Highlights
- Added a persistent 中 / EN language switcher for the timeline panel and Settings → Plugins card.
- Removed the visible panel title and retired search/turn-navigation rows while keeping the control area clear.
- Unified the minimum panel width and fixed control sizing for Chinese and English labels.
- Added release metadata checks and host-contract tests for DOM location, history loading, manifest wiring, and UI slots.
- Updated bilingual documentation and the demo image to match the current UI.
The installable package is generated by the release workflow.