refactor: update API endpoint paths to remove trailing slashes

- Modified various FastAPI route definitions to remove trailing slashes for consistency across the application.
- Updated corresponding fetch calls in the frontend to align with the new endpoint structure.
- Ensured that all affected routes maintain their functionality without trailing slashes.

surfsense_web/hooks/use-chat.ts

@@ -90,7 +90,7 @@ export function useChatAPI({ token, search_space_id }: UseChatAPIProps) {
 
 			try {
 				const response = await fetch(
-					`${process.env.NEXT_PUBLIC_FASTAPI_BACKEND_URL}/api/v1/chats/`,
+					`${process.env.NEXT_PUBLIC_FASTAPI_BACKEND_URL}/api/v1/chats`,
 					{
 						method: "POST",
 						headers: {