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/server/controllers/distribution-board.controller.ts

@@ -9,6 +9,7 @@ import {
   createDistributionBoardInsertSubtreeProjectCommand,
 } from "../../domain/models/distribution-board-subtree-project-command.model.js";
 import { cloneDistributionBoardSubtree } from "../../domain/models/distribution-board-subtree-snapshot.model.js";
+import { distributionBoardInfoFields } from "../../shared/constants/distribution-board.js";
 import {
   copyDistributionBoardSchema,
   createDistributionBoardSchema,
@@ -64,6 +65,10 @@ export async function createDistributionBoard(req: Request, res: Response) {
       distributionBoard: {
         ...structure.distributionBoard,
         simultaneityFactor: 1,
+        boardNumber: null,
+        location: null,
+        fedFrom: null,
+        remark: null,
       },
     });
   } catch (error) {
@@ -86,6 +91,13 @@ export async function updateDistributionBoard(
   if (!parsed.success) {
     return res.status(400).json({ error: parsed.error.flatten() });
   }
+  // Info fields are optional in the request; only submitted fields become
+  // part of the command and therefore of its inverse.
+  const infoPatch = Object.fromEntries(
+    distributionBoardInfoFields
+      .filter((field) => parsed.data[field] !== undefined)
+      .map((field) => [field, parsed.data[field]])
+  );
   try {
     const result = projectCommandService.executeUser({
       projectId,
@@ -97,6 +109,7 @@ export async function updateDistributionBoard(
           floorId: parsed.data.floorId,
           supplyType: parsed.data.supplyType,
           simultaneityFactor: parsed.data.simultaneityFactor,
+          ...infoPatch,
         }
       ),
     });