Fix input: remove CSS hacks that broke xterm.js native mobile input

Fix input: rewrite PTY backend + force focus on terminal/editor

Add full TUI/PTY terminal support with xterm.js

Complete Android-first UI rebuild with mobile-first design system

Rebuild UI: complete redesign with accessibility, responsiveness, and bug fixes

fix: extract sidebar toggle to function, show truncated prompt text on mobile

feat: upgrade Android responsiveness, SEO, mobile UX across all frontend files

feat: enhance mobile terminal, live preview imports, and theme settings

style: fix mobile responsiveness for android viewports

Update static/css/terminal.css

Create static/css/terminal.css