leistungsbilanz-ts/docs/spec/08-current-product-backlog.md

Current Product Backlog

This document records the next agreed product improvements. It describes requirements and intended sequencing, not proof of implementation.

Circuit List Editor

• Open the ProjectDevice drawer on the right so it does not cover the leading circuit identifier and display-name columns.
• Format displayed power values in kW with at most three decimal places.
• Format displayed factors and percentage-like values with at most two decimal places.
• Do not round persisted values; formatting applies only to the displayed value outside edit mode.
• Replace the separate Zeilensumme and Stromkreissumme columns with one Gesamtsumme column:
  • device rows show their device-row total;
  • circuit summary rows show the complete circuit total;
  • compact single-device rows show the identical device/circuit total once.
• Collect the remaining editor interaction issues before changing additional behavior.

Project History

• Every listed logical snapshot, including automatic snapshots, must be explicitly restorable from the project history UI.
• Show which project change produced a snapshot. Prefer immutable revision metadata over storing a second free-form description of the same change.
• Keep restoration auditable as a new project revision and preserve persistent undo/redo.

Distribution Boards

• Assign an optional project floor to a distribution board.
• Store a supply classification for each distribution board:
  • AV (Allgemeine Stromversorgung)
  • SV (Sicherheitsstromversorgung)
  • EV (Ersatzstromversorgung)
  • USV (Unterbrechungsfreie Stromversorgung)
• Include both fields in project snapshots and portable project export/import.
• Persist changes through project commands so they remain undoable after a restart.

Device Voltage Defaults

• Derive voltage from the selected phase type and the project settings:
  • single-phase uses the project's single-phase voltage;
  • three-phase uses the project's three-phase voltage.
• Apply this default consistently when creating global devices, project devices and manual circuit-list entries.
• Define explicit override behavior before implementation so a user-entered exceptional voltage is not silently overwritten when phase type or project settings change.

Project Overview Import

• Add JSON project import to the project overview so a portable project file can create a new project without first opening another project.
• Keep replacement of an existing project inside that project's settings.
• Validate format version and checksum before creating project data.

Recommended Sequence

1. Circuit-list presentation improvements.
2. Project-overview import as a new project.
3. Distribution-board floor and supply fields.
4. Device voltage default and override semantics.
5. Snapshot-to-revision descriptions and history presentation.

The Revit/CSV/IFCGUID round-trip remains a separate jointly planned phase and must not be inferred from these tasks.