- Replace all bg-[color:var(--old)] with bg-background/bg-card/bg-muted/bg-primary etc.
- Replace all text-[color:var(--old)] with text-foreground/text-muted-foreground/text-primary etc.
- Replace all border-[color:var(--line)] with border-border
- Replace all inline var(--old) with var(--new) equivalents
- Replace all rounded-[6px]/rounded-[8px] with rounded-lg
- Replace .surface class with bg-card border border-border shadow-sm
- Replace .focus-ring class with focus-visible Tailwind utilities
- Replace .mono class with font-mono
- Replace data-theme attribute with class-based dark mode
- 99 files updated, ~1265 lines changed, zero old references remaining
- CommunicationHub.tsx: main layout shell with sidebar + message area
- ChannelSidebar.tsx: channel list with unread badges and filter bar
- MessageList.tsx: message display with threading and empty states
- MessageItem.tsx: message bubble, task comment bubble, agent avatar
- MessageComposer.tsx: message input, task discussion composer, compose modal
- ChannelHeader.tsx: channel info bar with stats
- channel-utils.ts: shared channel derivation and message filtering logic
- Original communication.tsx replaced with backward-compatible re-exports
- All sub-components under 300 lines, TypeScript compilation passes
ZacharyZhang-NY