- DemoCraftClient in demo.py: duck-typed CraftClient replacement with
8 canned satellites, synthetic pass predictions, and time-varying LEO
arcs that drive real AOS/TCA/LOS pass events to the camera overlay
- Fix sky map EL signal fidelity: snap _el to _target_el at sweep start
so 2D scans compute correct per-row RSSI (was using stale elevation)
- Branch on demo_mode in app.py _setup_craft_client() to inject
DemoCraftClient instead of the HTTP CraftClient
- Add test_demo_craft.py: 5 tests exercising search, passes, tracking,
and WAITING state through the full TUI without mocks
- Update take_screenshots.py to cover all 8 screens (dashboard, control,
craft search, craft tracking, signal, system, console, camera)
