Closing a book within the SYNC_PROGRESS_INTERVAL_SEC (3s) auto-sync
debounce window saved progress locally but dropped the pending Readest
cloud push on teardown. The `sync-book-progress` close handler only
reset the pull gate and re-pulled — it never pushed — so other devices
stayed on the previous cloud-synced position until the book was
reopened (issue #4532).
Flush the debounced push at the start of `handleSyncBookProgress`,
before the pull gate is reset, so the latest local position reaches the
cloud before the view tears down. `syncConfig` reads `configPulled`
synchronously, so flushing while the gate is still open takes the push
branch. Mirrors the existing KOSync close-time `pushProgress.flush()`.
The manual Sync button shares the event and now becomes a true two-way
sync (push local, then pull remote).
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Huang Xin
1a85f251c0