test: add @vitest/coverage-v8 + test:coverage to all workspaces

apps/worker/package.json

@@ -9,7 +9,8 @@
     "preview": "vite preview",
     "typecheck": "tsc -b",
     "test": "vitest run",
-    "test:watch": "vitest"
+    "test:watch": "vitest",
+    "test:coverage": "vitest run --coverage"
   },
   "dependencies": {
     "@solelog/shared": "workspace:*",
@@ -26,6 +27,7 @@
     "@types/react": "^18.3.0",
     "@types/react-dom": "^18.3.0",
     "@vitejs/plugin-react": "^4.3.0",
+    "@vitest/coverage-v8": "^3",
     "jsdom": "^25.0.0",
     "typescript": "^5.7.2",
     "vite": "^7.0.0",

apps/worker/vitest.config.ts

@@ -3,5 +3,16 @@ import react from '@vitejs/plugin-react';
 
 export default defineConfig({
   plugins: [react()],
-  test: { environment: 'jsdom', globals: true, setupFiles: ['./src/test/setup.ts'] },
+  test: {
+    environment: 'jsdom',
+    globals: true,
+    setupFiles: ['./src/test/setup.ts'],
+    coverage: {
+      provider: 'v8',
+      all: true,
+      reporter: ['text', 'json-summary'],
+      include: ['src/**'],
+      exclude: ['src/main.tsx', 'src/vite-env.d.ts', 'src/test/**', '**/*.d.ts'],
+    },
+  },
 });