Rewrite README: consolidate tray sections, add patch table, clean structure

Add desktop overlay with line diff viewer and agent pane manager

Optimize launcher startup: background config, PID-file tray check, V8 cache

Fix tray PID handling: use pidfile instead of pgrep

Disable Electron tray on Linux, remove Unity XDG hack

Update repo URLs after rename to claude-code-desktop-arch

CI: add pacman-contrib for updpkgsums

CI: run updpkgsums before makepkg (RELEASES checksum changes per release)

Fix CI: use su instead of sudo, add missing deps

Remove Electron tray patches, Python tray handles everything

Replace yad tray with Python AppIndicator3/SNI wrapper

feat(packaging): improve Linux tray and review support

Rewrite README from scratch based on code analysis

Rewrite README from scratch for standalone repo

Update README: based on instead of forked from