Extract licensing/update feed settings to its own page at
/settings/licensing with dedicated template and handler.
Navbar additions:
- Advanced Settings link (points to existing options page)
- Licensing link with key icon (when licensing enabled)
New handler: LicensingSettings/LicensingSettingsPost serves the
standalone licensing form with all fields (platform, gating,
metadata, extensions).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Jonathan Miller