fix: parse sender email properly & show confirmation tag clearly

- Use email.utils.parseaddr() to extract pure email from sender
  field (was passing raw 'Name <email>' to SMTP, causing 550 error)
- AI reply selection now shows confirmation status as bold tag
  on its own line for better visibility

src/tg_bot.py

@@ -1,8 +1,8 @@
 import json
 import logging
+from email.utils import parseaddr
 import requests
 from src.config import TelegramConfig, Config
-# reply suggestions come embedded in summary_data from summarize_email
 from src.smtp_client import send_reply
 from src.retry import retry
 
@@ -230,8 +230,8 @@ def _handle_callback(tg_cfg: TelegramConfig, cfg: Config, cb: dict):
 
         text = "*AI 建议回复，请选择：*\n\n"
         for i, s in enumerate(suggestions, 1):
-            tag = "✅ 可直接发送" if s.get("is_simple") else "📝 需确认"
-            text += f"{i}\\. {_escape(s['text'])}  _{tag}_\n"
+            tag = "✅ 无需确认" if s.get("is_simple") else "📝 需确认后发送"
+            text += f"{i}\\. {_escape(s['text'])}\n   *{tag}*\n"
         _tg_req(tg_cfg, "editMessageText", {
             "chat_id": chat_id, "message_id": msg_id,
             "text": text, "parse_mode": "MarkdownV2",
@@ -308,6 +308,8 @@ def _do_send_reply(tg_cfg: TelegramConfig, cfg: Config,
     if not acct.smtp:
         send_text(tg_cfg, str(chat_id), "❌ 该邮箱未配置 SMTP，无法发送回复。")
         return
-    to_addr = ctx["sender"]
+    to_addr = parseaddr(ctx["sender"])[1]
+    if not to_addr:
+        to_addr = ctx["sender"]
     subject = ctx["subject"]
     send_reply(acct, to_addr, subject, reply_text)