UX: Add project/branch indicator, real-time task visibility, and multi-agent awareness

Problem

Working across multiple projects with multiple AI agents (Claude Code + Codex), I have no way to know:

1. Which project Claude Code is currently in — no visible indicator of working directory or branch
2. What Claude Code is doing in real-time — no task log or activity feed
3. When other agents (Codex, etc.) are working on the same repo — no coordination between agents, leading to conflicts and file loss (e.g., one agent runs git reset --hard while another has uncommitted work)

Impact

• Files lost permanently due to agents overwriting each other's work
• Wrong project modified due to no clear working directory indicator
• No audit trail to know which agent caused a destructive action

Suggested Improvements

• Show current working directory + branch prominently in UI at all times
• Show real-time activity log of commands being run
• Detect when another agent is active on the same repo and warn the user
• Coordinate or lock before running destructive git operations