New features:
- Override composite blend mode: per-pixel alpha from brightness
(black=transparent, bright=opaque). Ideal for API input over effects.
- API input test preview FPS chart uses shared createFpsSparkline
(same look as target card charts)
Fixes:
- Fix api_input source not surviving server restart: from_dict was
still passing removed led_count field to constructor
- Fix composite layer brightness/processing selectors not aligned:
labels get fixed width, selects fill remaining space
- Fix CSPT input selector showing in non-CSPT CSS test mode
- Fix test modal LED/FPS controls showing for api_input sources
- Server only sends test WS frames when api_input push_generation changes
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
alexei.dolgolyov
afd4a3bc05