test: add comprehensive test suite (Go unit/integration, Vitest, Playwright E2E)

- Add JWT middleware unit tests (8 tests covering all auth edge cases)
- Add WebSocket hub tests (5 tests for client lifecycle and broadcast)
- Add full HTTP integration tests (12 tests through real Chi router with DB)
- Add frontend component tests for login, issues, and issue detail pages
- Add auth context unit tests (9 tests for login/logout/name resolution)
- Add Playwright E2E tests for auth, issues, comments, and navigation
- Configure Vitest with jsdom, React plugin, and path aliases

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/package.json

@@ -8,7 +8,8 @@
     "build": "next build",
     "start": "next start",
     "typecheck": "tsc --noEmit",
-    "lint": "next lint"
+    "lint": "next lint",
+    "test": "vitest run"
   },
   "dependencies": {
     "@dnd-kit/core": "^6.3.1",
@@ -28,9 +29,15 @@
   },
   "devDependencies": {
     "@tailwindcss/postcss": "catalog:",
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
     "@types/react": "catalog:",
     "@types/react-dom": "catalog:",
+    "@vitejs/plugin-react": "^6.0.1",
+    "jsdom": "^29.0.1",
     "tailwindcss": "catalog:",
-    "typescript": "catalog:"
+    "typescript": "catalog:",
+    "vitest": "^4.1.0"
   }
 }