Build 26610038

Added

Todo items support scheduled reminders: each todo can be assigned a reminder time, with quick options for **10 minutes later / 1 hour later / 9:00 tomorrow** and custom date & time.
Trigger Windows system notifications when the time is due. A reminder timestamp badge is shown on the entry, and the item is marked as **Reminded** once triggered.
Reminders are scheduled by a persistent backend service. Alerts work even when the sidebar is closed. Todos and reminder settings are persisted and restored automatically after restart.
Each reminder fires only once. Completed todos will not trigger reminders, and expired reminders older than 12 hours will not be resent.
Reminder texts localized into 8 languages: Simplified Chinese, Traditional Chinese, English, Japanese, Korean, German, Russian, Vietnamese.

Fixed

Bluetooth list now only shows actively connected devices; previously paired saved devices are no longer displayed as connected.
Fixed process crash caused by truncated 64-bit handles during Bluetooth toggle state detection.
Fixed UI stuck in "Converting" status after format conversion finishes. Conversion results are now dispatched to the GUI thread via cross-thread signals, so success and failure states display correctly.