- Remove 3-state logic (normal/50%/80%) - now only normal/expanded
- Remove double-click detection and tooltips for simplicity
- Remove platform-specific behavior (same UX for Electron and web)
- Optimize button layout: reduce from 36px to 28px to fit 3 buttons
- Position expand button above history buttons in vertical stack
- Keep 15-line expanded height (360px, capped to available space)
Per upstream dev feedback to keep it simple with one approach
71f58e7c5f