ci: enforce 80% backend coverage gate and add frontend coverage reporting

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

.github/workflows/ci.yml

@@ -48,7 +48,7 @@ jobs:
         run: pip install -r backend/requirements.txt -r backend/requirements-dev.txt
 
       - name: Run tests with coverage
-        run: cd backend && python -m pytest --override-ini="addopts=" --cov=app --cov-report=term-missing --cov-report=json:coverage.json
+        run: cd backend && python -m pytest --override-ini="addopts=" --cov=app --cov-report=term-missing --cov-report=json:coverage.json --cov-fail-under=80
 
       - name: Display coverage summary
         if: always()
@@ -89,8 +89,8 @@ jobs:
       - name: Lint
         run: cd frontend && npm run lint
 
-      - name: Test
-        run: cd frontend && npm test
+      - name: Test with coverage
+        run: cd frontend && npm run test:coverage
 
       - name: Build
         run: cd frontend && npm run build

.gitignore

@@ -219,6 +219,7 @@ frontend/stats.html
 frontend/playwright-report/
 frontend/test-results/
 frontend/e2e/.auth/
+frontend/coverage/
 
 # Superpowers brainstorming mockups
 .superpowers/

frontend/package.json

@@ -12,6 +12,7 @@
     "lint": "eslint .",
     "preview": "vite preview",
     "test": "vitest run",
+    "test:coverage": "vitest run --coverage",
     "test:watch": "vitest",
     "test:e2e": "playwright test",
     "test:e2e:headed": "playwright test --headed",
@@ -48,6 +49,7 @@
     "recharts": "^3.7.0",
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.4.0",
+    "web-vitals": "^4.2.4",
     "zundo": "^2.3.0",
     "zustand": "^5.0.10"
   },
@@ -60,6 +62,7 @@
     "@types/node": "^24.10.9",
     "@types/react": "^19.2.5",
     "@types/react-dom": "^19.2.3",
+    "@vitest/coverage-v8": "^4.0.18",
     "@vitejs/plugin-react": "^5.1.1",
     "eslint": "^9.39.1",
     "eslint-plugin-react-hooks": "^7.0.1",

frontend/vite.config.ts

@@ -33,6 +33,18 @@ export default defineConfig({
     environment: 'jsdom',
     setupFiles: './src/test/setup.ts',
     include: ['src/**/*.{test,spec}.{ts,tsx}'],
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'json-summary', 'html'],
+      include: ['src/**/*.{ts,tsx}'],
+      exclude: [
+        'src/test/**',
+        'src/types/**',
+        'src/**/*.d.ts',
+        'src/instrument.ts',
+        'src/main.tsx',
+      ],
+    },
   },
   build: {
     sourcemap: 'hidden', // Generate source maps but don't expose them publicly