Fix login blank screen and progress persistence

- Fix authStore to persist user data, not just isAuthenticated
- Fix progressStore handling of undefined API responses
- Remove minimax.md documentation file
- All progress now properly saves to PostgreSQL
- Login flow working correctly

frontend/package.json

@@ -11,6 +11,7 @@
   },
   "dependencies": {
     "axios": "^1.6.2",
+    "framer-motion": "^12.34.0",
     "lucide-react": "^0.294.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",