- DiffusionBackend.status() now takes _lock so frontend polling
cannot observe a torn snapshot mid-swap.
- Scrub hf_token / pipe_kwargs / single_file_kwargs from frame
locals before logger.exception() so rich tracebacks and structlog
formatters that render locals do not leak hf_... tokens into logs.
- routes/models.py delete_cached_repo: refuse to delete the cache
underlying a currently-loaded diffusion pipeline (both the GGUF
repo and the matching diffusers base_repo). Symmetric with the
existing chat-load + GGUF guard.
- Frontend seed validation: reject non-integer and out-of-safe-
integer-range inputs instead of silently rounding via Number(),
which would otherwise send a different seed than what the user
typed.
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