- Serve real files at the SPA root (e.g. /welcome/*.png, favicon) from the built app — the
landing screenshots were only ever shown by the Vite dev server, never in production.
- Add the Channel-manager screenshot; the two secondary previews are smaller thumbnails that
open in a custom full-size lightbox (fit-to-viewport, Esc/backdrop/✕ to close).
- Drop a suspended/deleted user to the login page on the next 401 (and poll the session only
while signed in, so the public login page no longer flickers); 'suspended' and 'account
deleted' confirmation banners; strip redirect query params for a clean address bar.
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