Add print view, board info card and document logo upload

- Seitenansicht (/projects/:projectId/print): tabular cover page, board
  overview with supply structure and power sums, one plan per board with a
  repeating title block; PDF via the browser print dialog with named @page
  rules (A4 portrait cover, A4/A3 landscape plans, page x of y).
- Distribution-board info card (board number, location, fed-from, remark)
  in the board edit dialog, persisted through the additively extended
  distribution-board.update command (migration 0008, snapshot schema 6,
  legacy subtree commands normalized).
- Global document logo upload (PNG/JPEG/SVG, max 2 MB) outside project
  revisions and snapshots.
- fed-from stays free text; the overview hierarchy and cumulated sums are
  preliminary until the feed link is modeled.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/shared/constants/distribution-board.ts

@@ -24,3 +24,44 @@ export const distributionBoardSupplyTypeLabels: Record<
   MSR: "MSR – Mess-, Steuerungs- und Regelungstechnik",
   SiBe: "SiBe – Sicherheitsbeleuchtung",
 };
+
+/**
+ * Planner-owned descriptive distribution-board data shown on the board info
+ * card and in the print view. The values are local planning values. A later
+ * Revit/CSV round-trip may prefill them from mapped model parameters, but only
+ * through a previewed, explicitly confirmed project command (see
+ * docs/spec/revit-csv-integration-requirements.md); imports never overwrite
+ * them silently.
+ *
+ * `fedFrom` is intentionally free text for now. How a board is logically
+ * linked to its upstream board or feeding circuit is not decided yet.
+ */
+export const distributionBoardInfoFields = [
+  "boardNumber",
+  "location",
+  "fedFrom",
+  "remark",
+] as const;
+
+export type DistributionBoardInfoField =
+  (typeof distributionBoardInfoFields)[number];
+
+export const distributionBoardInfoFieldLabels: Record<
+  DistributionBoardInfoField,
+  string
+> = {
+  boardNumber: "Verteilernummer",
+  location: "Örtlichkeit",
+  fedFrom: "Gespeist von",
+  remark: "Bemerkung",
+};
+
+export const distributionBoardInfoFieldMaxLengths: Record<
+  DistributionBoardInfoField,
+  number
+> = {
+  boardNumber: 50,
+  location: 200,
+  fedFrom: 200,
+  remark: 2000,
+};