feat: moved LLMConfigs from User to SearchSpaces

- RBAC soon??
- Updated various services and routes to handle search space-specific LLM preferences.
- Modified frontend components to pass search space ID for LLM configuration management.
- Removed onboarding page and settings page as part of the refactor.

surfsense_backend/app/routes/chats_routes.py

@@ -17,19 +17,17 @@ from app.tasks.stream_connector_search_results import stream_connector_search_re
 from app.users import current_active_user
 from app.utils.check_ownership import check_ownership
 from app.utils.validators import (
-    validate_search_space_id,
-    validate_document_ids,
     validate_connectors,
+    validate_document_ids,
+    validate_messages,
     validate_research_mode,
     validate_search_mode,
-    validate_messages,
+    validate_search_space_id,
 )
 
 router = APIRouter()
 
 
-
-
 @router.post("/chat")
 async def handle_chat_data(
     request: AISDKChatRequest,
@@ -38,20 +36,22 @@ async def handle_chat_data(
 ):
     # Validate and sanitize all input data
     messages = validate_messages(request.messages)
-    
+
     if messages[-1]["role"] != "user":
         raise HTTPException(
             status_code=400, detail="Last message must be a user message"
         )
 
     user_query = messages[-1]["content"]
-    
+
     # Extract and validate data from request
     request_data = request.data or {}
     search_space_id = validate_search_space_id(request_data.get("search_space_id"))
     research_mode = validate_research_mode(request_data.get("research_mode"))
     selected_connectors = validate_connectors(request_data.get("selected_connectors"))
-    document_ids_to_add_in_context = validate_document_ids(request_data.get("document_ids_to_add_in_context"))
+    document_ids_to_add_in_context = validate_document_ids(
+        request_data.get("document_ids_to_add_in_context")
+    )
     search_mode_str = validate_search_mode(request_data.get("search_mode"))
 
     # Check if the search space belongs to the current user
@@ -132,21 +132,16 @@ async def read_chats(
     # Validate pagination parameters
     if skip < 0:
         raise HTTPException(
-            status_code=400,
-            detail="skip must be a non-negative integer"
+            status_code=400, detail="skip must be a non-negative integer"
         )
-    
+
     if limit <= 0 or limit > 1000:  # Reasonable upper limit
-        raise HTTPException(
-            status_code=400,
-            detail="limit must be between 1 and 1000"
-        )
-    
+        raise HTTPException(status_code=400, detail="limit must be between 1 and 1000")
+
     # Validate search_space_id if provided
     if search_space_id is not None and search_space_id <= 0:
         raise HTTPException(
-            status_code=400,
-            detail="search_space_id must be a positive integer"
+            status_code=400, detail="search_space_id must be a positive integer"
         )
     try:
         # Select specific fields excluding messages