Tighten the hero + feature cards to punchy one-liners and surface current
capabilities: swap the standalone channel-manager card for live YouTube
search (folding tagging into the readable card). Regenerate the three
preview images (feed, channels, playlists) from a rich real account instead
of the sparse demo, so the landing shows what a full instance looks like.
EN/HU/DE.
Real screenshots from the shared demo account (neutral, repo-safe — no personal
data), captured via headless Edge + CDP with the demo session cookie injected.
Fills the feed (hero) and playlists preview slots on the landing page; the channels
slot stays a graceful labelled placeholder (the demo has no subscriptions).
