feat: Add tree file view for git status, AgentBar dock, and settings updates

- Add StatusTree component with collapsible directory hierarchy for staged/unstaged/untracked files
- Replace flat file lists in GitPage with tree view showing file type icons and git status badges
- Add AgentBar arc dock with per-agent terminal frame and voice modal
- Update ejecutor settings with hooks for claude-status reporting

server/routes/claude-status.ts

@@ -18,6 +18,7 @@ type ClaudeStatus =
 interface ClaudeStatusPayload {
   status: ClaudeStatus
   tool?: string
+  agent?: string
 }
 
 export async function handleClaudeStatus(req: Request): Promise<Response | null> {