Adds todo tracking infrastructure with TodoWrite tool integration to extract
and persist todos in sessions. Refactors ToolCard component to support
custom tool view rendering and displays todo progress in SessionList.
- Display connection status indicators (online, offline, thinking, permission required) in ChatInput with dynamic vibing messages
- Add context size percentage display showing remaining context availability
- Track latest usage data in reducer with inputTokens, outputTokens, cache metrics, and contextSize
- Calculate contextSize from message usage data and expose via latestUsage in reduceChatBlocks
- Pass thinking, agentState, and contextSize props to ChatInput component
- Remove redundant status indicators from SessionHeader (moved to ChatInput for unified display)
Extract word detection and suggestion logic into reusable utilities and hooks.
Add FloatingOverlay and Autocomplete components for intelligent input assistance.
Integrate settings panel and abort button directly into ChatInput component.
Simplify SessionHeader by removing settings dialog (now in ChatInput).
weishu