Telegram: Add reply-chain detection to bypass mention requirement (#1038)

* Telegram: add reply-chain detection to bypass mention requirement

* fix: allow telegram reply-chain mention bypass (#1038) (thanks @adityashaw2)

---------

Co-authored-by: Aditya Shaw <aditya@adityashaw.dev>
Co-authored-by: Peter Steinberger <steipete@gmail.com>

src/telegram/bot.test.ts

@@ -952,6 +952,39 @@ describe("createTelegramBot", () => {
     expect(replySpy).not.toHaveBeenCalled();
   });
 
+  it("accepts group replies to the bot without explicit mention when requireMention is enabled", async () => {
+    onSpy.mockReset();
+    const replySpy = replyModule.__replySpy as unknown as ReturnType<typeof vi.fn>;
+    replySpy.mockReset();
+    loadConfig.mockReturnValue({
+      channels: {
+        telegram: { groups: { "*": { requireMention: true } } },
+      },
+    });
+
+    createTelegramBot({ token: "tok" });
+    const handler = getOnHandler("message") as (ctx: Record<string, unknown>) => Promise<void>;
+
+    await handler({
+      message: {
+        chat: { id: 456, type: "group", title: "Ops Chat" },
+        text: "following up",
+        date: 1736380800,
+        reply_to_message: {
+          message_id: 42,
+          text: "original reply",
+          from: { id: 999, first_name: "Clawdbot" },
+        },
+      },
+      me: { id: 999, username: "clawdbot_bot" },
+      getFile: async () => ({ download: async () => new Uint8Array() }),
+    });
+
+    expect(replySpy).toHaveBeenCalledTimes(1);
+    const payload = replySpy.mock.calls[0][0];
+    expect(payload.WasMentioned).toBe(true);
+  });
+
   it("honors routed group activation from session store", async () => {
     onSpy.mockReset();
     const replySpy = replyModule.__replySpy as unknown as ReturnType<typeof vi.fn>;