- MobileChatView: full-screen mobile chat using 100dvh, back button, safe-area input
- ChatPanel: conditionally renders MobileChatView on mobile via useMediaQuery
- ChatConversationList: wraps ScrollArea in PullToRefresh for mobile
- ChatInput: pb-[env(safe-area-inset-bottom)] padding + 44px Send button touch target
- ChatConversationItem: min-h-[48px] touch target per UI-SPEC
- Add enableVoiceInput prop to ChatInput props interface
- Add handleTranscription callback that appends transcription text to textarea state
- Render VoiceRecordButton conditionally when enableVoiceInput is true
- Pass enableVoiceInput={true} from ChatPanel to ChatInput
- Mark INPUT-02, INPUT-03, INPUT-04 as Complete in REQUIREMENTS.md traceability table
- Create ChatFileDropZone component with drag-and-drop state and overlay
- Add onFilesPicked/pendingFiles/onRemoveFile props to ChatInput
- Wrap form in ChatFileDropZone for drag-and-drop support
- Add handlePaste for clipboard image paste (clipboardData.files)
- Add Paperclip icon button with hidden file input for file picker
- Show pending file chips above textarea with progress and remove button
- Add tests: renders file attach button, calls onFilesPicked, shows pending chips
- ChatPanel integrates useStreamingChat, ChatAgentSelector, ChatStopButton
- Agent routing via resolveAgentFromContent for slash commands and @mentions
- handleEdit: editMessage + truncateMessagesAfter + re-stream with edited content
- handleRetry: finds actual prior user message, truncates from user message onward, re-streams
- Build agentMap from agents for message identity bars
- ChatInput: slash command popover (triggered by / at start of input)
- ChatInput: @mention popover (triggered by @word pattern)
- Input disabled during streaming with 'Waiting for response...' placeholder
- Stop button shown conditionally when isStreaming
- Agent selector in header for per-conversation agent switching
- Remove ScrollArea wrapper (replaced by virtualizer's own scroll in ChatMessageList)
