⚡ Bolt: Optimize list filtering performance with useMemo

[ayush-kumar-21]

💡 What:
Wrapped the filteredCases derivation logic in useMemo hooks across four list-based React components (CaseQueuePage.tsx, EvidenceVault.tsx, SmartBailPage.tsx, CitizenTimeline.tsx). Additionally, hoisted the expensive .toLowerCase() operations on the search query state outside of the Array.prototype.filter loop.

🎯 Why:
Without memoization, these list components re-calculate the filtered array on every single re-render, even when the underlying data or search queries haven't changed (e.g., when a user clicks to select a case or a loading state toggles). Furthermore, calling .toLowerCase() on the search string inside the .filter loop causes a redundant string operation for every single item in the list, scaling poorly as list sizes grow.

📊 Impact:

• Eliminates O(N) filtering operations when unrelated component state changes.
• Reduces string allocations and operations during filtering from O(2N) to O(1) for the search query.
• Visibly smoother UI interactions when selecting cases in large lists.

🔬 Measurement:

• Run frontend typechecks: npx typescript/tsc --noEmit
• Run frontend linter: npx eslint .
• Run backend tests to ensure no regressions: pytest

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PR created automatically by Jules for task 12045444136701248214 started by @ayush-kumar-21

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