fix: generate route tree in CI and Docker build

Ensures routeTree.gen.ts is always fresh so stale checked-in copies
don't break the frontend build or lint.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -21,6 +21,10 @@ jobs:
       - name: Install dependencies
         run: bun install --frozen-lockfile
 
+      - name: Generate route tree
+        working-directory: packages/admin
+        run: bunx @tanstack/router-cli generate
+
       - name: Lint
         run: bun run lint