The watchlist cards were bare <a href='/video-detail/...'> with no click
interceptor, so clicking one triggered a REAL browser navigation to the
client-routed URL — the server returns the app shell and the entire app
re-boots (every static asset re-fetched = the ~15s 'restart' freeze).
Mirror video-library.js: intercept plain left-clicks on the cards and dispatch
soulsync:video-open-detail {kind, id, source} for in-app SPA navigation instead.
Encodes the open target on each card (library shows by library id, people +
un-owned shows by tmdb id). Modified clicks (new tab) still use the real href;
the eye button's capture-phase handler already stops its own clicks.
d49eb967a4