Fix CI: use uv for test venv, gate builds on tests, reduce build triggers

- test.yml: use uv venv instead of pip --break-system-packages
- release.yml: inline test job that must pass before version bump;
  only triggers on source file changes (src/, src-tauri/, package.json)
- sidecar-release.yml: inline Python test job that must pass before
  sidecar version bump
- Both coordinators use `needs: test` so builds never start if tests fail

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

.gitea/workflows/sidecar-release.yml

@@ -12,8 +12,27 @@ on:
   workflow_dispatch:
 
 jobs:
+  test:
+    name: Run Tests
+    if: "!contains(github.event.head_commit.message, '[skip ci]')"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install uv
+        run: |
+          curl -LsSf https://astral.sh/uv/install.sh | sh
+          echo "$HOME/.local/bin" >> $GITHUB_PATH
+
+      - name: Python tests
+        run: |
+          uv venv .testvenv
+          VIRTUAL_ENV=.testvenv uv pip install pytest httpx pytest-asyncio anyio fastapi pydantic pyyaml uvicorn requests
+          .testvenv/bin/python -m pytest backend/tests/ client/tests/ -v --tb=short
+
   bump-sidecar-version:
     name: Bump sidecar version and tag
+    needs: test
     if: "!contains(github.event.head_commit.message, '[skip ci]')"
     runs-on: ubuntu-latest
     outputs:
@@ -61,7 +80,6 @@ jobs:
           NEW_VERSION="${MAJOR}.${MINOR}.${NEW_PATCH}"
           echo "New sidecar version: ${NEW_VERSION}"
 
-          # Only update pyproject.toml -- version.py is owned by the app release workflow
           sed -i "s/^version = \"${CURRENT}\"/version = \"${NEW_VERSION}\"/" pyproject.toml
 
           echo "version=${NEW_VERSION}" >> $GITHUB_OUTPUT