-  font-size: 0.8rem;
-}
-
-.estimate-save-badge {
-  display: inline-block;
-  padding: 0.2rem 0.55rem;
-  border-radius: 999px;
-  font-weight: 600;
-  border: 1px solid var(--color-border);
-  color: var(--color-ink-soft);
-  background: var(--color-bg);
-}
-
-.estimate-save-badge.is-saved {
-  color: var(--color-signal-dark);
-  border-color: var(--color-signal);
-}
-
-.estimate-save-badge.is-busy {
-  color: var(--color-warn);
-  border-color: var(--color-warn);
-}
-
-.estimate-save-badge.is-error {
-  color: var(--color-danger);
-  border-color: var(--color-danger);
-  background: var(--color-danger-bg);
-}
-
-.estimate-save-hint {
-  color: var(--color-danger);
-}
-
-.estimate-header-fields {
-  display: flex;
-  flex-wrap: wrap;
-  gap: var(--space-sm) var(--space-lg);
-  margin-bottom: var(--space-md);
-}
-
-.estimate-header-field {
-  display: flex;
-  align-items: center;
-  gap: var(--space-sm);
-  min-width: 10rem;
-}
-
-.estimate-header-field.is-wide {
-  flex: 1 1 18rem;
-}
-
-.estimate-header-label {
-  font-size: 0.7rem;
-  letter-spacing: 0.06em;
-  text-transform: uppercase;
-  font-weight: 600;
-  color: var(--color-ink-soft);
-}
-
-.estimate-header-value {
-  font-weight: 600;
-}
-
-.estimate-header-input {
-  font-size: 0.95rem;
-  font-weight: 600;
-  border-color: var(--panel-border);
-}
-
-.estimate-sheet-wrap {
-  overflow-x: auto;
-}
-
-.estimate-sheet {
-  width: 100%;
-  min-width: 1400px;
-  table-layout: fixed;
-  border-collapse: collapse;
-  font-size: 0.82rem;
-  background: var(--panel-bg);
-  color: var(--text-strong);
-}
-
-.estimate-comparison {
-  min-width: 640px;
-  table-layout: auto;
-}
-
-.estimate-sheet th,
-.estimate-sheet td {
-  border: 1px solid var(--panel-border);
-  padding: 2px 4px;
-  vertical-align: middle;
-}
-
-.estimate-sheet thead th {
-  background: var(--surface-header-row);
-  font-size: 0.72rem;
-  font-weight: 700;
-  text-align: center;
-  line-height: 1.2;
-}
-
-.estimate-th-hint {
-  display: block;
-  font-size: 0.68rem;
-  font-weight: 400;
-  color: var(--text-faint);
-}
-
-.estimate-col-kg { width: 3rem; }
-.estimate-col-supply { width: 4rem; }
-.estimate-col-name { width: auto; }
-.estimate-col-quantity { width: 4.8rem; }
-.estimate-col-unit { width: 3.8rem; }
-.estimate-col-connection { width: 5rem; }
-.estimate-col-power { width: 6.4rem; }
-.estimate-col-gzf { width: 6.8rem; }
-.estimate-col-cosphi { width: 3.8rem; }
-.estimate-col-result { width: 4.6rem; }
-.estimate-col-sv { width: 3.2rem; }
-.estimate-col-remark { width: 9rem; }
-.estimate-col-actions { width: 2.4rem; }
-
-.estimate-cell-input,
-.estimate-cell-select {
-  width: 100%;
-  min-width: 0;
-  border: 1px solid transparent;
-  border-radius: 3px;
-  background: transparent;
-  color: inherit;
-  font: inherit;
-  padding: 1px 4px;
-  line-height: 1.4;
-}
-
-.estimate-cell-select {
-  padding-right: 0;
-  cursor: pointer;
-}
-
-.estimate-cell-input:hover:not(:disabled),
-.estimate-cell-select:hover:not(:disabled) {
-  border-color: var(--panel-border-strong);
-}
-
-.estimate-cell-input:focus,
-.estimate-cell-select:focus {
-  outline: none;
-  border-color: var(--accent-blue);
-  background: var(--panel-bg);
-  box-shadow: 0 0 0 2px var(--accent-blue-soft-bg);
-}
-
-.estimate-cell-input.is-numeric {
-  text-align: right;
-  font-variant-numeric: tabular-nums;
-}
-
-.estimate-cell-input.is-invalid,
-.estimate-cell-input.is-invalid:focus,
-.estimate-cell-input.is-invalid:hover {
-  border-color: var(--color-danger);
-  background: var(--color-danger-bg);
-}
-
-.estimate-cell-input::placeholder {
-  color: var(--text-faint);
-  opacity: 0.7;
-}
-
-.estimate-unit-input,
-.estimate-gzf-input {
-  display: flex;
-  align-items: center;
-  gap: 2px;
-}
-
-.estimate-unit-label {
-  flex: 0 0 auto;
-  font-size: 0.7rem;
-  color: var(--text-faint);
-  min-width: 1.9rem;
-}
-
-.estimate-amev-button {
-  flex: 0 0 auto;
-  border: 1px solid var(--panel-border-strong);
-  border-radius: 3px;
-  background: var(--panel-bg-subtle);
-  color: var(--text-subtle);
-  font-size: 0.6rem;
-  font-weight: 700;
-  letter-spacing: 0.03em;
-  padding: 1px 3px;
-  line-height: 1.3;
-}
-
-.estimate-amev-button:hover:not(:disabled) {
-  border-color: var(--accent-blue);
-  color: var(--accent-blue);
-}
-
-.estimate-number {
-  text-align: right;
-  font-variant-numeric: tabular-nums;
-  white-space: nowrap;
-}
-
-.estimate-number.is-muted {
-  color: var(--text-faint);
-}
-
-.estimate-number.is-over {
-  color: var(--color-attention-dark);
-}
-
-.estimate-number.is-under {
-  color: var(--color-signal-dark);
-}
-
-.estimate-center {
-  text-align: center;
-}
-
-.estimate-cost-group-cell {
-  font-weight: 700;
-  text-align: center;
-  font-variant-numeric: tabular-nums;
-}
-
-.estimate-group-title-row td {
-  background: var(--surface-component-header);
-  font-weight: 700;
-}
-
-.estimate-group-title {
-  display: flex;
-  align-items: center;
-  flex-wrap: wrap;
-  gap: var(--space-xs) var(--space-lg);
-}
-
-.estimate-group-name {
-  font-size: 0.9rem;
-}
-
-.estimate-group-editor {
-  display: inline-flex;
-  align-items: center;
-  gap: var(--space-xs);
-  font-weight: 400;
-  font-size: 0.75rem;
-  color: var(--text-muted);
-}
-
-.estimate-group-editor .estimate-cell-input {
-  width: 12rem;
-}
-
-.estimate-group-actions {
-  display: flex;
-  justify-content: flex-end;
-  gap: 2px;
-}
-
-.estimate-group-title-row .estimate-actions-cell {
-  width: auto;
-  white-space: nowrap;
-}
-
-.estimate-icon-button {
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  padding: 0.15rem 0.3rem;
-  line-height: 1;
-}
-
-.estimate-actions-cell {
-  text-align: center;
-}
-
-.estimate-empty-row td {
-  color: var(--text-faint);
-  font-style: italic;
-}
-
-.estimate-subtotal-row td {
-  background: var(--panel-bg-subtle);
-  font-weight: 700;
-}
-
-.estimate-total-label {
-  text-align: right;
-  font-weight: 700;
-}
-
-.estimate-total-hint {
-  font-weight: 400;
-  color: var(--text-faint);
-}
-
-.estimate-total-row td {
-  background: var(--surface-header-row);
-  font-weight: 600;
-}
-
-.estimate-total-row.is-strong td {
-  font-weight: 800;
-  border-top: 2px solid var(--panel-border-strong);
-}
-
-.estimate-add-group-row td {
-  background: var(--panel-bg);
-  padding: var(--space-sm) 4px;
-}
-
-.estimate-unassigned-row td {
-  font-style: italic;
-  color: var(--text-muted);
-}
-
-.estimate-collapse-toggle {
-  display: inline-flex;
-  align-items: center;
-  gap: var(--space-xs);
-  border: 0;
-  background: transparent;
-  color: inherit;
-  font: inherit;
-  font-weight: 700;
-  padding: 0;
-}
-
-.estimate-list-table .estimate-number {
-  font-variant-numeric: tabular-nums;
-}
-
-/* Druck-Textwerte: auf dem Bildschirm unsichtbar, im Druck statt Inputs */
-.estimate-print-value {
-  display: none;
-}
-
-/* Ausrichtung: alle Zellen zentriert, nur „Verbraucher / Flächen“, die
-   Gruppentitel und die Summenbeschriftungen stehen links bzw. rechts. */
-.estimate-sheet td,
-.estimate-sheet td.estimate-number,
-.estimate-sheet .estimate-cell-input,
-.estimate-sheet .estimate-cell-input.is-numeric {
-  text-align: center;
-}
-
-.estimate-sheet .estimate-cell-select {
-  text-align: center;
-  text-align-last: center;
-}
-
-.estimate-sheet .estimate-unit-input,
-.estimate-sheet .estimate-gzf-input {
-  justify-content: center;
-}
-
-.estimate-sheet td.estimate-name-cell,
-.estimate-sheet td.estimate-name-cell .estimate-cell-input,
-.estimate-sheet .estimate-group-title-row td:not(.estimate-cost-group-cell),
-.estimate-comparison td:nth-child(2) {
-  text-align: left;
-}
-
-.estimate-sheet td.estimate-total-label {
-  text-align: right;
-}
-
-/* Druck im kbp-CD der Seitenansicht (src/frontend/print/print-document.css):
-   gleiche Farben, Schrift, Titelblock und Fußzeile. Die Fußzeile mit
-   Seitenzahlen setzt EstimatePrintHeader als @page-Regel mit Projektdaten. */
-.estimate-print-titleblock {
-  display: none;
-}
-
-@page estimate-balance {
-  size: A4 landscape;
-  margin: 10mm 10mm 13mm;
-}
-
-@media print {
-  body:has(.estimate-print-root) .sidebar,
-  .estimate-print-root .estimate-no-print,
-  .estimate-print-root .estimate-page-header,
-  .estimate-print-root .estimate-header-fields,
-  .estimate-print-root .alert,
-  .estimate-print-root input,
-  .estimate-print-root select,
-  .estimate-print-root button {
-    display: none !important;
-  }
-
-  html:has(.estimate-print-root),
-  body:has(.estimate-print-root),
-  body:has(.estimate-print-root) .app-shell,
-  body:has(.estimate-print-root) .app-shell-content {
-    background: #fff !important;
-  }
-
-  /* Der Dunkelmodus setzt color-scheme: dark; Chrome färbt damit auch den
-     Seitenrand dunkel. Im Druck gilt immer das helle Schema. */
-  html:has(.estimate-print-root) {
-    color-scheme: light !important;
-  }
-
-  .estimate-print-root .estimate-group-editor.is-empty {
-    display: none;
-  }
-
-  /* Verbraucher bekommt den Platz; Anmerkungen bleiben schmal. */
-  .estimate-sheet .estimate-col-name {
-    width: 52mm;
-  }
-
-  .estimate-sheet .estimate-col-remark {
-    width: 24mm;
-  }
-
-  .estimate-sheet .estimate-col-supply {
-    width: 13mm;
-  }
-
-  body:has(.estimate-print-root) .app-shell {
-    display: block;
-  }
-
-  .estimate-print-root {
-    --ep-blue: #476088;
-    --ep-lilac: #9198c4;
-    --ep-line: #d6dae5;
-    --ep-tint: #f5f6fa;
-    --ep-text: #2b2b2b;
-    --ep-muted: #6b7280;
-    --ep-accent: #c9782a;
-    page: estimate-balance;
-    padding: 0 !important;
-    max-width: none;
-    color: var(--ep-text);
-    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
-    color-scheme: light;
-  }
-
-  .estimate-print-root * {
-    -webkit-print-color-adjust: exact;
-    print-color-adjust: exact;
-  }
-
-  .estimate-print-root .estimate-print-value {
-    display: inline;
-  }
-
-  /* Titelblock wie der Plankopf der Seitenansicht */
-  .estimate-print-titleblock {
-    display: grid;
-    grid-template-columns: 30mm 1fr auto auto;
-    margin-bottom: 4mm;
-    border: 1.5px solid var(--ep-blue);
-    background: #fff;
-    font-size: 8.5pt;
-    break-inside: avoid;
-  }
-
-  .estimate-print-titleblock > * {
-    padding: 2.5mm 3.5mm;
-    border-left: 1px solid var(--ep-line);
-  }
-
-  .estimate-print-titleblock > :first-child {
-    border-left: none;
-  }
-
-  .estimate-print-logo {
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    min-height: 16mm;
-    color: var(--ep-blue);
-    font-weight: bold;
-    text-align: center;
-  }
-
-  .estimate-print-logo img {
-    max-width: 100%;
-    max-height: 10mm;
-  }
-
-  .estimate-print-kicker {
-    color: var(--ep-muted);
-    font-size: 7pt;
-    letter-spacing: 0.05em;
-    text-transform: uppercase;
-  }
-
-  .estimate-print-heading {
-    display: flex;
-    align-items: baseline;
-    flex-wrap: wrap;
-    gap: 1mm 4mm;
-    margin-top: 1mm;
-  }
-
-  .estimate-print-stand {
-    color: var(--ep-blue);
-    font-size: 16pt;
-    font-weight: bold;
-  }
-
-  .estimate-print-project {
-    font-size: 12pt;
-    font-weight: bold;
-  }
-
-  .estimate-print-meta {
-    display: grid;
-    grid-template-columns: auto auto;
-    gap: 0.8mm 4mm;
-    align-content: center;
-    margin: 0;
-    font-size: 7.5pt;
-  }
-
-  .estimate-print-meta div {
-    display: contents;
-  }
-
-  .estimate-print-meta dt {
-    color: var(--ep-muted);
-    font-weight: normal;
-  }
-
-  .estimate-print-meta dd {
-    margin: 0;
-    font-weight: bold;
-  }
-
-  .estimate-print-meta.is-tinted {
-    background: var(--ep-tint);
-  }
-
-  /* Karten und Ränder der Bildschirmansicht entfallen */
-  .estimate-print-root .card {
-    border: 0;
-    box-shadow: none !important;
-    background: transparent;
-  }
-
-  .estimate-print-root .card-body,
-  .estimate-print-root .card-header {
-    padding: 0;
-    background: transparent;
-    border: 0;
-  }
-
-  .estimate-print-root .estimate-comparison-card {
-    margin-top: 6mm;
-    break-inside: avoid;
-  }
-
-  .estimate-print-root .estimate-comparison-card .card-header {
-    margin-bottom: 2mm;
-    color: var(--ep-blue);
-    font-size: 10pt;
-    font-weight: bold;
-  }
-
-  .estimate-sheet-wrap {
-    overflow: visible;
-  }
-
-  /* Tabelle */
-  .estimate-sheet {
-    min-width: 0;
-    table-layout: auto;
-    font-size: 7.4pt;
-    line-height: 1.2;
-    background: #fff;
-    color: var(--ep-text);
-  }
-
-  .estimate-sheet th,
-  .estimate-sheet td {
-    border: 1px solid var(--ep-line) !important;
-    padding: 0.7mm 1.5mm;
-    background: #fff;
-    color: var(--ep-text);
-  }
-
-  .estimate-sheet thead {
-    display: table-header-group;
-  }
-
-  .estimate-sheet thead th {
-    background: var(--ep-blue) !important;
-    border-color: var(--ep-blue) !important;
-    color: #fff !important;
-    font-weight: bold;
-    vertical-align: bottom;
-  }
-
-  .estimate-sheet thead .estimate-th-hint {
-    color: #dfe3f0 !important;
-  }
-
-  .estimate-group-title-row td {
-    background: var(--ep-tint) !important;
-    border-top: 1.5px solid var(--ep-lilac) !important;
-    font-weight: bold;
-  }
-
-  .estimate-group-title-row .estimate-cost-group-cell {
-    color: var(--ep-blue) !important;
-  }
-
-  .estimate-group-title-row .estimate-group-editor {
-    color: var(--ep-muted);
-    font-weight: normal;
-  }
-
-  .estimate-subtotal-row td {
-    border-bottom: 1.5px solid var(--ep-line) !important;
-    font-weight: bold;
-  }
-
-  .estimate-subtotal-row .estimate-total-label {
-    color: var(--ep-muted);
-  }
-
-  .estimate-total-row td {
-    background: var(--ep-tint) !important;
-    font-weight: bold;
-  }
-
-  .estimate-total-row.is-strong td {
-    background: var(--ep-blue) !important;
-    border-color: var(--ep-blue) !important;
-    color: #fff !important;
-  }
-
-  .estimate-total-row .estimate-total-hint {
-    color: var(--ep-muted);
-    font-weight: normal;
-  }
-
-  .estimate-total-row.is-strong .estimate-total-hint {
-    color: #dfe3f0;
-  }
-
-  .estimate-comparison .is-over {
-    color: var(--ep-accent) !important;
-    font-weight: bold;
-  }
-
-  .estimate-comparison .is-under {
-    color: var(--ep-blue) !important;
-    font-weight: bold;
-  }
-
-  .estimate-group-title-row,
-  .estimate-subtotal-row,
-  .estimate-total-row,
-  .estimate-row {
-    break-inside: avoid;
-  }
-
-  .estimate-group-title-row {
-    break-after: avoid;
-  }
-
-  /* Summen einmal am Ende, nicht auf jeder Seite */
-  .estimate-sheet tfoot {
-    display: table-row-group;
-    break-inside: avoid;
-  }
-
-  .estimate-col-actions {
-    width: 0;
-  }
-
-  .estimate-unit-input,
-  .estimate-gzf-input {
-    justify-content: center;
-  }
-}
diff --git a/src/app/projects/[projectId]/grobbilanz/[balanceId]/page.tsx b/src/app/projects/[projectId]/grobbilanz/[balanceId]/page.tsx
deleted file mode 100644
index 584f5cf..0000000
--- a/src/app/projects/[projectId]/grobbilanz/[balanceId]/page.tsx
+++ /dev/null
@@ -1,745 +0,0 @@
-"use client";
-
-import Link from "next/link";
-import { useParams, useRouter } from "next/navigation";
-import { type MouseEvent, useCallback, useEffect, useRef, useState } from "react";
-import {
-  ArrowLeft,
-  ChevronDown,
-  ChevronRight,
-  Printer,
-  Redo2,
-  RefreshCw,
-  Undo2,
-} from "lucide-react";
-import {
-  ApiRequestError,
-  getEstimateBalance,
-  getEstimateComparison,
-  getProject,
-  getProjectHistory,
-  isRevisionConflictError,
-  redoProjectCommand,
-  undoProjectCommand,
-  updateEstimateBalance,
-} from "../../../../../frontend/utils/api";
-import type {
-  EstimateBalanceDto,
-  EstimateComparisonDto,
-  ProjectDto,
-  ProjectHistoryStateDto,
-} from "../../../../../frontend/types";
-import type { EstimateGroupSnapshot } from "../../../../../shared/estimate-balance/estimate-balance";
-import { GzfPickerModal } from "../../../../../frontend/components/gzf-picker-modal";
-import {
-  addEstimateGroup,
-  estimateBalanceFingerprint,
-  estimateTextLimits,
-  normalizeEstimateSortOrder,
-  toSaveableEstimateBalance,
-  updateEstimateGroup,
-  updateEstimateRow,
-  validateEstimateBalance,
-} from "../../../../../frontend/estimate-balance/estimate-balance-document";
-import { formatIsoDateGerman } from "../../../../../frontend/estimate-balance/estimate-balance-format";
-import {
-  EstimateBalanceSheet,
-  type EstimateBalanceUpdate,
-} from "../../../../../frontend/estimate-balance/estimate-balance-sheet";
-import { EstimateComparisonTable } from "../../../../../frontend/estimate-balance/estimate-comparison-table";
-import { DraftInput } from "../../../../../frontend/estimate-balance/estimate-draft-input";
-import { EstimatePrintHeader } from "../../../../../frontend/estimate-balance/estimate-print-header";
-import {
-  EstimateGroupModal,
-  type EstimateGroupFormValues,
-} from "../../../../../frontend/estimate-balance/estimate-group-modal";
-
-const AUTOSAVE_DELAY_MS = 800;
-const CONFLICT_MESSAGE = "Die Bilanz wurde zwischenzeitlich geändert und neu geladen.";
-
-type SaveStatus = "saved" | "pending" | "saving" | "error" | "invalid";
-
-type GroupDialog = { group: EstimateGroupSnapshot | null };
-
-function errorMessage(error: unknown, fallback: string) {
-  return error instanceof Error && error.message ? error.message : fallback;
-}
-
-function isNotFoundError(error: unknown) {
-  return error instanceof ApiRequestError && error.status === 404;
-}
-
-export default function EstimateBalanceEditorPage() {
-  const params = useParams<{ projectId: string; balanceId: string }>();
-  const { projectId, balanceId } = params;
-  const router = useRouter();
-
-  const [project, setProject] = useState<ProjectDto | null>(null);
-  const [draft, setDraft] = useState<EstimateBalanceDto | null>(null);
-  const [history, setHistory] = useState<ProjectHistoryStateDto | null>(null);
-  const [comparison, setComparison] = useState<EstimateComparisonDto | null>(null);
-  const [comparisonError, setComparisonError] = useState<string | null>(null);
-  const [isComparisonOpen, setIsComparisonOpen] = useState(false);
-  const [saveStatus, setSaveStatus] = useState<SaveStatus>("saved");
-  const [saveError, setSaveError] = useState<string | null>(null);
-  const [error, setError] = useState<string | null>(null);
-  const [notice, setNotice] = useState<string | null>(null);
-  const [isLoading, setIsLoading] = useState(true);
-  const [isMissing, setIsMissing] = useState(false);
-  const [isHistoryBusy, setIsHistoryBusy] = useState(false);
-  const [invalidFieldKeys, setInvalidFieldKeys] = useState<ReadonlySet<string>>(
-    () => new Set()
-  );
-  const [groupDialog, setGroupDialog] = useState<GroupDialog | null>(null);
-  const [gzfTarget, setGzfTarget] = useState<{ groupId: string; rowId: string } | null>(
-    null
-  );
-
-  // Refs carry the latest values into timers, unload handlers and chained
-  // async saves without re-creating them.
-  const draftRef = useRef<EstimateBalanceDto | null>(null);
-  const revisionRef = useRef<number | null>(null);
-  const savedFingerprintRef = useRef<string | null>(null);
-  const saveInFlightRef = useRef<Promise<boolean> | null>(null);
-  const saveTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
-
-  useEffect(() => {
-    draftRef.current = draft;
-  }, [draft]);
-
-  const applyServerBalance = useCallback((balance: EstimateBalanceDto) => {
-    const normalized = normalizeEstimateSortOrder(balance);
-    savedFingerprintRef.current = estimateBalanceFingerprint(normalized);
-    draftRef.current = normalized;
-    setDraft(normalized);
-    setSaveStatus("saved");
-    setSaveError(null);
-  }, []);
-
-  const reloadComparison = useCallback(async () => {
-    try {
-      setComparison(await getEstimateComparison(projectId, balanceId));
-      setComparisonError(null);
-    } catch (err) {
-      setComparisonError(
-        errorMessage(err, "Der Vergleich konnte nicht geladen werden.")
-      );
-    }
-  }, [balanceId, projectId]);
-
-  /** Reloads project, document and history; replaces the local draft. */
-  const reloadAll = useCallback(async () => {
-    const balanceRequest = getEstimateBalance(projectId, balanceId);
-    // Handled below; avoids an "unhandled rejection" while project/history load.
-    balanceRequest.catch(() => undefined);
-    // Project and history are applied even when the balance is missing, so
-    // Redo stays available after its creation was undone.
-    const [currentProject, currentHistory] = await Promise.all([
-      getProject(projectId),
-      getProjectHistory(projectId).catch(() => null),
-    ]);
-    setProject(currentProject);
-    revisionRef.current = currentHistory?.currentRevision ?? currentProject.currentRevision;
-    setHistory(currentHistory);
-    const balance = await balanceRequest;
-    applyServerBalance(balance);
-    setIsMissing(false);
-    void reloadComparison();
-  }, [applyServerBalance, balanceId, projectId, reloadComparison]);
-
-  const handleReloadError = useCallback((err: unknown) => {
-    if (isNotFoundError(err)) {
-      setIsMissing(true);
-      setDraft(null);
-      draftRef.current = null;
-      return;
-    }
-    setError(errorMessage(err, "Die grobe Leistungsbilanz konnte nicht geladen werden."));
-  }, []);
-
-  useEffect(() => {
-    if (!projectId || !balanceId) {
-      return;
-    }
-    setIsLoading(true);
-    reloadAll()
-      .then(() => setError(null))
-      .catch(handleReloadError)
-      .finally(() => setIsLoading(false));
-  }, [balanceId, handleReloadError, projectId, reloadAll]);
-
-  const clearSaveTimer = useCallback(() => {
-    if (saveTimerRef.current) {
-      clearTimeout(saveTimerRef.current);
-      saveTimerRef.current = null;
-    }
-  }, []);
-
-  /**
-   * Saves the current draft if it differs from the last saved state. Saves
-   * never overlap: a save requested while another runs waits for it and then
-   * saves whatever changed in the meantime. Resolves to false when the draft
-   * could not be saved.
-   */
-  const saveNow = useCallback(async (): Promise<boolean> => {
-    clearSaveTimer();
-    while (saveInFlightRef.current) {
-      await saveInFlightRef.current;
-    }
-    const current = draftRef.current;
-    const revision = revisionRef.current;
-    if (!current || revision === null) {
-      return true;
-    }
-    const fingerprint = estimateBalanceFingerprint(current);
-    if (fingerprint === savedFingerprintRef.current) {
-      setSaveStatus("saved");
-      return true;
-    }
-    const problems = validateEstimateBalance(current);
-    if (problems.length) {
-      setSaveStatus("invalid");
-      setSaveError(problems.join(" "));
-      return false;
-    }
-    const body = toSaveableEstimateBalance(current);
-
-    /**
-     * Another command changed the project revision. When this document is
-     * still unchanged on the server (e.g. an edit in a circuit list), the
-     * draft is kept and saved again; otherwise the server state wins.
-     */
-    async function resolveConflict(): Promise<"retry" | "reloaded"> {
-      const [currentProject, serverBalance, currentHistory] = await Promise.all([
-        getProject(projectId),
-        getEstimateBalance(projectId, balanceId),
-        getProjectHistory(projectId).catch(() => null),
-      ]);
-      setProject(currentProject);
-      setHistory(currentHistory);
-      revisionRef.current = currentHistory?.currentRevision ?? currentProject.currentRevision;
-      if (estimateBalanceFingerprint(serverBalance) === savedFingerprintRef.current) {
-        return "retry";
-      }
-      applyServerBalance(serverBalance);
-      setNotice(CONFLICT_MESSAGE);
-      void reloadComparison();
-      return "reloaded";
-    }
-
-    const run = (async () => {
-      setSaveStatus("saving");
-      for (let attempt = 0; ; attempt += 1) {
-        try {
-          const result = await updateEstimateBalance(
-            projectId,
-            body,
-            attempt === 0 ? revision : revisionRef.current ?? revision
-          );
-          if (!("unchanged" in result)) {
-            revisionRef.current = result.history.currentRevision;
-            setHistory(result.history);
-            setProject((currentProject) =>
-              currentProject
-                ? { ...currentProject, currentRevision: result.history.currentRevision }
-                : currentProject
-            );
-          }
-          // The sent document is the saved state; the local draft is kept so
-          // typing is never interrupted by the server's copy.
-          savedFingerprintRef.current = fingerprint;
-          setSaveError(null);
-          const latest = draftRef.current;
-          if (latest && estimateBalanceFingerprint(latest) !== fingerprint) {
-            setSaveStatus("pending");
-          } else {
-            setSaveStatus("saved");
-          }
-          void reloadComparison();
-          return true;
-        } catch (err) {
-          if (isRevisionConflictError(err)) {
-            try {
-              if (attempt === 0 && (await resolveConflict()) === "retry") {
-                continue;
-              }
-              if (attempt > 0) {
-                await reloadAll();
-                setNotice(CONFLICT_MESSAGE);
-              }
-            } catch (reloadError) {
-              handleReloadError(reloadError);
-            }
-            return false;
-          }
-          if (isNotFoundError(err)) {
-            handleReloadError(err);
-            return false;
-          }
-          setSaveStatus("error");
-          setSaveError(errorMessage(err, "Die Änderungen konnten nicht gespeichert werden."));
-          return false;
-        }
-      }
-    })();
-    saveInFlightRef.current = run;
-    try {
-      return await run;
-    } finally {
-      saveInFlightRef.current = null;
-    }
-  }, [
-    applyServerBalance,
-    balanceId,
-    clearSaveTimer,
-    handleReloadError,
-    projectId,
-    reloadAll,
-    reloadComparison,
-  ]);
-
-  // Debounced autosave after every change of the draft.
-  useEffect(() => {
-    if (!draft) {
-      return;
-    }
-    if (estimateBalanceFingerprint(draft) === savedFingerprintRef.current) {
-      return;
-    }
-    setSaveStatus((status) => (status === "saving" ? status : "pending"));
-    clearSaveTimer();
-    saveTimerRef.current = setTimeout(() => {
-      saveTimerRef.current = null;
-      void saveNow();
-    }, AUTOSAVE_DELAY_MS);
-    return clearSaveTimer;
-  }, [clearSaveTimer, draft, saveNow]);
-
-  // Save immediately when the tab is hidden; on unload/unmount send the last
-  // change with keepalive so it survives the page.
-  useEffect(() => {
-    function hasUnsavedDraft() {
-      const current = draftRef.current;
-      return Boolean(
-        current && estimateBalanceFingerprint(current) !== savedFingerprintRef.current
-      );
-    }
-    function sendKeepalive(): boolean {
-      const current = draftRef.current;
-      const revision = revisionRef.current;
-      if (
-        !current ||
-        revision === null ||
-        saveInFlightRef.current ||
-        validateEstimateBalance(current).length
-      ) {
-        return false;
-      }
-      savedFingerprintRef.current = estimateBalanceFingerprint(current);
-      void updateEstimateBalance(projectId, toSaveableEstimateBalance(current), revision, {
-        keepalive: true,
-      }).catch(() => undefined);
-      return true;
-    }
-    function handleVisibilityChange() {
-      if (document.visibilityState === "hidden" && hasUnsavedDraft()) {
-        void saveNow();
-      }
-    }
-    function handleBeforeUnload(event: BeforeUnloadEvent) {
-      if (!hasUnsavedDraft() || sendKeepalive()) {
-        return;
-      }
-      // A save is still running or the draft is invalid: let the browser ask.
-      event.preventDefault();
-      event.returnValue = "";
-    }
-    document.addEventListener("visibilitychange", handleVisibilityChange);
-    window.addEventListener("beforeunload", handleBeforeUnload);
-    return () => {
-      document.removeEventListener("visibilitychange", handleVisibilityChange);
-      window.removeEventListener("beforeunload", handleBeforeUnload);
-      // In-app navigation (e.g. sidebar) unmounts the editor.
-      if (hasUnsavedDraft()) {
-        sendKeepalive();
-      }
-    };
-  }, [projectId, saveNow]);
-
-  const handleChange: EstimateBalanceUpdate = useCallback((update) => {
-    setNotice(null);
-    setDraft((current) => (current ? update(current) : current));
-  }, []);
-
-  const handleValidityChange = useCallback((fieldKey: string, isValid: boolean) => {
-    setInvalidFieldKeys((current) => {
-      if (isValid ? !current.has(fieldKey) : current.has(fieldKey)) {
-        return current;
-      }
-      const next = new Set(current);
-      if (isValid) {
-        next.delete(fieldKey);
-      } else {
-        next.add(fieldKey);
-      }
-      return next;
-    });
-  }, []);
-
-  async function handleHistory(direction: "undo" | "redo") {
-    setError(null);
-    setNotice(null);
-    setIsHistoryBusy(true);
-    try {
-      // Pending edits are saved first so they become their own undo step.
-      await saveNow();
-      const revision = revisionRef.current;
-      if (revision === null) {
-        return;
-      }
-      const result =
-        direction === "undo"
-          ? await undoProjectCommand(projectId, revision)
-          : await redoProjectCommand(projectId, revision);
-      revisionRef.current = result.history.currentRevision;
-      setHistory(result.history);
-      await reloadAll();
-    } catch (err) {
-      if (isRevisionConflictError(err)) {
-        await reloadAll().catch(handleReloadError);
-        setNotice(CONFLICT_MESSAGE);
-      } else if (isNotFoundError(err)) {
-        handleReloadError(err);
-      } else {
-        setError(
-          errorMessage(
-            err,
-            direction === "undo"
-              ? "Die letzte Änderung konnte nicht rückgängig gemacht werden."
-              : "Die letzte Änderung konnte nicht wiederholt werden."
-          )
-        );
-      }
-    } finally {
-      setIsHistoryBusy(false);
-    }
-  }
-
-  async function handleBackClick(event: MouseEvent<HTMLAnchorElement>) {
-    const current = draftRef.current;
-    if (!current || estimateBalanceFingerprint(current) === savedFingerprintRef.current) {
-      return;
-    }
-    event.preventDefault();
-    await saveNow();
-    router.push(`/projects/${projectId}/grobbilanz`);
-  }
-
-  function handleSaveGroup(values: EstimateGroupFormValues) {
-    const editingGroup = groupDialog?.group ?? null;
-    handleChange((current) =>
-      editingGroup
-        ? updateEstimateGroup(current, editingGroup.id, values)
-        : addEstimateGroup(current, values).balance
-    );
-    setGroupDialog(null);
-  }
-
-  function handleSelectGzf(value: number) {
-    if (gzfTarget) {
-      handleChange((current) =>
-        updateEstimateRow(current, gzfTarget.groupId, gzfTarget.rowId, {
-          simultaneityFactor: value,
-        })
-      );
-    }
-    setGzfTarget(null);
-  }
-
-  const isEditingDisabled = !draft || isHistoryBusy;
-  const invalidCount = invalidFieldKeys.size;
-  const listHref = `/projects/${projectId}/grobbilanz`;
-
-  return (
-    <main className="container-fluid py-4 estimate-print-root">
-      {project && draft ? <EstimatePrintHeader balance={draft} project={project} /> : null}
-      <div className="page-header estimate-page-header">
-        <div className="d-flex align-items-start gap-3">
-          <Link
-            aria-label="Zurück zur Übersicht der Stände"
-            className="btn btn-outline-secondary btn-sm structure-back-link estimate-no-print"
-            href={listHref}
-            onClick={(event) => void handleBackClick(event)}
-            title="Zurück zur Übersicht der Stände"
-          >
-            <ArrowLeft aria-hidden="true" size={18} />
-          </Link>
-          <div>
-            <div className="kicker">{project?.name ?? "Projekt"}</div>
-            <h1>Grobe Leistungsbilanz{draft ? ` – ${draft.name}` : ""}</h1>
-            <p className="text-secondary mb-0 estimate-no-print">
-              Leistungsabschätzung nach Kostengruppen (DIN 276) für LPH 2/3.
-            </p>
-          </div>
-        </div>
-        <div className="estimate-toolbar estimate-no-print">
-          <SaveStatusBadge
-            error={saveError}
-            invalidCount={invalidCount}
-            onRetry={() => void saveNow()}
-            status={saveStatus}
-          />
-          <div className="btn-group btn-group-sm" role="group" aria-label="Verlauf">
-            <button
-              aria-label="Rückgängig"
-              className="btn btn-outline-secondary"
-              disabled={isHistoryBusy || !history || history.undoDepth === 0}
-              onClick={() => void handleHistory("undo")}
-              title="Rückgängig (letzte Änderung im Projekt)"
-              type="button"
-            >
-              <Undo2 aria-hidden="true" size={16} />
-            </button>
-            <button
-              aria-label="Wiederholen"
-              className="btn btn-outline-secondary"
-              disabled={isHistoryBusy || !history || history.redoDepth === 0}
-              onClick={() => void handleHistory("redo")}
-              title="Wiederholen (im Projekt)"
-              type="button"
-            >
-              <Redo2 aria-hidden="true" size={16} />
-            </button>
-          </div>
-          <button
-            aria-label="Drucken"
-            className="btn btn-sm btn-outline-secondary"
-            disabled={!draft}
-            onClick={() => window.print()}
-            title="Drucken"
-            type="button"
-          >
-            <Printer aria-hidden="true" className="me-1" size={16} />
-            Drucken
-          </button>
-        </div>
-      </div>
-
-      {notice ? (
-        <div className="alert alert-info estimate-no-print" role="status">
-          {notice}
-        </div>
-      ) : null}
-      {error ? (
-        <div className="alert alert-warning estimate-no-print" role="alert">
-          {error}
-        </div>
-      ) : null}
-      {isLoading ? (
-        <p className="text-secondary" role="status">
-          Grobe Leistungsbilanz wird geladen …
-        </p>
-      ) : null}
-      {isMissing ? (
-        <div className="alert alert-warning" role="alert">
-          Dieser Stand existiert nicht (mehr), z. B. weil er gelöscht oder sein Anlegen
-          rückgängig gemacht wurde.{" "}
-          <Link href={listHref}>Zur Übersicht der Stände</Link>
-        </div>
-      ) : null}
-
-      {draft && project ? (
-        <>
-          <section className="card shadow-sm mb-3 estimate-sheet-card">
-            <div className="card-body">
-              <div className="estimate-header-fields">
-                <div className="estimate-header-field">
-                  <span className="estimate-header-label">Projekt</span>
-                  <span className="estimate-header-value">{project.name}</span>
-                </div>
-                <label className="estimate-header-field is-wide">
-                  <span className="estimate-header-label">Stand</span>
-                  <DraftInput
-                    ariaLabel="Bezeichnung des Stands"
-                    className="estimate-cell-input estimate-header-input"
-                    disabled={isEditingDisabled}
-                    format={(value: string) => value}
-                    maxLength={estimateTextLimits.balanceName}
-                    onCommit={(name) => handleChange((current) => ({ ...current, name }))}
-                    onValidityChange={(isValid) =>
-                      handleValidityChange("balance:name", isValid)
-                    }
-                    parse={(text) =>
-                      text.trim()
-                        ? { ok: true, value: text }
-                        : { ok: false, error: "Die Bezeichnung darf nicht leer sein." }
-                    }
-                    value={draft.name}
-                  />
-                </label>
-                <label className="estimate-header-field">
-                  <span className="estimate-header-label">LPH</span>
-                  <input
-                    aria-label="Leistungsphase"
-                    className="estimate-cell-input estimate-header-input"
-                    disabled={isEditingDisabled}
-                    maxLength={estimateTextLimits.workStage}
-                    onChange={(event) =>
-                      handleChange((current) => ({
-                        ...current,
-                        workStage: event.target.value,
-                      }))
-                    }
-                    placeholder="z. B. LPH 3"
-                    type="text"
-                    value={draft.workStage ?? ""}
-                  />
-                  <span className="estimate-print-value">{draft.workStage ?? ""}</span>
-                </label>
-                <label className="estimate-header-field">
-                  <span className="estimate-header-label">Datum</span>
-                  <input
-                    aria-label="Datum"
-                    className="estimate-cell-input estimate-header-input"
-                    disabled={isEditingDisabled}
-                    onChange={(event) =>
-                      handleChange((current) => ({
-                        ...current,
-                        dateIso: event.target.value || null,
-                      }))
-                    }
-                    type="date"
-                    value={draft.dateIso ?? ""}
-                  />
-                  <span className="estimate-print-value">
-                    {formatIsoDateGerman(draft.dateIso)}
-                  </span>
-                </label>
-              </div>
-              <EstimateBalanceSheet
-                balance={draft}
-                disabled={isEditingDisabled}
-                onAddGroup={() => setGroupDialog({ group: null })}
-                onChange={handleChange}
-                onEditGroup={(group) => setGroupDialog({ group })}
-                onOpenGzfPicker={(groupId, rowId) => setGzfTarget({ groupId, rowId })}
-                onValidityChange={handleValidityChange}
-                threePhaseVoltageV={project.threePhaseVoltageV}
-              />
-            </div>
-          </section>
-
-          <section
-            className={
-              isComparisonOpen
-                ? "card shadow-sm estimate-comparison-card"
-                : "card shadow-sm estimate-comparison-card estimate-no-print"
-            }
-          >
-            <div className="card-header d-flex justify-content-between align-items-center gap-2">
-              <button
-                aria-controls="estimate-comparison-body"
-                aria-expanded={isComparisonOpen}
-                className="estimate-collapse-toggle"
-                onClick={() => setIsComparisonOpen((open) => !open)}
-                type="button"
-              >
-                {isComparisonOpen ? (
-                  <ChevronDown aria-hidden="true" size={16} />
-                ) : (
-                  <ChevronRight aria-hidden="true" size={16} />
-                )}
-                Vergleich mit detaillierter Bilanz
-              </button>
-              {isComparisonOpen ? (
-                <button
-                  aria-label="Vergleich neu laden"
-                  className="btn btn-sm btn-outline-secondary structure-icon-button estimate-no-print"
-                  onClick={() => void reloadComparison()}
-                  title="Vergleich neu laden"
-                  type="button"
-                >
-                  <RefreshCw aria-hidden="true" size={14} />
-                </button>
-              ) : null}
-            </div>
-            {isComparisonOpen ? (
-              <div className="card-body" id="estimate-comparison-body">
-                {comparisonError ? (
-                  <div className="alert alert-warning" role="alert">
-                    {comparisonError}
-                  </div>
-                ) : null}
-                {comparison ? <EstimateComparisonTable comparison={comparison} /> : null}
-                <p className="text-secondary small mt-2 mb-0">
-                  Detailliert = Summe der Gerätezeilen aller Stromkreislisten (Anzahl ×
-                  Leistung × Geräte-GZF), zugeordnet über die Kostengruppe; ohne
-                  Verteiler-GZF.
-                </p>
-              </div>
-            ) : null}
-          </section>
-        </>
-      ) : null}
-
-      {groupDialog ? (
-        <EstimateGroupModal
-          group={groupDialog.group}
-          onClose={() => setGroupDialog(null)}
-          onSave={handleSaveGroup}
-        />
-      ) : null}
-      {gzfTarget ? (
-        <GzfPickerModal onClose={() => setGzfTarget(null)} onSelect={handleSelectGzf} />
-      ) : null}
-    </main>
-  );
-}
-
-function SaveStatusBadge({
-  error,
-  invalidCount,
-  onRetry,
-  status,
-}: {
-  error: string | null;
-  invalidCount: number;
-  onRetry: () => void;
-  status: SaveStatus;
-}) {
-  const label =
-    status === "saving"
-      ? "Wird gespeichert …"
-      : status === "pending"
-        ? "Ungespeicherte Änderungen"
-        : status === "error"
-          ? "Nicht gespeichert – Fehler"
-          : status === "invalid"
-            ? "Nicht gespeichert – ungültige Eingaben"
-            : "Gespeichert";
-  const tone =
-    status === "error" || status === "invalid"
-      ? "is-error"
-      : status === "saved"
-        ? "is-saved"
-        : "is-busy";
-  return (
-    <div className="estimate-save-status" role="status" aria-live="polite">
-      <span className={`estimate-save-badge ${tone}`} title={error ?? undefined}>
-        {label}
-      </span>
-      {invalidCount ? (
-        <span className="estimate-save-hint">
-          {invalidCount === 1
-            ? "1 ungültige Eingabe wird nicht gespeichert"
-            : `${invalidCount} ungültige Eingaben werden nicht gespeichert`}
-        </span>
-      ) : null}
-      {status === "error" ? (
-        <button className="btn btn-link btn-sm p-0" onClick={onRetry} type="button">
-          Erneut versuchen
-        </button>
-      ) : null}
-    </div>
-  );
-}
diff --git a/src/app/projects/[projectId]/grobbilanz/page.tsx b/src/app/projects/[projectId]/grobbilanz/page.tsx
deleted file mode 100644
index 4b2cf81..0000000
--- a/src/app/projects/[projectId]/grobbilanz/page.tsx
+++ /dev/null
@@ -1,292 +0,0 @@
-"use client";
-
-import Link from "next/link";
-import { useParams, useRouter } from "next/navigation";
-import { useCallback, useEffect, useState } from "react";
-import { ArrowLeft, Copy, FolderOpen, Plus, Trash2 } from "lucide-react";
-import {
-  createEstimateBalance,
-  deleteEstimateBalance,
-  getProject,
-  listEstimateBalances,
-} from "../../../../frontend/utils/api";
-import type {
-  CreateEstimateBalanceInput,
-  EstimateBalanceDto,
-  ProjectCommandResultDto,
-  ProjectDto,
-} from "../../../../frontend/types";
-import { calculateEstimateBalance } from "../../../../shared/estimate-balance/estimate-balance";
-import {
-  EstimateBalanceCreateModal,
-  type EstimateBalanceCreateDefaults,
-} from "../../../../frontend/estimate-balance/estimate-balance-create-modal";
-import { createCopyName } from "../../../../frontend/estimate-balance/estimate-balance-document";
-import {
-  formatIsoDateGerman,
-  formatKw,
-} from "../../../../frontend/estimate-balance/estimate-balance-format";
-
-function countRows(balance: EstimateBalanceDto) {
-  return balance.groups.reduce((sum, group) => sum + group.rows.length, 0);
-}
-
-export default function EstimateBalanceListPage() {
-  const params = useParams<{ projectId: string }>();
-  const projectId = params.projectId;
-  const router = useRouter();
-  const [project, setProject] = useState<ProjectDto | null>(null);
-  const [balances, setBalances] = useState<EstimateBalanceDto[]>([]);
-  const [createDefaults, setCreateDefaults] =
-    useState<EstimateBalanceCreateDefaults | null>(null);
-  const [error, setError] = useState<string | null>(null);
-  const [isLoading, setIsLoading] = useState(true);
-  const [isSaving, setIsSaving] = useState(false);
-
-  const reload = useCallback(async () => {
-    const [currentProject, loadedBalances] = await Promise.all([
-      getProject(projectId),
-      listEstimateBalances(projectId),
-    ]);
-    setProject(currentProject);
-    setBalances([...loadedBalances].sort((left, right) => left.sortOrder - right.sortOrder));
-  }, [projectId]);
-
-  useEffect(() => {
-    if (!projectId) {
-      return;
-    }
-    setIsLoading(true);
-    reload()
-      .then(() => setError(null))
-      .catch((err: unknown) =>
-        setError(
-          err instanceof Error
-            ? err.message
-            : "Grobe Leistungsbilanzen konnten nicht geladen werden."
-        )
-      )
-      .finally(() => setIsLoading(false));
-  }, [projectId, reload]);
-
-  async function runCommand<TResult extends ProjectCommandResultDto>(
-    execute: (expectedRevision: number) => Promise<TResult>,
-    fallbackMessage: string
-  ): Promise<TResult | null> {
-    if (!project) {
-      return null;
-    }
-    setIsSaving(true);
-    setError(null);
-    try {
-      const result = await execute(project.currentRevision);
-      setProject((current) =>
-        current ? { ...current, currentRevision: result.history.currentRevision } : current
-      );
-      await reload();
-      return result;
-    } catch (err) {
-      setError(err instanceof Error ? err.message : fallbackMessage);
-      // Refresh revision and list so a stale state does not block the next
-      // attempt; the command error stays visible.
-      await reload().catch(() => undefined);
-      return null;
-    } finally {
-      setIsSaving(false);
-    }
-  }
-
-  async function handleCreate(input: CreateEstimateBalanceInput) {
-    const result = await runCommand(
-      (expectedRevision) => createEstimateBalance(projectId, input, expectedRevision),
-      "Stand konnte nicht angelegt werden."
-    );
-    if (result) {
-      setCreateDefaults(null);
-      router.push(`/projects/${projectId}/grobbilanz/${result.balance.id}`);
-    }
-  }
-
-  async function handleDelete(balance: EstimateBalanceDto) {
-    if (
-      !window.confirm(
-        `Stand „${balance.name}“ der groben Leistungsbilanz wirklich löschen?`
-      )
-    ) {
-      return;
-    }
-    await runCommand(
-      (expectedRevision) => deleteEstimateBalance(projectId, balance.id, expectedRevision),
-      "Stand konnte nicht gelöscht werden."
-    );
-  }
-
-  const isBusy = isSaving || !project;
-  const voltage = project?.threePhaseVoltageV ?? 400;
-
-  return (
-    <main className="container py-4">
-      <div className="page-header">
-        <div className="d-flex align-items-start gap-3">
-          <Link
-            aria-label="Zurück zur Projektübersicht"
-            className="btn btn-outline-secondary btn-sm structure-back-link"
-            href={`/projects/${projectId}`}
-            title="Zurück zur Projektübersicht"
-          >
-            <ArrowLeft aria-hidden="true" size={18} />
-          </Link>
-          <div>
-            <div className="kicker">{project?.name ?? "Projekt"}</div>
-            <h1>Grobe Leistungsbilanz</h1>
-            <p className="text-secondary mb-0">
-              Leistungsabschätzung für Vor- und Entwurfsplanung (LPH 2/3), gegliedert nach
-              Kostengruppen der DIN 276 – unabhängig von den Stromkreislisten.
-            </p>
-          </div>
-        </div>
-        <button
-          className="btn btn-primary"
-          disabled={isBusy}
-          onClick={() => setCreateDefaults({})}
-          type="button"
-        >
-          <Plus aria-hidden="true" className="me-1" size={16} />
-          Neuer Stand
-        </button>
-      </div>
-
-      {error ? (
-        <div className="alert alert-warning" role="alert">
-          {error}
-        </div>
-      ) : null}
-      {isLoading ? (
-        <p className="text-secondary" role="status">
-          Grobe Leistungsbilanzen werden geladen …
-        </p>
-      ) : null}
-
-      <section aria-labelledby="estimate-list-heading" className="card shadow-sm">
-        <div className="card-header d-flex justify-content-between align-items-center">
-          <h2 className="structure-column-title" id="estimate-list-heading">
-            Stände
-            <span className="badge text-bg-secondary ms-2">{balances.length}</span>
-          </h2>
-        </div>
-        {balances.length ? (
-          <div className="table-responsive">
-            <table className="table table-hover align-middle mb-0 estimate-list-table">
-              <thead>
-                <tr>
-                  <th>Stand</th>
-                  <th>LPH</th>
-                  <th>Datum</th>
-                  <th className="text-end">AV kW</th>
-                  <th className="text-end">AV kVA</th>
-                  <th className="text-end">SV kW</th>
-                  <th className="text-end">SV kVA</th>
-                  <th className="text-end">Aktionen</th>
-                </tr>
-              </thead>
-              <tbody>
-                {balances.map((balance) => {
-                  const result = calculateEstimateBalance(balance, voltage);
-                  const href = `/projects/${projectId}/grobbilanz/${balance.id}`;
-                  const rowCount = countRows(balance);
-                  return (
-                    <tr key={balance.id}>
-                      <td>
-                        <Link className="fw-semibold" href={href}>
-                          {balance.name}
-                        </Link>
-                        <div className="text-secondary small">
-                          {balance.groups.length} Kostengruppen ·{" "}
-                          {rowCount === 1 ? "1 Zeile" : `${rowCount} Zeilen`}
-                        </div>
-                      </td>
-                      <td>{balance.workStage ?? "–"}</td>
-                      <td>{formatIsoDateGerman(balance.dateIso)}</td>
-                      <td className="text-end estimate-number">
-                        {formatKw(result.withReserve.av.kw)}
-                      </td>
-                      <td className="text-end estimate-number">
-                        {formatKw(result.withReserve.av.kva)}
-                      </td>
-                      <td className="text-end estimate-number">
-                        {formatKw(result.withReserve.sv.kw)}
-                      </td>
-                      <td className="text-end estimate-number">
-                        {formatKw(result.withReserve.sv.kva)}
-                      </td>
-                      <td className="text-end">
-                        <div className="d-inline-flex gap-1">
-                          <Link
-                            aria-label={`Stand „${balance.name}“ öffnen`}
-                            className="btn btn-sm btn-outline-primary"
-                            href={href}
-                            title="Öffnen"
-                          >
-                            <FolderOpen aria-hidden="true" className="me-1" size={14} />
-                            Öffnen
-                          </Link>
-                          <button
-                            aria-label={`Stand „${balance.name}“ als neuen Stand kopieren`}
-                            className="btn btn-sm btn-outline-secondary structure-icon-button"
-                            disabled={isBusy}
-                            onClick={() =>
-                              setCreateDefaults({
-                                name: createCopyName(balance.name),
-                                workStage: balance.workStage,
-                                template: "copy",
-                                copyFromBalanceId: balance.id,
-                              })
-                            }
-                            title="Als neuen Stand kopieren"
-                            type="button"
-                          >
-                            <Copy aria-hidden="true" size={14} />
-                          </button>
-                          <button
-                            aria-label={`Stand „${balance.name}“ löschen`}
-                            className="btn btn-sm btn-outline-danger structure-icon-button"
-                            disabled={isBusy}
-                            onClick={() => void handleDelete(balance)}
-                            title="Stand löschen"
-                            type="button"
-                          >
-                            <Trash2 aria-hidden="true" size={14} />
-                          </button>
-                        </div>
-                      </td>
-                    </tr>
-                  );
-                })}
-              </tbody>
-            </table>
-            <p className="text-secondary small px-3 py-2 mb-0">
-              Leistungen jeweils inklusive Reserve.
-            </p>
-          </div>
-        ) : !isLoading ? (
-          <div className="card-body">
-            <p className="structure-empty mb-0">
-              Noch kein Stand vorhanden. Mit „Neuer Stand“ eine grobe Leistungsbilanz auf
-              Basis der Vorlage KG 400 anlegen.
-            </p>
-          </div>
-        ) : null}
-      </section>
-
-      {createDefaults ? (
-        <EstimateBalanceCreateModal
-          balances={balances}
-          defaults={createDefaults}
-          isSaving={isSaving}
-          onClose={() => setCreateDefaults(null)}
-          onCreate={(input) => void handleCreate(input)}
-        />
-      ) : null}
-    </main>
-  );
-}
diff --git a/src/db/migrations/0010_estimate_balances.sql b/src/db/migrations/0010_estimate_balances.sql
deleted file mode 100644
index bfa9dd3..0000000
--- a/src/db/migrations/0010_estimate_balances.sql
+++ /dev/null
@@ -1,42 +0,0 @@
-CREATE TABLE `estimate_balances` (
-	`id` text PRIMARY KEY NOT NULL,
-	`project_id` text NOT NULL,
-	`name` text NOT NULL,
-	`work_stage` text,
-	`date_iso` text,
-	`reserve_av_percent` real DEFAULT 0 NOT NULL,
-	`reserve_sv_percent` real DEFAULT 0 NOT NULL,
-	`sort_order` integer DEFAULT 0 NOT NULL,
-	FOREIGN KEY (`project_id`) REFERENCES `projects`(`id`) ON UPDATE no action ON DELETE cascade
-);
---> statement-breakpoint
-CREATE INDEX `estimate_balances_project_id_idx` ON `estimate_balances` (`project_id`);--> statement-breakpoint
-CREATE TABLE `estimate_groups` (
-	`id` text PRIMARY KEY NOT NULL,
-	`balance_id` text NOT NULL,
-	`cost_group` text DEFAULT '' NOT NULL,
-	`title` text NOT NULL,
-	`editor` text,
-	`sort_order` integer DEFAULT 0 NOT NULL,
-	FOREIGN KEY (`balance_id`) REFERENCES `estimate_balances`(`id`) ON UPDATE no action ON DELETE cascade
-);
---> statement-breakpoint
-CREATE INDEX `estimate_groups_balance_id_idx` ON `estimate_groups` (`balance_id`);--> statement-breakpoint
-CREATE TABLE `estimate_rows` (
-	`id` text PRIMARY KEY NOT NULL,
-	`group_id` text NOT NULL,
-	`sort_order` integer DEFAULT 0 NOT NULL,
-	`supply` text,
-	`name` text DEFAULT '' NOT NULL,
-	`quantity` real DEFAULT 0 NOT NULL,
-	`unit` text DEFAULT 'piece' NOT NULL,
-	`connection` text,
-	`power_per_unit_w` real DEFAULT 0 NOT NULL,
-	`simultaneity_factor` real DEFAULT 1 NOT NULL,
-	`cos_phi` real DEFAULT 1 NOT NULL,
-	`safety_supply` integer DEFAULT false NOT NULL,
-	`remark` text,
-	FOREIGN KEY (`group_id`) REFERENCES `estimate_groups`(`id`) ON UPDATE no action ON DELETE cascade
-);
---> statement-breakpoint
-CREATE INDEX `estimate_rows_group_id_idx` ON `estimate_rows` (`group_id`);
\ No newline at end of file
diff --git a/src/db/migrations/meta/0010_snapshot.json b/src/db/migrations/meta/0010_snapshot.json
deleted file mode 100644
index d58518a..0000000
--- a/src/db/migrations/meta/0010_snapshot.json
+++ /dev/null
@@ -1,2924 +0,0 @@
-{
-  "version": "6",
-  "dialect": "sqlite",
-  "id": "5376ae9f-67c7-4603-b3d2-8527136436f9",
-  "prevId": "2cd9adef-2f08-4635-b3d9-ecf71f624c7f",
-  "tables": {
-    "buildings": {
-      "name": "buildings",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "project_id": {
-          "name": "project_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "name": {
-          "name": "name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "sort_order": {
-          "name": "sort_order",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 0
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {
-        "buildings_project_id_projects_id_fk": {
-          "name": "buildings_project_id_projects_id_fk",
-          "tableFrom": "buildings",
-          "tableTo": "projects",
-          "columnsFrom": [
-            "project_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    },
-    "circuit_device_rows": {
-      "name": "circuit_device_rows",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "circuit_id": {
-          "name": "circuit_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "linked_project_device_id": {
-          "name": "linked_project_device_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "sort_order": {
-          "name": "sort_order",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 0
-        },
-        "name": {
-          "name": "name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "display_name": {
-          "name": "display_name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "phase_type": {
-          "name": "phase_type",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "connection_kind": {
-          "name": "connection_kind",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "cost_group": {
-          "name": "cost_group",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "category": {
-          "name": "category",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "level": {
-          "name": "level",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "room_id": {
-          "name": "room_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "room_number_snapshot": {
-          "name": "room_number_snapshot",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "room_name_snapshot": {
-          "name": "room_name_snapshot",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "quantity": {
-          "name": "quantity",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "manual_quantity": {
-          "name": "manual_quantity",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 0
-        },
-        "power_per_unit": {
-          "name": "power_per_unit",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "simultaneity_factor": {
-          "name": "simultaneity_factor",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "cos_phi": {
-          "name": "cos_phi",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "remark": {
-          "name": "remark",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "overridden_fields": {
-          "name": "overridden_fields",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        }
-      },
-      "indexes": {
-        "circuit_device_rows_circuit_id_idx": {
-          "name": "circuit_device_rows_circuit_id_idx",
-          "columns": [
-            "circuit_id"
-          ],
-          "isUnique": false
-        }
-      },
-      "foreignKeys": {
-        "circuit_device_rows_circuit_id_circuits_id_fk": {
-          "name": "circuit_device_rows_circuit_id_circuits_id_fk",
-          "tableFrom": "circuit_device_rows",
-          "tableTo": "circuits",
-          "columnsFrom": [
-            "circuit_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        },
-        "circuit_device_rows_linked_project_device_id_project_devices_id_fk": {
-          "name": "circuit_device_rows_linked_project_device_id_project_devices_id_fk",
-          "tableFrom": "circuit_device_rows",
-          "tableTo": "project_devices",
-          "columnsFrom": [
-            "linked_project_device_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "set null",
-          "onUpdate": "no action"
-        },
-        "circuit_device_rows_room_id_rooms_id_fk": {
-          "name": "circuit_device_rows_room_id_rooms_id_fk",
-          "tableFrom": "circuit_device_rows",
-          "tableTo": "rooms",
-          "columnsFrom": [
-            "room_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "set null",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    },
-    "circuit_list_equipment_identifiers": {
-      "name": "circuit_list_equipment_identifiers",
-      "columns": {
-        "owner_type": {
-          "name": "owner_type",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "owner_id": {
-          "name": "owner_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "circuit_list_id": {
-          "name": "circuit_list_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "equipment_identifier": {
-          "name": "equipment_identifier",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        }
-      },
-      "indexes": {
-        "circuit_list_equipment_identifiers_owner_unique": {
-          "name": "circuit_list_equipment_identifiers_owner_unique",
-          "columns": [
-            "owner_type",
-            "owner_id"
-          ],
-          "isUnique": true
-        },
-        "circuit_list_equipment_identifiers_list_identifier_unique": {
-          "name": "circuit_list_equipment_identifiers_list_identifier_unique",
-          "columns": [
-            "circuit_list_id",
-            "equipment_identifier"
-          ],
-          "isUnique": true
-        }
-      },
-      "foreignKeys": {
-        "circuit_list_equipment_identifiers_circuit_list_id_circuit_lists_id_fk": {
-          "name": "circuit_list_equipment_identifiers_circuit_list_id_circuit_lists_id_fk",
-          "tableFrom": "circuit_list_equipment_identifiers",
-          "tableTo": "circuit_lists",
-          "columnsFrom": [
-            "circuit_list_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    },
-    "circuit_lists": {
-      "name": "circuit_lists",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "project_id": {
-          "name": "project_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "distribution_board_id": {
-          "name": "distribution_board_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "name": {
-          "name": "name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        }
-      },
-      "indexes": {
-        "circuit_lists_distribution_board_id_unique": {
-          "name": "circuit_lists_distribution_board_id_unique",
-          "columns": [
-            "distribution_board_id"
-          ],
-          "isUnique": true
-        }
-      },
-      "foreignKeys": {
-        "circuit_lists_project_id_projects_id_fk": {
-          "name": "circuit_lists_project_id_projects_id_fk",
-          "tableFrom": "circuit_lists",
-          "tableTo": "projects",
-          "columnsFrom": [
-            "project_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        },
-        "circuit_lists_distribution_board_id_distribution_boards_id_fk": {
-          "name": "circuit_lists_distribution_board_id_distribution_boards_id_fk",
-          "tableFrom": "circuit_lists",
-          "tableTo": "distribution_boards",
-          "columnsFrom": [
-            "distribution_board_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    },
-    "circuit_protection_devices": {
-      "name": "circuit_protection_devices",
-      "columns": {
-        "circuit_id": {
-          "name": "circuit_id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "type": {
-          "name": "type",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "rated_current_a": {
-          "name": "rated_current_a",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "fuse_utilization_category": {
-          "name": "fuse_utilization_category",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "trip_characteristic": {
-          "name": "trip_characteristic",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "rcd_type": {
-          "name": "rcd_type",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "rated_residual_current_ma": {
-          "name": "rated_residual_current_ma",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {
-        "circuit_protection_devices_circuit_id_circuits_id_fk": {
-          "name": "circuit_protection_devices_circuit_id_circuits_id_fk",
-          "tableFrom": "circuit_protection_devices",
-          "tableTo": "circuits",
-          "columnsFrom": [
-            "circuit_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    },
-    "circuit_sections": {
-      "name": "circuit_sections",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "circuit_list_id": {
-          "name": "circuit_list_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "key": {
-          "name": "key",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "display_name": {
-          "name": "display_name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "prefix": {
-          "name": "prefix",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "sort_order": {
-          "name": "sort_order",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 0
-        },
-        "category": {
-          "name": "category",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "group_number": {
-          "name": "group_number",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        }
-      },
-      "indexes": {
-        "circuit_sections_list_key_unique": {
-          "name": "circuit_sections_list_key_unique",
-          "columns": [
-            "circuit_list_id",
-            "key"
-          ],
-          "isUnique": true
-        },
-        "circuit_sections_list_prefix_unique": {
-          "name": "circuit_sections_list_prefix_unique",
-          "columns": [
-            "circuit_list_id",
-            "prefix"
-          ],
-          "isUnique": true
-        },
-        "circuit_sections_list_category_group_unique": {
-          "name": "circuit_sections_list_category_group_unique",
-          "columns": [
-            "circuit_list_id",
-            "category",
-            "group_number"
-          ],
-          "isUnique": true
-        }
-      },
-      "foreignKeys": {
-        "circuit_sections_circuit_list_id_circuit_lists_id_fk": {
-          "name": "circuit_sections_circuit_list_id_circuit_lists_id_fk",
-          "tableFrom": "circuit_sections",
-          "tableTo": "circuit_lists",
-          "columnsFrom": [
-            "circuit_list_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    },
-    "circuits": {
-      "name": "circuits",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "circuit_list_id": {
-          "name": "circuit_list_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "section_id": {
-          "name": "section_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "equipment_identifier": {
-          "name": "equipment_identifier",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "display_name": {
-          "name": "display_name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "sort_order": {
-          "name": "sort_order",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 0
-        },
-        "cable_type": {
-          "name": "cable_type",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "cable_cross_section": {
-          "name": "cable_cross_section",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "cable_length": {
-          "name": "cable_length",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "rcd_assignment": {
-          "name": "rcd_assignment",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "terminal_designation": {
-          "name": "terminal_designation",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "voltage": {
-          "name": "voltage",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "control_requirement": {
-          "name": "control_requirement",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "status": {
-          "name": "status",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "is_reserve": {
-          "name": "is_reserve",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 0
-        },
-        "remark": {
-          "name": "remark",
-          "type": "text",
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-    "project_devices": {
-      "name": "project_devices",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "project_id": {
-          "name": "project_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "name": {
-          "name": "name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "display_name": {
-          "name": "display_name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "phase_type": {
-          "name": "phase_type",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": "'single_phase'"
-        },
-        "connection_kind": {
-          "name": "connection_kind",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "cost_group": {
-          "name": "cost_group",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "category": {
-          "name": "category",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "quantity": {
-          "name": "quantity",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "power_per_unit": {
-          "name": "power_per_unit",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 0
-        },
-        "simultaneity_factor": {
-          "name": "simultaneity_factor",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 1
-        },
-        "cos_phi": {
-          "name": "cos_phi",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "remark": {
-          "name": "remark",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "voltage_v": {
-          "name": "voltage_v",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {
-        "project_devices_project_id_projects_id_fk": {
-          "name": "project_devices_project_id_projects_id_fk",
-          "tableFrom": "project_devices",
-          "tableTo": "projects",
-          "columnsFrom": [
-            "project_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    },
-    "project_history_stack_entries": {
-      "name": "project_history_stack_entries",
-      "columns": {
-        "change_set_id": {
-          "name": "change_set_id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "project_id": {
-          "name": "project_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "stack": {
-          "name": "stack",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "position": {
-          "name": "position",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        }
-      },
-      "indexes": {
-        "project_history_stack_entries_position_unique": {
-          "name": "project_history_stack_entries_position_unique",
-          "columns": [
-            "project_id",
-            "stack",
-            "position"
-          ],
-          "isUnique": true
-        }
-      },
-      "foreignKeys": {
-        "project_history_stack_entries_change_set_id_project_change_sets_id_fk": {
-          "name": "project_history_stack_entries_change_set_id_project_change_sets_id_fk",
-          "tableFrom": "project_history_stack_entries",
-          "tableTo": "project_change_sets",
-          "columnsFrom": [
-            "change_set_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        },
-        "project_history_stack_entries_project_id_projects_id_fk": {
-          "name": "project_history_stack_entries_project_id_projects_id_fk",
-          "tableFrom": "project_history_stack_entries",
-          "tableTo": "projects",
-          "columnsFrom": [
-            "project_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {
-        "project_history_stack_entries_stack_check": {
-          "name": "project_history_stack_entries_stack_check",
-          "value": "\"project_history_stack_entries\".\"stack\" in ('undo', 'redo')"
-        }
-      }
-    },
-    "project_revisions": {
-      "name": "project_revisions",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "project_id": {
-          "name": "project_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "revision_number": {
-          "name": "revision_number",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "created_at_iso": {
-          "name": "created_at_iso",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "actor_id": {
-          "name": "actor_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "source": {
-          "name": "source",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "description": {
-          "name": "description",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        }
-      },
-      "indexes": {
-        "project_revisions_project_number_unique": {
-          "name": "project_revisions_project_number_unique",
-          "columns": [
-            "project_id",
-            "revision_number"
-          ],
-          "isUnique": true
-        }
-      },
-      "foreignKeys": {
-        "project_revisions_project_id_projects_id_fk": {
-          "name": "project_revisions_project_id_projects_id_fk",
-          "tableFrom": "project_revisions",
-          "tableTo": "projects",
-          "columnsFrom": [
-            "project_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    },
-    "project_snapshots": {
-      "name": "project_snapshots",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "project_id": {
-          "name": "project_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "source_revision": {
-          "name": "source_revision",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "schema_version": {
-          "name": "schema_version",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "kind": {
-          "name": "kind",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": "'named'"
-        },
-        "name": {
-          "name": "name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "description": {
-          "name": "description",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "payload_json": {
-          "name": "payload_json",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "payload_sha256": {
-          "name": "payload_sha256",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "created_at_iso": {
-          "name": "created_at_iso",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "created_by_actor_id": {
-          "name": "created_by_actor_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        }
-      },
-      "indexes": {
-        "project_snapshots_project_created_idx": {
-          "name": "project_snapshots_project_created_idx",
-          "columns": [
-            "project_id",
-            "created_at_iso"
-          ],
-          "isUnique": false
-        },
-        "project_snapshots_project_kind_revision_idx": {
-          "name": "project_snapshots_project_kind_revision_idx",
-          "columns": [
-            "project_id",
-            "kind",
-            "source_revision"
-          ],
-          "isUnique": false
-        },
-        "project_snapshots_project_name_unique": {
-          "name": "project_snapshots_project_name_unique",
-          "columns": [
-            "project_id",
-            "name"
-          ],
-          "isUnique": true
-        }
-      },
-      "foreignKeys": {
-        "project_snapshots_project_id_projects_id_fk": {
-          "name": "project_snapshots_project_id_projects_id_fk",
-          "tableFrom": "project_snapshots",
-          "tableTo": "projects",
-          "columnsFrom": [
-            "project_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    },
-    "projects": {
-      "name": "projects",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "name": {
-          "name": "name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "internal_project_number": {
-          "name": "internal_project_number",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "external_project_number": {
-          "name": "external_project_number",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "building_owner": {
-          "name": "building_owner",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "description": {
-          "name": "description",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "is_public_building": {
-          "name": "is_public_building",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": false
-        },
-        "single_phase_voltage_v": {
-          "name": "single_phase_voltage_v",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 230
-        },
-        "three_phase_voltage_v": {
-          "name": "three_phase_voltage_v",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 400
-        },
-        "enabled_distribution_board_supply_types": {
-          "name": "enabled_distribution_board_supply_types",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": "'[\"AV\",\"SV\",\"EV\",\"USV\",\"MSR\",\"SiBe\"]'"
-        },
-        "site_address": {
-          "name": "site_address",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "work_stage": {
-          "name": "work_stage",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "project_lead": {
-          "name": "project_lead",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "project_editor": {
-          "name": "project_editor",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "current_revision": {
-          "name": "current_revision",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 0
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {},
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    },
-    "rooms": {
-      "name": "rooms",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "project_id": {
-          "name": "project_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "floor_id": {
-          "name": "floor_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
-        },
-        "room_number": {
-          "name": "room_number",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "room_name": {
-          "name": "room_name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {
-        "rooms_project_id_projects_id_fk": {
-          "name": "rooms_project_id_projects_id_fk",
-          "tableFrom": "rooms",
-          "tableTo": "projects",
-          "columnsFrom": [
-            "project_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        },
-        "rooms_floor_id_floors_id_fk": {
-          "name": "rooms_floor_id_floors_id_fk",
-          "tableFrom": "rooms",
-          "tableTo": "floors",
-          "columnsFrom": [
-            "floor_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "set null",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
-    }
-  },
-  "views": {},
-  "enums": {},
-  "_meta": {
-    "schemas": {},
-    "tables": {},
-    "columns": {}
-  },
-  "internal": {
-    "indexes": {}
-  }
-}
\ No newline at end of file
diff --git a/src/db/migrations/meta/_journal.json b/src/db/migrations/meta/_journal.json
index f2c5dba..485b8f4 100644
--- a/src/db/migrations/meta/_journal.json
+++ b/src/db/migrations/meta/_journal.json
@@ -71,13 +71,6 @@
       "when": 1790419185882,
       "tag": "0009_buildings",
       "breakpoints": true
-    },
-    {
-      "idx": 10,
-      "version": "6",
-      "when": 1790438092269,
-      "tag": "0010_estimate_balances",
-      "breakpoints": true
     }
   ]
 }
\ No newline at end of file
diff --git a/src/db/repositories/estimate-balance-project-command.repository.ts b/src/db/repositories/estimate-balance-project-command.repository.ts
deleted file mode 100644
index b31ca78..0000000
--- a/src/db/repositories/estimate-balance-project-command.repository.ts
+++ /dev/null
@@ -1,132 +0,0 @@
-import { eq } from "drizzle-orm";
-import {
-  assertEstimateBalanceDeleteProjectCommand,
-  assertEstimateBalanceInsertProjectCommand,
-  assertEstimateBalanceUpdateProjectCommand,
-  createEstimateBalanceDeleteProjectCommand,
-  createEstimateBalanceInsertProjectCommand,
-  createEstimateBalanceUpdateProjectCommand,
-  estimateBalanceDeleteCommandType,
-  estimateBalanceInsertCommandType,
-  estimateBalanceUpdateCommandType,
-  normalizeEstimateBalanceSnapshot,
-  sameEstimateBalance,
-  type EstimateBalanceProjectCommand,
-} from "../../estimate-balance/domain/estimate-balance-command.model.js";
-import type {
-  EstimateBalanceProjectCommandStore,
-  ExecuteEstimateBalanceCommandInput,
-} from "../../estimate-balance/domain/estimate-balance-project-command.store.js";
-import type { EstimateBalanceSnapshot } from "../../shared/estimate-balance/estimate-balance.js";
-import type { AppDatabase } from "../database-context.js";
-import { estimateBalances } from "../schema/estimate-balances.js";
-import { projects } from "../schema/projects.js";
-import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import {
-  deleteEstimateBalance,
-  insertEstimateBalance,
-  readEstimateBalances,
-} from "./estimate-balance.persistence.js";
-
-export class EstimateBalanceProjectCommandRepository
-  implements EstimateBalanceProjectCommandStore
-{
-  constructor(private readonly database: AppDatabase) {}
-
-  execute(input: ExecuteEstimateBalanceCommandInput) {
-    return executeProjectCommandTransaction(this.database, input, (tx) =>
-      this.applyCommand(tx, input.projectId, input.command)
-    );
-  }
-
-  private applyCommand(
-    database: AppDatabase,
-    projectId: string,
-    command: EstimateBalanceProjectCommand
-  ): EstimateBalanceProjectCommand {
-    switch (command.type) {
-      case estimateBalanceInsertCommandType:
-        assertEstimateBalanceInsertProjectCommand(command);
-        return this.insert(database, projectId, command.payload.balance);
-      case estimateBalanceDeleteCommandType:
-        assertEstimateBalanceDeleteProjectCommand(command);
-        return this.delete(database, projectId, command.payload.balance);
-      case estimateBalanceUpdateCommandType:
-        assertEstimateBalanceUpdateProjectCommand(command);
-        return this.update(
-          database,
-          projectId,
-          command.payload.expected,
-          command.payload.target
-        );
-    }
-  }
-
-  private insert(
-    database: AppDatabase,
-    projectId: string,
-    balance: EstimateBalanceSnapshot
-  ) {
-    if (balance.projectId !== projectId) {
-      throw new Error("Estimate-balance snapshot does not belong to project.");
-    }
-    const project = database
-      .select({ id: projects.id })
-      .from(projects)
-      .where(eq(projects.id, projectId))
-      .get();
-    if (!project) {
-      throw new Error("Project does not exist.");
-    }
-    const existing = database
-      .select({ id: estimateBalances.id })
-      .from(estimateBalances)
-      .where(eq(estimateBalances.id, balance.id))
-      .get();
-    if (existing) {
-      throw new Error("Estimate-balance id already exists.");
-    }
-    const normalized = normalizeEstimateBalanceSnapshot(balance);
-    insertEstimateBalance(database, normalized);
-    return createEstimateBalanceDeleteProjectCommand(normalized);
-  }
-
-  private delete(
-    database: AppDatabase,
-    projectId: string,
-    expected: EstimateBalanceSnapshot
-  ) {
-    this.assertPersisted(database, projectId, expected, "deletion");
-    if (deleteEstimateBalance(database, projectId, expected.id) !== 1) {
-      throw new Error("Estimate balance could not be deleted.");
-    }
-    return createEstimateBalanceInsertProjectCommand(expected);
-  }
-
-  private update(
-    database: AppDatabase,
-    projectId: string,
-    expected: EstimateBalanceSnapshot,
-    target: EstimateBalanceSnapshot
-  ) {
-    this.assertPersisted(database, projectId, expected, "update");
-    // Group and row ids stay stable; replacing the whole document keeps the
-    // command exact and its inverse trivially the swapped pair.
-    deleteEstimateBalance(database, projectId, expected.id);
-    const normalized = normalizeEstimateBalanceSnapshot(target);
-    insertEstimateBalance(database, normalized);
-    return createEstimateBalanceUpdateProjectCommand(normalized, expected);
-  }
-
-  private assertPersisted(
-    database: AppDatabase,
-    projectId: string,
-    expected: EstimateBalanceSnapshot,
-    action: string
-  ) {
-    const [persisted] = readEstimateBalances(database, projectId, expected.id);
-    if (!persisted || !sameEstimateBalance(persisted, expected)) {
-      throw new Error(`Estimate balance changed before ${action}.`);
-    }
-  }
-}
diff --git a/src/db/repositories/estimate-balance.persistence.ts b/src/db/repositories/estimate-balance.persistence.ts
deleted file mode 100644
index 4d59aa6..0000000
--- a/src/db/repositories/estimate-balance.persistence.ts
+++ /dev/null
@@ -1,121 +0,0 @@
-import { and, asc, eq, inArray } from "drizzle-orm";
-import type { EstimateBalanceSnapshot } from "../../shared/estimate-balance/estimate-balance.js";
-import type { AppDatabase } from "../database-context.js";
-import {
-  estimateBalances,
-  estimateGroups,
-  estimateRows,
-} from "../schema/estimate-balances.js";
-
-/** Reads complete balance documents of a project, ordered like the UI shows them. */
-export function readEstimateBalances(
-  database: AppDatabase,
-  projectId: string,
-  balanceId?: string
-): EstimateBalanceSnapshot[] {
-  const balances = database
-    .select()
-    .from(estimateBalances)
-    .where(
-      balanceId
-        ? and(
-            eq(estimateBalances.projectId, projectId),
-            eq(estimateBalances.id, balanceId)
-          )
-        : eq(estimateBalances.projectId, projectId)
-    )
-    .orderBy(asc(estimateBalances.sortOrder), asc(estimateBalances.id))
-    .all();
-  if (!balances.length) {
-    return [];
-  }
-  const groups = database
-    .select()
-    .from(estimateGroups)
-    .where(inArray(estimateGroups.balanceId, balances.map((balance) => balance.id)))
-    .orderBy(asc(estimateGroups.sortOrder), asc(estimateGroups.id))
-    .all();
-  const rows = groups.length
-    ? database
-        .select()
-        .from(estimateRows)
-        .where(inArray(estimateRows.groupId, groups.map((group) => group.id)))
-        .orderBy(asc(estimateRows.sortOrder), asc(estimateRows.id))
-        .all()
-    : [];
-  return balances.map((balance) => ({
-    id: balance.id,
-    projectId: balance.projectId,
-    name: balance.name,
-    workStage: balance.workStage,
-    dateIso: balance.dateIso,
-    reserveAvPercent: balance.reserveAvPercent,
-    reserveSvPercent: balance.reserveSvPercent,
-    sortOrder: balance.sortOrder,
-    groups: groups
-      .filter((group) => group.balanceId === balance.id)
-      .map((group) => ({
-        id: group.id,
-        costGroup: group.costGroup,
-        title: group.title,
-        editor: group.editor,
-        sortOrder: group.sortOrder,
-        rows: rows
-          .filter((row) => row.groupId === group.id)
-          .map(({ groupId: _groupId, ...row }) => row),
-      })),
-  }));
-}
-
-/** Writes a complete balance document (the caller removed an older version first). */
-export function insertEstimateBalance(
-  database: AppDatabase,
-  balance: EstimateBalanceSnapshot
-) {
-  database
-    .insert(estimateBalances)
-    .values({
-      id: balance.id,
-      projectId: balance.projectId,
-      name: balance.name,
-      workStage: balance.workStage,
-      dateIso: balance.dateIso,
-      reserveAvPercent: balance.reserveAvPercent,
-      reserveSvPercent: balance.reserveSvPercent,
-      sortOrder: balance.sortOrder,
-    })
-    .run();
-  for (const group of balance.groups) {
-    database
-      .insert(estimateGroups)
-      .values({
-        id: group.id,
-        balanceId: balance.id,
-        costGroup: group.costGroup,
-        title: group.title,
-        editor: group.editor,
-        sortOrder: group.sortOrder,
-      })
-      .run();
-    if (group.rows.length) {
-      database
-        .insert(estimateRows)
-        .values(group.rows.map((row) => ({ ...row, groupId: group.id })))
-        .run();
-    }
-  }
-}
-
-/** Removes a balance with its groups and rows (foreign keys cascade). */
-export function deleteEstimateBalance(
-  database: AppDatabase,
-  projectId: string,
-  balanceId: string
-) {
-  return database
-    .delete(estimateBalances)
-    .where(
-      and(eq(estimateBalances.projectId, projectId), eq(estimateBalances.id, balanceId))
-    )
-    .run().changes;
-}
diff --git a/src/db/repositories/estimate-balance.repository.ts b/src/db/repositories/estimate-balance.repository.ts
deleted file mode 100644
index 4c70d27..0000000
--- a/src/db/repositories/estimate-balance.repository.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-import { asc, eq } from "drizzle-orm";
-import type {
-  DetailedDeviceRowPower,
-  EstimateBalanceSnapshot,
-} from "../../shared/estimate-balance/estimate-balance.js";
-import { calculateRowTotalPower } from "../../domain/calculations/circuit-power-calculation.js";
-import type { AppDatabase } from "../database-context.js";
-import { circuitDeviceRows } from "../schema/circuit-device-rows.js";
-import { circuitLists } from "../schema/circuit-lists.js";
-import { circuits } from "../schema/circuits.js";
-import { estimateBalances } from "../schema/estimate-balances.js";
-import { readEstimateBalances } from "./estimate-balance.persistence.js";
-
-/** Read side of the estimate-balance module; writes go through commands. */
-export class EstimateBalanceRepository {
-  constructor(private readonly database: AppDatabase) {}
-
-  listByProject(projectId: string): EstimateBalanceSnapshot[] {
-    return readEstimateBalances(this.database, projectId);
-  }
-
-  findById(projectId: string, balanceId: string): EstimateBalanceSnapshot | null {
-    return readEstimateBalances(this.database, projectId, balanceId)[0] ?? null;
-  }
-
-  nextSortOrder(projectId: string): number {
-    const rows = this.database
-      .select({ sortOrder: estimateBalances.sortOrder })
-      .from(estimateBalances)
-      .where(eq(estimateBalances.projectId, projectId))
-      .orderBy(asc(estimateBalances.sortOrder))
-      .all();
-    return rows.length ? Math.max(...rows.map((row) => row.sortOrder)) + 1 : 0;
-  }
-
-  /**
-   * Device rows of all circuit lists of the project with their total power
-   * (quantity · power per unit · device GZF, like the circuit tree).
-   */
-  listDetailedDeviceRowPower(projectId: string): DetailedDeviceRowPower[] {
-    return this.database
-      .select({
-        costGroup: circuitDeviceRows.costGroup,
-        quantity: circuitDeviceRows.quantity,
-        powerPerUnit: circuitDeviceRows.powerPerUnit,
-        simultaneityFactor: circuitDeviceRows.simultaneityFactor,
-        cosPhi: circuitDeviceRows.cosPhi,
-      })
-      .from(circuitDeviceRows)
-      .innerJoin(circuits, eq(circuits.id, circuitDeviceRows.circuitId))
-      .innerJoin(circuitLists, eq(circuitLists.id, circuits.circuitListId))
-      .where(eq(circuitLists.projectId, projectId))
-      .all()
-      .map((row) => ({
-        costGroup: row.costGroup,
-        kw: calculateRowTotalPower(row.quantity, row.powerPerUnit, row.simultaneityFactor),
-        cosPhi: row.cosPhi,
-      }));
-  }
-}
diff --git a/src/db/repositories/project-state-restore-command.repository.ts b/src/db/repositories/project-state-restore-command.repository.ts
index 97cfe17..496f2cb 100644
--- a/src/db/repositories/project-state-restore-command.repository.ts
+++ b/src/db/repositories/project-state-restore-command.repository.ts
@@ -3,8 +3,6 @@ import { ProjectStateConflictError } from "../../domain/errors/project-state-con
 import {
   assertProjectStateRestoreCommand,
   createProjectStateRestoreCommand,
-  createProjectTransferRestoreCommand,
-  projectStateRestoreCommandSchemaVersion,
 } from "../../domain/models/project-state-restore-command.model.js";
 import {
   parseProjectStateSnapshot,
@@ -15,8 +13,6 @@ import type {
   ProjectStateRestoreCommandStore,
 } from "../../domain/ports/project-state-restore-command.store.js";
 import type { AppDatabase } from "../database-context.js";
-import { canonicalEstimateBalance } from "../../estimate-balance/domain/estimate-balance-command.model.js";
-import type { EstimateBalanceSnapshot } from "../../shared/estimate-balance/estimate-balance.js";
 import { circuitDeviceRows } from "../schema/circuit-device-rows.js";
 import { circuitLists } from "../schema/circuit-lists.js";
 import { circuitProtectionDevices } from "../schema/circuit-protection-devices.js";
@@ -36,11 +32,6 @@ import { externalImportBatches } from "../schema/external-import-batches.js";
 import { externalModelObjects } from "../schema/external-model-objects.js";
 import { externalModelSources } from "../schema/external-model-sources.js";
 import { externalRoomMappings } from "../schema/external-room-mappings.js";
-import { estimateBalances } from "../schema/estimate-balances.js";
-import {
-  insertEstimateBalance,
-  readEstimateBalances,
-} from "./estimate-balance.persistence.js";
 import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
 import {
   readProjectStateSnapshot,
@@ -75,39 +66,10 @@ export class ProjectStateRestoreCommandRepository
     if (!current) {
       throw new Error("Project not found.");
     }
-    const currentEstimateBalances = readEstimateBalances(tx, input.projectId);
-    const transferCommand =
-      input.command.schemaVersion === projectStateRestoreCommandSchemaVersion
-        ? input.command
-        : null;
     if (
       current.payloadSha256 !==
         input.command.payload.expectedStateSha256 &&
-      !matchesHistoryRestoreTarget(
-        tx,
-        input,
-        current.state,
-        currentEstimateBalances
-      )
-    ) {
-      throw new ProjectStateConflictError(
-        input.projectId,
-        input.command.payload.expectedStateSha256,
-        current.payloadSha256
-      );
-    }
-    if (
-      transferCommand &&
-      canonicalEstimateBalances(currentEstimateBalances) !==
-        canonicalEstimateBalances(
-          transferCommand.payload.expectedEstimateBalances
-        ) &&
-      !matchesHistoryRestoreTarget(
-        tx,
-        input,
-        current.state,
-        currentEstimateBalances
-      )
+      !matchesHistoryRestoreTarget(tx, input, current.state)
     ) {
       throw new ProjectStateConflictError(
         input.projectId,
@@ -120,28 +82,14 @@ export class ProjectStateRestoreCommandRepository
       input.command.payload.targetState
     );
     replaceProjectState(tx, targetState);
-    if (transferCommand) {
-      replaceEstimateBalances(
-        tx,
-        input.projectId,
-        transferCommand.payload.targetEstimateBalances
-      );
-    }
     const persistedTarget = readProjectStateSnapshot(tx, input.projectId);
     if (!persistedTarget) {
       throw new Error("Restored project could not be loaded.");
     }
-    const inverse = transferCommand
-      ? createProjectTransferRestoreCommand(
-          persistedTarget.payloadSha256,
-          current.state,
-          transferCommand.payload.targetEstimateBalances,
-          currentEstimateBalances
-        )
-      : createProjectStateRestoreCommand(
-          persistedTarget.payloadSha256,
-          current.state
-        );
+    const inverse = createProjectStateRestoreCommand(
+      persistedTarget.payloadSha256,
+      current.state
+    );
 
     return inverse;
   }
@@ -150,8 +98,7 @@ export class ProjectStateRestoreCommandRepository
 function matchesHistoryRestoreTarget(
   database: AppDatabase,
   input: ExecuteProjectStateRestoreCommandInput,
-  currentState: ProjectStateSnapshot,
-  currentEstimateBalances: EstimateBalanceSnapshot[]
+  currentState: ProjectStateSnapshot
 ) {
   if (
     (input.source !== "undo" && input.source !== "redo") ||
@@ -175,45 +122,25 @@ function matchesHistoryRestoreTarget(
       input.source === "undo"
         ? changeSet.forwardPayloadJson
         : changeSet.inversePayloadJson;
-    const command = JSON.parse(serialized) as unknown;
-    assertProjectStateRestoreCommand(command);
-    const expectedState = parseProjectStateSnapshot(command.payload.targetState);
-    const stateMatches =
-      canonicalProjectState(expectedState) ===
-      canonicalProjectState(currentState);
-    if (!stateMatches) {
+    const command = JSON.parse(serialized) as {
+      type?: unknown;
+      payload?: { targetState?: unknown };
+    };
+    if (command.type !== "project.restore-state") {
       return false;
     }
-    return command.schemaVersion !== projectStateRestoreCommandSchemaVersion ||
-      canonicalEstimateBalances(command.payload.targetEstimateBalances) ===
-        canonicalEstimateBalances(currentEstimateBalances);
+    const expectedState = parseProjectStateSnapshot(
+      command.payload?.targetState
+    );
+    return (
+      canonicalProjectState(expectedState) ===
+      canonicalProjectState(currentState)
+    );
   } catch {
     return false;
   }
 }
 
-function canonicalEstimateBalances(balances: EstimateBalanceSnapshot[]) {
-  return JSON.stringify(
-    [...balances]
-      .sort((left, right) => left.id.localeCompare(right.id))
-      .map((balance) => canonicalEstimateBalance(balance))
-  );
-}
-
-function replaceEstimateBalances(
-  database: AppDatabase,
-  projectId: string,
-  balances: EstimateBalanceSnapshot[]
-) {
-  database
-    .delete(estimateBalances)
-    .where(eq(estimateBalances.projectId, projectId))
-    .run();
-  for (const balance of balances) {
-    insertEstimateBalance(database, balance);
-  }
-}
-
 function canonicalProjectState(state: ProjectStateSnapshot) {
   return JSON.stringify({
     ...state,
diff --git a/src/db/repositories/project-transfer.repository.ts b/src/db/repositories/project-transfer.repository.ts
index 21647ff..11f23f7 100644
--- a/src/db/repositories/project-transfer.repository.ts
+++ b/src/db/repositories/project-transfer.repository.ts
@@ -3,11 +3,9 @@ import { eq } from "drizzle-orm";
 import {
   createProjectTransferEnvelope,
   parseProjectTransferEnvelope,
-  remapEstimateBalances,
   remapProjectState,
-  serializeProjectTransferPayload,
 } from "../../domain/models/project-transfer.model.js";
-import { createProjectTransferRestoreCommand } from "../../domain/models/project-state-restore-command.model.js";
+import { createProjectStateRestoreCommand } from "../../domain/models/project-state-restore-command.model.js";
 import type { ProjectTransferStore } from "../../domain/ports/project-transfer.store.js";
 import type { AppDatabase } from "../database-context.js";
 import { circuitDeviceRows } from "../schema/circuit-device-rows.js";
@@ -28,10 +26,6 @@ import { externalImportBatches } from "../schema/external-import-batches.js";
 import { externalModelObjects } from "../schema/external-model-objects.js";
 import { externalModelSources } from "../schema/external-model-sources.js";
 import { externalRoomMappings } from "../schema/external-room-mappings.js";
-import {
-  insertEstimateBalance,
-  readEstimateBalances,
-} from "./estimate-balance.persistence.js";
 import {
   hashProjectStatePayload,
   readProjectStateSnapshot,
@@ -46,15 +40,10 @@ export class ProjectTransferRepository implements ProjectTransferStore {
     if (!snapshot) {
       return null;
     }
-    const estimateBalances = readEstimateBalances(this.database, projectId);
-    const payloadSha256 = hashProjectStatePayload(
-      serializeProjectTransferPayload(snapshot.state, estimateBalances)
-    );
     return createProjectTransferEnvelope(
       new Date().toISOString(),
-      payloadSha256,
-      snapshot.state,
-      estimateBalances
+      snapshot.payloadSha256,
+      snapshot.state
     );
   }
 
@@ -72,21 +61,10 @@ export class ProjectTransferRepository implements ProjectTransferStore {
             projectId,
             () => crypto.randomUUID()
           );
-    const currentEstimateBalances = readEstimateBalances(this.database, projectId);
-    const targetEstimateBalances =
-      transfer.projectState.project.id === projectId
-        ? transfer.estimateBalances
-        : remapEstimateBalances(
-            transfer.estimateBalances,
-            projectId,
-            () => crypto.randomUUID()
-          );
     return {
-      command: createProjectTransferRestoreCommand(
+      command: createProjectStateRestoreCommand(
         current.payloadSha256,
-        targetState,
-        currentEstimateBalances,
-        targetEstimateBalances
+        targetState
       ),
     };
   }
@@ -100,39 +78,20 @@ export class ProjectTransferRepository implements ProjectTransferStore {
       () => crypto.randomUUID(),
       `${transfer.projectState.project.name} (Kopie)`
     );
-    const estimateBalances = remapEstimateBalances(
-      transfer.estimateBalances,
-      projectId,
-      () => crypto.randomUUID()
-    );
-    this.database.transaction((tx) => {
-      insertProjectState(tx, state);
-      for (const balance of estimateBalances) {
-        insertEstimateBalance(tx, balance);
-      }
-    });
+    this.database.transaction((tx) => insertProjectState(tx, state));
     return { projectId, name: state.project.name };
   }
 
   private parseVerified(value: unknown) {
-    const isLegacy = isPlainObject(value) && value.formatVersion === 1;
-    const rawPayloadSha256 = isPlainObject(value) && isPlainObject(value.projectState)
-      ? hashProjectStatePayload(
-          isLegacy
-            ? JSON.stringify(value.projectState)
-            : JSON.stringify({
-                projectState: value.projectState,
-                estimateBalances: value.estimateBalances,
-              })
-        )
-      : null;
+    const rawPayloadSha256 =
+      isPlainObject(value) &&
+      isPlainObject(value.projectState)
+        ? hashProjectStatePayload(JSON.stringify(value.projectState))
+        : null;
     const transfer = parseProjectTransferEnvelope(value);
-    const payloadJson = isLegacy
-      ? serializeProjectStateSnapshot(transfer.projectState)
-      : serializeProjectTransferPayload(
-          transfer.projectState,
-          transfer.estimateBalances
-        );
+    const payloadJson = serializeProjectStateSnapshot(
+      transfer.projectState
+    );
     if (
       hashProjectStatePayload(payloadJson) !== transfer.payloadSha256 &&
       rawPayloadSha256 !== transfer.payloadSha256
diff --git a/src/db/schema/estimate-balances.ts b/src/db/schema/estimate-balances.ts
deleted file mode 100644
index 4425a03..0000000
--- a/src/db/schema/estimate-balances.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-import { index, integer, real, sqliteTable, text } from "drizzle-orm/sqlite-core";
-import { projects } from "./projects.js";
-
-// Grobe Leistungsbilanz (LPH 2/3): a separate module without links into the
-// circuit structure. See docs/estimate-balance.md.
-export const estimateBalances = sqliteTable(
-  "estimate_balances",
-  {
-    id: text("id").primaryKey(),
-    projectId: text("project_id")
-      .notNull()
-      .references(() => projects.id, { onDelete: "cascade" }),
-    name: text("name").notNull(),
-    workStage: text("work_stage"),
-    dateIso: text("date_iso"),
-    reserveAvPercent: real("reserve_av_percent").notNull().default(0),
-    reserveSvPercent: real("reserve_sv_percent").notNull().default(0),
-    sortOrder: integer("sort_order").notNull().default(0),
-  },
-  (table) => [index("estimate_balances_project_id_idx").on(table.projectId)]
-);
-
-export const estimateGroups = sqliteTable(
-  "estimate_groups",
-  {
-    id: text("id").primaryKey(),
-    balanceId: text("balance_id")
-      .notNull()
-      .references(() => estimateBalances.id, { onDelete: "cascade" }),
-    costGroup: text("cost_group").notNull().default(""),
-    title: text("title").notNull(),
-    editor: text("editor"),
-    sortOrder: integer("sort_order").notNull().default(0),
-  },
-  (table) => [index("estimate_groups_balance_id_idx").on(table.balanceId)]
-);
-
-export const estimateRows = sqliteTable(
-  "estimate_rows",
-  {
-    id: text("id").primaryKey(),
-    groupId: text("group_id")
-      .notNull()
-      .references(() => estimateGroups.id, { onDelete: "cascade" }),
-    sortOrder: integer("sort_order").notNull().default(0),
-    supply: text("supply"),
-    name: text("name").notNull().default(""),
-    quantity: real("quantity").notNull().default(0),
-    unit: text("unit", { enum: ["piece", "area"] }).notNull().default("piece"),
-    connection: text("connection", { enum: ["fixed", "socket"] }),
-    powerPerUnitW: real("power_per_unit_w").notNull().default(0),
-    simultaneityFactor: real("simultaneity_factor").notNull().default(1),
-    cosPhi: real("cos_phi").notNull().default(1),
-    safetySupply: integer("safety_supply", { mode: "boolean" })
-      .notNull()
-      .default(false),
-    remark: text("remark"),
-  },
-  (table) => [index("estimate_rows_group_id_idx").on(table.groupId)]
-);
diff --git a/src/domain/models/project-state-restore-command.model.ts b/src/domain/models/project-state-restore-command.model.ts
index 83b8405..14b876c 100644
--- a/src/domain/models/project-state-restore-command.model.ts
+++ b/src/domain/models/project-state-restore-command.model.ts
@@ -3,80 +3,32 @@ import {
   type ProjectStateSnapshot,
 } from "./project-state-snapshot.model.js";
 import type { SerializedProjectCommand } from "./project-command.model.js";
-import {
-  parseEstimateBalanceSnapshot,
-} from "../../estimate-balance/domain/estimate-balance-command.model.js";
-import type { EstimateBalanceSnapshot } from "../../shared/estimate-balance/estimate-balance.js";
 
 export const projectStateRestoreCommandType = "project.restore-state";
-export const projectStateRestoreCommandSchemaVersion = 2 as const;
-const snapshotRestoreCommandSchemaVersion = 1 as const;
+export const projectStateRestoreCommandSchemaVersion = 1 as const;
 
 export interface ProjectStateRestoreCommandPayload {
   expectedStateSha256: string;
   targetState: ProjectStateSnapshot;
 }
 
-export type SnapshotProjectStateRestoreCommand = SerializedProjectCommand<
+export type ProjectStateRestoreCommand = SerializedProjectCommand<
   ProjectStateRestoreCommandPayload
-> & {
-  schemaVersion: typeof snapshotRestoreCommandSchemaVersion;
-  type: typeof projectStateRestoreCommandType;
-};
-
-export interface ProjectTransferRestoreCommandPayload
-  extends ProjectStateRestoreCommandPayload {
-  expectedEstimateBalances: EstimateBalanceSnapshot[];
-  targetEstimateBalances: EstimateBalanceSnapshot[];
-}
-
-export type ProjectTransferRestoreCommand = SerializedProjectCommand<
-  ProjectTransferRestoreCommandPayload
 > & {
   schemaVersion: typeof projectStateRestoreCommandSchemaVersion;
   type: typeof projectStateRestoreCommandType;
 };
 
-export type ProjectStateRestoreCommand =
-  | SnapshotProjectStateRestoreCommand
-  | ProjectTransferRestoreCommand;
-
 export function createProjectStateRestoreCommand(
   expectedStateSha256: string,
   targetState: ProjectStateSnapshot
 ): ProjectStateRestoreCommand {
-  const command: SnapshotProjectStateRestoreCommand = {
-    schemaVersion: snapshotRestoreCommandSchemaVersion,
-    type: projectStateRestoreCommandType,
-    payload: {
-      expectedStateSha256,
-      targetState: parseProjectStateSnapshot(targetState),
-    },
-  };
-  assertProjectStateRestoreCommand(command);
-  return command;
-}
-
-export function createProjectTransferRestoreCommand(
-  expectedStateSha256: string,
-  targetState: ProjectStateSnapshot,
-  expectedEstimateBalances: EstimateBalanceSnapshot[],
-  targetEstimateBalances: EstimateBalanceSnapshot[]
-): ProjectTransferRestoreCommand {
-  const command: ProjectTransferRestoreCommand = {
+  const command: ProjectStateRestoreCommand = {
     schemaVersion: projectStateRestoreCommandSchemaVersion,
     type: projectStateRestoreCommandType,
     payload: {
       expectedStateSha256,
       targetState: parseProjectStateSnapshot(targetState),
-      expectedEstimateBalances: parseEstimateBalances(
-        expectedEstimateBalances,
-        targetState.project.id
-      ),
-      targetEstimateBalances: parseEstimateBalances(
-        targetEstimateBalances,
-        targetState.project.id
-      ),
     },
   };
   assertProjectStateRestoreCommand(command);
@@ -90,7 +42,10 @@ export function assertProjectStateRestoreCommand(
     throw new Error("Project state restore command must be an object.");
   }
   const command = value as Partial<ProjectStateRestoreCommand>;
-  if (command.type !== projectStateRestoreCommandType) {
+  if (
+    command.type !== projectStateRestoreCommandType ||
+    command.schemaVersion !== projectStateRestoreCommandSchemaVersion
+  ) {
     throw new Error("Unsupported project state restore command.");
   }
   if (!command.payload || typeof command.payload !== "object") {
@@ -103,43 +58,5 @@ export function assertProjectStateRestoreCommand(
   ) {
     throw new Error("Expected project state checksum is invalid.");
   }
-  const targetState = parseProjectStateSnapshot(payload.targetState);
-  if (command.schemaVersion === snapshotRestoreCommandSchemaVersion) {
-    if (Object.keys(payload).length !== 2) {
-      throw new Error("Snapshot restore payload contains unknown fields.");
-    }
-    return;
-  }
-  if (command.schemaVersion !== projectStateRestoreCommandSchemaVersion) {
-    throw new Error("Unsupported project state restore command.");
-  }
-  const transferPayload = payload as Partial<ProjectTransferRestoreCommandPayload>;
-  parseEstimateBalances(
-    transferPayload.expectedEstimateBalances,
-    targetState.project.id
-  );
-  parseEstimateBalances(
-    transferPayload.targetEstimateBalances,
-    targetState.project.id
-  );
-  if (Object.keys(payload).length !== 4) {
-    throw new Error("Project transfer restore payload contains unknown fields.");
-  }
-}
-
-function parseEstimateBalances(
-  value: unknown,
-  projectId: string
-): EstimateBalanceSnapshot[] {
-  if (!Array.isArray(value)) {
-    throw new Error("Project transfer estimate balances must be an array.");
-  }
-  const balances = value.map(parseEstimateBalanceSnapshot);
-  if (balances.some((balance) => balance.projectId !== projectId)) {
-    throw new Error("Project transfer estimate balance belongs to another project.");
-  }
-  if (new Set(balances.map((balance) => balance.id)).size !== balances.length) {
-    throw new Error("Project transfer contains duplicate estimate balances.");
-  }
-  return balances;
+  parseProjectStateSnapshot(payload.targetState);
 }
diff --git a/src/domain/models/project-transfer.model.ts b/src/domain/models/project-transfer.model.ts
index 80b9d59..24c0a9c 100644
--- a/src/domain/models/project-transfer.model.ts
+++ b/src/domain/models/project-transfer.model.ts
@@ -3,12 +3,9 @@ import {
   projectStateSnapshotSchemaVersion,
   type ProjectStateSnapshot,
 } from "./project-state-snapshot.model.js";
-import { parseEstimateBalanceSnapshot } from "../../estimate-balance/domain/estimate-balance-command.model.js";
-import type { EstimateBalanceSnapshot } from "../../shared/estimate-balance/estimate-balance.js";
 
 export const projectTransferFormat = "leistungsbilanz.project" as const;
-export const projectTransferFormatVersion = 2 as const;
-const legacyProjectTransferFormatVersion = 1 as const;
+export const projectTransferFormatVersion = 1 as const;
 
 export interface ProjectTransferEnvelope {
   format: typeof projectTransferFormat;
@@ -16,14 +13,12 @@ export interface ProjectTransferEnvelope {
   exportedAtIso: string;
   payloadSha256: string;
   projectState: ProjectStateSnapshot;
-  estimateBalances: EstimateBalanceSnapshot[];
 }
 
 export function createProjectTransferEnvelope(
   exportedAtIso: string,
   payloadSha256: string,
-  projectState: ProjectStateSnapshot,
-  estimateBalances: EstimateBalanceSnapshot[]
+  projectState: ProjectStateSnapshot
 ): ProjectTransferEnvelope {
   return parseProjectTransferEnvelope({
     format: projectTransferFormat,
@@ -31,7 +26,6 @@ export function createProjectTransferEnvelope(
     exportedAtIso,
     payloadSha256,
     projectState,
-    estimateBalances,
   });
 }
 
@@ -43,8 +37,7 @@ export function parseProjectTransferEnvelope(
   }
   if (
     value.format !== projectTransferFormat ||
-    (value.formatVersion !== legacyProjectTransferFormatVersion &&
-      value.formatVersion !== projectTransferFormatVersion)
+    value.formatVersion !== projectTransferFormatVersion
   ) {
     throw new Error("Project transfer format is not supported.");
   }
@@ -64,13 +57,7 @@ export function parseProjectTransferEnvelope(
   if (projectState.schemaVersion !== projectStateSnapshotSchemaVersion) {
     throw new Error("Project transfer snapshot version is not supported.");
   }
-  const estimateBalances =
-    value.formatVersion === legacyProjectTransferFormatVersion
-      ? []
-      : parseTransferEstimateBalances(value.estimateBalances, projectState.project.id);
-  const expectedFieldCount =
-    value.formatVersion === legacyProjectTransferFormatVersion ? 5 : 6;
-  if (Object.keys(value).length !== expectedFieldCount) {
+  if (Object.keys(value).length !== 5) {
     throw new Error("Project transfer file contains unknown fields.");
   }
   return {
@@ -79,43 +66,9 @@ export function parseProjectTransferEnvelope(
     exportedAtIso: value.exportedAtIso,
     payloadSha256: value.payloadSha256,
     projectState,
-    estimateBalances,
   };
 }
 
-export function serializeProjectTransferPayload(
-  projectState: ProjectStateSnapshot,
-  estimateBalances: EstimateBalanceSnapshot[]
-) {
-  const parsedState = parseProjectStateSnapshot(projectState);
-  return JSON.stringify({
-    projectState: parsedState,
-    estimateBalances: parseTransferEstimateBalances(
-      estimateBalances,
-      parsedState.project.id
-    ),
-  });
-}
-
-export function remapEstimateBalances(
-  source: EstimateBalanceSnapshot[],
-  targetProjectId: string,
-  createId: () => string
-): EstimateBalanceSnapshot[] {
-  return source.map((balance) =>
-    parseEstimateBalanceSnapshot({
-      ...balance,
-      id: createId(),
-      projectId: targetProjectId,
-      groups: balance.groups.map((group) => ({
-        ...group,
-        id: createId(),
-        rows: group.rows.map((row) => ({ ...row, id: createId() })),
-      })),
-    })
-  );
-}
-
 export function remapProjectState(
   source: ProjectStateSnapshot,
   targetProjectId: string,
@@ -329,37 +282,6 @@ function requiredId(ids: ReadonlyMap<string, string>, sourceId: string) {
   return targetId;
 }
 
-function parseTransferEstimateBalances(
-  value: unknown,
-  projectId: string
-): EstimateBalanceSnapshot[] {
-  if (!Array.isArray(value)) {
-    throw new Error("Project transfer estimate balances must be an array.");
-  }
-  const balances = value.map(parseEstimateBalanceSnapshot);
-  if (balances.some((balance) => balance.projectId !== projectId)) {
-    throw new Error("Project transfer estimate balance belongs to another project.");
-  }
-  assertUniqueIds(balances.map((balance) => balance.id), "estimate balance");
-  assertUniqueIds(
-    balances.flatMap((balance) => balance.groups.map((group) => group.id)),
-    "estimate group"
-  );
-  assertUniqueIds(
-    balances.flatMap((balance) =>
-      balance.groups.flatMap((group) => group.rows.map((row) => row.id))
-    ),
-    "estimate row"
-  );
-  return balances;
-}
-
-function assertUniqueIds(ids: string[], label: string) {
-  if (new Set(ids).size !== ids.length) {
-    throw new Error(`Project transfer contains a duplicate ${label} id.`);
-  }
-}
-
 function isPlainObject(value: unknown): value is Record<string, unknown> {
   return value !== null && typeof value === "object" && !Array.isArray(value);
 }
diff --git a/src/domain/services/project-command.service.ts b/src/domain/services/project-command.service.ts
index cf1f740..91ee754 100644
--- a/src/domain/services/project-command.service.ts
+++ b/src/domain/services/project-command.service.ts
@@ -194,15 +194,6 @@ import {
   externalObjectDeleteCreatedCircuitCommandType,
 } from "../models/external-object-new-circuit-project-command.model.js";
 import type { ExternalObjectNewCircuitProjectCommandStore } from "../ports/external-object-new-circuit-project-command.store.js";
-import {
-  assertEstimateBalanceDeleteProjectCommand,
-  assertEstimateBalanceInsertProjectCommand,
-  assertEstimateBalanceUpdateProjectCommand,
-  estimateBalanceDeleteCommandType,
-  estimateBalanceInsertCommandType,
-  estimateBalanceUpdateCommandType,
-} from "../../estimate-balance/domain/estimate-balance-command.model.js";
-import type { EstimateBalanceProjectCommandStore } from "../../estimate-balance/domain/estimate-balance-project-command.store.js";
 
 interface DispatchProjectCommandInput {
   projectId: string;
@@ -242,8 +233,7 @@ export class ProjectCommandService implements ProjectCommandExecutor {
     private readonly externalInitialImportStore?: ExternalInitialImportProjectCommandStore,
     private readonly externalObjectRowAssignmentStore?: ExternalObjectRowAssignmentProjectCommandStore,
     private readonly externalObjectNewRowStore?: ExternalObjectNewRowProjectCommandStore,
-    private readonly externalObjectNewCircuitStore?: ExternalObjectNewCircuitProjectCommandStore,
-    private readonly estimateBalanceStore?: EstimateBalanceProjectCommandStore
+    private readonly externalObjectNewCircuitStore?: ExternalObjectNewCircuitProjectCommandStore
   ) {}
 
   executeUser(
@@ -664,24 +654,6 @@ export class ProjectCommandService implements ProjectCommandExecutor {
           command: input.command,
         }).revision;
       }
-      case estimateBalanceInsertCommandType:
-      case estimateBalanceDeleteCommandType:
-      case estimateBalanceUpdateCommandType: {
-        if (input.command.type === estimateBalanceInsertCommandType) {
-          assertEstimateBalanceInsertProjectCommand(input.command);
-        } else if (input.command.type === estimateBalanceDeleteCommandType) {
-          assertEstimateBalanceDeleteProjectCommand(input.command);
-        } else {
-          assertEstimateBalanceUpdateProjectCommand(input.command);
-        }
-        if (!this.estimateBalanceStore) {
-          throw new Error("Estimate-balance store is not available.");
-        }
-        return this.estimateBalanceStore.execute({
-          ...input,
-          command: input.command,
-        }).revision;
-      }
       case projectStateRestoreCommandType: {
         assertProjectStateRestoreCommand(input.command);
         return this.projectStateRestoreStore.execute({
diff --git a/src/estimate-balance/api/estimate-balance-request.schemas.ts b/src/estimate-balance/api/estimate-balance-request.schemas.ts
deleted file mode 100644
index d1f1a5f..0000000
--- a/src/estimate-balance/api/estimate-balance-request.schemas.ts
+++ /dev/null
@@ -1,33 +0,0 @@
-import { z } from "zod";
-import { expectedProjectRevisionSchema } from "../../shared/validation/project-command.schemas.js";
-
-export const createEstimateBalanceRequestSchema = z
-  .object({
-    expectedRevision: expectedProjectRevisionSchema,
-    name: z.string().trim().min(1).max(200),
-    workStage: z.string().trim().max(50).nullable().optional(),
-    dateIso: z
-      .string()
-      .regex(/^\d{4}-\d{2}-\d{2}$/)
-      .nullable()
-      .optional(),
-    template: z.enum(["kg400", "empty", "copy"]),
-    copyFromBalanceId: z.string().trim().min(1).optional(),
-  })
-  .strict()
-  .refine((input) => input.template !== "copy" || Boolean(input.copyFromBalanceId), {
-    message: "copyFromBalanceId is required for template copy",
-    path: ["copyFromBalanceId"],
-  });
-
-export const updateEstimateBalanceRequestSchema = z
-  .object({
-    expectedRevision: expectedProjectRevisionSchema,
-    // Validated in detail by parseEstimateBalanceSnapshot.
-    balance: z.unknown(),
-  })
-  .strict();
-
-export const deleteEstimateBalanceRequestSchema = z
-  .object({ expectedRevision: expectedProjectRevisionSchema })
-  .strict();
diff --git a/src/estimate-balance/domain/estimate-balance-command.model.ts b/src/estimate-balance/domain/estimate-balance-command.model.ts
deleted file mode 100644
index f1b0da8..0000000
--- a/src/estimate-balance/domain/estimate-balance-command.model.ts
+++ /dev/null
@@ -1,318 +0,0 @@
-import crypto from "node:crypto";
-import { z } from "zod";
-import type { SerializedProjectCommand } from "../../domain/models/project-command.model.js";
-import {
-  estimateDefaultGroups,
-  type EstimateBalanceSnapshot,
-  type EstimateGroupSnapshot,
-} from "../../shared/estimate-balance/estimate-balance.js";
-
-export const estimateBalanceInsertCommandType = "estimate-balance.insert" as const;
-export const estimateBalanceDeleteCommandType = "estimate-balance.delete" as const;
-export const estimateBalanceUpdateCommandType = "estimate-balance.update" as const;
-export const estimateBalanceCommandSchemaVersion = 1 as const;
-
-const idSchema = z.string().trim().min(1).max(100);
-const trimmed = (max: number) =>
-  z.string().max(max).refine((value) => value === value.trim(), {
-    message: "must be trimmed",
-  });
-const nullableText = (max: number) =>
-  trimmed(max)
-    .refine((value) => value.length > 0, { message: "use null instead of empty" })
-    .nullable();
-const finite = z.number().finite();
-
-export const estimateRowSnapshotSchema = z
-  .object({
-    id: idSchema,
-    sortOrder: z.number().int().min(0),
-    supply: nullableText(50),
-    name: trimmed(200),
-    quantity: finite.min(0),
-    unit: z.enum(["piece", "area"]),
-    connection: z.enum(["fixed", "socket"]).nullable(),
-    powerPerUnitW: finite.min(0),
-    simultaneityFactor: finite.min(0).max(1),
-    cosPhi: finite.gt(0).max(1),
-    safetySupply: z.boolean(),
-    remark: nullableText(500),
-  })
-  .strict();
-
-export const estimateGroupSnapshotSchema = z
-  .object({
-    id: idSchema,
-    costGroup: trimmed(20),
-    title: trimmed(200).refine((value) => value.length > 0, {
-      message: "title must not be empty",
-    }),
-    editor: nullableText(100),
-    sortOrder: z.number().int().min(0),
-    rows: z.array(estimateRowSnapshotSchema).max(1000),
-  })
-  .strict();
-
-export const estimateBalanceSnapshotSchema = z
-  .object({
-    id: idSchema,
-    projectId: idSchema,
-    name: trimmed(200).refine((value) => value.length > 0, {
-      message: "name must not be empty",
-    }),
-    workStage: nullableText(50),
-    dateIso: z
-      .string()
-      .regex(/^\d{4}-\d{2}-\d{2}$/)
-      .refine((value) => !Number.isNaN(Date.parse(`${value}T00:00:00Z`)), {
-        message: "invalid date",
-      })
-      .nullable(),
-    reserveAvPercent: finite.min(0).max(100),
-    reserveSvPercent: finite.min(0).max(100),
-    sortOrder: z.number().int().min(0),
-    groups: z.array(estimateGroupSnapshotSchema).max(200),
-  })
-  .strict()
-  .superRefine((balance, context) => {
-    const ids = new Set<string>();
-    for (const group of balance.groups) {
-      for (const id of [group.id, ...group.rows.map((row) => row.id)]) {
-        if (ids.has(id)) {
-          context.addIssue({
-            code: "custom",
-            message: `duplicate id ${id}`,
-            path: ["groups"],
-          });
-        }
-        ids.add(id);
-      }
-    }
-  });
-
-export interface EstimateBalanceInsertProjectCommand
-  extends SerializedProjectCommand<{ balance: EstimateBalanceSnapshot }> {
-  schemaVersion: typeof estimateBalanceCommandSchemaVersion;
-  type: typeof estimateBalanceInsertCommandType;
-}
-
-export interface EstimateBalanceDeleteProjectCommand
-  extends SerializedProjectCommand<{ balance: EstimateBalanceSnapshot }> {
-  schemaVersion: typeof estimateBalanceCommandSchemaVersion;
-  type: typeof estimateBalanceDeleteCommandType;
-}
-
-export interface EstimateBalanceUpdateProjectCommand
-  extends SerializedProjectCommand<{
-    expected: EstimateBalanceSnapshot;
-    target: EstimateBalanceSnapshot;
-  }> {
-  schemaVersion: typeof estimateBalanceCommandSchemaVersion;
-  type: typeof estimateBalanceUpdateCommandType;
-}
-
-export type EstimateBalanceProjectCommand =
-  | EstimateBalanceInsertProjectCommand
-  | EstimateBalanceDeleteProjectCommand
-  | EstimateBalanceUpdateProjectCommand;
-
-/** Parses and normalizes a snapshot (sort orders of groups and rows follow the array order). */
-export function parseEstimateBalanceSnapshot(value: unknown): EstimateBalanceSnapshot {
-  const parsed = estimateBalanceSnapshotSchema.parse(value);
-  return normalizeEstimateBalanceSnapshot(parsed);
-}
-
-export function normalizeEstimateBalanceSnapshot(
-  balance: EstimateBalanceSnapshot
-): EstimateBalanceSnapshot {
-  return {
-    ...balance,
-    groups: balance.groups.map((group, groupIndex) => ({
-      ...group,
-      sortOrder: groupIndex,
-      rows: group.rows.map((row, rowIndex) => ({ ...row, sortOrder: rowIndex })),
-    })),
-  };
-}
-
-/** Stable JSON for exact equality checks of two snapshots. */
-export function canonicalEstimateBalance(balance: EstimateBalanceSnapshot): string {
-  const normalized = normalizeEstimateBalanceSnapshot(balance);
-  return JSON.stringify({
-    id: normalized.id,
-    projectId: normalized.projectId,
-    name: normalized.name,
-    workStage: normalized.workStage,
-    dateIso: normalized.dateIso,
-    reserveAvPercent: normalized.reserveAvPercent,
-    reserveSvPercent: normalized.reserveSvPercent,
-    sortOrder: normalized.sortOrder,
-    groups: normalized.groups.map((group) => ({
-      id: group.id,
-      costGroup: group.costGroup,
-      title: group.title,
-      editor: group.editor,
-      sortOrder: group.sortOrder,
-      rows: group.rows.map((row) => ({
-        id: row.id,
-        sortOrder: row.sortOrder,
-        supply: row.supply,
-        name: row.name,
-        quantity: row.quantity,
-        unit: row.unit,
-        connection: row.connection,
-        powerPerUnitW: row.powerPerUnitW,
-        simultaneityFactor: row.simultaneityFactor,
-        cosPhi: row.cosPhi,
-        safetySupply: row.safetySupply,
-        remark: row.remark,
-      })),
-    })),
-  });
-}
-
-export function sameEstimateBalance(
-  left: EstimateBalanceSnapshot,
-  right: EstimateBalanceSnapshot
-): boolean {
-  return canonicalEstimateBalance(left) === canonicalEstimateBalance(right);
-}
-
-export function createEstimateBalanceSnapshot(input: {
-  projectId: string;
-  name: string;
-  workStage: string | null;
-  dateIso: string | null;
-  sortOrder: number;
-  template: "kg400" | "empty" | { copyFrom: EstimateBalanceSnapshot };
-  createId?: () => string;
-}): EstimateBalanceSnapshot {
-  const createId = input.createId ?? (() => crypto.randomUUID());
-  let groups: EstimateGroupSnapshot[] = [];
-  let reserveAvPercent = 10;
-  let reserveSvPercent = 0;
-  if (input.template === "kg400") {
-    groups = estimateDefaultGroups.map((group, index) => ({
-      id: createId(),
-      costGroup: group.costGroup,
-      title: group.title,
-      editor: null,
-      sortOrder: index,
-      rows: [],
-    }));
-  } else if (input.template !== "empty") {
-    const source = input.template.copyFrom;
-    reserveAvPercent = source.reserveAvPercent;
-    reserveSvPercent = source.reserveSvPercent;
-    groups = source.groups.map((group) => ({
-      ...group,
-      id: createId(),
-      rows: group.rows.map((row) => ({ ...row, id: createId() })),
-    }));
-  }
-  return parseEstimateBalanceSnapshot({
-    id: createId(),
-    projectId: input.projectId,
-    name: input.name.trim(),
-    workStage: input.workStage?.trim() || null,
-    dateIso: input.dateIso || null,
-    reserveAvPercent,
-    reserveSvPercent,
-    sortOrder: input.sortOrder,
-    groups,
-  });
-}
-
-export function createEstimateBalanceInsertProjectCommand(
-  balance: EstimateBalanceSnapshot
-): EstimateBalanceInsertProjectCommand {
-  return {
-    schemaVersion: estimateBalanceCommandSchemaVersion,
-    type: estimateBalanceInsertCommandType,
-    payload: { balance: parseEstimateBalanceSnapshot(balance) },
-  };
-}
-
-export function createEstimateBalanceDeleteProjectCommand(
-  balance: EstimateBalanceSnapshot
-): EstimateBalanceDeleteProjectCommand {
-  return {
-    schemaVersion: estimateBalanceCommandSchemaVersion,
-    type: estimateBalanceDeleteCommandType,
-    payload: { balance: parseEstimateBalanceSnapshot(balance) },
-  };
-}
-
-export function createEstimateBalanceUpdateProjectCommand(
-  expected: EstimateBalanceSnapshot,
-  target: EstimateBalanceSnapshot
-): EstimateBalanceUpdateProjectCommand {
-  const payload = {
-    expected: parseEstimateBalanceSnapshot(expected),
-    target: parseEstimateBalanceSnapshot(target),
-  };
-  assertMatchingUpdate(payload.expected, payload.target);
-  return {
-    schemaVersion: estimateBalanceCommandSchemaVersion,
-    type: estimateBalanceUpdateCommandType,
-    payload,
-  };
-}
-
-function assertMatchingUpdate(
-  expected: EstimateBalanceSnapshot,
-  target: EstimateBalanceSnapshot
-) {
-  if (expected.id !== target.id || expected.projectId !== target.projectId) {
-    throw new Error("Estimate-balance update must keep id and project.");
-  }
-  if (sameEstimateBalance(expected, target)) {
-    throw new Error("Estimate-balance update must change the balance.");
-  }
-}
-
-function assertCommandShape(
-  command: SerializedProjectCommand<unknown>,
-  type: string,
-  keys: string[]
-): Record<string, unknown> {
-  const payload = command.payload;
-  if (
-    command.schemaVersion !== estimateBalanceCommandSchemaVersion ||
-    command.type !== type ||
-    payload === null ||
-    typeof payload !== "object" ||
-    Array.isArray(payload) ||
-    Object.keys(payload).sort().join(",") !== [...keys].sort().join(",")
-  ) {
-    throw new Error("Unsupported estimate-balance command.");
-  }
-  return payload as Record<string, unknown>;
-}
-
-export function assertEstimateBalanceInsertProjectCommand(
-  command: SerializedProjectCommand<unknown>
-): asserts command is EstimateBalanceInsertProjectCommand {
-  const payload = assertCommandShape(command, estimateBalanceInsertCommandType, ["balance"]);
-  parseEstimateBalanceSnapshot(payload.balance);
-}
-
-export function assertEstimateBalanceDeleteProjectCommand(
-  command: SerializedProjectCommand<unknown>
-): asserts command is EstimateBalanceDeleteProjectCommand {
-  const payload = assertCommandShape(command, estimateBalanceDeleteCommandType, ["balance"]);
-  parseEstimateBalanceSnapshot(payload.balance);
-}
-
-export function assertEstimateBalanceUpdateProjectCommand(
-  command: SerializedProjectCommand<unknown>
-): asserts command is EstimateBalanceUpdateProjectCommand {
-  const payload = assertCommandShape(command, estimateBalanceUpdateCommandType, [
-    "expected",
-    "target",
-  ]);
-  assertMatchingUpdate(
-    parseEstimateBalanceSnapshot(payload.expected),
-    parseEstimateBalanceSnapshot(payload.target)
-  );
-}
diff --git a/src/estimate-balance/domain/estimate-balance-project-command.store.ts b/src/estimate-balance/domain/estimate-balance-project-command.store.ts
deleted file mode 100644
index e5f7e04..0000000
--- a/src/estimate-balance/domain/estimate-balance-project-command.store.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-import type {
-  AppendedProjectRevision,
-  ProjectRevisionSource,
-} from "../../domain/ports/project-revision.store.js";
-import type { EstimateBalanceProjectCommand } from "./estimate-balance-command.model.js";
-
-export interface ExecuteEstimateBalanceCommandInput {
-  projectId: string;
-  expectedRevision: number;
-  source: ProjectRevisionSource;
-  description?: string;
-  actorId?: string;
-  historyTargetChangeSetId?: string;
-  command: EstimateBalanceProjectCommand;
-}
-
-export interface ExecutedEstimateBalanceCommand {
-  revision: AppendedProjectRevision;
-  inverse: EstimateBalanceProjectCommand;
-}
-
-export interface EstimateBalanceProjectCommandStore {
-  execute(input: ExecuteEstimateBalanceCommandInput): ExecutedEstimateBalanceCommand;
-}
diff --git a/src/frontend/components/Sidebar.tsx b/src/frontend/components/Sidebar.tsx
index 395cd7c..a94378e 100644
--- a/src/frontend/components/Sidebar.tsx
+++ b/src/frontend/components/Sidebar.tsx
@@ -17,7 +17,6 @@ const PROJECT_SECTIONS = [
 // Separate project sub-routes (/projects/[id]/<segment>).
 const PROJECT_ROUTES = [
   { segment: "struktur", label: "Gebäudestruktur", icon: "▥" },
-  { segment: "grobbilanz", label: "Grobe Leistungsbilanz", icon: "Σ" },
 ] as const;
 
 // Matches the project overview and all of its sub-routes (group 2 = rest).
diff --git a/src/frontend/estimate-balance/estimate-balance-create-modal.tsx b/src/frontend/estimate-balance/estimate-balance-create-modal.tsx
deleted file mode 100644
index 6d8f123..0000000
--- a/src/frontend/estimate-balance/estimate-balance-create-modal.tsx
+++ /dev/null
@@ -1,162 +0,0 @@
-"use client";
-
-import { type FormEvent, useState } from "react";
-import { FormModal } from "../components/form-modal";
-import type {
-  CreateEstimateBalanceInput,
-  EstimateBalanceDto,
-  EstimateBalanceTemplate,
-} from "../types";
-import { estimateTextLimits } from "./estimate-balance-document";
-import { getTodayIsoDate } from "./estimate-balance-format";
-
-export interface EstimateBalanceCreateDefaults {
-  name?: string;
-  workStage?: string | null;
-  template?: EstimateBalanceTemplate;
-  copyFromBalanceId?: string;
-}
-
-interface EstimateBalanceCreateModalProps {
-  balances: EstimateBalanceDto[];
-  defaults: EstimateBalanceCreateDefaults;
-  isSaving: boolean;
-  onClose: () => void;
-  onCreate: (input: CreateEstimateBalanceInput) => void;
-}
-
-/** "Neuer Stand": name, LPH, date and the starting content. */
-export function EstimateBalanceCreateModal({
-  balances,
-  defaults,
-  isSaving,
-  onClose,
-  onCreate,
-}: EstimateBalanceCreateModalProps) {
-  const [name, setName] = useState(defaults.name ?? "");
-  const [workStage, setWorkStage] = useState(defaults.workStage ?? "");
-  const [dateIso, setDateIso] = useState(getTodayIsoDate());
-  const [template, setTemplate] = useState<EstimateBalanceTemplate>(
-    defaults.template ?? "kg400"
-  );
-  const [copyFromBalanceId, setCopyFromBalanceId] = useState(
-    defaults.copyFromBalanceId ?? balances[0]?.id ?? ""
-  );
-  const isCopyInvalid = template === "copy" && !copyFromBalanceId;
-
-  function handleSubmit(event: FormEvent<HTMLFormElement>) {
-    event.preventDefault();
-    if (!name.trim() || isCopyInvalid) {
-      return;
-    }
-    onCreate({
-      name: name.trim(),
-      workStage: workStage.trim() || null,
-      dateIso: dateIso || null,
-      template,
-      ...(template === "copy" ? { copyFromBalanceId } : {}),
-    });
-  }
-
-  return (
-    <FormModal
-      isSaving={isSaving}
-      onClose={onClose}
-      onSubmit={handleSubmit}
-      submitDisabled={!name.trim() || isCopyInvalid}
-      submitLabel="Stand anlegen"
-      title="Neuer Stand"
-    >
-      <div className="row g-3">
-        <div className="col-12 col-md-6">
-          <label className="form-label" htmlFor="estimate-create-name">
-            Bezeichnung
-          </label>
-          <input
-            autoFocus
-            className="form-control"
-            id="estimate-create-name"
-            maxLength={estimateTextLimits.balanceName}
-            onChange={(event) => setName(event.target.value)}
-            placeholder="z. B. Entwurfsplanung"
-            required
-            value={name}
-          />
-        </div>
-        <div className="col-6 col-md-3">
-          <label className="form-label" htmlFor="estimate-create-work-stage">
-            LPH
-          </label>
-          <input
-            className="form-control"
-            id="estimate-create-work-stage"
-            maxLength={estimateTextLimits.workStage}
-            onChange={(event) => setWorkStage(event.target.value)}
-            placeholder="z. B. LPH 3"
-            value={workStage}
-          />
-        </div>
-        <div className="col-6 col-md-3">
-          <label className="form-label" htmlFor="estimate-create-date">
-            Datum
-          </label>
-          <input
-            className="form-control"
-            id="estimate-create-date"
-            onChange={(event) => setDateIso(event.target.value)}
-            type="date"
-            value={dateIso}
-          />
-        </div>
-        <div className="col-12 col-md-6">
-          <label className="form-label" htmlFor="estimate-create-template">
-            Inhalt
-          </label>
-          <select
-            className="form-select"
-            id="estimate-create-template"
-            onChange={(event) =>
-              setTemplate(event.target.value as EstimateBalanceTemplate)
-            }
-            value={template}
-          >
-            <option value="kg400">Vorlage KG 400</option>
-            <option value="empty">Leer</option>
-            <option disabled={!balances.length} value="copy">
-              Kopie von …
-            </option>
-          </select>
-        </div>
-        {template === "copy" ? (
-          <div className="col-12 col-md-6">
-            <label className="form-label" htmlFor="estimate-create-copy-from">
-              Kopie von Stand
-            </label>
-            <select
-              className="form-select"
-              id="estimate-create-copy-from"
-              onChange={(event) => setCopyFromBalanceId(event.target.value)}
-              required
-              value={copyFromBalanceId}
-            >
-              {balances.map((balance) => (
-                <option key={balance.id} value={balance.id}>
-                  {balance.workStage ? `${balance.name} (${balance.workStage})` : balance.name}
-                </option>
-              ))}
-            </select>
-          </div>
-        ) : null}
-        <div className="col-12">
-          <p className="text-secondary small mb-0">
-            {template === "kg400"
-              ? "Legt die Kostengruppen 410 bis 480 und „Allgemein“ ohne Einträge an."
-              : template === "empty"
-                ? "Legt einen Stand ohne Kostengruppen an."
-                : "Übernimmt alle Kostengruppen und Zeilen des gewählten Stands."}
-          </p>
-        </div>
-      </div>
-    </FormModal>
-  );
-}
diff --git a/src/frontend/estimate-balance/estimate-balance-document.ts b/src/frontend/estimate-balance/estimate-balance-document.ts
deleted file mode 100644
index e2726d1..0000000
--- a/src/frontend/estimate-balance/estimate-balance-document.ts
+++ /dev/null
@@ -1,298 +0,0 @@
-// Pure, immutable editing rules for one "Grobe Leistungsbilanz" document.
-// The editor keeps the complete document as local draft and saves it as a
-// whole (PUT), so every edit is a function draft → new draft.
-import type {
-  EstimateBalanceSnapshot,
-  EstimateGroupSnapshot,
-  EstimateRowSnapshot,
-} from "../../shared/estimate-balance/estimate-balance";
-import { createClientId } from "../utils/client-id";
-
-export type MoveDirection = -1 | 1;
-
-/** Maximum text lengths accepted by the server. */
-export const estimateTextLimits = {
-  balanceName: 200,
-  workStage: 50,
-  costGroup: 20,
-  groupTitle: 200,
-  groupEditor: 100,
-  supply: 50,
-  rowName: 200,
-  remark: 500,
-} as const;
-
-export type EstimateRowPatch = Partial<Omit<EstimateRowSnapshot, "id" | "sortOrder">>;
-export type EstimateGroupPatch = Partial<Pick<EstimateGroupSnapshot, "costGroup" | "title" | "editor">>;
-
-export function createEstimateRow(
-  sortOrder: number,
-  createId: () => string = createClientId
-): EstimateRowSnapshot {
-  return {
-    id: createId(),
-    sortOrder,
-    supply: null,
-    name: "",
-    quantity: 1,
-    unit: "piece",
-    connection: null,
-    powerPerUnitW: 0,
-    simultaneityFactor: 1,
-    cosPhi: 1,
-    safetySupply: false,
-    remark: null,
-  };
-}
-
-export function createEstimateGroup(
-  input: { costGroup: string; title: string; editor?: string | null },
-  sortOrder: number,
-  createId: () => string = createClientId
-): EstimateGroupSnapshot {
-  return {
-    id: createId(),
-    costGroup: input.costGroup,
-    title: input.title,
-    editor: input.editor ?? null,
-    sortOrder,
-    rows: [],
-  };
-}
-
-function bySortOrder<T extends { sortOrder: number }>(left: T, right: T) {
-  return left.sortOrder - right.sortOrder;
-}
-
-/** Orders groups and rows by sortOrder and renumbers both from 0. */
-export function normalizeEstimateSortOrder(
-  balance: EstimateBalanceSnapshot
-): EstimateBalanceSnapshot {
-  return {
-    ...balance,
-    groups: [...balance.groups].sort(bySortOrder).map((group, groupIndex) => ({
-      ...group,
-      sortOrder: groupIndex,
-      rows: [...group.rows].sort(bySortOrder).map((row, rowIndex) => ({
-        ...row,
-        sortOrder: rowIndex,
-      })),
-    })),
-  };
-}
-
-function renumber<T extends { sortOrder: number }>(items: T[]): T[] {
-  return items.map((item, index) =>
-    item.sortOrder === index ? item : { ...item, sortOrder: index }
-  );
-}
-
-function mapGroup(
-  balance: EstimateBalanceSnapshot,
-  groupId: string,
-  update: (group: EstimateGroupSnapshot) => EstimateGroupSnapshot
-): EstimateBalanceSnapshot {
-  let changed = false;
-  const groups = balance.groups.map((group) => {
-    if (group.id !== groupId) {
-      return group;
-    }
-    const next = update(group);
-    changed = next !== group;
-    return next;
-  });
-  // An unknown group or a no-op keeps the identical document.
-  return changed ? { ...balance, groups } : balance;
-}
-
-function moveItem<T>(items: T[], index: number, direction: MoveDirection): T[] | null {
-  const target = index + direction;
-  if (index < 0 || target < 0 || target >= items.length) {
-    return null;
-  }
-  const next = [...items];
-  [next[index], next[target]] = [next[target]!, next[index]!];
-  return next;
-}
-
-/** Appends a row (or inserts it after `afterRowId`) and returns the new row id. */
-export function addEstimateRow(
-  balance: EstimateBalanceSnapshot,
-  groupId: string,
-  options: { afterRowId?: string; createId?: () => string } = {}
-): { balance: EstimateBalanceSnapshot; rowId: string | null } {
-  let rowId: string | null = null;
-  const next = mapGroup(balance, groupId, (group) => {
-    const row = createEstimateRow(0, options.createId);
-    rowId = row.id;
-    const afterIndex = options.afterRowId
-      ? group.rows.findIndex((candidate) => candidate.id === options.afterRowId)
-      : -1;
-    const rows = [...group.rows];
-    rows.splice(afterIndex >= 0 ? afterIndex + 1 : rows.length, 0, row);
-    return { ...group, rows: renumber(rows) };
-  });
-  return { balance: next, rowId };
-}
-
-export function updateEstimateRow(
-  balance: EstimateBalanceSnapshot,
-  groupId: string,
-  rowId: string,
-  patch: EstimateRowPatch
-): EstimateBalanceSnapshot {
-  return mapGroup(balance, groupId, (group) => ({
-    ...group,
-    rows: group.rows.map((row) => (row.id === rowId ? { ...row, ...patch } : row)),
-  }));
-}
-
-export function removeEstimateRow(
-  balance: EstimateBalanceSnapshot,
-  groupId: string,
-  rowId: string
-): EstimateBalanceSnapshot {
-  return mapGroup(balance, groupId, (group) => ({
-    ...group,
-    rows: renumber(group.rows.filter((row) => row.id !== rowId)),
-  }));
-}
-
-export function moveEstimateRow(
-  balance: EstimateBalanceSnapshot,
-  groupId: string,
-  rowId: string,
-  direction: MoveDirection
-): EstimateBalanceSnapshot {
-  return mapGroup(balance, groupId, (group) => {
-    const rows = moveItem(
-      group.rows,
-      group.rows.findIndex((row) => row.id === rowId),
-      direction
-    );
-    return rows ? { ...group, rows: renumber(rows) } : group;
-  });
-}
-
-/** Appends a group and returns its id. */
-export function addEstimateGroup(
-  balance: EstimateBalanceSnapshot,
-  input: { costGroup: string; title: string; editor?: string | null },
-  createId: () => string = createClientId
-): { balance: EstimateBalanceSnapshot; groupId: string } {
-  const group = createEstimateGroup(input, balance.groups.length, createId);
-  return {
-    balance: { ...balance, groups: renumber([...balance.groups, group]) },
-    groupId: group.id,
-  };
-}
-
-export function updateEstimateGroup(
-  balance: EstimateBalanceSnapshot,
-  groupId: string,
-  patch: EstimateGroupPatch
-): EstimateBalanceSnapshot {
-  return mapGroup(balance, groupId, (group) => ({ ...group, ...patch }));
-}
-
-export function removeEstimateGroup(
-  balance: EstimateBalanceSnapshot,
-  groupId: string
-): EstimateBalanceSnapshot {
-  const groups = balance.groups.filter((group) => group.id !== groupId);
-  return groups.length === balance.groups.length
-    ? balance
-    : { ...balance, groups: renumber(groups) };
-}
-
-export function moveEstimateGroup(
-  balance: EstimateBalanceSnapshot,
-  groupId: string,
-  direction: MoveDirection
-): EstimateBalanceSnapshot {
-  const groups = moveItem(
-    balance.groups,
-    balance.groups.findIndex((group) => group.id === groupId),
-    direction
-  );
-  return groups ? { ...balance, groups: renumber(groups) } : balance;
-}
-
-function requiredText(value: string) {
-  return value.trim();
-}
-
-function optionalText(value: string | null) {
-  const trimmed = value?.trim() ?? "";
-  return trimmed ? trimmed : null;
-}
-
-/**
- * The exact document the server accepts: strings trimmed, empty optional
- * texts as null, sort orders continuous. Only fields of the shared snapshot
- * type are copied, so no UI state can leak into the request.
- */
-export function toSaveableEstimateBalance(
-  balance: EstimateBalanceSnapshot
-): EstimateBalanceSnapshot {
-  const normalized = normalizeEstimateSortOrder(balance);
-  return {
-    id: normalized.id,
-    projectId: normalized.projectId,
-    name: requiredText(normalized.name),
-    workStage: optionalText(normalized.workStage),
-    dateIso: normalized.dateIso || null,
-    reserveAvPercent: normalized.reserveAvPercent,
-    reserveSvPercent: normalized.reserveSvPercent,
-    sortOrder: normalized.sortOrder,
-    groups: normalized.groups.map((group) => ({
-      id: group.id,
-      costGroup: requiredText(group.costGroup),
-      title: requiredText(group.title),
-      editor: optionalText(group.editor),
-      sortOrder: group.sortOrder,
-      rows: group.rows.map((row) => ({
-        id: row.id,
-        sortOrder: row.sortOrder,
-        supply: optionalText(row.supply),
-        name: requiredText(row.name),
-        quantity: row.quantity,
-        unit: row.unit,
-        connection: row.connection,
-        powerPerUnitW: row.powerPerUnitW,
-        simultaneityFactor: row.simultaneityFactor,
-        cosPhi: row.cosPhi,
-        safetySupply: row.safetySupply,
-        remark: optionalText(row.remark),
-      })),
-    })),
-  };
-}
-
-/** Stable comparison key of the saveable document (dirty detection). */
-export function estimateBalanceFingerprint(balance: EstimateBalanceSnapshot): string {
-  return JSON.stringify(toSaveableEstimateBalance(balance));
-}
-
-/**
- * German problems that would make the server reject the document. The
- * editor never saves while this list is not empty.
- */
-export function validateEstimateBalance(balance: EstimateBalanceSnapshot): string[] {
-  const problems: string[] = [];
-  const saveable = toSaveableEstimateBalance(balance);
-  if (!saveable.name) {
-    problems.push("Die Bezeichnung des Stands darf nicht leer sein.");
-  }
-  for (const group of saveable.groups) {
-    if (!group.title) {
-      problems.push(`Kostengruppe ${group.costGroup || "ohne Nummer"}: Titel fehlt.`);
-    }
-  }
-  return problems;
-}
-
-export function createCopyName(name: string) {
-  const copyName = `${name.trim()} (Kopie)`;
-  return copyName.slice(0, estimateTextLimits.balanceName);
-}
diff --git a/src/frontend/estimate-balance/estimate-balance-format.ts b/src/frontend/estimate-balance/estimate-balance-format.ts
deleted file mode 100644
index 85cddf3..0000000
--- a/src/frontend/estimate-balance/estimate-balance-format.ts
+++ /dev/null
@@ -1,122 +0,0 @@
-// Pure parsing and formatting rules of the "Grobe Leistungsbilanz" editor.
-// Numbers are entered and shown in German notation. As in the circuit list
-// editor, only "," is accepted as decimal separator: a "." is ambiguous
-// (decimal point or thousands separator) and is rejected instead of guessed.
-import { roundEstimateValue } from "../../shared/estimate-balance/estimate-balance";
-
-export type DecimalParseResult =
-  | { ok: true; value: number }
-  | { ok: false; error: string };
-
-export interface DecimalRange {
-  min?: number;
-  /** Excludes `min` itself (e.g. cos φ > 0). */
-  minExclusive?: boolean;
-  max?: number;
-}
-
-const DECIMAL_PATTERN = /^[+-]?(\d+(,\d*)?|,\d+)$/;
-
-function formatBound(value: number) {
-  return value.toLocaleString("de-DE", { maximumFractionDigits: 6, useGrouping: false });
-}
-
-export function parseGermanDecimal(text: string, range: DecimalRange = {}): DecimalParseResult {
-  const trimmed = text.trim();
-  if (!trimmed) {
-    return { ok: false, error: "Bitte einen Wert eingeben." };
-  }
-  if (trimmed.includes(".")) {
-    return { ok: false, error: "Dezimalstellen mit Komma eingeben (z. B. 0,8)." };
-  }
-  if (!DECIMAL_PATTERN.test(trimmed)) {
-    return { ok: false, error: "Ungültiger Zahlenwert." };
-  }
-  const value = Number(trimmed.replace(",", "."));
-  if (!Number.isFinite(value)) {
-    return { ok: false, error: "Ungültiger Zahlenwert." };
-  }
-  if (range.min !== undefined) {
-    if (range.minExclusive ? value <= range.min : value < range.min) {
-      return {
-        ok: false,
-        error: range.minExclusive
-          ? `Der Wert muss größer als ${formatBound(range.min)} sein.`
-          : `Der Wert darf nicht kleiner als ${formatBound(range.min)} sein.`,
-      };
-    }
-  }
-  if (range.max !== undefined && value > range.max) {
-    return { ok: false, error: `Der Wert darf nicht größer als ${formatBound(range.max)} sein.` };
-  }
-  return { ok: true, value };
-}
-
-/** Value ranges accepted by the server for the numeric document fields. */
-export const estimateNumberRanges = {
-  quantity: { min: 0 },
-  powerPerUnitW: { min: 0 },
-  simultaneityFactor: { min: 0, max: 1 },
-  cosPhi: { min: 0, minExclusive: true, max: 1 },
-  reservePercent: { min: 0, max: 100 },
-} satisfies Record<string, DecimalRange>;
-
-/**
- * Text of a numeric input field: German comma, no thousands separator, so the
- * shown text can be parsed again unchanged.
- */
-export function formatDecimalInput(value: number, maximumFractionDigits = 6): string {
-  return value.toLocaleString("de-DE", { maximumFractionDigits, useGrouping: false });
-}
-
-/**
- * Read-only display of a calculated value with thousands separator ("1.200",
- * "30,24"). The value is rounded half away from zero first, like Excel does
- * (40,175 → 40,18 instead of the binary-rounded 40,17).
- */
-export function formatGermanNumber(
-  value: number,
-  minimumFractionDigits: number,
-  maximumFractionDigits = minimumFractionDigits
-): string {
-  const rounded = roundEstimateValue(value, maximumFractionDigits);
-  // "+ 0" turns -0 into 0 and avoids "-0,00".
-  return (rounded + 0).toLocaleString("de-DE", {
-    minimumFractionDigits,
-    maximumFractionDigits,
-  });
-}
-
-export function formatKw(value: number) {
-  return formatGermanNumber(value, 2);
-}
-
-export function formatAmpere(value: number) {
-  return formatGermanNumber(value, 2);
-}
-
-export function formatSignedKw(value: number) {
-  const text = formatKw(value);
-  return value > 0 && text !== "0,00" ? `+${text}` : text;
-}
-
-export function formatDeltaPercent(value: number | null) {
-  if (value === null) {
-    return "–";
-  }
-  const text = formatGermanNumber(value, 1);
-  return `${value > 0 && text !== "0,0" ? "+" : ""}${text} %`;
-}
-
-/** "2026-09-26" → "26.09.2026"; empty/invalid → "–". */
-export function formatIsoDateGerman(dateIso: string | null): string {
-  const match = dateIso?.match(/^(\d{4})-(\d{2})-(\d{2})$/);
-  return match ? `${match[3]}.${match[2]}.${match[1]}` : "–";
-}
-
-/** Local calendar date as YYYY-MM-DD (not UTC, so late evenings stay today). */
-export function getTodayIsoDate(now: Date = new Date()): string {
-  const month = String(now.getMonth() + 1).padStart(2, "0");
-  const day = String(now.getDate()).padStart(2, "0");
-  return `${now.getFullYear()}-${month}-${day}`;
-}
diff --git a/src/frontend/estimate-balance/estimate-balance-sheet.tsx b/src/frontend/estimate-balance/estimate-balance-sheet.tsx
deleted file mode 100644
index 07dc19c..0000000
--- a/src/frontend/estimate-balance/estimate-balance-sheet.tsx
+++ /dev/null
@@ -1,669 +0,0 @@
-"use client";
-
-import type { ReactNode } from "react";
-import { ArrowDown, ArrowUp, Pencil, Plus, Trash2 } from "lucide-react";
-import {
-  calculateEstimateBalance,
-  calculateEstimateRow,
-  estimateRowConnectionLabels,
-  estimateRowUnitLabels,
-  type EstimateBalanceSnapshot,
-  type EstimateGroupSnapshot,
-  type EstimatePower,
-  type EstimateRowConnection,
-  type EstimateRowSnapshot,
-  type EstimateRowUnit,
-} from "../../shared/estimate-balance/estimate-balance";
-import {
-  addEstimateRow,
-  estimateTextLimits,
-  moveEstimateGroup,
-  removeEstimateGroup,
-  removeEstimateRow,
-  updateEstimateGroup,
-  updateEstimateRow,
-  type EstimateRowPatch,
-} from "./estimate-balance-document";
-import {
-  estimateNumberRanges,
-  formatAmpere,
-  formatDecimalInput,
-  formatKw,
-  parseGermanDecimal,
-  type DecimalRange,
-  formatGermanNumber,
-} from "./estimate-balance-format";
-import { DraftInput } from "./estimate-draft-input";
-
-export type EstimateBalanceUpdate = (
-  update: (balance: EstimateBalanceSnapshot) => EstimateBalanceSnapshot
-) => void;
-
-interface EstimateBalanceSheetProps {
-  balance: EstimateBalanceSnapshot;
-  disabled: boolean;
-  onAddGroup: () => void;
-  onChange: EstimateBalanceUpdate;
-  onEditGroup: (group: EstimateGroupSnapshot) => void;
-  onOpenGzfPicker: (groupId: string, rowId: string) => void;
-  onValidityChange: (fieldKey: string, isValid: boolean) => void;
-  threePhaseVoltageV: number;
-}
-
-// Leading columns up to cos φ; the power columns follow.
-const LEADING_COLUMN_COUNT = 9;
-const COLUMN_COUNT = 16;
-
-/** Suggested supply values; free text stays possible. */
-const SUPPLY_SUGGESTIONS = ["ELT", "MSR"];
-const SUPPLY_LIST_ID = "estimate-supply-options";
-
-function NumberInput({
-  ariaLabel,
-  disabled,
-  fieldKey,
-  onCommit,
-  onValidityChange,
-  range,
-  value,
-}: {
-  ariaLabel: string;
-  disabled: boolean;
-  fieldKey: string;
-  onCommit: (value: number) => void;
-  onValidityChange: (fieldKey: string, isValid: boolean) => void;
-  range: DecimalRange;
-  value: number;
-}) {
-  return (
-    <DraftInput
-      ariaLabel={ariaLabel}
-      className="estimate-cell-input is-numeric"
-      disabled={disabled}
-      format={(current: number) => formatDecimalInput(current)}
-      inputMode="decimal"
-      printFormat={(current: number) => formatGermanNumber(current, 0, 3)}
-      onCommit={onCommit}
-      onValidityChange={(isValid) => onValidityChange(fieldKey, isValid)}
-      parse={(text) => parseGermanDecimal(text, range)}
-      value={value}
-    />
-  );
-}
-
-function supplyOptions(balance: EstimateBalanceSnapshot): string[] {
-  const used = balance.groups.flatMap((group) =>
-    group.rows.map((row) => row.supply?.trim() ?? "")
-  );
-  return [...new Set([...SUPPLY_SUGGESTIONS, ...used.filter(Boolean)])];
-}
-
-function TextInput({
-  ariaLabel,
-  disabled,
-  list,
-  maxLength,
-  onChange,
-  placeholder,
-  value,
-}: {
-  ariaLabel: string;
-  disabled: boolean;
-  list?: string;
-  maxLength: number;
-  onChange: (value: string) => void;
-  placeholder?: string;
-  value: string | null;
-}) {
-  return (
-    <>
-      <input
-        aria-label={ariaLabel}
-        className="estimate-cell-input"
-        disabled={disabled}
-        list={list}
-        maxLength={maxLength}
-        onChange={(event) => onChange(event.target.value)}
-        placeholder={placeholder}
-        type="text"
-        value={value ?? ""}
-      />
-      <span className="estimate-print-value">{value ?? ""}</span>
-    </>
-  );
-}
-
-function IconButton({
-  children,
-  disabled,
-  label,
-  onClick,
-  variant = "secondary",
-}: {
-  children: ReactNode;
-  disabled: boolean;
-  label: string;
-  onClick: () => void;
-  variant?: "secondary" | "danger" | "primary";
-}) {
-  return (
-    <button
-      aria-label={label}
-      className={`btn btn-sm btn-outline-${variant} estimate-icon-button`}
-      disabled={disabled}
-      onClick={onClick}
-      title={label}
-      type="button"
-    >
-      {children}
-    </button>
-  );
-}
-
-function PowerCells({ power, className = "" }: { power: EstimatePower; className?: string }) {
-  return (
-    <>
-      <td className={`estimate-number ${className}`}>{formatKw(power.kw)}</td>
-      <td className={`estimate-number ${className}`}>{formatKw(power.kva)}</td>
-    </>
-  );
-}
-
-function groupLabel(group: EstimateGroupSnapshot) {
-  return [group.costGroup, group.title].filter(Boolean).join(" ");
-}
-
-function EstimateRowLine({
-  disabled,
-  group,
-  onChange,
-  onOpenGzfPicker,
-  onValidityChange,
-  row,
-  rowIndex,
-}: {
-  disabled: boolean;
-  group: EstimateGroupSnapshot;
-  onChange: EstimateBalanceUpdate;
-  onOpenGzfPicker: (groupId: string, rowId: string) => void;
-  onValidityChange: (fieldKey: string, isValid: boolean) => void;
-  row: EstimateRowSnapshot;
-  rowIndex: number;
-}) {
-  const result = calculateEstimateRow(row);
-  const rowLabel = `${groupLabel(group)}, Zeile ${rowIndex + 1}`;
-  const fieldKey = (field: string) => `${row.id}:${field}`;
-
-  function patch(rowPatch: EstimateRowPatch) {
-    onChange((balance) => updateEstimateRow(balance, group.id, row.id, rowPatch));
-  }
-
-  return (
-    <tr className="estimate-row">
-      <td className="estimate-cost-group-cell" />
-      <td>
-        <TextInput
-          ariaLabel={`Versorgung (${rowLabel})`}
-          disabled={disabled}
-          list={SUPPLY_LIST_ID}
-          maxLength={estimateTextLimits.supply}
-          onChange={(supply) => patch({ supply })}
-          placeholder="ELT"
-          value={row.supply}
-        />
-      </td>
-      <td className="estimate-name-cell">
-        <TextInput
-          ariaLabel={`Verbraucher / Fläche (${rowLabel})`}
-          disabled={disabled}
-          maxLength={estimateTextLimits.rowName}
-          onChange={(name) => patch({ name })}
-          placeholder="Verbraucher oder Fläche"
-          value={row.name}
-        />
-      </td>
-      <td>
-        <NumberInput
-          ariaLabel={`Anzahl / Fläche (${rowLabel})`}
-          disabled={disabled}
-          fieldKey={fieldKey("quantity")}
-          onCommit={(quantity) => patch({ quantity })}
-          onValidityChange={onValidityChange}
-          range={estimateNumberRanges.quantity}
-          value={row.quantity}
-        />
-      </td>
-      <td>
-        <select
-          aria-label={`Einheit (${rowLabel})`}
-          className="estimate-cell-select"
-          disabled={disabled}
-          onChange={(event) => patch({ unit: event.target.value as EstimateRowUnit })}
-          value={row.unit}
-        >
-          {(Object.keys(estimateRowUnitLabels) as EstimateRowUnit[]).map((unit) => (
-            <option key={unit} value={unit}>
-              {estimateRowUnitLabels[unit]}
-            </option>
-          ))}
-        </select>
-        <span className="estimate-print-value">{estimateRowUnitLabels[row.unit]}</span>
-      </td>
-      <td>
-        <select
-          aria-label={`Anschluss (${rowLabel})`}
-          className="estimate-cell-select"
-          disabled={disabled}
-          onChange={(event) =>
-            patch({
-              connection: (event.target.value || null) as EstimateRowConnection | null,
-            })
-          }
-          value={row.connection ?? ""}
-        >
-          <option value="">–</option>
-          {(Object.keys(estimateRowConnectionLabels) as EstimateRowConnection[]).map(
-            (connection) => (
-              <option key={connection} value={connection}>
-                {estimateRowConnectionLabels[connection]}
-              </option>
-            )
-          )}
-        </select>
-        <span className="estimate-print-value">
-          {row.connection ? estimateRowConnectionLabels[row.connection] : ""}
-        </span>
-      </td>
-      <td>
-        <div className="estimate-unit-input">
-          <NumberInput
-            ariaLabel={`Einzelleistung in ${row.unit === "area" ? "W/m²" : "W"} (${rowLabel})`}
-            disabled={disabled}
-            fieldKey={fieldKey("powerPerUnitW")}
-            onCommit={(powerPerUnitW) => patch({ powerPerUnitW })}
-            onValidityChange={onValidityChange}
-            range={estimateNumberRanges.powerPerUnitW}
-            value={row.powerPerUnitW}
-          />
-          <span className="estimate-unit-label">{row.unit === "area" ? "W/m²" : "W"}</span>
-        </div>
-      </td>
-      <td>
-        <div className="estimate-gzf-input">
-          <NumberInput
-            ariaLabel={`Gleichzeitigkeitsfaktor (${rowLabel})`}
-            disabled={disabled}
-            fieldKey={fieldKey("simultaneityFactor")}
-            onCommit={(simultaneityFactor) => patch({ simultaneityFactor })}
-            onValidityChange={onValidityChange}
-            range={estimateNumberRanges.simultaneityFactor}
-            value={row.simultaneityFactor}
-          />
-          <button
-            aria-label={`Gleichzeitigkeitsfaktor nach AMEV wählen (${rowLabel})`}
-            className="estimate-amev-button estimate-no-print"
-            disabled={disabled}
-            onClick={() => onOpenGzfPicker(group.id, row.id)}
-            title="Gleichzeitigkeitsfaktor nach AMEV wählen"
-            type="button"
-          >
-            AMEV
-          </button>
-        </div>
-      </td>
-      <td>
-        <NumberInput
-          ariaLabel={`cos φ (${rowLabel})`}
-          disabled={disabled}
-          fieldKey={fieldKey("cosPhi")}
-          onCommit={(cosPhi) => patch({ cosPhi })}
-          onValidityChange={onValidityChange}
-          range={estimateNumberRanges.cosPhi}
-          value={row.cosPhi}
-        />
-      </td>
-      <PowerCells power={result.av} />
-      <td className="estimate-center">
-        <input
-          aria-label={`Sicherheitsversorgung (${rowLabel})`}
-          checked={row.safetySupply}
-          className="form-check-input estimate-no-print"
-          disabled={disabled}
-          onChange={(event) => patch({ safetySupply: event.target.checked })}
-          type="checkbox"
-        />
-        <span className="estimate-print-value">{row.safetySupply ? "ja" : "nein"}</span>
-      </td>
-      <PowerCells
-        className={row.safetySupply ? "" : "is-muted"}
-        power={result.sv}
-      />
-      <td>
-        <TextInput
-          ariaLabel={`Anmerkung (${rowLabel})`}
-          disabled={disabled}
-          maxLength={estimateTextLimits.remark}
-          onChange={(remark) => patch({ remark })}
-          value={row.remark}
-        />
-      </td>
-      <td className="estimate-actions-cell estimate-no-print">
-        <IconButton
-          disabled={disabled}
-          label={`Zeile löschen (${rowLabel})`}
-          onClick={() => onChange((balance) => removeEstimateRow(balance, group.id, row.id))}
-          variant="danger"
-        >
-          <Trash2 aria-hidden="true" size={13} />
-        </IconButton>
-      </td>
-    </tr>
-  );
-}
-
-/**
- * Spreadsheet-like editor in the layout of the office template
- * "Leistungsbilanz – KG400": one section per cost group with title and
- * subtotal row, totals, reserve and maximum current at the end.
- */
-export function EstimateBalanceSheet({
-  balance,
-  disabled,
-  onAddGroup,
-  onChange,
-  onEditGroup,
-  onOpenGzfPicker,
-  onValidityChange,
-  threePhaseVoltageV,
-}: EstimateBalanceSheetProps) {
-  const result = calculateEstimateBalance(balance, threePhaseVoltageV);
-
-  function confirmRemoveGroup(group: EstimateGroupSnapshot) {
-    const rowText =
-      group.rows.length === 1 ? "1 Zeile" : `${group.rows.length} Zeilen`;
-    if (
-      window.confirm(
-        `Kostengruppe „${groupLabel(group)}“ mit ${rowText} wirklich löschen?`
-      )
-    ) {
-      onChange((current) => removeEstimateGroup(current, group.id));
-    }
-  }
-
-  return (
-    <div className="estimate-sheet-wrap">
-      <datalist id={SUPPLY_LIST_ID}>
-        {supplyOptions(balance).map((supply) => (
-          <option key={supply} value={supply} />
-        ))}
-      </datalist>
-      <table className="estimate-sheet">
-        <colgroup>
-          <col className="estimate-col-kg" />
-          <col className="estimate-col-supply" />
-          <col className="estimate-col-name" />
-          <col className="estimate-col-quantity" />
-          <col className="estimate-col-unit" />
-          <col className="estimate-col-connection" />
-          <col className="estimate-col-power" />
-          <col className="estimate-col-gzf" />
-          <col className="estimate-col-cosphi" />
-          <col className="estimate-col-result" />
-          <col className="estimate-col-result" />
-          <col className="estimate-col-sv" />
-          <col className="estimate-col-result" />
-          <col className="estimate-col-result" />
-          <col className="estimate-col-remark" />
-          <col className="estimate-col-actions" />
-        </colgroup>
-        <thead>
-          <tr>
-            <th rowSpan={2}>KG</th>
-            <th rowSpan={2}>
-              Versorgung
-              <span className="estimate-th-hint">ELT/MSR …</span>
-            </th>
-            <th rowSpan={2}>Verbraucher / Flächen</th>
-            <th colSpan={2}>
-              Anzahl / Fläche
-              <span className="estimate-th-hint">St. / m²</span>
-            </th>
-            <th rowSpan={2}>
-              Anschl.
-              <span className="estimate-th-hint">Fest/Steckd.</span>
-            </th>
-            <th rowSpan={2}>
-              Einzelleist.
-              <span className="estimate-th-hint">W bzw. W/m²</span>
-            </th>
-            <th rowSpan={2}>GL-Faktor</th>
-            <th rowSpan={2}>cos φ</th>
-            <th colSpan={2}>Nötige AV-Leistung</th>
-            <th colSpan={3}>Sicherheitsversorgung (SV)</th>
-            <th rowSpan={2}>Anmerkungen</th>
-            <th aria-label="Aktionen" className="estimate-no-print" rowSpan={2} />
-          </tr>
-          <tr>
-            <th>Wert</th>
-            <th>Einh.</th>
-            <th>kW</th>
-            <th>kVA</th>
-            <th>ja/nein</th>
-            <th>kW</th>
-            <th>kVA</th>
-          </tr>
-        </thead>
-        {balance.groups.map((group, groupIndex) => {
-          const groupResult = result.groups[groupIndex]!;
-          const label = groupLabel(group) || "Kostengruppe";
-          return (
-            <tbody className="estimate-group" key={group.id}>
-              <tr className="estimate-group-title-row">
-                <td className="estimate-cost-group-cell">{group.costGroup}</td>
-                <td colSpan={COLUMN_COUNT - 2}>
-                  <div className="estimate-group-title">
-                    <span className="estimate-group-name">{group.title}</span>
-                    <label
-                      className={
-                        group.editor?.trim()
-                          ? "estimate-group-editor"
-                          : "estimate-group-editor is-empty"
-                      }
-                    >
-                      <span>bearbeitet von</span>
-                      <input
-                        aria-label={`Bearbeitet von (${label})`}
-                        className="estimate-cell-input"
-                        disabled={disabled}
-                        maxLength={estimateTextLimits.groupEditor}
-                        onChange={(event) =>
-                          onChange((current) =>
-                            updateEstimateGroup(current, group.id, {
-                              editor: event.target.value,
-                            })
-                          )
-                        }
-                        placeholder="Gewerk / Name"
-                        type="text"
-                        value={group.editor ?? ""}
-                      />
-                      <span className="estimate-print-value">{group.editor ?? ""}</span>
-                    </label>
-                  </div>
-                </td>
-                <td className="estimate-actions-cell estimate-no-print">
-                  <div className="estimate-group-actions">
-                    <IconButton
-                      disabled={disabled}
-                      label={`Zeile hinzufügen (${label})`}
-                      onClick={() =>
-                        onChange((current) => addEstimateRow(current, group.id).balance)
-                      }
-                      variant="primary"
-                    >
-                      <Plus aria-hidden="true" size={13} />
-                    </IconButton>
-                    <IconButton
-                      disabled={disabled}
-                      label={`Gruppe bearbeiten (${label})`}
-                      onClick={() => onEditGroup(group)}
-                    >
-                      <Pencil aria-hidden="true" size={13} />
-                    </IconButton>
-                    <IconButton
-                      disabled={disabled || groupIndex === 0}
-                      label={`Gruppe nach oben (${label})`}
-                      onClick={() =>
-                        onChange((current) => moveEstimateGroup(current, group.id, -1))
-                      }
-                    >
-                      <ArrowUp aria-hidden="true" size={13} />
-                    </IconButton>
-                    <IconButton
-                      disabled={disabled || groupIndex === balance.groups.length - 1}
-                      label={`Gruppe nach unten (${label})`}
-                      onClick={() =>
-                        onChange((current) => moveEstimateGroup(current, group.id, 1))
-                      }
-                    >
-                      <ArrowDown aria-hidden="true" size={13} />
-                    </IconButton>
-                    <IconButton
-                      disabled={disabled}
-                      label={`Gruppe löschen (${label})`}
-                      onClick={() => confirmRemoveGroup(group)}
-                      variant="danger"
-                    >
-                      <Trash2 aria-hidden="true" size={13} />
-                    </IconButton>
-                  </div>
-                </td>
-              </tr>
-              {group.rows.map((row, rowIndex) => (
-                <EstimateRowLine
-                  disabled={disabled}
-                  group={group}
-                  key={row.id}
-                  onChange={onChange}
-                  onOpenGzfPicker={onOpenGzfPicker}
-                  onValidityChange={onValidityChange}
-                  row={row}
-                  rowIndex={rowIndex}
-                />
-              ))}
-              {!group.rows.length ? (
-                <tr className="estimate-empty-row estimate-no-print">
-                  <td />
-                  <td colSpan={COLUMN_COUNT - 1}>
-                    Noch keine Einträge – mit „+“ eine Zeile hinzufügen.
-                  </td>
-                </tr>
-              ) : null}
-              <tr className="estimate-subtotal-row">
-                <td colSpan={LEADING_COLUMN_COUNT} className="estimate-total-label">
-                  Summe {label}
-                </td>
-                <PowerCells power={groupResult.av} />
-                <td />
-                <PowerCells power={groupResult.sv} />
-                <td />
-                <td className="estimate-no-print" />
-              </tr>
-            </tbody>
-          );
-        })}
-        <tfoot>
-          <tr className="estimate-no-print estimate-add-group-row">
-            <td colSpan={COLUMN_COUNT}>
-              <button
-                className="btn btn-sm btn-outline-primary"
-                disabled={disabled}
-                onClick={onAddGroup}
-                type="button"
-              >
-                <Plus aria-hidden="true" className="me-1" size={14} />
-                Kostengruppe hinzufügen
-              </button>
-            </td>
-          </tr>
-          <tr className="estimate-total-row">
-            <td colSpan={LEADING_COLUMN_COUNT} className="estimate-total-label">
-              Gesamtsumme
-            </td>
-            <PowerCells power={result.total.av} />
-            <td />
-            <PowerCells power={result.total.sv} />
-            <td colSpan={2} />
-          </tr>
-          <tr className="estimate-total-row">
-            <td colSpan={LEADING_COLUMN_COUNT - 1} className="estimate-total-label">
-              Reserveleistung
-            </td>
-            <td>
-              <div className="estimate-unit-input">
-                <NumberInput
-                  ariaLabel="Reserve AV in Prozent"
-                  disabled={disabled}
-                  fieldKey="balance:reserveAvPercent"
-                  onCommit={(reserveAvPercent) =>
-                    onChange((current) => ({ ...current, reserveAvPercent }))
-                  }
-                  onValidityChange={onValidityChange}
-                  range={estimateNumberRanges.reservePercent}
-                  value={balance.reserveAvPercent}
-                />
-                <span className="estimate-unit-label">%</span>
-              </div>
-            </td>
-            <PowerCells power={result.reserve.av} />
-            <td>
-              <div className="estimate-unit-input">
-                <NumberInput
-                  ariaLabel="Reserve SV in Prozent"
-                  disabled={disabled}
-                  fieldKey="balance:reserveSvPercent"
-                  onCommit={(reserveSvPercent) =>
-                    onChange((current) => ({ ...current, reserveSvPercent }))
-                  }
-                  onValidityChange={onValidityChange}
-                  range={estimateNumberRanges.reservePercent}
-                  value={balance.reserveSvPercent}
-                />
-                <span className="estimate-unit-label">%</span>
-              </div>
-            </td>
-            <PowerCells power={result.reserve.sv} />
-            <td colSpan={2} />
-          </tr>
-          <tr className="estimate-total-row is-strong">
-            <td colSpan={LEADING_COLUMN_COUNT} className="estimate-total-label">
-              Leistung inkl. Reserve
-            </td>
-            <PowerCells power={result.withReserve.av} />
-            <td />
-            <PowerCells power={result.withReserve.sv} />
-            <td colSpan={2} />
-          </tr>
-          <tr className="estimate-total-row">
-            <td colSpan={LEADING_COLUMN_COUNT} className="estimate-total-label">
-              Maximalstrom
-              <span className="estimate-total-hint">
-                {threePhaseVoltageV > 0
-                  ? ` (3~, U = ${formatDecimalInput(threePhaseVoltageV)} V)`
-                  : " (Drehstromspannung im Projekt fehlt)"}
-              </span>
-            </td>
-            <td className="estimate-number" colSpan={2}>
-              {formatAmpere(result.maxCurrentA.av)} A
-            </td>
-            <td />
-            <td className="estimate-number" colSpan={2}>
-              {formatAmpere(result.maxCurrentA.sv)} A
-            </td>
-            <td colSpan={2} />
-          </tr>
-        </tfoot>
-      </table>
-    </div>
-  );
-}
diff --git a/src/frontend/estimate-balance/estimate-comparison-table.tsx b/src/frontend/estimate-balance/estimate-comparison-table.tsx
deleted file mode 100644
index f7098b0..0000000
--- a/src/frontend/estimate-balance/estimate-comparison-table.tsx
+++ /dev/null
@@ -1,88 +0,0 @@
-"use client";
-
-import {
-  roundEstimateValue,
-  type EstimateComparison,
-} from "../../shared/estimate-balance/estimate-balance";
-import { formatDeltaPercent, formatKw, formatSignedKw } from "./estimate-balance-format";
-
-function deltaClass(deltaKw: number) {
-  if (roundEstimateValue(deltaKw, 2) === 0) {
-    return "estimate-number";
-  }
-  return deltaKw > 0 ? "estimate-number is-over" : "estimate-number is-under";
-}
-
-/** Estimated AV power per cost group vs. the detailed circuit-list rows. */
-export function EstimateComparisonTable({ comparison }: { comparison: EstimateComparison }) {
-  return (
-    <div className="estimate-sheet-wrap">
-      <table className="estimate-sheet estimate-comparison">
-        <thead>
-          <tr>
-            <th>KG</th>
-            <th>Titel</th>
-            <th>geschätzt AV kW</th>
-            <th>detailliert kW</th>
-            <th>Δ kW</th>
-            <th>Δ %</th>
-          </tr>
-        </thead>
-        <tbody>
-          {comparison.groups.map((group) => (
-            <tr key={group.groupId}>
-              <td className="estimate-cost-group-cell">{group.costGroup}</td>
-              <td>
-                {group.title}
-                {group.detailedRowCount ? (
-                  <span className="estimate-th-hint">
-                    {group.detailedRowCount === 1
-                      ? "1 Gerätezeile"
-                      : `${group.detailedRowCount} Gerätezeilen`}
-                  </span>
-                ) : null}
-              </td>
-              <td className="estimate-number">{formatKw(group.estimatedAv.kw)}</td>
-              <td className="estimate-number">{formatKw(group.detailed.kw)}</td>
-              <td className={deltaClass(group.deltaKw)}>{formatSignedKw(group.deltaKw)}</td>
-              <td className={deltaClass(group.deltaKw)}>
-                {formatDeltaPercent(group.deltaPercent)}
-              </td>
-            </tr>
-          ))}
-          <tr className="estimate-unassigned-row">
-            <td />
-            <td>
-              ohne Kostengruppe / nicht zugeordnet
-              {comparison.unassigned.rowCount ? (
-                <span className="estimate-th-hint">
-                  {comparison.unassigned.rowCount === 1
-                    ? "1 Gerätezeile"
-                    : `${comparison.unassigned.rowCount} Gerätezeilen`}
-                </span>
-              ) : null}
-            </td>
-            <td className="estimate-number">–</td>
-            <td className="estimate-number">{formatKw(comparison.unassigned.kw)}</td>
-            <td className="estimate-number">–</td>
-            <td className="estimate-number">–</td>
-          </tr>
-        </tbody>
-        <tfoot>
-          <tr className="estimate-total-row is-strong">
-            <td />
-            <td className="estimate-total-label">Summe</td>
-            <td className="estimate-number">{formatKw(comparison.total.estimatedAv.kw)}</td>
-            <td className="estimate-number">{formatKw(comparison.total.detailed.kw)}</td>
-            <td className={deltaClass(comparison.total.deltaKw)}>
-              {formatSignedKw(comparison.total.deltaKw)}
-            </td>
-            <td className={deltaClass(comparison.total.deltaKw)}>
-              {formatDeltaPercent(comparison.total.deltaPercent)}
-            </td>
-          </tr>
-        </tfoot>
-      </table>
-    </div>
-  );
-}
diff --git a/src/frontend/estimate-balance/estimate-draft-input.tsx b/src/frontend/estimate-balance/estimate-draft-input.tsx
deleted file mode 100644
index 904fa2e..0000000
--- a/src/frontend/estimate-balance/estimate-draft-input.tsx
+++ /dev/null
@@ -1,112 +0,0 @@
-"use client";
-
-import { useEffect, useRef, useState } from "react";
-
-export type DraftParseResult<T> = { ok: true; value: T } | { ok: false; error: string };
-
-interface DraftInputProps<T> {
-  ariaLabel: string;
-  className?: string;
-  disabled?: boolean;
-  format: (value: T) => string;
-  /** Printed text; defaults to the input text. */
-  printFormat?: (value: T) => string;
-  inputMode?: "decimal" | "text";
-  maxLength?: number;
-  onCommit: (value: T) => void;
-  /** Reports whether the raw text is currently valid (false while invalid). */
-  onValidityChange?: (isValid: boolean) => void;
-  parse: (text: string) => DraftParseResult<T>;
-  placeholder?: string;
-  value: T;
-}
-
-/**
- * Input that keeps the raw text the user typed. Only a valid text is
- * committed into the document; an invalid text stays visible with a red
- * border and is never saved. A value changed from outside (reload, undo)
- * replaces the text unless the text already represents that value.
- */
-export function DraftInput<T>({
-  ariaLabel,
-  className = "estimate-cell-input",
-  disabled,
-  format,
-  printFormat,
-  inputMode = "text",
-  maxLength,
-  onCommit,
-  onValidityChange,
-  parse,
-  placeholder,
-  value,
-}: DraftInputProps<T>) {
-  const [text, setText] = useState(() => format(value));
-  const [error, setError] = useState<string | null>(null);
-  const [syncedValue, setSyncedValue] = useState(value);
-
-  if (!Object.is(syncedValue, value)) {
-    // Adjusting state while rendering (instead of an effect) avoids a frame
-    // with stale text after an external change.
-    setSyncedValue(value);
-    const parsed = parse(text);
-    if (!parsed.ok || !Object.is(parsed.value, value)) {
-      setText(format(value));
-      setError(null);
-    }
-  }
-
-  const validityRef = useRef(onValidityChange);
-  useEffect(() => {
-    validityRef.current = onValidityChange;
-  });
-  const isValid = error === null;
-  useEffect(() => {
-    validityRef.current?.(isValid);
-  }, [isValid]);
-  // A removed input (deleted row) must not leave an invalid marker behind.
-  useEffect(() => () => validityRef.current?.(true), []);
-
-  function handleChange(nextText: string) {
-    setText(nextText);
-    const parsed = parse(nextText);
-    if (!parsed.ok) {
-      setError(parsed.error);
-      return;
-    }
-    setError(null);
-    if (!Object.is(parsed.value, value)) {
-      setSyncedValue(parsed.value);
-      onCommit(parsed.value);
-    }
-  }
-
-  function handleBlur() {
-    // Show the canonical notation again ("0,80" → "0,8") once editing ends.
-    if (error === null) {
-      setText(format(value));
-    }
-  }
-
-  return (
-    <>
-      <input
-        aria-invalid={error ? true : undefined}
-        aria-label={ariaLabel}
-        className={error ? `${className} is-invalid` : className}
-        disabled={disabled}
-        inputMode={inputMode}
-        maxLength={maxLength}
-        onBlur={handleBlur}
-        onChange={(event) => handleChange(event.target.value)}
-        placeholder={placeholder}
-        title={error ?? undefined}
-        type="text"
-        value={text}
-      />
-      <span className="estimate-print-value">
-        {printFormat ? printFormat(value) : error ? format(value) : text}
-      </span>
-    </>
-  );
-}
diff --git a/src/frontend/estimate-balance/estimate-group-modal.tsx b/src/frontend/estimate-balance/estimate-group-modal.tsx
deleted file mode 100644
index 8d56308..0000000
--- a/src/frontend/estimate-balance/estimate-group-modal.tsx
+++ /dev/null
@@ -1,128 +0,0 @@
-"use client";
-
-import { type FormEvent, useState } from "react";
-import { FormModal } from "../components/form-modal";
-import {
-  estimateDefaultGroups,
-  type EstimateGroupSnapshot,
-} from "../../shared/estimate-balance/estimate-balance";
-import { estimateTextLimits } from "./estimate-balance-document";
-
-export interface EstimateGroupFormValues {
-  costGroup: string;
-  title: string;
-  editor: string | null;
-}
-
-interface EstimateGroupModalProps {
-  group: EstimateGroupSnapshot | null;
-  onClose: () => void;
-  onSave: (values: EstimateGroupFormValues) => void;
-}
-
-/** Creates or edits the KG number, title and "bearbeitet von" of one group. */
-export function EstimateGroupModal({ group, onClose, onSave }: EstimateGroupModalProps) {
-  const [costGroup, setCostGroup] = useState(group?.costGroup ?? "");
-  const [title, setTitle] = useState(group?.title ?? "");
-  const [editor, setEditor] = useState(group?.editor ?? "");
-
-  function applyTemplate(index: string) {
-    const template = estimateDefaultGroups[Number(index)];
-    if (template) {
-      setCostGroup(template.costGroup);
-      setTitle(template.title);
-    }
-  }
-
-  function handleSubmit(event: FormEvent<HTMLFormElement>) {
-    event.preventDefault();
-    if (!title.trim()) {
-      return;
-    }
-    onSave({
-      costGroup: costGroup.trim(),
-      title: title.trim(),
-      editor: editor.trim() || null,
-    });
-  }
-
-  return (
-    <FormModal
-      isSaving={false}
-      onClose={onClose}
-      onSubmit={handleSubmit}
-      submitDisabled={!title.trim()}
-      submitLabel={group ? "Übernehmen" : "Kostengruppe hinzufügen"}
-      title={group ? "Kostengruppe bearbeiten" : "Kostengruppe hinzufügen"}
-    >
-      <div className="row g-3">
-        {!group ? (
-          <div className="col-12">
-            <label className="form-label" htmlFor="estimate-group-template">
-              Aus Vorlage KG 400 übernehmen
-            </label>
-            <select
-              className="form-select"
-              defaultValue=""
-              id="estimate-group-template"
-              onChange={(event) => applyTemplate(event.target.value)}
-            >
-              <option value="">– Vorlage wählen –</option>
-              {estimateDefaultGroups.map((template, index) => (
-                <option key={`${template.costGroup}-${template.title}`} value={index}>
-                  {[template.costGroup, template.title].filter(Boolean).join(" ")}
-                </option>
-              ))}
-            </select>
-          </div>
-        ) : null}
-        <div className="col-12 col-md-3">
-          <label className="form-label" htmlFor="estimate-group-cost-group">
-            KG (DIN 276)
-          </label>
-          <input
-            className="form-control"
-            id="estimate-group-cost-group"
-            maxLength={estimateTextLimits.costGroup}
-            onChange={(event) => setCostGroup(event.target.value)}
-            placeholder="z. B. 440"
-            value={costGroup}
-          />
-        </div>
-        <div className="col-12 col-md-9">
-          <label className="form-label" htmlFor="estimate-group-title">
-            Titel
-          </label>
-          <input
-            className="form-control"
-            id="estimate-group-title"
-            maxLength={estimateTextLimits.groupTitle}
-            onChange={(event) => setTitle(event.target.value)}
-            placeholder="z. B. Starkstromanlagen"
-            required
-            value={title}
-          />
-        </div>
-        <div className="col-12">
-          <label className="form-label" htmlFor="estimate-group-editor">
-            Bearbeitet von
-          </label>
-          <input
-            className="form-control"
-            id="estimate-group-editor"
-            maxLength={estimateTextLimits.groupEditor}
-            onChange={(event) => setEditor(event.target.value)}
-            placeholder="Gewerk oder Name (optional)"
-            value={editor}
-          />
-        </div>
-        <div className="col-12">
-          <p className="text-secondary small mb-0">
-            Ohne KG-Nummer (z. B. „Allgemein“) wird die Gruppe im Vergleich mit der
-            detaillierten Bilanz keiner Kostengruppe zugeordnet.
-          </p>
-        </div>
-      </div>
-    </FormModal>
-  );
-}
diff --git a/src/frontend/estimate-balance/estimate-print-header.tsx b/src/frontend/estimate-balance/estimate-print-header.tsx
deleted file mode 100644
index 84ce3e9..0000000
--- a/src/frontend/estimate-balance/estimate-print-header.tsx
+++ /dev/null
@@ -1,104 +0,0 @@
-"use client";
-
-import { useEffect, useState } from "react";
-import { documentLogoUrl, getDocumentBranding } from "../utils/api";
-import type { EstimateBalanceDto, OfficeProfileDto, ProjectDto } from "../types";
-import { formatIsoDateGerman } from "./estimate-balance-format";
-
-interface EstimatePrintHeaderProps {
-  project: ProjectDto;
-  balance: EstimateBalanceDto;
-}
-
-function cssString(value: string) {
-  return JSON.stringify(value.replace(/[<>\r\n]/g, " "));
-}
-
-/**
- * Print-only title block and page footer of the rough power balance in the
- * kbp corporate design of the print view (Seitenansicht): logo, blue title,
- * meta data, "Seite x von y". Hidden on screen.
- */
-export function EstimatePrintHeader({ project, balance }: EstimatePrintHeaderProps) {
-  const [office, setOffice] = useState<OfficeProfileDto | null>(null);
-  const [hasLogo, setHasLogo] = useState(false);
-  const [logoVersion, setLogoVersion] = useState("");
-
-  useEffect(() => {
-    getDocumentBranding()
-      .then((branding) => {
-        setOffice(branding.office);
-        setHasLogo(Boolean(branding.logo));
-        setLogoVersion(branding.logo ? branding.logo.updatedAtIso : "");
-      })
-      .catch(() => {
-        setOffice(null);
-        setHasLogo(false);
-      });
-  }, []);
-
-  const stand = [balance.name, balance.workStage].filter(Boolean).join(" · ");
-  const date = balance.dateIso ? formatIsoDateGerman(balance.dateIso) : null;
-  const footer = `
-    @page estimate-balance {
-      size: A4 landscape;
-      margin: 10mm 10mm 13mm;
-      @bottom-left { content: ${cssString(`${project.name} · Grobe Leistungsbilanz`)}; font: 7.5pt Arial, sans-serif; color: #6b7280; }
-      @bottom-center { content: ${cssString(`Stand ${stand}${date ? ` · ${date}` : ""}`)}; font: 7.5pt Arial, sans-serif; color: #6b7280; }
-      @bottom-right { content: "Seite " counter(page) " von " counter(pages); font: 7.5pt Arial, sans-serif; color: #6b7280; }
-    }`;
-
-  return (
-    <>
-      <style>{footer}</style>
-      <header className="estimate-print-titleblock" aria-hidden="true">
-        <div className="estimate-print-logo">
-          {hasLogo ? (
-            <img alt="" src={`${documentLogoUrl}?v=${encodeURIComponent(logoVersion)}`} />
-          ) : (
-            <span>{office?.officeName ?? ""}</span>
-          )}
-        </div>
-        <div className="estimate-print-title">
-          <div className="estimate-print-kicker">Grobe Leistungsbilanz · KG 400</div>
-          <div className="estimate-print-heading">
-            <span className="estimate-print-stand">{balance.name}</span>
-            <span className="estimate-print-project">{project.name}</span>
-          </div>
-        </div>
-        <dl className="estimate-print-meta">
-          <div>
-            <dt>Projekt-Nr.</dt>
-            <dd>{project.internalProjectNumber ?? "–"}</dd>
-          </div>
-          <div>
-            <dt>Bauherr</dt>
-            <dd>{project.buildingOwner ?? "–"}</dd>
-          </div>
-          <div>
-            <dt>Anschrift</dt>
-            <dd>{project.siteAddress?.split("\n").join(", ") ?? "–"}</dd>
-          </div>
-        </dl>
-        <dl className="estimate-print-meta is-tinted">
-          <div>
-            <dt>Leistungsphase</dt>
-            <dd>{balance.workStage ?? "–"}</dd>
-          </div>
-          <div>
-            <dt>Datum</dt>
-            <dd>{date ?? "–"}</dd>
-          </div>
-          <div>
-            <dt>Bearbeitung</dt>
-            <dd>{project.projectEditor ?? "–"}</dd>
-          </div>
-          <div>
-            <dt>Büro</dt>
-            <dd>{office?.officeName ?? "–"}</dd>
-          </div>
-        </dl>
-      </header>
-    </>
-  );
-}
diff --git a/src/frontend/types.ts b/src/frontend/types.ts
index 11bde4a..5c14f5e 100644
--- a/src/frontend/types.ts
+++ b/src/frontend/types.ts
@@ -535,34 +535,3 @@ export interface CreateCircuitDeviceRowInputDto {
 }
 
 import type { ProjectDeviceSyncField } from "../shared/constants/project-device-sync-fields";
-
-// ── Grobe Leistungsbilanz (LPH 2/3) ─────────────────────────────────────
-// The document shapes are shared with the API; see
-// src/shared/estimate-balance/estimate-balance.ts.
-import type {
-  EstimateBalanceSnapshot,
-  EstimateComparison,
-} from "../shared/estimate-balance/estimate-balance";
-
-export type EstimateBalanceDto = EstimateBalanceSnapshot;
-export type EstimateComparisonDto = EstimateComparison;
-
-export type EstimateBalanceTemplate = "kg400" | "empty" | "copy";
-
-export interface CreateEstimateBalanceInput {
-  name: string;
-  workStage?: string | null;
-  dateIso?: string | null;
-  template: EstimateBalanceTemplate;
-  /** Required for template "copy". */
-  copyFromBalanceId?: string;
-}
-
-export interface EstimateBalanceCommandResultDto extends ProjectCommandResultDto {
-  balance: EstimateBalanceDto;
-}
-
-/** PUT result: either a new revision or an unchanged document. */
-export type EstimateBalanceUpdateResultDto =
-  | EstimateBalanceCommandResultDto
-  | { unchanged: true; balance: EstimateBalanceDto };
diff --git a/src/frontend/utils/api.ts b/src/frontend/utils/api.ts
index 501ed01..e1f4608 100644
--- a/src/frontend/utils/api.ts
+++ b/src/frontend/utils/api.ts
@@ -38,11 +38,6 @@ import type {
   ExternalInitialImportPlanDto,
   ApplyExternalInitialImportInput,
   ExternalInitialImportResultDto,
-  CreateEstimateBalanceInput,
-  EstimateBalanceCommandResultDto,
-  EstimateBalanceDto,
-  EstimateBalanceUpdateResultDto,
-  EstimateComparisonDto,
 } from "../types";
 import type { ExternalCsvConfiguration } from "../../external-model/csv/external-csv-contracts";
 import type { ProjectDeviceSyncField } from "../../shared/constants/project-device-sync-fields";
@@ -92,30 +87,6 @@ import type {
   CircuitGroupSubtreeSnapshot,
 } from "../../domain/models/circuit-group-subtree-snapshot.model";
 
-/**
- * Error of a failed API request. The message stays the server's German
- * error text; status and optional error code allow callers to react to
- * specific failures such as a revision conflict (409).
- */
-export class ApiRequestError extends Error {
-  readonly status: number;
-  readonly code: string | null;
-
-  constructor(message: string, status: number, code: string | null = null) {
-    super(message);
-    this.name = "ApiRequestError";
-    this.status = status;
-    this.code = code;
-  }
-}
-
-export function isRevisionConflictError(error: unknown) {
-  return (
-    error instanceof ApiRequestError &&
-    (error.status === 409 || error.code === "PROJECT_REVISION_CONFLICT")
-  );
-}
-
 async function request<T>(url: string, init?: RequestInit): Promise<T> {
   const response = await fetch(url, {
     ...init,
@@ -128,23 +99,15 @@ async function request<T>(url: string, init?: RequestInit): Promise<T> {
 
   if (!response.ok) {
     let details = await response.text();
-    let code: string | null = null;
     try {
-      const parsed = JSON.parse(details) as { error?: unknown; code?: unknown };
+      const parsed = JSON.parse(details) as { error?: unknown };
       if (typeof parsed.error === "string") {
         details = parsed.error;
       }
-      if (typeof parsed.code === "string") {
-        code = parsed.code;
-      }
     } catch {
       // Keep non-JSON error responses unchanged.
     }
-    throw new ApiRequestError(
-      details || `Anfrage fehlgeschlagen (Status ${response.status})`,
-      response.status,
-      code
-    );
+    throw new Error(details || `Anfrage fehlgeschlagen (Status ${response.status})`);
   }
 
   if (response.status === 204) {
@@ -1172,66 +1135,3 @@ export function disconnectProjectDeviceRows(
     }
   );
 }
-
-// ── Grobe Leistungsbilanz (LPH 2/3) ─────────────────────────────────────
-
-function estimateBalancesUrl(projectId: string, balanceId?: string) {
-  const base = `/api/projects/${projectId}/estimate-balances`;
-  return balanceId ? `${base}/${balanceId}` : base;
-}
-
-export function listEstimateBalances(projectId: string) {
-  return request<EstimateBalanceDto[]>(estimateBalancesUrl(projectId));
-}
-
-export function getEstimateBalance(projectId: string, balanceId: string) {
-  return request<EstimateBalanceDto>(estimateBalancesUrl(projectId, balanceId));
-}
-
-export function createEstimateBalance(
-  projectId: string,
-  input: CreateEstimateBalanceInput,
-  expectedRevision: number
-) {
-  return request<EstimateBalanceCommandResultDto>(estimateBalancesUrl(projectId), {
-    method: "POST",
-    body: JSON.stringify({ ...input, expectedRevision }),
-  });
-}
-
-/**
- * Saves the complete target document. `keepalive` lets the request outlive
- * the page, e.g. for the last autosave while the tab is being closed.
- */
-export function updateEstimateBalance(
-  projectId: string,
-  balance: EstimateBalanceDto,
-  expectedRevision: number,
-  options: { keepalive?: boolean } = {}
-) {
-  return request<EstimateBalanceUpdateResultDto>(
-    estimateBalancesUrl(projectId, balance.id),
-    {
-      method: "PUT",
-      body: JSON.stringify({ expectedRevision, balance }),
-      ...(options.keepalive ? { keepalive: true } : {}),
-    }
-  );
-}
-
-export function deleteEstimateBalance(
-  projectId: string,
-  balanceId: string,
-  expectedRevision: number
-) {
-  return request<ProjectCommandResultDto>(estimateBalancesUrl(projectId, balanceId), {
-    method: "DELETE",
-    body: JSON.stringify({ expectedRevision }),
-  });
-}
-
-export function getEstimateComparison(projectId: string, balanceId: string) {
-  return request<EstimateComparisonDto>(
-    `${estimateBalancesUrl(projectId, balanceId)}/comparison`
-  );
-}
diff --git a/src/frontend/utils/project-version-history.ts b/src/frontend/utils/project-version-history.ts
index 146cda8..a2880ec 100644
--- a/src/frontend/utils/project-version-history.ts
+++ b/src/frontend/utils/project-version-history.ts
@@ -68,9 +68,6 @@ const commandTypeLabels: Record<string, string> = {
   "external-object.unassign-and-delete-created-row":
     "Externes Objekt aus erzeugter Gerätezeile gelöst",
   "external-object.update-row-assignment": "Externe Objektzuordnung geändert",
-  "estimate-balance.insert": "Grobe Leistungsbilanz angelegt",
-  "estimate-balance.update": "Grobe Leistungsbilanz bearbeitet",
-  "estimate-balance.delete": "Grobe Leistungsbilanz entfernt",
 };
 
 export function getProjectRevisionSourceLabel(
diff --git a/src/server/composition/application-repositories.ts b/src/server/composition/application-repositories.ts
index 66fdd92..4f9b5ee 100644
--- a/src/server/composition/application-repositories.ts
+++ b/src/server/composition/application-repositories.ts
@@ -7,7 +7,6 @@ import { CircuitProtectionDeviceRepository } from "../../db/repositories/circuit
 import { DistributionBoardComponentRepository } from "../../db/repositories/distribution-board-component.repository.js";
 import { DistributionBoardRepository } from "../../db/repositories/distribution-board.repository.js";
 import { BuildingRepository } from "../../db/repositories/building.repository.js";
-import { EstimateBalanceRepository } from "../../db/repositories/estimate-balance.repository.js";
 import { FloorRepository } from "../../db/repositories/floor.repository.js";
 import { GlobalDeviceRepository } from "../../db/repositories/global-device.repository.js";
 import { ProjectDeviceRepository } from "../../db/repositories/project-device.repository.js";
@@ -29,7 +28,6 @@ export const distributionBoardComponentRepository =
 export const distributionBoardRepository =
   new DistributionBoardRepository(db);
 export const buildingRepository = new BuildingRepository(db);
-export const estimateBalanceRepository = new EstimateBalanceRepository(db);
 export const floorRepository = new FloorRepository(db);
 export const globalDeviceRepository = new GlobalDeviceRepository(db);
 export const projectDeviceRepository = new ProjectDeviceRepository(db);
diff --git a/src/server/composition/project-command-stores.ts b/src/server/composition/project-command-stores.ts
index 8768173..79a4a9f 100644
--- a/src/server/composition/project-command-stores.ts
+++ b/src/server/composition/project-command-stores.ts
@@ -27,7 +27,6 @@ import { ExternalInitialImportProjectCommandRepository } from "../../db/reposito
 import { ExternalObjectRowAssignmentProjectCommandRepository } from "../../db/repositories/external-object-row-assignment-project-command.repository.js";
 import { ExternalObjectNewRowProjectCommandRepository } from "../../db/repositories/external-object-new-row-project-command.repository.js";
 import { ExternalObjectNewCircuitProjectCommandRepository } from "../../db/repositories/external-object-new-circuit-project-command.repository.js";
-import { EstimateBalanceProjectCommandRepository } from "../../db/repositories/estimate-balance-project-command.repository.js";
 
 export const circuitProjectCommandStore = new CircuitProjectCommandRepository(db);
 export const circuitDeviceRowProjectCommandStore =
@@ -81,8 +80,6 @@ export const externalObjectNewRowProjectCommandStore =
   new ExternalObjectNewRowProjectCommandRepository(db);
 export const externalObjectNewCircuitProjectCommandStore =
   new ExternalObjectNewCircuitProjectCommandRepository(db);
-export const estimateBalanceProjectCommandStore =
-  new EstimateBalanceProjectCommandRepository(db);
 export const projectCommandService = new ProjectCommandService(
   circuitProjectCommandStore,
   circuitDeviceRowProjectCommandStore,
@@ -110,6 +107,5 @@ export const projectCommandService = new ProjectCommandService(
   externalInitialImportProjectCommandStore,
   externalObjectRowAssignmentProjectCommandStore,
   externalObjectNewRowProjectCommandStore,
-  externalObjectNewCircuitProjectCommandStore,
-  estimateBalanceProjectCommandStore
+  externalObjectNewCircuitProjectCommandStore
 );
diff --git a/src/server/controllers/estimate-balance.controller.ts b/src/server/controllers/estimate-balance.controller.ts
deleted file mode 100644
index a22bcb1..0000000
--- a/src/server/controllers/estimate-balance.controller.ts
+++ /dev/null
@@ -1,180 +0,0 @@
-import type { Request, Response } from "express";
-import { ZodError } from "zod";
-import {
-  createEstimateBalanceDeleteProjectCommand,
-  createEstimateBalanceInsertProjectCommand,
-  createEstimateBalanceSnapshot,
-  createEstimateBalanceUpdateProjectCommand,
-  parseEstimateBalanceSnapshot,
-  sameEstimateBalance,
-} from "../../estimate-balance/domain/estimate-balance-command.model.js";
-import {
-  createEstimateBalanceRequestSchema,
-  deleteEstimateBalanceRequestSchema,
-  updateEstimateBalanceRequestSchema,
-} from "../../estimate-balance/api/estimate-balance-request.schemas.js";
-import { compareEstimateWithDetailed } from "../../shared/estimate-balance/estimate-balance.js";
-import { estimateBalanceRepository } from "../composition/application-repositories.js";
-import { projectCommandService } from "../composition/project-command-stores.js";
-import { respondWithProjectCommandError } from "./project-command.controller.js";
-
-function params(req: Request) {
-  const { projectId, balanceId } = req.params;
-  return {
-    projectId: typeof projectId === "string" ? projectId : null,
-    balanceId: typeof balanceId === "string" ? balanceId : null,
-  };
-}
-
-export function listEstimateBalances(req: Request, res: Response) {
-  const { projectId } = params(req);
-  if (!projectId) {
-    return res.status(400).json({ error: "Ungültige Projekt-ID." });
-  }
-  return res.json(estimateBalanceRepository.listByProject(projectId));
-}
-
-export function getEstimateBalance(req: Request, res: Response) {
-  const { projectId, balanceId } = params(req);
-  if (!projectId || !balanceId) {
-    return res.status(400).json({ error: "Ungültige Parameter." });
-  }
-  const balance = estimateBalanceRepository.findById(projectId, balanceId);
-  if (!balance) {
-    return res.status(404).json({ error: "Grobe Leistungsbilanz nicht gefunden." });
-  }
-  return res.json(balance);
-}
-
-export function createEstimateBalance(req: Request, res: Response) {
-  const { projectId } = params(req);
-  if (!projectId) {
-    return res.status(400).json({ error: "Ungültige Projekt-ID." });
-  }
-  const parsed = createEstimateBalanceRequestSchema.safeParse(req.body);
-  if (!parsed.success) {
-    return res.status(400).json({ error: parsed.error.flatten() });
-  }
-  let template: Parameters<typeof createEstimateBalanceSnapshot>[0]["template"] =
-    parsed.data.template === "copy" ? "empty" : parsed.data.template;
-  if (parsed.data.template === "copy") {
-    const source = estimateBalanceRepository.findById(
-      projectId,
-      parsed.data.copyFromBalanceId!
-    );
-    if (!source) {
-      return res
-        .status(404)
-        .json({ error: "Der zu kopierende Stand wurde nicht gefunden." });
-    }
-    template = { copyFrom: source };
-  }
-  try {
-    const balance = createEstimateBalanceSnapshot({
-      projectId,
-      name: parsed.data.name,
-      workStage: parsed.data.workStage ?? null,
-      dateIso: parsed.data.dateIso ?? null,
-      sortOrder: estimateBalanceRepository.nextSortOrder(projectId),
-      template,
-    });
-    const result = projectCommandService.executeUser({
-      projectId,
-      expectedRevision: parsed.data.expectedRevision,
-      description: "Grobe Leistungsbilanz anlegen",
-      command: createEstimateBalanceInsertProjectCommand(balance),
-    });
-    return res.status(201).json({ ...result, balance });
-  } catch (error) {
-    return respondWithProjectCommandError(error, res);
-  }
-}
-
-export function updateEstimateBalance(req: Request, res: Response) {
-  const { projectId, balanceId } = params(req);
-  if (!projectId || !balanceId) {
-    return res.status(400).json({ error: "Ungültige Parameter." });
-  }
-  const parsed = updateEstimateBalanceRequestSchema.safeParse(req.body);
-  if (!parsed.success) {
-    return res.status(400).json({ error: parsed.error.flatten() });
-  }
-  let target;
-  try {
-    target = parseEstimateBalanceSnapshot(parsed.data.balance);
-  } catch (error) {
-    return res.status(400).json({
-      error: "Die grobe Leistungsbilanz enthält ungültige Werte.",
-      issues: error instanceof ZodError ? error.issues : undefined,
-    });
-  }
-  if (target.id !== balanceId || target.projectId !== projectId) {
-    return res
-      .status(400)
-      .json({ error: "Die Bilanz gehört nicht zu diesem Projekt oder dieser Adresse." });
-  }
-  const current = estimateBalanceRepository.findById(projectId, balanceId);
-  if (!current) {
-    return res.status(404).json({ error: "Grobe Leistungsbilanz nicht gefunden." });
-  }
-  if (sameEstimateBalance(current, target)) {
-    return res.json({ unchanged: true, balance: current });
-  }
-  try {
-    const result = projectCommandService.executeUser({
-      projectId,
-      expectedRevision: parsed.data.expectedRevision,
-      description: "Grobe Leistungsbilanz bearbeiten",
-      command: createEstimateBalanceUpdateProjectCommand(current, target),
-    });
-    return res.json({
-      ...result,
-      balance: estimateBalanceRepository.findById(projectId, balanceId),
-    });
-  } catch (error) {
-    return respondWithProjectCommandError(error, res);
-  }
-}
-
-export function deleteEstimateBalance(req: Request, res: Response) {
-  const { projectId, balanceId } = params(req);
-  if (!projectId || !balanceId) {
-    return res.status(400).json({ error: "Ungültige Parameter." });
-  }
-  const parsed = deleteEstimateBalanceRequestSchema.safeParse(req.body);
-  if (!parsed.success) {
-    return res.status(400).json({ error: parsed.error.flatten() });
-  }
-  const current = estimateBalanceRepository.findById(projectId, balanceId);
-  if (!current) {
-    return res.status(404).json({ error: "Grobe Leistungsbilanz nicht gefunden." });
-  }
-  try {
-    const result = projectCommandService.executeUser({
-      projectId,
-      expectedRevision: parsed.data.expectedRevision,
-      description: "Grobe Leistungsbilanz löschen",
-      command: createEstimateBalanceDeleteProjectCommand(current),
-    });
-    return res.json(result);
-  } catch (error) {
-    return respondWithProjectCommandError(error, res);
-  }
-}
-
-export function getEstimateComparison(req: Request, res: Response) {
-  const { projectId, balanceId } = params(req);
-  if (!projectId || !balanceId) {
-    return res.status(400).json({ error: "Ungültige Parameter." });
-  }
-  const balance = estimateBalanceRepository.findById(projectId, balanceId);
-  if (!balance) {
-    return res.status(404).json({ error: "Grobe Leistungsbilanz nicht gefunden." });
-  }
-  return res.json(
-    compareEstimateWithDetailed(
-      balance,
-      estimateBalanceRepository.listDetailedDeviceRowPower(projectId)
-    )
-  );
-}
diff --git a/src/server/routes/project.routes.ts b/src/server/routes/project.routes.ts
index 529def2..0b61255 100644
--- a/src/server/routes/project.routes.ts
+++ b/src/server/routes/project.routes.ts
@@ -21,14 +21,6 @@ import {
 } from "../controllers/building.controller.js";
 import { createFloor, deleteFloor, listFloorsByProject, updateFloor } from "../controllers/floor.controller.js";
 import { createRoom, deleteRoom, listRoomsByProject, updateRoom } from "../controllers/room.controller.js";
-import {
-  createEstimateBalance,
-  deleteEstimateBalance,
-  getEstimateBalance,
-  getEstimateComparison,
-  listEstimateBalances,
-  updateEstimateBalance,
-} from "../controllers/estimate-balance.controller.js";
 import { getCircuitTree } from "../controllers/circuit-tree.controller.js";
 import { getNextCircuitIdentifier } from "../controllers/circuit.controller.js";
 import {
@@ -126,12 +118,3 @@ projectRouter.get("/:projectId/rooms", listRoomsByProject);
 projectRouter.post("/:projectId/rooms", createRoom);
 projectRouter.put("/:projectId/rooms/:roomId", updateRoom);
 projectRouter.delete("/:projectId/rooms/:roomId", deleteRoom);
-projectRouter.get("/:projectId/estimate-balances", listEstimateBalances);
-projectRouter.post("/:projectId/estimate-balances", createEstimateBalance);
-projectRouter.get("/:projectId/estimate-balances/:balanceId", getEstimateBalance);
-projectRouter.put("/:projectId/estimate-balances/:balanceId", updateEstimateBalance);
-projectRouter.delete("/:projectId/estimate-balances/:balanceId", deleteEstimateBalance);
-projectRouter.get(
-  "/:projectId/estimate-balances/:balanceId/comparison",
-  getEstimateComparison
-);
diff --git a/src/shared/estimate-balance/estimate-balance.ts b/src/shared/estimate-balance/estimate-balance.ts
deleted file mode 100644
index 63d3753..0000000
--- a/src/shared/estimate-balance/estimate-balance.ts
+++ /dev/null
@@ -1,314 +0,0 @@
-/**
- * Grobe Leistungsbilanz (LPH 2/3): shared data shapes and pure calculation.
- *
- * Used by the API (validation, comparison) and by the frontend (live totals),
- * so this file has no imports: Turbopack resolves frontend imports without
- * the `.js` suffix the API build needs.
- */
-
-export type EstimateRowUnit = "piece" | "area";
-export type EstimateRowConnection = "fixed" | "socket";
-
-export interface EstimateRowSnapshot {
-  id: string;
-  sortOrder: number;
-  /** Versorgung, e.g. "ELT" or "MSR" (free text). */
-  supply: string | null;
-  /** Verbraucher / Fläche. May be empty while a row is being typed. */
-  name: string;
-  /** Anzahl (unit "piece") or area in m² (unit "area"). */
-  quantity: number;
-  unit: EstimateRowUnit;
-  connection: EstimateRowConnection | null;
-  /** W per piece or W/m². */
-  powerPerUnitW: number;
-  simultaneityFactor: number;
-  cosPhi: number;
-  /** Also needed on the safety power supply (SV). */
-  safetySupply: boolean;
-  remark: string | null;
-}
-
-export interface EstimateGroupSnapshot {
-  id: string;
-  /** DIN 276 cost group, e.g. "410" or "434"; empty for "Allgemein". */
-  costGroup: string;
-  title: string;
-  /** Trade or person responsible for the entries ("bearbeitet von"). */
-  editor: string | null;
-  sortOrder: number;
-  rows: EstimateRowSnapshot[];
-}
-
-export interface EstimateBalanceSnapshot {
-  id: string;
-  projectId: string;
-  /** Stand, e.g. "Vorplanung" or "Entwurfsplanung". */
-  name: string;
-  workStage: string | null;
-  /** ISO date YYYY-MM-DD. */
-  dateIso: string | null;
-  reserveAvPercent: number;
-  reserveSvPercent: number;
-  sortOrder: number;
-  groups: EstimateGroupSnapshot[];
-}
-
-/** Default structure of the office template "Leistungsbilanz - KG400". */
-export const estimateDefaultGroups: ReadonlyArray<{ costGroup: string; title: string }> = [
-  { costGroup: "410", title: "Sanitärtechnik" },
-  { costGroup: "420", title: "Wärmeversorgung" },
-  { costGroup: "430", title: "Lufttechnische Anlagen" },
-  { costGroup: "434", title: "Kälteanlagen" },
-  { costGroup: "440", title: "Starkstromanlagen" },
-  { costGroup: "450", title: "Schwachstromanlagen" },
-  { costGroup: "460", title: "Fördertechnik" },
-  { costGroup: "470", title: "Nutzungsspezifische Anlagen" },
-  { costGroup: "480", title: "Gebäudeautomation" },
-  { costGroup: "", title: "Allgemein" },
-];
-
-export const estimateRowUnitLabels: Record<EstimateRowUnit, string> = {
-  piece: "St.",
-  area: "m²",
-};
-
-export const estimateRowConnectionLabels: Record<EstimateRowConnection, string> = {
-  fixed: "Fest",
-  socket: "Steckd.",
-};
-
-export interface EstimatePower {
-  kw: number;
-  kva: number;
-}
-
-export interface EstimateRowResult {
-  av: EstimatePower;
-  sv: EstimatePower;
-}
-
-export interface EstimateGroupResult {
-  groupId: string;
-  av: EstimatePower;
-  sv: EstimatePower;
-}
-
-export interface EstimateBalanceResult {
-  groups: EstimateGroupResult[];
-  total: { av: EstimatePower; sv: EstimatePower };
-  reserve: { av: EstimatePower; sv: EstimatePower };
-  withReserve: { av: EstimatePower; sv: EstimatePower };
-  /** Maximum current of the three-phase supply in A (S / (√3 · U)). */
-  maxCurrentA: { av: number; sv: number };
-}
-
-/**
- * Rounds a calculated value for display like the spreadsheet does: binary
- * floating point stores 40.175 as 40.17499…, so the scaled value is first
- * cut to 6 decimals and only then rounded half away from zero
- * (40.175 -> 40.18, -1.825 -> -1.83).
- */
-export function roundEstimateValue(value: number, digits = 2): number {
-  const factor = 10 ** digits;
-  const scaled = Number((Math.abs(value) * factor).toFixed(6));
-  return (Math.sign(value) * Math.round(scaled)) / factor;
-}
-
-const zeroPower = (): EstimatePower => ({ kw: 0, kva: 0 });
-
-function addPower(left: EstimatePower, right: EstimatePower): EstimatePower {
-  return { kw: left.kw + right.kw, kva: left.kva + right.kva };
-}
-
-function scalePower(power: EstimatePower, factor: number): EstimatePower {
-  return { kw: power.kw * factor, kva: power.kva * factor };
-}
-
-/**
- * Required power of one row: P = quantity · power per unit · GLF, S = P / cos φ.
- * AV covers every consumer (normal supply); SV additionally lists the rows
- * that must also be supplied by the safety power supply.
- */
-export function calculateEstimateRow(
-  row: Pick<
-    EstimateRowSnapshot,
-    "quantity" | "powerPerUnitW" | "simultaneityFactor" | "cosPhi" | "safetySupply"
-  >
-): EstimateRowResult {
-  const kw = (row.quantity * row.powerPerUnitW * row.simultaneityFactor) / 1000;
-  const kva = row.cosPhi > 0 ? kw / row.cosPhi : 0;
-  const av = { kw, kva };
-  return { av, sv: row.safetySupply ? { ...av } : zeroPower() };
-}
-
-export function calculateEstimateBalance(
-  balance: Pick<EstimateBalanceSnapshot, "groups" | "reserveAvPercent" | "reserveSvPercent">,
-  threePhaseVoltageV: number
-): EstimateBalanceResult {
-  const groups = balance.groups.map((group) =>
-    group.rows.reduce<EstimateGroupResult>(
-      (sum, row) => {
-        const result = calculateEstimateRow(row);
-        return {
-          groupId: group.id,
-          av: addPower(sum.av, result.av),
-          sv: addPower(sum.sv, result.sv),
-        };
-      },
-      { groupId: group.id, av: zeroPower(), sv: zeroPower() }
-    )
-  );
-  const total = groups.reduce(
-    (sum, group) => ({ av: addPower(sum.av, group.av), sv: addPower(sum.sv, group.sv) }),
-    { av: zeroPower(), sv: zeroPower() }
-  );
-  const reserve = {
-    av: scalePower(total.av, balance.reserveAvPercent / 100),
-    sv: scalePower(total.sv, balance.reserveSvPercent / 100),
-  };
-  const withReserve = {
-    av: addPower(total.av, reserve.av),
-    sv: addPower(total.sv, reserve.sv),
-  };
-  const currentFactor =
-    threePhaseVoltageV > 0 ? 1000 / (Math.sqrt(3) * threePhaseVoltageV) : 0;
-  return {
-    groups,
-    total,
-    reserve,
-    withReserve,
-    maxCurrentA: {
-      av: withReserve.av.kva * currentFactor,
-      sv: withReserve.sv.kva * currentFactor,
-    },
-  };
-}
-
-/**
- * Assigns a detailed cost group (e.g. "444" or "440.1") to the best matching
- * estimate group: a group code with trailing zeros removed is a prefix
- * ("430" -> "43", "434" -> "434"); the longest prefix wins. Returns null when
- * no group matches.
- */
-export function matchEstimateCostGroup(
-  detailedCostGroup: string | null,
-  groupCostGroups: readonly string[]
-): string | null {
-  const digits = (detailedCostGroup ?? "").replace(/\D/g, "");
-  if (!digits) {
-    return null;
-  }
-  let best: { code: string; length: number } | null = null;
-  for (const code of groupCostGroups) {
-    const codeDigits = code.replace(/\D/g, "");
-    const prefix = codeDigits.replace(/0+$/, "");
-    if (!prefix || !digits.startsWith(prefix)) {
-      continue;
-    }
-    if (!best || prefix.length > best.length) {
-      best = { code, length: prefix.length };
-    }
-  }
-  return best?.code ?? null;
-}
-
-export interface EstimateComparisonGroup {
-  groupId: string;
-  costGroup: string;
-  title: string;
-  estimatedAv: EstimatePower;
-  detailed: EstimatePower;
-  detailedRowCount: number;
-  deltaKw: number;
-  /** Relative deviation of the detailed value from the estimate, null without estimate. */
-  deltaPercent: number | null;
-}
-
-export interface EstimateComparison {
-  groups: EstimateComparisonGroup[];
-  unassigned: EstimatePower & { rowCount: number };
-  total: {
-    estimatedAv: EstimatePower;
-    detailed: EstimatePower;
-    deltaKw: number;
-    deltaPercent: number | null;
-  };
-}
-
-export interface DetailedDeviceRowPower {
-  costGroup: string | null;
-  /** Total power of the device row in kW (quantity · power · device GZF). */
-  kw: number;
-  cosPhi: number | null;
-}
-
-function delta(estimated: number, detailed: number) {
-  return {
-    deltaKw: detailed - estimated,
-    deltaPercent: estimated > 0 ? ((detailed - estimated) / estimated) * 100 : null,
-  };
-}
-
-/**
- * Compares the estimate per cost group with the detailed device rows of all
- * circuit lists. The distribution-board simultaneity factor is not applied
- * on either side; a missing cos φ counts as 1.
- */
-export function compareEstimateWithDetailed(
-  balance: Pick<EstimateBalanceSnapshot, "groups" | "reserveAvPercent" | "reserveSvPercent">,
-  detailedRows: readonly DetailedDeviceRowPower[]
-): EstimateComparison {
-  const estimate = calculateEstimateBalance(balance, 0);
-  const codes = balance.groups.map((group) => group.costGroup).filter(Boolean);
-  const detailedByCode = new Map<string, EstimatePower & { rowCount: number }>();
-  const unassigned = { kw: 0, kva: 0, rowCount: 0 };
-  for (const row of detailedRows) {
-    const kva = row.cosPhi && row.cosPhi > 0 ? row.kw / row.cosPhi : row.kw;
-    const code = matchEstimateCostGroup(row.costGroup, codes);
-    const target =
-      code === null
-        ? unassigned
-        : detailedByCode.get(code) ??
-          detailedByCode.set(code, { kw: 0, kva: 0, rowCount: 0 }).get(code)!;
-    target.kw += row.kw;
-    target.kva += kva;
-    target.rowCount += 1;
-  }
-  // A cost group code can appear in several groups; the detailed value is
-  // shown once, on the first group with that code.
-  const shownCodes = new Set<string>();
-  const groups = balance.groups.map((group, index) => {
-    const estimatedAv = estimate.groups[index]!.av;
-    const detailedEntry =
-      group.costGroup && !shownCodes.has(group.costGroup)
-        ? detailedByCode.get(group.costGroup)
-        : undefined;
-    if (group.costGroup) {
-      shownCodes.add(group.costGroup);
-    }
-    const detailed = { kw: detailedEntry?.kw ?? 0, kva: detailedEntry?.kva ?? 0 };
-    return {
-      groupId: group.id,
-      costGroup: group.costGroup,
-      title: group.title,
-      estimatedAv,
-      detailed,
-      detailedRowCount: detailedEntry?.rowCount ?? 0,
-      ...delta(estimatedAv.kw, detailed.kw),
-    };
-  });
-  const detailedTotal = groups.reduce(
-    (sum, group) => addPower(sum, group.detailed),
-    { kw: unassigned.kw, kva: unassigned.kva }
-  );
-  return {
-    groups,
-    unassigned,
-    total: {
-      estimatedAv: estimate.total.av,
-      detailed: detailedTotal,
-      ...delta(estimate.total.av.kw, detailedTotal.kw),
-    },
-  };
-}
diff --git a/tests/estimate-balance-frontend.test.ts b/tests/estimate-balance-frontend.test.ts
deleted file mode 100644
index ed5f4c7..0000000
--- a/tests/estimate-balance-frontend.test.ts
+++ /dev/null
@@ -1,432 +0,0 @@
-import assert from "node:assert/strict";
-import { describe, it } from "node:test";
-import type { EstimateBalanceSnapshot } from "../src/shared/estimate-balance/estimate-balance.js";
-import {
-  addEstimateGroup,
-  addEstimateRow,
-  createCopyName,
-  createEstimateRow,
-  estimateBalanceFingerprint,
-  moveEstimateGroup,
-  moveEstimateRow,
-  normalizeEstimateSortOrder,
-  removeEstimateGroup,
-  removeEstimateRow,
-  toSaveableEstimateBalance,
-  updateEstimateGroup,
-  updateEstimateRow,
-  validateEstimateBalance,
-} from "../src/frontend/estimate-balance/estimate-balance-document.js";
-import {
-  estimateNumberRanges,
-  formatAmpere,
-  formatDecimalInput,
-  formatDeltaPercent,
-  formatIsoDateGerman,
-  formatKw,
-  formatSignedKw,
-  getTodayIsoDate,
-  parseGermanDecimal,
-} from "../src/frontend/estimate-balance/estimate-balance-format.js";
-import {
-  ApiRequestError,
-  createEstimateBalance,
-  deleteEstimateBalance,
-  getEstimateBalance,
-  getEstimateComparison,
-  isRevisionConflictError,
-  listEstimateBalances,
-  updateEstimateBalance,
-} from "../src/frontend/utils/api.js";
-
-function sequentialIds(prefix = "id") {
-  let next = 0;
-  return () => `${prefix}-${++next}`;
-}
-
-function sampleBalance(): EstimateBalanceSnapshot {
-  return {
-    id: "balance-1",
-    projectId: "project-1",
-    name: "Entwurfsplanung",
-    workStage: "LPH 3",
-    dateIso: "2026-09-26",
-    reserveAvPercent: 20,
-    reserveSvPercent: 10,
-    sortOrder: 0,
-    groups: [
-      {
-        id: "group-410",
-        costGroup: "410",
-        title: "Sanitärtechnik",
-        editor: null,
-        sortOrder: 0,
-        rows: [
-          { ...createEstimateRow(0, () => "row-a"), name: "Hebeanlage", powerPerUnitW: 1200 },
-          { ...createEstimateRow(1, () => "row-b"), name: "Durchlauferhitzer" },
-        ],
-      },
-      {
-        id: "group-440",
-        costGroup: "440",
-        title: "Starkstromanlagen",
-        editor: "ELT",
-        sortOrder: 1,
-        rows: [],
-      },
-    ],
-  };
-}
-
-describe("estimate balance number input", () => {
-  it("accepts a comma as decimal separator", () => {
-    assert.deepEqual(parseGermanDecimal("0,8"), { ok: true, value: 0.8 });
-    assert.deepEqual(parseGermanDecimal(" 1200 "), { ok: true, value: 1200 });
-    assert.deepEqual(parseGermanDecimal(",5"), { ok: true, value: 0.5 });
-    assert.deepEqual(parseGermanDecimal("3,"), { ok: true, value: 3 });
-  });
-
-  it("rejects dots, empty input and garbage", () => {
-    for (const text of ["0.8", "1.200", "", "  ", "abc", "1,2,3", "1e3", "--1"]) {
-      assert.equal(parseGermanDecimal(text).ok, false, text);
-    }
-    const dot = parseGermanDecimal("0.8");
-    assert.equal(dot.ok === false && dot.error.includes("Komma"), true);
-  });
-
-  it("checks the server ranges of the document fields", () => {
-    assert.equal(parseGermanDecimal("-1", estimateNumberRanges.quantity).ok, false);
-    assert.equal(parseGermanDecimal("0", estimateNumberRanges.quantity).ok, true);
-    assert.equal(parseGermanDecimal("1,1", estimateNumberRanges.simultaneityFactor).ok, false);
-    assert.equal(parseGermanDecimal("1", estimateNumberRanges.simultaneityFactor).ok, true);
-    assert.equal(parseGermanDecimal("0", estimateNumberRanges.cosPhi).ok, false);
-    assert.equal(parseGermanDecimal("0,01", estimateNumberRanges.cosPhi).ok, true);
-    assert.equal(parseGermanDecimal("101", estimateNumberRanges.reservePercent).ok, false);
-  });
-
-  it("formats input text so it parses back unchanged", () => {
-    assert.equal(formatDecimalInput(1200), "1200");
-    assert.equal(formatDecimalInput(0.8), "0,8");
-    const parsed = parseGermanDecimal(formatDecimalInput(12345.678));
-    assert.deepEqual(parsed, { ok: true, value: 12345.678 });
-  });
-});
-
-describe("estimate balance display format", () => {
-  it("rounds half away from zero like Excel", () => {
-    assert.equal(formatKw(40.175), "40,18");
-    assert.equal(formatKw(30.24), "30,24");
-    assert.equal(formatKw(1234.5), "1.234,50");
-    assert.equal(formatKw(-0.001), "0,00");
-    assert.equal(formatAmpere(57.75), "57,75");
-    assert.equal(formatAmpere(235.749), "235,75");
-  });
-
-  it("shows signed deltas and percentages", () => {
-    assert.equal(formatSignedKw(1.5), "+1,50");
-    assert.equal(formatSignedKw(-1.825), "-1,83");
-    assert.equal(formatSignedKw(0.001), "0,00");
-    assert.equal(formatDeltaPercent(12.34), "+12,3 %");
-    assert.equal(formatDeltaPercent(-5), "-5,0 %");
-    assert.equal(formatDeltaPercent(null), "–");
-  });
-
-  it("formats dates", () => {
-    assert.equal(formatIsoDateGerman("2026-09-26"), "26.09.2026");
-    assert.equal(formatIsoDateGerman(null), "–");
-    assert.equal(getTodayIsoDate(new Date(2026, 0, 5, 23, 30)), "2026-01-05");
-  });
-});
-
-describe("estimate balance document editing", () => {
-  it("adds rows at the end or after a row with continuous sort orders", () => {
-    const createId = sequentialIds("new");
-    const appended = addEstimateRow(sampleBalance(), "group-410", { createId });
-    assert.equal(appended.rowId, "new-1");
-    assert.deepEqual(
-      appended.balance.groups[0]!.rows.map((row) => [row.id, row.sortOrder]),
-      [["row-a", 0], ["row-b", 1], ["new-1", 2]]
-    );
-    const inserted = addEstimateRow(sampleBalance(), "group-410", {
-      afterRowId: "row-a",
-      createId,
-    });
-    assert.deepEqual(
-      inserted.balance.groups[0]!.rows.map((row) => [row.id, row.sortOrder]),
-      [["row-a", 0], ["new-2", 1], ["row-b", 2]]
-    );
-    const unknownGroup = addEstimateRow(sampleBalance(), "missing", { createId });
-    assert.equal(unknownGroup.rowId, null);
-  });
-
-  it("creates rows with neutral defaults", () => {
-    const row = createEstimateRow(3, () => "row-x");
-    assert.deepEqual(row, {
-      id: "row-x",
-      sortOrder: 3,
-      supply: null,
-      name: "",
-      quantity: 1,
-      unit: "piece",
-      connection: null,
-      powerPerUnitW: 0,
-      simultaneityFactor: 1,
-      cosPhi: 1,
-      safetySupply: false,
-      remark: null,
-    });
-  });
-
-  it("updates, removes and moves rows without touching the input", () => {
-    const original = sampleBalance();
-    const updated = updateEstimateRow(original, "group-410", "row-b", {
-      quantity: 3,
-      safetySupply: true,
-    });
-    assert.equal(updated.groups[0]!.rows[1]!.quantity, 3);
-    assert.equal(updated.groups[0]!.rows[1]!.safetySupply, true);
-    assert.equal(original.groups[0]!.rows[1]!.quantity, 1);
-
-    const removed = removeEstimateRow(original, "group-410", "row-a");
-    assert.deepEqual(
-      removed.groups[0]!.rows.map((row) => [row.id, row.sortOrder]),
-      [["row-b", 0]]
-    );
-
-    const moved = moveEstimateRow(original, "group-410", "row-b", -1);
-    assert.deepEqual(
-      moved.groups[0]!.rows.map((row) => [row.id, row.sortOrder]),
-      [["row-b", 0], ["row-a", 1]]
-    );
-    assert.equal(moveEstimateRow(original, "group-410", "row-a", -1), original);
-  });
-
-  it("adds, edits, moves and removes groups", () => {
-    const added = addEstimateGroup(
-      sampleBalance(),
-      { costGroup: "480", title: "Gebäudeautomation" },
-      () => "group-480"
-    );
-    assert.equal(added.groupId, "group-480");
-    assert.deepEqual(
-      added.balance.groups.map((group) => [group.id, group.sortOrder]),
-      [["group-410", 0], ["group-440", 1], ["group-480", 2]]
-    );
-    assert.equal(added.balance.groups[2]!.editor, null);
-
-    const edited = updateEstimateGroup(added.balance, "group-480", {
-      costGroup: "481",
-      editor: "MSR",
-    });
-    assert.equal(edited.groups[2]!.costGroup, "481");
-    assert.equal(edited.groups[2]!.title, "Gebäudeautomation");
-
-    const movedUp = moveEstimateGroup(edited, "group-480", -1);
-    assert.deepEqual(
-      movedUp.groups.map((group) => [group.id, group.sortOrder]),
-      [["group-410", 0], ["group-480", 1], ["group-440", 2]]
-    );
-    assert.equal(moveEstimateGroup(movedUp, "group-440", 1), movedUp);
-
-    const removed = removeEstimateGroup(movedUp, "group-410");
-    assert.deepEqual(
-      removed.groups.map((group) => [group.id, group.sortOrder]),
-      [["group-480", 0], ["group-440", 1]]
-    );
-    assert.equal(removeEstimateGroup(removed, "missing"), removed);
-  });
-
-  it("orders loaded documents by sortOrder", () => {
-    const balance = sampleBalance();
-    const shuffled: EstimateBalanceSnapshot = {
-      ...balance,
-      groups: [
-        { ...balance.groups[1]!, sortOrder: 7 },
-        {
-          ...balance.groups[0]!,
-          sortOrder: 2,
-          rows: [
-            { ...balance.groups[0]!.rows[1]!, sortOrder: 5 },
-            { ...balance.groups[0]!.rows[0]!, sortOrder: 1 },
-          ],
-        },
-      ],
-    };
-    const normalized = normalizeEstimateSortOrder(shuffled);
-    assert.deepEqual(
-      normalized.groups.map((group) => [group.id, group.sortOrder]),
-      [["group-410", 0], ["group-440", 1]]
-    );
-    assert.deepEqual(
-      normalized.groups[0]!.rows.map((row) => [row.id, row.sortOrder]),
-      [["row-a", 0], ["row-b", 1]]
-    );
-  });
-});
-
-describe("estimate balance saving", () => {
-  it("builds the trimmed server document with null for empty optional texts", () => {
-    let balance = sampleBalance();
-    balance = { ...balance, name: "  Entwurf ", workStage: "  ", dateIso: "" };
-    balance = updateEstimateGroup(balance, "group-440", { title: " Starkstrom ", editor: " " });
-    balance = updateEstimateRow(balance, "group-410", "row-a", {
-      name: " Hebeanlage ",
-      supply: " ELT ",
-      remark: "   ",
-    });
-    const saveable = toSaveableEstimateBalance(balance);
-    assert.equal(saveable.name, "Entwurf");
-    assert.equal(saveable.workStage, null);
-    assert.equal(saveable.dateIso, null);
-    assert.equal(saveable.groups[1]!.title, "Starkstrom");
-    assert.equal(saveable.groups[1]!.editor, null);
-    assert.deepEqual(
-      {
-        name: saveable.groups[0]!.rows[0]!.name,
-        supply: saveable.groups[0]!.rows[0]!.supply,
-        remark: saveable.groups[0]!.rows[0]!.remark,
-      },
-      { name: "Hebeanlage", supply: "ELT", remark: null }
-    );
-  });
-
-  it("copies only snapshot fields", () => {
-    const balance = sampleBalance() as EstimateBalanceSnapshot & { uiState?: string };
-    balance.uiState = "leak";
-    assert.equal("uiState" in toSaveableEstimateBalance(balance), false);
-  });
-
-  it("treats whitespace-only changes as unchanged", () => {
-    const balance = sampleBalance();
-    const withSpace = updateEstimateRow(balance, "group-410", "row-a", {
-      name: "Hebeanlage ",
-    });
-    assert.equal(estimateBalanceFingerprint(withSpace), estimateBalanceFingerprint(balance));
-    const changed = updateEstimateRow(balance, "group-410", "row-a", { quantity: 2 });
-    assert.notEqual(estimateBalanceFingerprint(changed), estimateBalanceFingerprint(balance));
-  });
-
-  it("reports documents the server would reject", () => {
-    assert.deepEqual(validateEstimateBalance(sampleBalance()), []);
-    const invalid = updateEstimateGroup(
-      { ...sampleBalance(), name: "  " },
-      "group-440",
-      { title: " " }
-    );
-    assert.equal(validateEstimateBalance(invalid).length, 2);
-  });
-
-  it("names copies", () => {
-    assert.equal(createCopyName("Entwurfsplanung "), "Entwurfsplanung (Kopie)");
-    assert.equal(createCopyName("x".repeat(200)).length, 200);
-  });
-});
-
-describe("estimate balance frontend API", () => {
-  it("calls the estimate balance endpoints", async () => {
-    const requests: Array<{ url: string; method: string; body: unknown; keepalive?: boolean }> =
-      [];
-    const originalFetch = globalThis.fetch;
-    globalThis.fetch = async (input, init) => {
-      requests.push({
-        url: String(input),
-        method: init?.method ?? "GET",
-        body: init?.body === undefined ? undefined : JSON.parse(String(init.body)),
-        ...(init?.keepalive ? { keepalive: true } : {}),
-      });
-      return new Response(JSON.stringify({}), {
-        status: 200,
-        headers: { "Content-Type": "application/json" },
-      });
-    };
-    try {
-      const balance = sampleBalance();
-      await listEstimateBalances("project-1");
-      await getEstimateBalance("project-1", "balance-1");
-      await createEstimateBalance(
-        "project-1",
-        { name: "Vorplanung", workStage: null, dateIso: "2026-09-26", template: "kg400" },
-        4
-      );
-      await createEstimateBalance(
-        "project-1",
-        { name: "Kopie", template: "copy", copyFromBalanceId: "balance-1" },
-        5
-      );
-      await updateEstimateBalance("project-1", balance, 6);
-      await updateEstimateBalance("project-1", balance, 7, { keepalive: true });
-      await deleteEstimateBalance("project-1", "balance-1", 8);
-      await getEstimateComparison("project-1", "balance-1");
-      const base = "/api/projects/project-1/estimate-balances";
-      assert.deepEqual(requests, [
-        { url: base, method: "GET", body: undefined },
-        { url: `${base}/balance-1`, method: "GET", body: undefined },
-        {
-          url: base,
-          method: "POST",
-          body: {
-            name: "Vorplanung",
-            workStage: null,
-            dateIso: "2026-09-26",
-            template: "kg400",
-            expectedRevision: 4,
-          },
-        },
-        {
-          url: base,
-          method: "POST",
-          body: {
-            name: "Kopie",
-            template: "copy",
-            copyFromBalanceId: "balance-1",
-            expectedRevision: 5,
-          },
-        },
-        {
-          url: `${base}/balance-1`,
-          method: "PUT",
-          body: { expectedRevision: 6, balance },
-        },
-        {
-          url: `${base}/balance-1`,
-          method: "PUT",
-          body: { expectedRevision: 7, balance },
-          keepalive: true,
-        },
-        { url: `${base}/balance-1`, method: "DELETE", body: { expectedRevision: 8 } },
-        { url: `${base}/balance-1/comparison`, method: "GET", body: undefined },
-      ]);
-    } finally {
-      globalThis.fetch = originalFetch;
-    }
-  });
-
-  it("exposes status and code of failed requests", async () => {
-    const originalFetch = globalThis.fetch;
-    globalThis.fetch = async () =>
-      new Response(
-        JSON.stringify({
-          error: "Projektstand veraltet.",
-          code: "PROJECT_REVISION_CONFLICT",
-        }),
-        { status: 409, headers: { "Content-Type": "application/json" } }
-      );
-    try {
-      await assert.rejects(
-        updateEstimateBalance("project-1", sampleBalance(), 1),
-        (error: unknown) => {
-          assert.ok(error instanceof ApiRequestError);
-          assert.equal(error.message, "Projektstand veraltet.");
-          assert.equal(error.status, 409);
-          assert.equal(error.code, "PROJECT_REVISION_CONFLICT");
-          assert.equal(isRevisionConflictError(error), true);
-          return true;
-        }
-      );
-    } finally {
-      globalThis.fetch = originalFetch;
-    }
-    assert.equal(isRevisionConflictError(new ApiRequestError("x", 400)), false);
-    assert.equal(isRevisionConflictError(new Error("x")), false);
-  });
-});
diff --git a/tests/estimate-balance.test.ts b/tests/estimate-balance.test.ts
deleted file mode 100644
index 1463fe4..0000000
--- a/tests/estimate-balance.test.ts
+++ /dev/null
@@ -1,458 +0,0 @@
-import path from "node:path";
-import assert from "node:assert/strict";
-import { describe, it } from "node:test";
-import { migrate } from "drizzle-orm/better-sqlite3/migrator";
-import {
-  createDatabaseContext,
-  type DatabaseContext,
-} from "../src/db/database-context.js";
-import { EstimateBalanceProjectCommandRepository } from "../src/db/repositories/estimate-balance-project-command.repository.js";
-import { EstimateBalanceRepository } from "../src/db/repositories/estimate-balance.repository.js";
-import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
-import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
-import { circuitLists } from "../src/db/schema/circuit-lists.js";
-import { circuitSections } from "../src/db/schema/circuit-sections.js";
-import { circuits } from "../src/db/schema/circuits.js";
-import { distributionBoards } from "../src/db/schema/distribution-boards.js";
-import { estimateRows } from "../src/db/schema/estimate-balances.js";
-import { projects } from "../src/db/schema/projects.js";
-import {
-  createEstimateBalanceDeleteProjectCommand,
-  createEstimateBalanceInsertProjectCommand,
-  createEstimateBalanceSnapshot,
-  createEstimateBalanceUpdateProjectCommand,
-  parseEstimateBalanceSnapshot,
-  type EstimateBalanceProjectCommand,
-} from "../src/estimate-balance/domain/estimate-balance-command.model.js";
-import { createEstimateBalanceRequestSchema } from "../src/estimate-balance/api/estimate-balance-request.schemas.js";
-import {
-  calculateEstimateBalance,
-  calculateEstimateRow,
-  compareEstimateWithDetailed,
-  estimateDefaultGroups,
-  matchEstimateCostGroup,
-  roundEstimateValue,
-  type EstimateBalanceSnapshot,
-  type EstimateRowSnapshot,
-} from "../src/shared/estimate-balance/estimate-balance.js";
-
-const round2 = (value: number) => roundEstimateValue(value, 2);
-let nextId = 0;
-const id = () => `id-${++nextId}`;
-
-function row(
-  name: string,
-  quantity: number,
-  powerPerUnitW: number,
-  simultaneityFactor: number,
-  cosPhi: number,
-  extra: Partial<EstimateRowSnapshot> = {}
-): EstimateRowSnapshot {
-  return {
-    id: id(),
-    sortOrder: 0,
-    supply: "ELT",
-    name,
-    quantity,
-    unit: "piece",
-    connection: null,
-    powerPerUnitW,
-    simultaneityFactor,
-    cosPhi,
-    safetySupply: false,
-    remark: null,
-    ...extra,
-  };
-}
-
-/** All rows of the office example "Leistungsbilanz - KG400" (Entwurfsplanung). */
-function templateExample(): EstimateBalanceSnapshot {
-  const rowsByGroup: Record<string, EstimateRowSnapshot[]> = {
-    "410": [
-      row("Durchlauferhitzer 11kW", 9, 11200, 0.3, 1),
-      row("Durchlauferhitzer 4,4kW", 4, 4400, 0.3, 1),
-    ],
-    "420": [
-      row("Fernwärmestation", 1, 1000, 0.8, 1),
-      row("Pumpen", 4, 200, 0.8, 0.9),
-      row("Schaltschrank Heizung", 1, 2000, 0.8, 1),
-    ],
-    "430": [
-      row("Lüftungsgerät", 1, 6000, 0.8, 0.9),
-      row("Schaltschrank Lüftung", 1, 2000, 0.8, 0.9),
-    ],
-    "434": [
-      row("Kälteaggregat Dach", 1, 1000, 0.8, 1),
-      row("Serverraum Kühlung Aggregat Dach", 1, 2000, 0.8, 1),
-      row("Serverraum Innengerät", 1, 1000, 0.8, 1),
-    ],
-    "440": [
-      row("Beleuchtungsanlage Klassenzimmer", 17, 500, 0.8, 0.95),
-      row("Beleuchtung Allgemein", 50, 45, 0.7, 0.95),
-      row("Außenbeleuchtung", 10, 100, 0.4, 0.95),
-      row("Fassadenbeleuchtung", 20, 60, 0.5, 0.95),
-      row("Beleuchtung MFR", 15, 50, 0.8, 0.95),
-      row("Steckdosen Klassenzimmer", 170, 300, 0.2, 0.95),
-      row("Steckdosen 230 V allg. Verbr.", 100, 500, 0.2, 0.95),
-      row("Veranstaltungstechnik", 1, 4000, 0.5, 0.95),
-      row("Küchentechnische Anlagen", 1, 10000, 0.4, 0.8),
-      row("Sicherheitsbeleuchtung Zentrale", 1, 2000, 0.8, 0.9),
-      row("Spezielle Experimentieranlagen", 1, 6000, 0.4, 0.9),
-    ],
-    "450": [row("EDV Systeme", 5, 3000, 0.8, 0.95)],
-    "460": [row("Aufzug", 1, 16000, 0.7, 0.95)],
-    "470": [row("E-Mobility Vorbereitung", 9, 11000, 0.3, 1)],
-    "480": [],
-    "": [row("Allgemein", 1, 2000, 1, 0.95)],
-  };
-  return {
-    id: "balance-1",
-    projectId: "project-1",
-    name: "Entwurfsplanung",
-    workStage: "LPH 3",
-    dateIso: "2023-06-30",
-    reserveAvPercent: 10,
-    reserveSvPercent: 0,
-    sortOrder: 0,
-    groups: estimateDefaultGroups.map((group, index) => ({
-      id: `group-${group.costGroup || "allg"}`,
-      costGroup: group.costGroup,
-      title: group.title,
-      editor: null,
-      sortOrder: index,
-      rows: rowsByGroup[group.costGroup] ?? [],
-    })),
-  };
-}
-
-function createTestDatabase(): DatabaseContext {
-  const context = createDatabaseContext(":memory:");
-  migrate(context.db, { migrationsFolder: path.resolve("src", "db", "migrations") });
-  context.db
-    .insert(projects)
-    .values([
-      { id: "project-1", name: "Test project" },
-      { id: "project-2", name: "Foreign project" },
-    ])
-    .run();
-  return context;
-}
-
-describe("estimate balance calculation", () => {
-  it("reproduces the office template totals", () => {
-    const result = calculateEstimateBalance(templateExample(), 400);
-    const groupTotals = result.groups.map((group) => [
-      round2(group.av.kw),
-      round2(group.av.kva),
-    ]);
-    assert.deepEqual(groupTotals, [
-      [35.52, 35.52],
-      [3.04, 3.11],
-      [6.4, 7.11],
-      [3.2, 3.2],
-      [40.18, 43.31],
-      [12, 12.63],
-      [11.2, 11.79],
-      [29.7, 29.7],
-      [0, 0],
-      [2, 2.11],
-    ]);
-    assert.equal(round2(result.total.av.kw), 143.24);
-    assert.equal(round2(result.total.av.kva), 148.48);
-    assert.equal(round2(result.reserve.av.kw), 14.32);
-    assert.equal(round2(result.reserve.av.kva), 14.85);
-    assert.equal(round2(result.withReserve.av.kw), 157.56);
-    assert.equal(round2(result.withReserve.av.kva), 163.33);
-    assert.equal(round2(result.maxCurrentA.av), 235.75);
-    assert.equal(result.total.sv.kw, 0);
-    assert.equal(result.maxCurrentA.sv, 0);
-  });
-
-  it("counts safety-supply rows in AV and additionally in SV, also per m²", () => {
-    const area = calculateEstimateRow({
-      quantity: 250,
-      powerPerUnitW: 12,
-      simultaneityFactor: 0.8,
-      cosPhi: 0.95,
-      safetySupply: true,
-    });
-    assert.equal(round2(area.av.kw), 2.4);
-    assert.equal(round2(area.av.kva), 2.53);
-    assert.deepEqual(area.sv, area.av);
-    const balance = templateExample();
-    balance.reserveSvPercent = 20;
-    balance.groups[4]!.rows[9]!.safetySupply = true; // Sicherheitsbeleuchtung Zentrale
-    const result = calculateEstimateBalance(balance, 400);
-    assert.equal(round2(result.total.sv.kw), 1.6);
-    assert.equal(round2(result.withReserve.sv.kw), 1.92);
-    assert.equal(round2(result.total.av.kw), 143.24);
-  });
-
-  it("rounds displayed values like the spreadsheet", () => {
-    assert.equal(roundEstimateValue(40.175), 40.18);
-    assert.equal(roundEstimateValue(143.235), 143.24);
-    assert.equal(roundEstimateValue(-1.825), -1.83);
-    assert.equal(roundEstimateValue(0.711111), 0.71);
-    assert.equal(roundEstimateValue(235.749, 1), 235.7);
-  });
-
-  it("matches detailed cost groups to the most specific estimate group", () => {
-    const codes = ["410", "430", "434", "440", "480", ""];
-    assert.equal(matchEstimateCostGroup("444", codes), "440");
-    assert.equal(matchEstimateCostGroup("434", codes), "434");
-    assert.equal(matchEstimateCostGroup("431", codes), "430");
-    assert.equal(matchEstimateCostGroup("KG 481.1", codes), "480");
-    assert.equal(matchEstimateCostGroup("4", codes), null);
-    assert.equal(matchEstimateCostGroup("", codes), null);
-    assert.equal(matchEstimateCostGroup(null, codes), null);
-    assert.equal(matchEstimateCostGroup("450", codes), null);
-  });
-
-  it("compares the estimate with detailed device rows per cost group", () => {
-    const comparison = compareEstimateWithDetailed(templateExample(), [
-      { costGroup: "444", kw: 30, cosPhi: 0.9 },
-      { costGroup: "445", kw: 12, cosPhi: null },
-      { costGroup: "412", kw: 40, cosPhi: 1 },
-      { costGroup: null, kw: 5, cosPhi: 1 },
-      { costGroup: "399", kw: 1, cosPhi: 1 },
-    ]);
-    const kg440 = comparison.groups.find((group) => group.costGroup === "440")!;
-    assert.equal(round2(kg440.detailed.kw), 42);
-    assert.equal(round2(kg440.detailed.kva), 45.33);
-    assert.equal(kg440.detailedRowCount, 2);
-    assert.ok(Math.abs(kg440.deltaKw - 1.825) < 1e-9);
-    assert.equal(round2(kg440.deltaPercent!), 4.54);
-    const kg410 = comparison.groups.find((group) => group.costGroup === "410")!;
-    assert.equal(round2(kg410.deltaKw), 4.48);
-    const kg480 = comparison.groups.find((group) => group.costGroup === "480")!;
-    assert.equal(kg480.deltaPercent, null);
-    assert.deepEqual(comparison.unassigned, { kw: 6, kva: 6, rowCount: 2 });
-    assert.equal(round2(comparison.total.detailed.kw), 88);
-    assert.equal(round2(comparison.total.estimatedAv.kw), 143.24);
-  });
-});
-
-describe("estimate balance snapshots and commands", () => {
-  it("validates snapshots strictly", () => {
-    const valid = templateExample();
-    assert.equal(parseEstimateBalanceSnapshot(valid).groups[4]!.rows[3]!.sortOrder, 3);
-    const invalid: Array<(balance: EstimateBalanceSnapshot) => void> = [
-      (balance) => (balance.groups[0]!.rows[0]!.cosPhi = 0),
-      (balance) => (balance.groups[0]!.rows[0]!.simultaneityFactor = 1.5),
-      (balance) => (balance.groups[0]!.rows[0]!.quantity = -1),
-      (balance) => (balance.groups[0]!.rows[0]!.name = " Leerzeichen "),
-      (balance) => (balance.groups[0]!.rows[0]!.supply = ""),
-      (balance) => (balance.groups[0]!.title = ""),
-      (balance) => (balance.dateIso = "30.06.2023"),
-      (balance) => (balance.reserveAvPercent = 101),
-      (balance) => (balance.groups[1]!.rows[0]!.id = balance.groups[0]!.rows[0]!.id),
-      (balance) => ((balance.groups[0]!.rows[0] as unknown as Record<string, unknown>).extra = 1),
-    ];
-    for (const mutate of invalid) {
-      const balance = structuredClone(valid);
-      mutate(balance);
-      assert.throws(() => parseEstimateBalanceSnapshot(balance));
-    }
-    assert.equal(
-      createEstimateBalanceRequestSchema.safeParse({
-        expectedRevision: 0,
-        name: "Entwurf",
-        template: "copy",
-      }).success,
-      false
-    );
-  });
-
-  it("creates the KG 400 template and copies a Stand with new ids", () => {
-    const created = createEstimateBalanceSnapshot({
-      projectId: "project-1",
-      name: " Vorplanung ",
-      workStage: "LPH 2",
-      dateIso: "2026-09-26",
-      sortOrder: 0,
-      template: "kg400",
-    });
-    assert.equal(created.name, "Vorplanung");
-    assert.deepEqual(
-      created.groups.map((group) => group.costGroup),
-      estimateDefaultGroups.map((group) => group.costGroup)
-    );
-    assert.equal(created.reserveAvPercent, 10);
-    const source = templateExample();
-    const copy = createEstimateBalanceSnapshot({
-      projectId: "project-1",
-      name: "Entwurfsplanung Kopie",
-      workStage: null,
-      dateIso: null,
-      sortOrder: 1,
-      template: { copyFrom: source },
-    });
-    assert.notEqual(copy.id, source.id);
-    assert.notEqual(copy.groups[0]!.id, source.groups[0]!.id);
-    assert.notEqual(copy.groups[0]!.rows[0]!.id, source.groups[0]!.rows[0]!.id);
-    assert.equal(
-      round2(calculateEstimateBalance(copy, 400).total.av.kw),
-      143.24
-    );
-  });
-
-  it("inserts, updates and deletes balances with persisted undo and redo", () => {
-    const context = createTestDatabase();
-    try {
-      const store = new EstimateBalanceProjectCommandRepository(context.db);
-      const reader = new EstimateBalanceRepository(context.db);
-      const history = new ProjectHistoryRepository(context.db);
-      let revision = 0;
-      const run = (
-        command: EstimateBalanceProjectCommand,
-        source: "user" | "undo" | "redo" = "user"
-      ) => {
-        const step = source === "user" ? null : history.getNextCommand("project-1", source);
-        const result = store.execute({
-          projectId: "project-1",
-          expectedRevision: revision,
-          source,
-          historyTargetChangeSetId: step?.changeSetId,
-          command,
-        });
-        revision += 1;
-        return result;
-      };
-
-      const balance = templateExample();
-      const insert = createEstimateBalanceInsertProjectCommand(balance);
-      const inserted = run(insert);
-      const stored = reader.findById("project-1", balance.id);
-      assert.deepEqual(stored, parseEstimateBalanceSnapshot(balance));
-      assert.equal(reader.listByProject("project-2").length, 0);
-
-      const target = structuredClone(stored!);
-      target.groups[0]!.rows.splice(1, 1);
-      target.groups[0]!.rows[0]!.quantity = 10;
-      target.groups[8]!.rows.push(row("GLT-Schrank", 2, 500, 1, 0.95));
-      target.groups[8]!.editor = "MSR";
-      target.reserveAvPercent = 15;
-      const update = createEstimateBalanceUpdateProjectCommand(stored!, target);
-      const updated = run(update);
-      assert.deepEqual(
-        reader.findById("project-1", balance.id),
-        parseEstimateBalanceSnapshot(target)
-      );
-
-      run(updated.inverse, "undo");
-      assert.deepEqual(reader.findById("project-1", balance.id), stored);
-      run(update, "redo");
-      assert.deepEqual(
-        reader.findById("project-1", balance.id),
-        parseEstimateBalanceSnapshot(target)
-      );
-
-      // A stale expected document is rejected.
-      assert.throws(
-        () => run(createEstimateBalanceUpdateProjectCommand(stored!, { ...stored!, name: "X" })),
-        /changed before update/
-      );
-      assert.throws(
-        () => createEstimateBalanceUpdateProjectCommand(stored!, structuredClone(stored!)),
-        /must change/
-      );
-
-      const current = reader.findById("project-1", balance.id)!;
-      const deleted = run(createEstimateBalanceDeleteProjectCommand(current));
-      assert.equal(reader.findById("project-1", balance.id), null);
-      assert.equal(context.db.select().from(estimateRows).all().length, 0);
-      run(deleted.inverse, "undo");
-      assert.deepEqual(reader.findById("project-1", balance.id), current);
-      // The original insert's inverse no longer matches the edited balance.
-      assert.throws(() => run(inserted.inverse), /changed before deletion/);
-      run(createEstimateBalanceDeleteProjectCommand(current));
-      assert.equal(reader.listByProject("project-1").length, 0);
-
-      assert.throws(
-        () => run(createEstimateBalanceInsertProjectCommand({ ...balance, projectId: "project-2" })),
-        /does not belong to project/
-      );
-    } finally {
-      context.close();
-    }
-  });
-
-  it("sums detailed device rows of all circuit lists of the project", () => {
-    const context = createTestDatabase();
-    try {
-      context.db
-        .insert(distributionBoards)
-        .values({ id: "board-1", projectId: "project-1", name: "UV 1" })
-        .run();
-      context.db
-        .insert(circuitLists)
-        .values({ id: "list-1", projectId: "project-1", distributionBoardId: "board-1", name: "UV 1" })
-        .run();
-      context.db
-        .insert(circuitSections)
-        .values({
-          id: "section-1",
-          circuitListId: "list-1",
-          key: "lighting-1",
-          displayName: "Beleuchtung 1",
-          prefix: "1F1",
-          sortOrder: 0,
-        })
-        .run();
-      context.db
-        .insert(circuits)
-        .values({
-          id: "circuit-1",
-          circuitListId: "list-1",
-          sectionId: "section-1",
-          equipmentIdentifier: "-1F1",
-          displayName: "Licht",
-          sortOrder: 0,
-        })
-        .run();
-      context.db
-        .insert(circuitDeviceRows)
-        .values([
-          {
-            id: "row-1",
-            circuitId: "circuit-1",
-            name: "Leuchte",
-            displayName: "Leuchte",
-            costGroup: "445",
-            quantity: 10,
-            powerPerUnit: 0.05,
-            simultaneityFactor: 0.8,
-            cosPhi: 0.95,
-          },
-          {
-            id: "row-2",
-            circuitId: "circuit-1",
-            name: "Steckdose",
-            displayName: "Steckdose",
-            costGroup: null,
-            quantity: 2,
-            powerPerUnit: 0.2,
-            simultaneityFactor: 0.5,
-            cosPhi: null,
-          },
-        ])
-        .run();
-      const detailed = new EstimateBalanceRepository(context.db).listDetailedDeviceRowPower(
-        "project-1"
-      );
-      assert.deepEqual(
-        detailed.map((entry) => ({ ...entry, kw: round2(entry.kw) })),
-        [
-          { costGroup: "445", kw: 0.4, cosPhi: 0.95 },
-          { costGroup: null, kw: 0.2, cosPhi: null },
-        ]
-      );
-      assert.equal(
-        new EstimateBalanceRepository(context.db).listDetailedDeviceRowPower("project-2").length,
-        0
-      );
-    } finally {
-      context.close();
-    }
-  });
-});
diff --git a/tests/print-view-migration.test.ts b/tests/print-view-migration.test.ts
index f94baf8..659b6da 100644
--- a/tests/print-view-migration.test.ts
+++ b/tests/print-view-migration.test.ts
@@ -49,9 +49,6 @@ it("upgrades a populated pre-print database through the current schema without c
     assert.equal(context.sqlite.prepare("SELECT count(*) AS count FROM buildings").get()!.count, 0);
     assert.equal(context.sqlite.prepare("SELECT count(*) AS count FROM document_branding_assets").get()!.count, 0);
     assert.equal(context.sqlite.prepare("SELECT count(*) AS count FROM document_branding_settings").get()!.count, 0);
-    assert.equal(context.sqlite.prepare("SELECT count(*) AS count FROM estimate_balances").get()!.count, 0);
-    assert.equal(context.sqlite.prepare("SELECT count(*) AS count FROM estimate_groups").get()!.count, 0);
-    assert.equal(context.sqlite.prepare("SELECT count(*) AS count FROM estimate_rows").get()!.count, 0);
     assert.deepEqual(context.sqlite.pragma("foreign_key_check"), []);
     assert.equal(context.sqlite.pragma("integrity_check", { simple: true }), "ok");
     migrate(context.db, { migrationsFolder: source });
diff --git a/tests/project-snapshot.repository.test.ts b/tests/project-snapshot.repository.test.ts
index 9131205..64141c2 100644
--- a/tests/project-snapshot.repository.test.ts
+++ b/tests/project-snapshot.repository.test.ts
@@ -11,13 +11,7 @@ import {
 import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { ProjectSnapshotRepository } from "../src/db/repositories/project-snapshot.repository.js";
 import { ProjectTransferRepository } from "../src/db/repositories/project-transfer.repository.js";
-import { ProjectStateRestoreCommandRepository } from "../src/db/repositories/project-state-restore-command.repository.js";
 import { readProjectStateSnapshot } from "../src/db/repositories/project-state-snapshot.persistence.js";
-import {
-  deleteEstimateBalance,
-  insertEstimateBalance,
-  readEstimateBalances,
-} from "../src/db/repositories/estimate-balance.persistence.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
 import { circuitLists } from "../src/db/schema/circuit-lists.js";
 import { circuitProtectionDevices } from "../src/db/schema/circuit-protection-devices.js";
@@ -34,48 +28,8 @@ import { projects } from "../src/db/schema/projects.js";
 import { rooms } from "../src/db/schema/rooms.js";
 import { deserializeProjectStateSnapshot } from "../src/domain/models/project-state-snapshot.model.js";
 import { projectStateSnapshotSchemaVersion } from "../src/domain/models/project-state-snapshot.model.js";
-import { createProjectStateRestoreCommand } from "../src/domain/models/project-state-restore-command.model.js";
 import { ProjectRevisionConflictError } from "../src/domain/errors/project-revision-conflict.error.js";
 import { ProjectSnapshotNameConflictError } from "../src/domain/errors/project-snapshot-name-conflict.error.js";
-import { parseEstimateBalanceSnapshot } from "../src/estimate-balance/domain/estimate-balance-command.model.js";
-
-function estimateBalance(projectId: string, suffix = "") {
-  return parseEstimateBalanceSnapshot({
-    id: `estimate${suffix}`,
-    projectId,
-    name: `Vorplanung${suffix}`,
-    workStage: "LPH 2",
-    dateIso: "2026-09-27",
-    reserveAvPercent: 10,
-    reserveSvPercent: 5,
-    sortOrder: 0,
-    groups: [
-      {
-        id: `estimate-group${suffix}`,
-        costGroup: "440",
-        title: "Starkstromanlagen",
-        editor: "Planung",
-        sortOrder: 0,
-        rows: [
-          {
-            id: `estimate-row${suffix}`,
-            sortOrder: 0,
-            supply: "ELT",
-            name: "Beleuchtung",
-            quantity: 100,
-            unit: "area",
-            connection: "fixed",
-            powerPerUnitW: 12,
-            simultaneityFactor: 0.8,
-            cosPhi: 0.95,
-            safetySupply: false,
-            remark: null,
-          },
-        ],
-      },
-    ],
-  });
-}
 
 function createTestDatabase(): DatabaseContext {
   const context = createDatabaseContext(":memory:");
@@ -509,41 +463,14 @@ describe("project snapshot repository", () => {
 });
 
 describe("portable project transfer", () => {
-  it("keeps estimate balances outside normal snapshot restore", () => {
-    const context = createTestDatabase();
-    try {
-      insertEstimateBalance(context.db, estimateBalance("project-1"));
-      const current = readProjectStateSnapshot(context.db, "project-1");
-      assert.ok(current);
-      new ProjectStateRestoreCommandRepository(context.db).execute({
-        projectId: "project-1",
-        expectedRevision: 0,
-        source: "restore",
-        command: createProjectStateRestoreCommand(current.payloadSha256, {
-          ...current.state,
-          project: { ...current.state.project, name: "Restored project" },
-        }),
-      });
-      assert.deepEqual(
-        readEstimateBalances(context.db, "project-1").map((entry) => entry.id),
-        ["estimate"]
-      );
-    } finally {
-      context.close();
-    }
-  });
-
   it("exports and atomically duplicates a complete project with new ids", () => {
     const context = createTestDatabase();
     try {
       context.db.update(projects).set({ siteAddress: "Musterstraße 1", workStage: "LPH 5", projectLead: "Planung", projectEditor: "Test" }).where(eq(projects.id, "project-1")).run();
       context.db.update(distributionBoards).set({ boardNumber: "UV-01", location: "Technik", fedFrom: "HAK", remark: "Prüfstand" }).where(eq(distributionBoards.projectId, "project-1")).run();
-      insertEstimateBalance(context.db, estimateBalance("project-1"));
       const repository = new ProjectTransferRepository(context.db);
       const transfer = repository.exportProject("project-1");
       assert.ok(transfer);
-      assert.equal(transfer.formatVersion, 2);
-      assert.equal(transfer.estimateBalances.length, 1);
       const duplicate = repository.importDuplicate(transfer);
       assert.notEqual(duplicate.projectId, "project-1");
       assert.equal(duplicate.name, "Snapshot-Projekt (Kopie)");
@@ -614,18 +541,6 @@ describe("portable project transfer", () => {
         copied.state.distributionBoards[0].simultaneityFactor,
         0.65
       );
-      const copiedBalances = readEstimateBalances(context.db, duplicate.projectId);
-      assert.equal(copiedBalances.length, 1);
-      assert.notEqual(copiedBalances[0].id, transfer.estimateBalances[0].id);
-      assert.notEqual(
-        copiedBalances[0].groups[0].id,
-        transfer.estimateBalances[0].groups[0].id
-      );
-      assert.notEqual(
-        copiedBalances[0].groups[0].rows[0].id,
-        transfer.estimateBalances[0].groups[0].rows[0].id
-      );
-      assert.equal(copiedBalances[0].groups[0].rows[0].name, "Beleuchtung");
     } finally {
       context.close();
     }
@@ -651,14 +566,6 @@ describe("portable project transfer", () => {
           }),
         /checksum verification failed/
       );
-      assert.throws(
-        () =>
-          repository.importDuplicate({
-            ...transfer,
-            estimateBalances: [estimateBalance("project-1", "-tampered")],
-          }),
-        /checksum verification failed/
-      );
       assert.equal(
         context.db.select().from(projects).all().length,
         1
@@ -668,79 +575,15 @@ describe("portable project transfer", () => {
     }
   });
 
-  it("imports legacy transfer version 1 with no estimate balances", () => {
-    const context = createTestDatabase();
-    try {
-      const snapshot = readProjectStateSnapshot(context.db, "project-1");
-      assert.ok(snapshot);
-      const legacyTransfer = {
-        format: "leistungsbilanz.project",
-        formatVersion: 1,
-        exportedAtIso: "2026-09-27T12:00:00.000Z",
-        payloadSha256: snapshot.payloadSha256,
-        projectState: snapshot.state,
-      };
-      const duplicate = new ProjectTransferRepository(context.db).importDuplicate(
-        legacyTransfer
-      );
-      assert.deepEqual(
-        readEstimateBalances(context.db, duplicate.projectId),
-        []
-      );
-    } finally {
-      context.close();
-    }
-  });
-
-  it("replaces exported estimate balances atomically and restores them on undo", () => {
-    const context = createTestDatabase();
-    try {
-      insertEstimateBalance(context.db, estimateBalance("project-1"));
-      const transferRepository = new ProjectTransferRepository(context.db);
-      const transfer = transferRepository.exportProject("project-1");
-      assert.ok(transfer);
-
-      deleteEstimateBalance(context.db, "project-1", "estimate");
-      insertEstimateBalance(context.db, estimateBalance("project-1", "-changed"));
-      const prepared = transferRepository.prepareReplace("project-1", transfer);
-      assert.ok(prepared);
-      const restored = new ProjectStateRestoreCommandRepository(context.db).execute({
-        projectId: "project-1",
-        expectedRevision: 0,
-        source: "restore",
-        command: prepared.command,
-      });
-      assert.deepEqual(
-        readEstimateBalances(context.db, "project-1").map((entry) => entry.id),
-        ["estimate"]
-      );
-
-      new ProjectStateRestoreCommandRepository(context.db).execute({
-        projectId: "project-1",
-        expectedRevision: 1,
-        source: "undo",
-        historyTargetChangeSetId: restored.revision.changeSetId,
-        command: restored.inverse,
-      });
-      assert.deepEqual(
-        readEstimateBalances(context.db, "project-1").map((entry) => entry.id),
-        ["estimate-changed"]
-      );
-    } finally {
-      context.close();
-    }
-  });
-
   it("rolls back a duplicate when a late project-state insert fails", () => {
     const context = createTestDatabase();
     try {
-      insertEstimateBalance(context.db, estimateBalance("project-1"));
       const repository = new ProjectTransferRepository(context.db);
       const transfer = repository.exportProject("project-1");
       assert.ok(transfer);
       context.sqlite.exec(`
-        CREATE TRIGGER fail_imported_estimate_row
-        BEFORE INSERT ON estimate_rows
+        CREATE TRIGGER fail_imported_device_row
+        BEFORE INSERT ON circuit_device_rows
         BEGIN
           SELECT RAISE(ABORT, 'forced project transfer failure');
         END;