polish: refine browser outcome and trace presentation

fix: tune sd turbo outcome visibility

feat: add outcome visibility tuning matrix

chore: add hugging face lfs attributes

chore: add hugging face docker deployment

feat: add captured denoising trace apparatus UI

feat: polish Catbox observation flow

docs: add manual GPU validation path

feat: add browser generation failure states

feat: connect browser UI to generated outcomes

feat: wire persistent SD Turbo model runner

feat: add dev controls observation overrides

feat: add fake-backed model backend contract

Initial commit