[TheerasakPing]

💡 What: Optimized FileList.jsx to pre-compute Set objects for selectedPaths and cutPaths using useMemo, instead of using Array.some() inside the sortedItems.map loop.
🎯 Why: Resolves an O(NM) rendering complexity bottleneck. Array.some() inside the map over items meant iterating over secondary arrays (selectedItems, clipboard.items) for every item rendered. This scales poorly in directories with a large number of files.
📊 Impact: Reduces rendering complexity from O(NM) to O(N) by replacing O(N) Array lookups with O(1) Set lookups. This should measurably speed up rendering for folders with hundreds or thousands of files.
🔬 Measurement: Verify rendering speed in a directory with 10,000+ files before and after this change, particularly when selecting or cutting multiple items.

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PR created automatically by Jules for task 6148484550784837859 started by @TheerasakPing

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