Beforeunload-Warnung + Vollbild-Button fuer Viewer

- beforeunload Event verhindert versehentliches Verlassen/Reload
  waehrend Broadcasting oder Viewing aktiv ist
- Vollbild-Button im Viewer-Header (Fullscreen API)
- Fullscreen-State wird korrekt getrackt und Icon wechselt

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Daniel 2026-03-07 01:37:21 +01:00
parent 2ee36789b2
commit 3ef25fc10a
5 changed files with 109 additions and 51 deletions

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