feat: Add core NestJS dependencies and remove unused e2e test variables.

Author: PhuocHoan

e2e/notifications.spec.ts

@@ -23,7 +23,7 @@ test.describe('Notifications System', () => {
     // 3. Verify Dropdown Content
     // It should either show a list or "No notifications yet"
     // We expect one of these to be visible.
-    const hasItems = await page.getByText('Notifications').isVisible();
+
     // The header "Notifications" is always there in standard dropdowns usually?
     // In notification-dropdown.tsx: <h4 className="font-semibold text-sm">Notifications</h4>
     await expect(

e2e/payments.spec.ts

@@ -10,7 +10,6 @@ test.describe('Payments System', () => {
     test.setTimeout(180000); // 3 minutes for full flow
     const uniqueId = Date.now().toString();
     const courseTitle = `Paid Course ${uniqueId}`;
-    const studentEmail = `student${uniqueId}@test.com`;
 
     // 1. Instructor: Create & Submit Course
     authPage = new AuthPage(page);

package.json

@@ -17,7 +17,13 @@
     "test:e2e:headed": "playwright test --headed",
     "precommit": "pnpm format && turbo lint typecheck test build --force"
   },
-  "dependencies": {},
+  "dependencies": {
+    "@nestjs/common": "^11.1.10",
+    "@nestjs/core": "^11.1.10",
+    "@nestjs/platform-express": "^11.1.10",
+    "cookie-parser": "^1.4.7",
+    "reflect-metadata": "^0.2.2"
+  },
   "devDependencies": {
     "@playwright/test": "^1.57.0",
     "@types/cookie-parser": "^1.4.10",