feat: Add comprehensive E2E tests with Playwright and enhance component test IDs

Add end-to-end testing infrastructure for the application:
- Implemented Playwright E2E test suite with 31 passing tests across authentication and feature workflows
- Created mock API fixtures for testing without requiring backend/database
- Added data-testid attributes to major React components (Login, Register, TaskList, Events, SocialFeed, Profile, Navbar)
- Set up test fixtures with test images (profile-pic.jpg, test-image.jpg)
- Configured playwright.config.js for multi-browser testing (Chromium, Firefox, Safari)

Test Coverage:
- Authentication flows (register, login, logout, protected routes)
- Task management (view, complete, filter, search)
- Social feed (view posts, create post, like, view comments)
- Events (view, join/RSVP, filter, view details)
- User profile (view profile, streets, badges, statistics)
- Premium features page
- Leaderboard and rankings
- Map view

🤖 Generated with OpenCode

Co-Authored-By: AI Assistant <noreply@ai-assistant.com>

package-lock.json

@@ -7,6 +7,9 @@
       "dependencies": {
         "mongoose": "^8.19.2",
         "nodemailer": "^7.0.10"
+      },
+      "devDependencies": {
+        "@playwright/test": "^1.57.0"
       }
     },
     "node_modules/@mongodb-js/saslprep": {
@@ -18,6 +21,22 @@
         "sparse-bitfield": "^3.0.3"
       }
     },
+    "node_modules/@playwright/test": {
+      "version": "1.57.0",
+      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.57.0.tgz",
+      "integrity": "sha512-6TyEnHgd6SArQO8UO2OMTxshln3QMWBtPGrOCgs3wVEmQmwyuNtB10IZMfmYDE0riwNR1cu4q+pPcxMVtaG3TA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright": "1.57.0"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@types/webidl-conversions": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/@types/webidl-conversions/-/webidl-conversions-7.0.3.tgz",
@@ -59,6 +78,21 @@
         }
       }
     },
+    "node_modules/fsevents": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
     "node_modules/kareem": {
       "version": "2.6.3",
       "resolved": "https://registry.npmjs.org/kareem/-/kareem-2.6.3.tgz",
@@ -188,6 +222,38 @@
         "node": ">=6.0.0"
       }
     },
+    "node_modules/playwright": {
+      "version": "1.57.0",
+      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.57.0.tgz",
+      "integrity": "sha512-ilYQj1s8sr2ppEJ2YVadYBN0Mb3mdo9J0wQ+UuDhzYqURwSoW4n1Xs5vs7ORwgDGmyEh33tRMeS8KhdkMoLXQw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright-core": "1.57.0"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "optionalDependencies": {
+        "fsevents": "2.3.2"
+      }
+    },
+    "node_modules/playwright-core": {
+      "version": "1.57.0",
+      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.57.0.tgz",
+      "integrity": "sha512-agTcKlMw/mjBWOnD6kFZttAAGHgi/Nw0CZ2o6JqWSbMlI219lAFLZZCyqByTsvVAJq5XA5H8cA6PrvBRpBWEuQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "playwright-core": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/punycode": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",