* feat(android): add D-pad navigation for Android TV remote controller
Add basic D-pad/arrow key navigation support for Android TV Bluetooth
remote controllers, covering the full flow: library grid browsing,
reader page turning, toolbar interaction, and TTS toggle.
Library:
- Custom spatial navigation hook for grid D-pad navigation
- Arrow keys move between BookshelfItem elements with auto column detection
- ArrowDown from header enters the bookshelf grid
Reader:
- Enter key toggles header/footer toolbar visibility
- Left/Right navigate between toolbar buttons, Up/Down moves between
header and footer bars
- Back button dismisses toolbar (with blur) before sidebar/library
- Focus-probe technique for reliable button visibility detection
across fixed/hidden containers
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix: only auto-focus toolbar buttons on keyboard activation, not mouse hover
Track pointer activity to distinguish keyboard vs mouse toolbar activation.
When the toolbar appears due to mouse hover, skip auto-focus to prevent
unwanted focus outlines on desktop.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix: track keyboard events instead of pointer events for auto-focus guard
Pointer events from iframes don't bubble to the main document, so
tracking pointermove/pointerdown missed hover interactions over book
content. Track keydown instead — auto-focus only when a recent keyboard
event (Enter key) triggered the toolbar, not mouse hover.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Huang Xin