replace imperative fetch with tanstak

surfsense_web/hooks/use-chat.ts

@@ -45,57 +45,3 @@ export function useChatState({ chat_id }: UseChatStateProps) {
 		setTopK,
 	};
 }
-
-interface UseChatAPIProps {
-	token: string | null;
-	search_space_id: string;
-}
-
-export function useChatAPI({ token, search_space_id }: UseChatAPIProps) {
-	const updateChat = useCallback(
-		async (
-			chatId: string,
-			messages: Message[],
-			researchMode: ResearchMode,
-			selectedConnectors: string[]
-		) => {
-			if (!token) return;
-
-			try {
-				const userMessages = messages.filter((msg) => msg.role === "user");
-				if (userMessages.length === 0) return;
-
-				const title = userMessages[0].content;
-
-				const response = await fetch(
-					`${process.env.NEXT_PUBLIC_FASTAPI_BACKEND_URL}/api/v1/chats/${Number(chatId)}`,
-					{
-						method: "PUT",
-						headers: {
-							"Content-Type": "application/json",
-							Authorization: `Bearer ${token}`,
-						},
-						body: JSON.stringify({
-							type: researchMode,
-							title: title,
-							initial_connectors: selectedConnectors,
-							messages: messages,
-							search_space_id: Number(search_space_id),
-						}),
-					}
-				);
-
-				if (!response.ok) {
-					throw new Error(`Failed to update chat: ${response.statusText}`);
-				}
-			} catch (err) {
-				console.error("Error updating chat:", err);
-			}
-		},
-		[token, search_space_id]
-	);
-
-	return {
-		updateChat,
-	};
-}