添加聊天框消息解析功能；优化请求头处理；更新部分 api base url

src/lib/chatStream.test.ts

@@ -54,6 +54,15 @@ describe("streamCopilotChat", () => {
       onEvent: (event) => events.push(event),
     });
 
+    expect(apiFetch).toHaveBeenCalledWith(
+      expect.stringContaining("/api/v1/copilot/chat/stream"),
+      expect.objectContaining({
+        method: "POST",
+        projectHeaderMode: "include",
+        skipAuthRedirect: true,
+      }),
+    );
+
     expect(events).toEqual([
       { type: "token", conversationId: "c1", content: "he" },
       { type: "token", conversationId: "c1", content: "llo" },