fix(telegram): normalize chat ids and improve errors

src/telegram/send.test.ts

@@ -32,4 +32,39 @@ describe("sendMessageTelegram", () => {
     expect(res.chatId).toBe(chatId);
     expect(res.messageId).toBe("42");
   });
+
+  it("normalizes chat ids with internal prefixes", async () => {
+    const sendMessage = vi.fn().mockResolvedValue({
+      message_id: 1,
+      chat: { id: "123" },
+    });
+    const api = { sendMessage } as unknown as {
+      sendMessage: typeof sendMessage;
+    };
+
+    await sendMessageTelegram("telegram:123", "hi", {
+      token: "tok",
+      api,
+    });
+
+    expect(sendMessage).toHaveBeenCalledWith("123", "hi", {
+      parse_mode: "Markdown",
+    });
+  });
+
+  it("wraps chat-not-found with actionable context", async () => {
+    const chatId = "123";
+    const err = new Error("400: Bad Request: chat not found");
+    const sendMessage = vi.fn().mockRejectedValue(err);
+    const api = { sendMessage } as unknown as {
+      sendMessage: typeof sendMessage;
+    };
+
+    await expect(
+      sendMessageTelegram(chatId, "hi", { token: "tok", api }),
+    ).rejects.toThrow(/chat not found/i);
+    await expect(
+      sendMessageTelegram(chatId, "hi", { token: "tok", api }),
+    ).rejects.toThrow(/chat_id=123/);
+  });
 });