1. registries.conf includes docker.io search + fallback 23.182.128.160
2. First-boot pull_with_fallback() tries primary then fallback registry
3. FileBrowser created with noauth config on persistent volume
4. Backend dynamic registries.json pre-created in ISO
5. Filebrowser password secret created for token flow
Fixes: apps stuck at 0% download, filebrowser not working, dynamic
catalog not loading on fresh installs.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
f586cbc499