fix(audio-only-mode): prefer non-MCDN/P2P URLs to avoid 403 and DOMException on playback

[Copilot]

• Explore codebase and understand audio-only-mode component
• Fix backupUrl/backup_url handling (correctly typed as string[] arrays)
• Collect all available audio URLs (primary + all backup URLs)
• Prefer non-MCDN/P2P CDN URLs by filtering (avoiding URLs that trigger 403 from other scripts)
• Add warning log when all URLs are MCDN/P2P (fallback case)
• Handle DOMException from detached video elements gracefully (check video.isConnected)
• Fix isMcdnOrP2pUrl catch path to return true (treat unparseable URLs as bad/unknown)
• Fix Prettier formatting error (line 130 too long)
• ESLint check passes

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[Copilot]

Pull request overview

Fixes audio-only mode playback failures caused by selecting MCDN/P2P CDN URLs (which may be rewritten/intercepted by other scripts, leading to 403 and playback DOMExceptions) by improving URL selection and adding a guard for torn-down players.

Changes:

• Corrects the typing/handling of backupUrl / backup_url as string[] and aggregates primary + backup URLs.
• Prefers the first non‑MCDN/P2P URL using URL heuristics, with a warning fallback when only MCDN/P2P URLs are available.
• Adds a video.isConnected guard before assigning video.src to avoid errors when the element is detached during async work.

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[GrassBlock1]

@copilot fix ESLint errors

[Copilot]

@copilot fix ESLint errors

Fixed in ab85ea5 — there was one Prettier error on line 130 (line too long), now properly wrapped.