/superpowers-gstack:office-hours-track-aware

Track-aware wrapper around gstack's /office-hours. The "right" flow:

1. Run upstream office-hours to completion (it writes design.md)
2. Read design.md, infer track from content
3. Ask platform question if native (one-time per project)
4. Write .gstack/track
5. Render + auto-open DESIGN.html in Safari before approval
6. Ask approval question (Approve / Revise / Restart) after user has read
7. On approval + native: suggest swiftui-design-consultation

Phase 0 — Setup

Step 0.0: Initialize $SLUG via gstack-slug

Same pattern as swiftui-design-consultation (defensive fallback):