fix: send AI suggestion as MarkdownV2 code block for copy-on-tap

src/tg_bot.py

@@ -385,10 +385,13 @@ def _handle_callback(tg_cfg: TelegramConfig, cfg: Config, cb: dict):
         sel_text = sel["text"]
         logger.info("  选择回复 #%d: %s", idx, sel_text[:60])
 
-        # 用代码块显示，点击可复制
+        # 用代码块显示，点击可复制（MarkdownV2）
         escaped = sel_text.replace("\\", "\\\\").replace("`", "\\`")
-        copy_msg = send_text(tg_cfg, str(chat_id),
-                             f"*建议回复（点击代码块复制）:*\n`{escaped}`")
+        _tg_req(tg_cfg, "sendMessage", {
+            "chat_id": str(chat_id),
+            "text": f"*建议回复（点击代码块复制）:*\n`{escaped}`",
+            "parse_mode": "MarkdownV2",
+        })
 
         # 进入 awaiting_reply 状态，用户可编辑后发送
         prompt_msg_id = send_text(