- New Features
- Implement autosave triggered on InsertLeave with a configurable 3‑second debounce.
- Added `clear_timer` helper to cancel pending autosave when entering insert mode.
- Auto‑save now respects buffer validity and modified status before writing.
- Enhancements
- Refactor timer management to avoid overlapping callbacks.
- Use a dedicated augroup for autosave events.
- Bug Fixes
- Remove unused `CursorHoldI` autocmd to prevent double firing.