- Initialize eventTags object from server-rendered DOM data on page load
- Add fallback in getEventTags() to scrape tags from DOM when cache is undefined
- Optimize updateMainPanelTags with DOM query caching and content change detection
- Remove redundant tag update calls during filtering to improve performance
- Add proper cache invalidation when tags are added/removed
- Only update highlight styling when actually needed during filter mode changes
This resolves the issue where tags would disappear when filtering timeline events
by ensuring the JavaScript tag data is always synchronized with the server-rendered content.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
