Add comprehensive performance monitoring and testing infrastructure

- Implement performance dashboard with real-time metrics tracking
- Add React hooks for smart polling, debouncing, and active source lookup
- Create Jest testing framework with comprehensive test suites for components, API endpoints, and utilities
- Enhance UI components with optimized rendering and memoization
- Improve polling efficiency with visibility detection and adaptive intervals

🤖 Generated with [Claude Code](https://claude.ai/code)

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

package.json

@@ -8,6 +8,10 @@
     "start": "next start",
     "lint": "next lint",
     "type-check": "tsc --noEmit",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:coverage": "jest --coverage",
+    "test:ci": "jest --coverage --watchAll=false",
     "create-sat-summer-2025-tables": "tsx scripts/createSatSummer2025Tables.ts"
   },
   "dependencies": {
@@ -23,6 +27,10 @@
   },
   "devDependencies": {
     "@tailwindcss/forms": "^0.5.10",
+    "@testing-library/jest-dom": "^6.6.3",
+    "@testing-library/react": "^16.3.0",
+    "@testing-library/user-event": "^14.6.1",
+    "@types/jest": "^30.0.0",
     "@types/node": "^22.13.1",
     "@types/react": "^19.0.8",
     "@types/react-dom": "^19.0.3",
@@ -30,8 +38,11 @@
     "eslint": "^9.20.0",
     "eslint-config-next": "^15.4.1",
     "eslint-config-prettier": "^10.0.1",
+    "jest": "^30.0.4",
+    "jest-environment-jsdom": "^30.0.4",
     "postcss": "^8.5.1",
     "tailwindcss": "^4.0.0",
+    "ts-jest": "^29.4.0",
     "tsx": "^4.20.3",
     "typescript": "^5.8.3"
   }