QA: unit tests for API logic, Playwright smoke tests, pre-push check, manual QA checklist

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -16,6 +16,11 @@
     "build": "npm run build --workspaces --if-present",
     "build:shared": "npm run build -w @mento/shared",
     "lint": "npm run lint --workspaces --if-present",
+    "test": "npm run build -w @mento/shared && npm test -w @mento/api",
+    "test:e2e": "playwright test",
+    "test:e2e:report": "playwright show-report",
+    "check": "node scripts/check.mjs",
+    "prepare": "node -e \"try{require('child_process').execSync('git config core.hooksPath .githooks',{stdio:'ignore'})}catch{}\"",
     "db:generate": "npm run prisma:generate -w @mento/api",
     "db:migrate": "npm run prisma:migrate -w @mento/api",
     "db:seed": "npm run prisma:seed -w @mento/api"
@@ -25,5 +30,8 @@
   },
   "optionalDependencies": {
     "@rollup/rollup-win32-x64-msvc": "^4.63.1"
+  },
+  "devDependencies": {
+    "@playwright/test": "^1.64.0"
   }
 }