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/domain/models/distribution-board-subtree-snapshot.model.ts

@@ -10,7 +10,9 @@ import {
   type DistributionBoardComponentRole,
 } from "../../shared/constants/distribution-board-component.js";
 import {
+  distributionBoardInfoFields,
   distributionBoardSupplyTypes,
+  type DistributionBoardInfoField,
   type DistributionBoardSupplyType,
 } from "../../shared/constants/distribution-board.js";
 import type {
@@ -72,7 +74,7 @@ export interface DistributionBoardSubtreeSnapshot {
     floorId: string | null;
     supplyType: DistributionBoardSupplyType | null;
     simultaneityFactor: number;
-  };
+  } & Record<DistributionBoardInfoField, string | null>;
   circuitList: {
     id: string;
     projectId: string;
@@ -169,6 +171,22 @@ export function cloneDistributionBoardSubtree(
   return clone;
 }
 
+/**
+ * Subtree commands stored before the board info fields existed carry no
+ * info values. They are equivalent to a board whose info fields are empty,
+ * so comparisons against a freshly captured subtree and re-inserts stay
+ * exact.
+ */
+export function normalizeDistributionBoardSubtreeSnapshot(
+  snapshot: DistributionBoardSubtreeSnapshot
+): DistributionBoardSubtreeSnapshot {
+  const board = { ...snapshot.distributionBoard };
+  for (const field of distributionBoardInfoFields) {
+    board[field] = board[field] ?? null;
+  }
+  return { ...snapshot, distributionBoard: board };
+}
+
 export function assertDistributionBoardSubtreeSnapshot(
   value: unknown
 ): asserts value is DistributionBoardSubtreeSnapshot {
@@ -204,6 +222,11 @@ export function assertDistributionBoardSubtreeSnapshot(
   if (board.simultaneityFactor < 0 || board.simultaneityFactor > 1) {
     throw new Error("Distribution-board simultaneity factor is invalid.");
   }
+  for (const field of distributionBoardInfoFields) {
+    if (board[field] !== undefined) {
+      assertNullableString(board[field], `distributionBoard.${field}`);
+    }
+  }
   for (const field of [
     "id",
     "projectId",