Add casting: Chromecast + DLNA receivers

[savvystartagency]

Summary

Adds a Cast button to Movie / TV / Downloads pages plus a device-picker modal and a mini-controller. Streams anime mp4, anime Sl-Hls, vidsrc / videasy / 2embed HLS captures, and completed local downloads to any Chromecast-built-in device (incl. XGIMI Android TV projectors) or DLNA renderer on the LAN.

Highlights

• src/ipc/cast.js — main-process subsystem. Discovery via bonjour-service (_googlecast._tcp) + dlnacasts3 SSDP. Single active session (mirrors PIP) via castv2-client for Chromecast and dlnacasts3 for DLNA. Clean disconnect on before-quit.
• LAN-routable HTTP server bound 0.0.0.0:<random> (separate from the 127.0.0.1 allmanga player server):
  • /file/:token — range-supported local file serve
  • /proxy/:token — header-injecting proxy with on-the-fly HLS playlist rewriting (segments + EXT-X-KEY / EXT-X-MAP child tokens) so receivers always speak to a Referer-injecting proxy
  • /sub/:token — VTT with CORS, inline SRT→VTT conversion
• Preload — cast:* IPC surface modelled on existing PIP naming.
• Renderer — useCast() hook, CastPickerModal, CastMiniController (play/pause/scrubber/CC/volume/stop), CastIcon + CastingIcon. Wired into MoviePage, TVPage, DownloadsPage.
• Settings — new "Cast & Devices" section: auto-discover, include-DLNA, auto-stop-on-player-stop, preferred device, rescan, limitations notes.
• Storage — five new CAST_* keys.

Dependencies

castv2-client, bonjour-service, dlnacasts3 — all pure JS, no native deps.

Test plan

• Settings → Cast & Devices: Chromecast / XGIMI Android TV appears within ~5s
• Movie page → anime mp4 (AllManga) → Cast → plays on receiver
• Movie page → vidsrc m3u8 → Cast → plays (proxy injects Referer)
• TV page → episode → Cast → episode title + poster show on receiver
• Downloads page → completed mp4 → Cast → plays; range seek works
• Mini-controller play / pause / seek / volume / CC toggle / stop all work
• App quit while casting → receiver returns to idle in ~2s
• Disable DLNA in settings → DLNA devices vanish from picker

Known limitations (surfaced in Settings notes box)

• One-time signed segment URLs may invalidate during long sessions
• DRM (Widevine / PlayReady) won't play on receivers
• Non-AndroidTV DLNA-only renderers usually reject HLS
• Mid-segment seeks on rewritten HLS take 2–3s
• Single active session at a time
• Proxy injects Referer + User-Agent only — sources requiring cookies will not work

[truelockmc]

Looks interesting, I suppose you have a Device to test this?

Because I do not xD...

Also, do you understand the Code you shared here?
Because the Text and the comment's look pretty AI generated 😬

[savvystartagency]

yes, I am using it on my projectors and my TV :) ;)

[savvystartagency]

I am just adding some controls, will push shortly