feat(images): frontend Images page, catalog hooks, download dialog
Phase 1 UI for VM image mirror feature:
- use-image-catalog hook (catalog, lxc repo templates, target storages, download)
- ImagesPage: server/node context, arch/search filters, cloud + LXC sections
- DownloadImageDialog: storage picker, background download via DeployTask
- CatalogImage/ImageMirror types, image_download/image_template task kinds
- sidebar nav 'Images' + /images route
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Dilshod Rasulov
32e06fe922