fix(discord): send initial message for non-forum thread creation (#18117)

Co-authored-by: Shadow <shadow@openclaw.ai>

src/discord/send.creates-thread.test.ts

@@ -107,6 +107,61 @@ describe("sendMessageDiscord", () => {
     );
   });
 
+  it("sends initial message for non-forum threads with content", async () => {
+    const { rest, getMock, postMock } = makeDiscordRest();
+    getMock.mockResolvedValue({ type: ChannelType.GuildText });
+    postMock.mockResolvedValue({ id: "t1" });
+    await createThreadDiscord(
+      "chan1",
+      { name: "thread", content: "Hello thread!" },
+      { rest, token: "t" },
+    );
+    expect(postMock).toHaveBeenCalledTimes(2);
+    // First call: create thread
+    expect(postMock).toHaveBeenNthCalledWith(
+      1,
+      Routes.threads("chan1"),
+      expect.objectContaining({
+        body: expect.objectContaining({ name: "thread", type: ChannelType.PublicThread }),
+      }),
+    );
+    // Second call: send message to thread
+    expect(postMock).toHaveBeenNthCalledWith(
+      2,
+      Routes.channelMessages("t1"),
+      expect.objectContaining({
+        body: { content: "Hello thread!" },
+      }),
+    );
+  });
+
+  it("sends initial message for message-attached threads with content", async () => {
+    const { rest, getMock, postMock } = makeDiscordRest();
+    postMock.mockResolvedValue({ id: "t1" });
+    await createThreadDiscord(
+      "chan1",
+      { name: "thread", messageId: "m1", content: "Discussion here" },
+      { rest, token: "t" },
+    );
+    // Should not detect channel type for message-attached threads
+    expect(getMock).not.toHaveBeenCalled();
+    expect(postMock).toHaveBeenCalledTimes(2);
+    // First call: create thread from message
+    expect(postMock).toHaveBeenNthCalledWith(
+      1,
+      Routes.threads("chan1", "m1"),
+      expect.objectContaining({ body: { name: "thread" } }),
+    );
+    // Second call: send message to thread
+    expect(postMock).toHaveBeenNthCalledWith(
+      2,
+      Routes.channelMessages("t1"),
+      expect.objectContaining({
+        body: { content: "Discussion here" },
+      }),
+    );
+  });
+
   it("lists active threads by guild", async () => {
     const { rest, getMock } = makeDiscordRest();
     getMock.mockResolvedValue({ threads: [] });