Add test:coverage script to root package and turbo config

- Add test:coverage script to root package.json to run coverage for all packages
- Configure turbo.json pipeline to recognize test:coverage task
- Update web package test:coverage script to pass with no test files
- Enable comprehensive coverage reporting across all monorepo packages

Author: mvalancy

package.json

@@ -12,6 +12,7 @@
     "build": "turbo run build",
     "test": "turbo run test && npm run test:e2e:core",
     "test:unit": "turbo run test",
+    "test:coverage": "turbo run test:coverage",
     "test:e2e": "playwright test",
     "test:e2e:core": "playwright test --grep=\"@core\"",
     "test:e2e:error-handling": "playwright test tests/e2e/graph-error-handling.spec.ts",

packages/web/package.json

@@ -10,7 +10,7 @@
     "build": "tsc && vite build",
     "preview": "vite preview",
     "test": "vitest --run --reporter=verbose --passWithNoTests",
-    "test:coverage": "vitest run --coverage",
+    "test:coverage": "vitest run --coverage --passWithNoTests",
     "lint": "eslint src --ext .ts,.tsx",
     "typecheck": "tsc --noEmit",
     "clean": "rm -rf dist coverage node_modules/.vite"

turbo.json

@@ -12,6 +12,11 @@
       "outputs": ["coverage/**"],
       "env": ["NODE_ENV"]
     },
+    "test:coverage": {
+      "dependsOn": ["build"],
+      "outputs": ["coverage/**"],
+      "env": ["NODE_ENV"]
+    },
     "lint": {
       "outputs": []
     },