fix(ci): fix convex missing from prune output and npm version mismatch

Two root causes for the Docker build failures:

1. convex/_generated/api not found (both apps)
   turbo prune only traces npm workspace packages; the root convex/ directory
   is not a workspace package so it is excluded from out/full/. Copy it
   manually into the prune output after turbo prune runs.

2. @heroui/react not found (storefront)
   package-lock.json was generated with npm@11 but node:20-alpine ships
   npm@10. turbo warns it cannot parse the npm 11 lockfile and generates an
   incomplete out/package-lock.json, causing npm ci inside Docker to miss
   packages. Upgrade npm to 11 in the deps stage of both Dockerfiles.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/deploy-staging.yml

@@ -77,7 +77,13 @@ jobs:
         run: npm ci
 
       - name: Prune workspace for ${{ matrix.app }}
-        run: npx turbo prune ${{ matrix.app }} --docker
+        run: |
+          npx turbo prune ${{ matrix.app }} --docker
+          # turbo prune only traces npm workspace packages. The root convex/ directory
+          # is not a workspace package, so it is excluded from out/full/ — causing
+          # "Module not found: convex/_generated/api" at build time.
+          # Copy it manually so the Dockerfile has the generated types it needs.
+          cp -r convex out/full/convex
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3