fix: add fallback registries and improve deployment reliability

- Add fallback to official npm/PyPI registries when Chinese mirrors fail
- Fix dev workflow mirror host (127.0.0.1 -> 100.78.131.124)
- Add error handling and diagnostics to build steps
- Fix iPhone UI: make download/delete buttons always visible on mobile
- Add .dockerignore to reduce build context size

.gitea/workflows/deploy.yml

@@ -54,7 +54,15 @@ jobs:
           prewarm_base_image "python:3.12-slim"
 
       - name: Build
-        run: DOCKER_BUILDKIT=0 docker build -t nas-dashboard:latest dashboard/
+        run: |
+          set -e
+          export DOCKER_API_VERSION=1.43
+          if ! DOCKER_BUILDKIT=0 docker build -t nas-dashboard:latest dashboard/; then
+            echo "Build failed. Checking for network issues..."
+            curl -I https://registry.npmmirror.com || echo "npmmirror unreachable"
+            curl -I https://pypi.tuna.tsinghua.edu.cn || echo "Tsinghua PyPI unreachable"
+            exit 1
+          fi
       - name: Sync runtime compose file
         run: cp dashboard/docker-compose.yml /nas-dashboard/docker-compose.yml
       - name: Deploy