Download Root Rules: route downloads to a non-default root by ordered
base-model/tag rules per model type (loras/checkpoints/unet/embeddings),
with a rules editor in Settings > Organization, a default-root cue, and
the matched rule shown in the download modal. Translated in all locales.
Conflict note: settings_manager.py adopted the shared
utils.root_paths.normalize_root_identity from main (issue #1146).