⚡ Bolt: [performance improvement]

[ayush-kumar-21]

💡 What: Wrapped filteredCases derivation in useMemo and hoisted search.toLowerCase() outside the .filter loop in CaseQueuePage.tsx.

🎯 Why: Previously, filtering logic ran on every render cycle, causing O(n) iterations and redundant string lowercasing even when unrelated state changed.

📊 Impact: Eliminates unnecessary array mapping/filtering operations during unrelated renders, improving list render performance, reducing CPU spikes, and making typing in the search bar feel snappier.

🔬 Measurement: Verify via React Profiler. Render durations will be significantly lower on state updates not involving search or filter.

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PR created automatically by Jules for task 1730665033712396556 started by @ayush-kumar-21

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