Sidebar:
- session-name: 12px → 13px (more prominent with real names)
- session-preview: 13px → 12px, clamp 2 → 3 lines (more content visible)
- session-actions buttons: 26×26px, gap 2px (narrower, more room for info)

Chat header (mobile):
- chat-header-info: column layout on mobile so title and profile badge
  stack vertically (flex-direction: column; align-items: flex-start)

ContextBar:
- Recomposed to single row: [track] [pct%]
- Track 100px → 60px, height 5px → 4px
- Full token counts moved to title attribute (hover tooltip)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>