feat(trail-boss): phase 5 - Presentation layer
Complete the presentation layer with popup queue picker, keybindings,
and status-line segment.
Changes:
- bin/trailboss-popup: Rewritten with python3 JSON parsing, box drawing UI,
and index-based selection that navigates directly to chosen pane
- bin/trailboss-status: Status-line segment showing "⚠ N" when stuck
- tmux.conf: Keybindings for Next (prefix+Tab), Skip (prefix+s), Popup (prefix+g)
- test-presentation.sh: Phase 5 exit criterion tests (all passing)
Verified: CLI commands work, popup lists queue with selection, status shows
stuck count, keybindings configured.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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