Address six gaps found during review:
- Fix subreddit name extraction bug (gear icon text in textContent)
- Prevent gear icon layout shift via absolute positioning
- Handle native color picker dialog in click-outside detection
- Make per-subreddit overrides mode-aware (light/dark)
- Replace badge hover opacity with filter: brightness
- Split popover logic into separate file
Co-authored-by: Cursor <cursoragent@cursor.com>
- Use div.thing.link selector to exclude comment nodes
- Fix shared module loading (manifest content_scripts array)
- Add FOUC mitigation via CSS-only manifest injection
- Switch to storage.local to avoid sync quota limits
- Add MutationObserver for RES dark mode toggle detection
- Use fallback chain for MutationObserver target container
- Clarify comment count text handling (zero = "0 comments")
- Simplify teardown to page reload on master toggle
- Expand test checklist to cover new behaviors
Co-authored-by: Cursor <cursoragent@cursor.com>
