4 size modes cycled via expand button in header:
- Compact: 360px (default, bottom-right corner)
- Half-right: 50vw docked to right edge, full height
- Half-left: 50vw docked to left edge, full height
- Full: 100% viewport overlay
Also fixes text overflow in chat messages (overflow-wrap, word-break).
Messages area expands to fill available height in larger modes.
Size button uses mdi icons: arrow-expand, dock-right, dock-left, arrow-collapse.
CSS transitions for smooth size changes.
juanatsap
5448c3cf7a