core/downloader.py: When a file already exists at dest_path, extract the expected
SHA256 from metadata, prefers a trusted LoRA Manager sidecar hash, falls back to
calculating the file hash, and returns already_exists=true plus sha256_source
when the hashes match. If the hashes differ, the download is skipped with a
clear warning instead of silently re-downloading.
web/resolver/actions/resolve_download_methods.js: Thread already_exists through
resolveDownloadMethods so notifications, progress messages, and snapshot payloads
reflect 'Already downloaded' when the backend determined the model was a SHA256
match.
Dariusz L
66bbaedf66