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/db/repositories/distribution-board-subtree-project-command.repository.ts

@@ -10,6 +10,7 @@ import {
 } from "../../domain/models/distribution-board-subtree-project-command.model.js";
 import {
   assertDistributionBoardSubtreeSnapshot,
+  normalizeDistributionBoardSubtreeSnapshot,
   type DistributionBoardSubtreeSnapshot,
 } from "../../domain/models/distribution-board-subtree-snapshot.model.js";
 import type {
@@ -63,19 +64,20 @@ export class DistributionBoardSubtreeProjectCommandRepository
     projectId: string,
     command: DistributionBoardSubtreeProjectCommand
   ) {
+    const snapshot = normalizeDistributionBoardSubtreeSnapshot(
+      command.payload.snapshot
+    );
     if (command.type === distributionBoardInsertSubtreeCommandType) {
-      this.insert(database, projectId, command.payload.snapshot);
-      return createDistributionBoardDeleteSubtreeProjectCommand(
-        command.payload.snapshot
-      );
+      this.insert(database, projectId, snapshot);
+      return createDistributionBoardDeleteSubtreeProjectCommand(snapshot);
     }
     if (command.type === distributionBoardDeleteSubtreeCommandType) {
       const current = this.captureFrom(
         database,
         projectId,
-        command.payload.snapshot.distributionBoard.id
+        snapshot.distributionBoard.id
       );
-      if (!sameSnapshot(current, command.payload.snapshot)) {
+      if (!sameSnapshot(current, snapshot)) {
         throw new Error(
           "Distribution-board subtree changed before deletion."
         );
@@ -97,9 +99,7 @@ export class DistributionBoardSubtreeProjectCommandRepository
           "Distribution-board subtree could not be deleted."
         );
       }
-      return createDistributionBoardInsertSubtreeProjectCommand(
-        command.payload.snapshot
-      );
+      return createDistributionBoardInsertSubtreeProjectCommand(snapshot);
     }
     throw new Error("Unsupported distribution-board subtree command.");
   }