opencode chat frontend implementation

packages/frontend/src/lib/query/hooks/chat.ts

@@ -0,0 +1,15 @@
+import type { ChatRequest, ChatResponse } from "@sprint/shared";
+import { useMutation } from "@tanstack/react-query";
+import { apiClient } from "@/lib/server";
+
+export function useChatMutation() {
+  return useMutation<ChatResponse, Error, ChatRequest>({
+    mutationKey: ["ai", "chat"],
+    mutationFn: async (input) => {
+      const { data, error } = await apiClient.aiChat({ query: input });
+      if (error) throw new Error(error);
+      if (!data) throw new Error("failed to get chat response");
+      return data as ChatResponse;
+    },
+  });
+}

packages/frontend/src/lib/query/hooks/index.ts

@@ -1,3 +1,4 @@
+export * from "@/lib/query/hooks/chat";
 export * from "@/lib/query/hooks/derived";
 export * from "@/lib/query/hooks/issue-comments";
 export * from "@/lib/query/hooks/issues";