[Labreo]

💡 What:
Combined sequential querySelector fallback calls (.song-title, .title, yt-formatted-string) into a single combined querySelector call (.song-title, .title, yt-formatted-string) in content.js (getQueueItemTitle and extractSong).

🎯 Why:
When evaluating queue items, getQueueItemTitle performed up to 3 separate querySelector calls sequentially. If an item did not match .song-title, the DOM engine had to re-traverse the item's subtree for .title, and again for yt-formatted-string. Combining these into a single group selector allows the browser's native DOM selector engine to find matching elements in a single DOM traversal pass.

📊 Measured Improvement:
Using the Node.js performance test benchmark (test/content.test.js) across 1,000 queue items over 1,000 iterations:

• Baseline (Sequential queries): 59.28 ms
• Optimized (Combined query): 40.86 ms
• Measured Speedup: ~31% reduction in execution time for title extraction.

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PR created automatically by Jules for task 3355317900186913131 started by @Labreo

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