Add models and routes initialization for chat functionality

backend/models.py

@@ -0,0 +1,26 @@
+from pydantic import BaseModel
+from typing import List, Dict, Any
+
+
+class ChatMessage(BaseModel):
+    message: str
+
+
+class ChatResponse(BaseModel):
+    response: str
+    citations: List[Dict[str, Any]]
+    themes: Dict[str, Any]
+    timestamp: str
+
+
+class ProcessingStats(BaseModel):
+    total_files: int
+    total_documents: int
+    total_chunks: int
+    file_types: List[str]
+    type_counts: Dict[str, int]
+    processed_at: str
+
+
+class APIKeyRequest(BaseModel):
+    api_key: str

backend/routes/__init__.py

@@ -0,0 +1,12 @@
+import os
+import sys
+
+# Add parent directory to path for imports
+sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
+
+from .main_routes import router as main_router
+from .upload_routes import router as upload_router
+from .chat_routes import router as chat_router
+from .store_routes import router as store_router
+
+__all__ = ["main_router", "upload_router", "chat_router", "store_router"]