dtoro af96922e89 feat(preview): inline video player via vidstack + hover-warm prefetch ...

Replace PreviewOverlay's bare <video controls> with a vidstack-driven
player wrapping the same source URL. Vidstack's default video layout
provides a polished chrome (gradient bottom bar, large play overlay,
hover-revealed scrubber) and registers <media-player>/<media-provider>
custom elements that vendor the browser quirks.

To keep first-frame latency low, PhotoTile starts a hover-warm fetch
of the playback URL after a short (120 ms) delay — a single Range
request of the first 512 KB pages the backend's pre-transcoded MP4
cache file into the OS page cache and lands in the browser's HTTP
cache, so when the player mounts and issues its own bytes=0- request
the response is satisfied from disk. Each hash is warmed at most once
per session; AbortController cancels hovers that don't commit.

The vidstack modules are dynamically imported on mount so they never
run during SvelteKit's static prerender — they side-effect
customElements.define() calls which would crash under SSR.

2026-05-18 08:13:59 +02:00

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