⚡ Bolt: Optimize ProgressPanel rendering with React.memo

[primoscope]

Extracted DownloadItem component and used React.memo to prevent unnecessary re-renders in ProgressPanel when WebSocket updates occur. This improves performance when multiple downloads are active.

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PR created automatically by Jules for task 6024972685768185635 started by @dzp5103

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[gemini-code-assist]

Summary of Changes

Hello @primoscope, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on optimizing the rendering performance of the ProgressPanel component. By isolating individual download items into a memoized component and centralizing utility functions, the application can efficiently handle frequent updates from WebSocket connections without redundant re-renders, leading to a smoother user experience.

Highlights

• Performance Optimization: Implemented React.memo on individual download items within the ProgressPanel to prevent unnecessary re-renders, significantly improving performance, especially when multiple downloads are active and WebSocket updates are frequent.
• Component Extraction: Extracted the rendering logic for each download item into a new, dedicated DownloadItem component, enhancing modularity and reusability.
• Utility Function Centralization: Moved formatting utility functions (formatSpeed, formatETA, getStatusColor) from ProgressPanel into a new utils/format.ts file, promoting better code organization.

Changelog

• .jules/bolt.md
  • Documented a learning about React list performance and the action taken to address it.
• frontend/src/components/DownloadItem.tsx
  • Created a new React component DownloadItem to display individual download progress.
  • Wrapped the DownloadItemComponent with React.memo for performance optimization.
• frontend/src/components/ProgressPanel.tsx
  • Imported the new DownloadItem component.
  • Removed the inline rendering logic for individual download items, replacing it with the DownloadItem component.
  • Removed formatSpeed, formatETA, and getStatusColor utility functions, as they were moved to a dedicated utility file.
• frontend/src/utils/format.ts
  • Created a new utility file to house formatSpeed, formatETA, and getStatusColor functions.

Activity

• PR created automatically by Jules for task 6024972685768185635, started by @dzp5103.

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[gemini-code-assist]

Code Review

The pull request successfully optimizes the ProgressPanel component by extracting the DownloadItem into a separate component and wrapping it with React.memo. This is a significant performance improvement for high-frequency updates (like WebSocket progress streams) because it ensures that only the specific item being updated re-renders, rather than the entire list. The refactoring also improves maintainability by moving formatting logic into a utility file. The implementation is clean and follows React best practices.