## Summary
- replace chart.js/auto imports with explicit chart registries
- split annotation plugin registration to file-detail charts only
- batch crosshair redraws with requestAnimationFrame and disable chart update animations
- reduce dense-axis tick measurement work on dashboard charts

## Verification
- bun format
- bun lint
- bun typecheck
- bun run --cwd apps/web test tests/lib/chart-utils.test.ts
- bun run build:web

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## Summary by CodeRabbit

## Release Notes

* **New Features**
  * Added timezone-aware date window extraction for data processing pipelines.
  * Extended chart configuration to support animation control options.

* **Bug Fixes**
  * Improved validation of NetFlow data files to reject malformed filenames.

* **Performance**
  * Optimized chart rendering with coalesced crosshair redraws using animation frames.
  * Centralized Chart.js plugin registration to eliminate duplicate initialization.

* **Tests**
  * Enhanced test coverage for exclusive date boundary handling and multi-source data filtering.

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