DDP uses fire-and-forget UDP, so when a WiFi device becomes overwhelmed
by sustained traffic, sends appear successful while the device is
actually unreachable. This adds:
- HTTP liveness probe (GET /json/info, 2s timeout) every 10s during
streaming, exposed as device_streaming_reachable in target state
- Adaptive FPS (opt-in): exponential backoff when device is unreachable,
gradual recovery when it stabilizes — finds sustainable send rate
- Honest health checks: removed the lie that forced device_online=true
during streaming; now runs actual health checks regardless
- Target editor toggle, FPS display shows effective rate when throttled,
health dot reflects streaming reachability, red highlight when
unreachable
- Auto-backup scheduling support in settings modal
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
