New full-page training workspace for the Images tab. Left column configures the run:
model family (FLUX.1-dev, Qwen-Image, Z-Image, SDXL in popularity order, with per-family
VRAM/license notes and defaults, backfilled from the backend families list when present),
base repo, dataset (existing folder, browser upload, or one-click example import), an
in-browser caption labeling grid (per-image thumbnail + caption saved on blur, delete,
uncaptioned highlight), adapter name, trigger prompt, and collapsed training settings.
Right column shows the live run: progress + loss/avg/speed/peak-VRAM readouts, the reused
training loss/LR charts fed from metric_history, and a completion card that deploys the
adapter into Create or starts another run.
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