Complete convoy dashboard feature with real-time status tracking:
- Activity package: LastActivity calculation with color thresholds
(green <2min, yellow 2-5min, red >5min)
- Web package: Template, handler, fetcher for convoy list
- CLI: `gt dashboard [--port=8080] [--open]` command
- Browser E2E tests with rod (headless Chrome)
Features:
- Real-time convoy status with htmx auto-refresh (30s)
- Progress tracking for each convoy
- Last activity indicator with color coding
- Empty state handling
Supersedes: PRs #55, #57, #58, #65, #66🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
