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/schema/distribution-boards.ts

@@ -16,5 +16,9 @@ export const distributionBoards = sqliteTable("distribution_boards", {
   simultaneityFactor: real("simultaneity_factor")
     .notNull()
     .default(1),
+  boardNumber: text("board_number"),
+  location: text("location"),
+  fedFrom: text("fed_from"),
+  remark: text("remark"),
 });
 

src/db/schema/document-branding-assets.ts

@@ -0,0 +1,18 @@
+import { sql } from "drizzle-orm";
+import { blob, integer, sqliteTable, text } from "drizzle-orm/sqlite-core";
+
+// Office-wide branding for printed documents (currently only the logo shown
+// on the cover page and plan title blocks). Global application data, not part
+// of any project: it is deliberately outside project revisions, logical
+// project snapshots and project transfer.
+export const documentBrandingAssets = sqliteTable("document_branding_assets", {
+  key: text("key").primaryKey(),
+  mimeType: text("mime_type").notNull(),
+  fileName: text("file_name"),
+  data: blob("data", { mode: "buffer" }).notNull(),
+  updatedAt: integer("updated_at", { mode: "timestamp" })
+    .notNull()
+    .default(sql`(unixepoch())`),
+});
+
+export type DocumentBrandingAsset = typeof documentBrandingAssets.$inferSelect;