fix: IMAP sync - use imap_uid, add sync queue with retry, restore deleted on sync, upload sent mails

- imap_delete_mail: use stored imap_uid instead of Message-ID search, raise on failure
- imap_move_mail: same imap_uid fix, raise on failure
- New MailSyncQueue model + migration 0007 for pending IMAP operations
- delete_mail route: queues failed IMAP delete for retry
- move_mail route: queues failed IMAP move for retry
- process_sync_queue: retries pending delete/move operations in auto-sync loop
- Auto-sync loop: processes sync queue before pulling new mails
- Restore soft-deleted mails if they still exist on IMAP server during sync
- Upload sent mails to IMAP Sent folder via APPEND after SMTP send
- Plugin version bumped to 1.2.0

app/plugins/builtins/mail/plugin.py

@@ -13,10 +13,18 @@ logger = logging.getLogger(__name__)
 
 
 async def _auto_sync_loop() -> None:
-    """Background loop: sync all active mail accounts every 5 minutes."""
-    from app.plugins.builtins.mail.services import auto_sync_all_accounts
+    """Background loop: process pending sync queue, then sync all active mail accounts every 5 minutes."""
+    from app.plugins.builtins.mail.services import auto_sync_all_accounts, process_sync_queue
+    from app.core.db import get_session_factory
 
     while True:
+        try:
+            factory = get_session_factory()
+            async with factory() as db:
+                await process_sync_queue(db)
+                await db.commit()
+        except Exception as exc:
+            logger.warning("process_sync_queue error: %s", exc)
         try:
             await auto_sync_all_accounts()
         except Exception as exc:
@@ -31,7 +39,7 @@ class MailPlugin(BasePlugin):
 
     manifest = PluginManifest(
         name="mail",
-        version="1.1.0",
+        version="1.2.0",
         display_name="Mail",
         description=(
             "Email management: IMAP sync, SMTP send, threading, "
@@ -46,7 +54,7 @@ class MailPlugin(BasePlugin):
             ),
         ],
         events=[],
-        migrations=["0001_initial.sql", "0006_flag_type.sql"],
+        migrations=["0001_initial.sql", "0006_flag_type.sql", "0007_sync_queue.sql"],
         permissions=["mail:read", "mail:send", "mail:config", "mail:share", "mail:write", "mail:delete"],
     )