feat: interactive inline buttons, SMTP reply, AI reply suggestions

- Inline keyboard: view original / back to summary toggle per message
- SMTP config per account for sending replies
- Reply button: click, type message, auto-send via SMTP
- AI Reply button: generates 3 suggestions via DeepSeek
  - Simple replies (OK, Got it) send immediately on tap
  - Substantive replies require confirm before send
  - Hides AI Reply button when AI determines reply unnecessary
- Telegram long polling integrated into main loop for real-time interaction

src/summarizer.py

@@ -2,20 +2,20 @@ import logging
 from src.config import Config
 from src.email_client import fetch_unseen_emails, mark_as_seen
 from src.ai_client import summarize_email
-from src.tg_bot import send_message, format_summary
+from src.tg_bot import send_summary, format_summary
 
 logger = logging.getLogger(__name__)
 
 
 def process_all(cfg: Config):
-    for acct in cfg.email_accounts:
+    for idx, acct in enumerate(cfg.email_accounts):
         try:
-            _process_account(cfg, acct)
+            _process_account(cfg, acct, idx)
         except Exception as e:
             logger.error(f"处理邮箱 {acct.username} 时出错: {e}", exc_info=True)
 
 
-def _process_account(cfg: Config, acct):
+def _process_account(cfg: Config, acct, acct_idx: int):
     logger.info(f"检查邮箱: {acct.username}")
     emails = fetch_unseen_emails(acct)
 
@@ -32,7 +32,7 @@ def _process_account(cfg: Config, acct):
             summary = summarize_email(cfg.ai, acct.username, mail.subject, mail.sender, mail.body)
             summary["recipient"] = acct.username
             text = format_summary(summary)
-            send_message(cfg.telegram, text)
+            send_summary(cfg.telegram, cfg.telegram.chat_id, text, summary, mail.body, acct_idx)
             seen_uids.append(mail.uid)
             logger.info(f"  已发送到 Telegram")
         except Exception as e: