Add Flask API endpoints and testing scripts for safety analysis

- Created requirements.txt for Flask and related libraries.
- Implemented test_api.py to validate API endpoints including health check, weather data retrieval, crash analysis, route finding, and single route fetching.
- Developed test_crash_endpoint.py for focused testing on crash analysis endpoint.
- Added test_flask_endpoints.py for lightweight tests using Flask's test client with mocked dependencies.
- Introduced SafetyAnalysisModal component in the frontend for displaying detailed safety analysis results.
- Implemented flaskApi.ts to handle API requests for weather data and crash analysis, including data transformation to match frontend interfaces.

llm/test_crash_endpoint.py

@@ -0,0 +1,126 @@
+#!/usr/bin/env python3
+"""
+Quick test script for the crash analysis endpoint
+"""
+
+import requests
+import json
+
+def test_crash_analysis():
+    """Test the crash analysis endpoint"""
+    
+    url = "http://localhost:5001/api/analyze-crashes"
+    
+    # Test data - Washington DC coordinates
+    payload = {
+        "lat": 38.9072,
+        "lon": -77.0369,
+        "radius": 1.0
+    }
+    
+    headers = {
+        "Content-Type": "application/json"
+    }
+    
+    print("🧪 Testing Crash Analysis Endpoint")
+    print("=" * 50)
+    print(f"URL: {url}")
+    print(f"Payload: {json.dumps(payload, indent=2)}")
+    print(f"Headers: {headers}")
+    print()
+    
+    try:
+        print("📡 Sending request...")
+        response = requests.post(url, json=payload, headers=headers, timeout=30)
+        
+        print(f"📊 Response Status: {response.status_code}")
+        print(f"📋 Response Headers: {dict(response.headers)}")
+        print()
+        
+        if response.status_code == 200:
+            data = response.json()
+            if data.get('success'):
+                print("✅ SUCCESS! Crash analysis endpoint is working!")
+                print()
+                print("📈 Results Summary:")
+                crash_summary = data.get('crash_summary', {})
+                print(f"  • Total crashes: {crash_summary.get('total_crashes', 'N/A')}")
+                print(f"  • Average distance: {crash_summary.get('avg_distance_km', 'N/A')} km")
+                print(f"  • Total casualties: {crash_summary.get('total_casualties', 'N/A')}")
+                
+                weather = data.get('weather', {})
+                print(f"  • Weather: {weather.get('summary', 'N/A')}")
+                
+                safety_analysis = data.get('safety_analysis', '')
+                print(f"  • Safety analysis length: {len(safety_analysis)} characters")
+                
+                raw_crashes = data.get('raw_crashes', [])
+                print(f"  • Sample crashes returned: {len(raw_crashes)}")
+                
+                return True
+            else:
+                print(f"❌ API returned success=False: {data.get('error', 'Unknown error')}")
+                return False
+                
+        else:
+            print(f"❌ HTTP Error {response.status_code}")
+            try:
+                error_data = response.json()
+                print(f"Error details: {error_data}")
+            except:
+                print(f"Response text: {response.text}")
+            return False
+            
+    except requests.exceptions.ConnectionError:
+        print("❌ Connection Error: Cannot connect to Flask server")
+        print("   Make sure the Flask server is running on http://localhost:5001")
+        print("   Start it with: cd llm && python api/flask_server.py")
+        return False
+        
+    except requests.exceptions.Timeout:
+        print("❌ Timeout Error: Request took too long (>30 seconds)")
+        print("   This might be normal for the first request as it loads data")
+        return False
+        
+    except Exception as e:
+        print(f"❌ Unexpected Error: {e}")
+        return False
+
+def test_health_first():
+    """Test health endpoint first to make sure server is running"""
+    try:
+        response = requests.get("http://localhost:5001/api/health", timeout=5)
+        if response.status_code == 200:
+            data = response.json()
+            print("✅ Health check passed")
+            print(f"  • MongoDB connected: {data.get('mongodb_connected')}")
+            print(f"  • Route analyzer ready: {data.get('route_analyzer_ready')}")
+            return True
+        else:
+            print(f"❌ Health check failed: {response.status_code}")
+            return False
+    except Exception as e:
+        print(f"❌ Health check error: {e}")
+        return False
+
+if __name__ == "__main__":
+    print("🚀 Flask Server Crash Analysis Test")
+    print("=" * 60)
+    
+    # Test health first
+    if not test_health_first():
+        print("\n💡 Server not responding. Start it with:")
+        print("   cd /Users/shivapochampally/Documents/competitions/VTHacks13/llm")
+        print("   python api/flask_server.py")
+        exit(1)
+    
+    print()
+    
+    # Test crash analysis
+    success = test_crash_analysis()
+    
+    print("\n" + "=" * 60)
+    if success:
+        print("🎉 All tests passed! Your crash analysis endpoint is working perfectly!")
+    else:
+        print("❌ Test failed. Check the error messages above.")