⚡ Bolt: [Refactor redundant .filter().length into single-pass frequency maps]

[keerthivinod]

💡 What:
Replaced repeated .filter().length array traversals inside render .map() loops and array declarations with a single O(N) frequency map generated by .reduce() inside useMemo() hooks across ProjectsModule, MaintenanceModule, DashboardModule, ReportsModule, and page.jsx.

🎯 Why:
Calling .filter(...).length repeatedly inside .map() loops or statically declaring multiple distinct .filter().length constants on the same array triggers redundant array traversals on every render update, causing O(N*M) time complexity. This is a subtle anti-pattern that rapidly degrades render speed as array lengths increase.

📊 Impact:
Changes time complexity for category counting inside map loops from O(N*M) (where N is the array size and M is the category count) down to O(N). Render times scale predictably with larger datasets, bypassing unnecessary deep loops in the UI thread.

🔬 Measurement:

1. Run application and observe responsive tab changes and category counting under heavy dataset simulation.
2. Verified JSX integrity, linter passing, and unit tests succeeding via npm run test and npm run lint.
3. Verified zero logic alterations by matching pre/post render counters visually.

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PR created automatically by Jules for task 10826822158505129573 started by @keerthivinod

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