What's New
Collapsible Header Panel
- Toggle button (chevron) in the tabs bar hides the header and toolbar
- Only the tabs bar remains visible, maximizing the chat area
- Chevron rotates 180° to indicate collapsed/expanded state
- State persists across page reloads
Font Size Slider
- Range slider (12px – 22px) in the tabs bar
- Adjusts all chat message font sizes in real-time via CSS variable
- Compact design: small "A" → slider → large "A"
- Preference saved to localStorage
Collapsible Large Messages
- Messages taller than 300px auto-collapse to 200px
- Gradient fade overlay at the bottom matches bubble background
- "Show more" / "Show less" toggle button
- Works for both new messages and chat history
- Not applied during streaming — only after message completes
Localization
- All new UI labels translated: Ukrainian, English, Russian
Full Changelog: v5.2.0...v5.3.0