Chore: homepage tests (#6278)

.github/PULL_REQUEST_TEMPLATE.md

@@ -35,6 +35,7 @@ What type of change does your PR introduce to Homepage?
 ## Checklist:
 
 - [ ] If applicable, I have added corresponding documentation changes.
+- [ ] If applicable, I have added or updated tests for new features and bug fixes.
 - [ ] If applicable, I have reviewed the [feature / enhancement](https://gethomepage.dev/more/development/#new-feature-guidelines) and / or [service widget guidelines](https://gethomepage.dev/more/development/#service-widget-guidelines).
 - [ ] I have checked that all code style checks pass using [pre-commit hooks](https://gethomepage.dev/more/development/#code-formatting-with-pre-commit-hooks) and [linting checks](https://gethomepage.dev/more/development/#code-linting).
 - [ ] If applicable, I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.

.github/workflows/test.yml

@@ -0,0 +1,37 @@
+name: Tests
+
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+
+jobs:
+  vitest:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        shard: [1, 2, 3, 4]
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 9
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: pnpm
+
+      - run: pnpm install --frozen-lockfile
+      # Run Vitest directly so `--shard` is parsed as an option
+      - run: pnpm -s exec vitest run --coverage --shard ${{ matrix.shard }}/4 --pool forks
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage/lcov.info
+          flags: vitest,shard-${{ matrix.shard }}
+          name: vitest-shard-${{ matrix.shard }}
+          fail_ci_if_error: true