partition(":") split at the first colon, so registry-prefixed images
like "ghcr.io/open-webui/open-webui:v0.8.10" produced name="ghcr"
instead of the correct repository name, causing DSM error 114.
rpartition(":") always splits at the last colon, correctly handling:
- plain images: "nginx:1.24" → name="nginx", tag="1.24"
- namespaced: "nouchka/sqlite3:latest" → correct split
- registry URLs: "ghcr.io/foo/bar:v1" → name="ghcr.io/foo/bar", tag="v1"
- no tag: "nginx" → name="nginx", tag="latest" (fallback)
Added regression test verifying correct params sent to DSM delete API.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- list_images: lists all local Docker images sorted by size desc,
shows size (human-readable), creation date, in-use marker, and
update-available marker; gracefully handles container list failure
- delete_image: accepts name:tag or image hash, blocks deletion when
image is in use by a container, requires confirmed=True to execute;
default shows a dry-run preview
- 16 unit tests covering all paths (mock DSM client)
- ruff format + check clean
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
marcus