feat(telegram): wire replyToMode config, add forum topic support, fix messaging tool duplicates

Changes:
- Default replyToMode from "off" to "first" for better threading UX
- Add messageThreadId and replyToMessageId params for forum topic support
- Add messaging tool duplicate detection to suppress redundant block replies
- Add sendMessage action to telegram tool schema
- Add @grammyjs/types devDependency for proper TypeScript typing
- Remove @ts-nocheck and fix all type errors in send.ts
- Add comprehensive docs/telegram.md documentation
- Add PR-326-REVIEW.md with John Carmack-level code review

Test coverage:
- normalizeTextForComparison: 5 cases
- isMessagingToolDuplicate: 7 cases
- sendMessageTelegram thread params: 5 cases
- handleTelegramAction sendMessage: 4 cases
- Forum topic isolation: 4 cases

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/telegram/send.test.ts

@@ -157,6 +157,140 @@ describe("sendMessageTelegram", () => {
     });
     expect(res.messageId).toBe("9");
   });
+
+  it("includes message_thread_id for forum topic messages", async () => {
+    const chatId = "-1001234567890";
+    const sendMessage = vi.fn().mockResolvedValue({
+      message_id: 55,
+      chat: { id: chatId },
+    });
+    const api = { sendMessage } as unknown as {
+      sendMessage: typeof sendMessage;
+    };
+
+    await sendMessageTelegram(chatId, "hello forum", {
+      token: "tok",
+      api,
+      messageThreadId: 271,
+    });
+
+    expect(sendMessage).toHaveBeenCalledWith(chatId, "hello forum", {
+      parse_mode: "Markdown",
+      message_thread_id: 271,
+    });
+  });
+
+  it("includes reply_to_message_id for threaded replies", async () => {
+    const chatId = "123";
+    const sendMessage = vi.fn().mockResolvedValue({
+      message_id: 56,
+      chat: { id: chatId },
+    });
+    const api = { sendMessage } as unknown as {
+      sendMessage: typeof sendMessage;
+    };
+
+    await sendMessageTelegram(chatId, "reply text", {
+      token: "tok",
+      api,
+      replyToMessageId: 100,
+    });
+
+    expect(sendMessage).toHaveBeenCalledWith(chatId, "reply text", {
+      parse_mode: "Markdown",
+      reply_to_message_id: 100,
+    });
+  });
+
+  it("includes both thread and reply params for forum topic replies", async () => {
+    const chatId = "-1001234567890";
+    const sendMessage = vi.fn().mockResolvedValue({
+      message_id: 57,
+      chat: { id: chatId },
+    });
+    const api = { sendMessage } as unknown as {
+      sendMessage: typeof sendMessage;
+    };
+
+    await sendMessageTelegram(chatId, "forum reply", {
+      token: "tok",
+      api,
+      messageThreadId: 271,
+      replyToMessageId: 500,
+    });
+
+    expect(sendMessage).toHaveBeenCalledWith(chatId, "forum reply", {
+      parse_mode: "Markdown",
+      message_thread_id: 271,
+      reply_to_message_id: 500,
+    });
+  });
+
+  it("preserves thread params in plain text fallback", async () => {
+    const chatId = "-1001234567890";
+    const parseErr = new Error(
+      "400: Bad Request: can't parse entities: Can't find end of the entity",
+    );
+    const sendMessage = vi
+      .fn()
+      .mockRejectedValueOnce(parseErr)
+      .mockResolvedValueOnce({
+        message_id: 60,
+        chat: { id: chatId },
+      });
+    const api = { sendMessage } as unknown as {
+      sendMessage: typeof sendMessage;
+    };
+
+    const res = await sendMessageTelegram(chatId, "_bad markdown_", {
+      token: "tok",
+      api,
+      messageThreadId: 271,
+      replyToMessageId: 100,
+    });
+
+    // First call: with Markdown + thread params
+    expect(sendMessage).toHaveBeenNthCalledWith(1, chatId, "_bad markdown_", {
+      parse_mode: "Markdown",
+      message_thread_id: 271,
+      reply_to_message_id: 100,
+    });
+    // Second call: plain text BUT still with thread params (critical!)
+    expect(sendMessage).toHaveBeenNthCalledWith(2, chatId, "_bad markdown_", {
+      message_thread_id: 271,
+      reply_to_message_id: 100,
+    });
+    expect(res.messageId).toBe("60");
+  });
+
+  it("includes thread params in media messages", async () => {
+    const chatId = "-1001234567890";
+    const sendPhoto = vi.fn().mockResolvedValue({
+      message_id: 58,
+      chat: { id: chatId },
+    });
+    const api = { sendPhoto } as unknown as {
+      sendPhoto: typeof sendPhoto;
+    };
+
+    loadWebMedia.mockResolvedValueOnce({
+      buffer: Buffer.from("fake-image"),
+      contentType: "image/jpeg",
+      fileName: "photo.jpg",
+    });
+
+    await sendMessageTelegram(chatId, "photo in topic", {
+      token: "tok",
+      api,
+      mediaUrl: "https://example.com/photo.jpg",
+      messageThreadId: 99,
+    });
+
+    expect(sendPhoto).toHaveBeenCalledWith(chatId, expect.anything(), {
+      caption: "photo in topic",
+      message_thread_id: 99,
+    });
+  });
 });
 
 describe("reactMessageTelegram", () => {