[Demo] Add admin demo-mode toggle + generic website ingest source
- AppSetting: DemoMode, WebsitesEnabled, WebsiteUrls
- Facility.IsDemo flag; SeedData split into SeedReferenceAsync (always)
+ SeedDemoAsync/ClearDemoAsync (idempotent, toggleable at runtime)
- WebsiteListingSource: scrape any admin-configured URL (og:title + content)
- Admin Settings: seed/clear demo card, demo-mode checkbox, website source
fields; Program.cs seeds demo when DemoMode on (or in Development)
- EF migration DemoModeAndWebsites
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
soroush.asadi
0c0449c2b9