[WIP] Improve code quality and efficiency

[Claude]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

---

This section details on the original issue you should resolve

<issue_title>Improve code</issue_title>
<issue_description>@claude improve code</issue_description>

<agent_instructions>what's going on, who are you, where is opus</agent_instructions>

Comments on the Issue (you are @claude[agent] in this section)

@Boshen @claude what's going on

[Boshen]

@claude improve improve

[Boshen]

@claude[agent] improve improve

[Claude]

@claude[agent] improve improve

Done! I've completed a second round of code improvements including:

• Optimized StatsCards.tsx with useMemo to avoid repeated calculations on every render
• Refactored NpmStatsCards.tsx to eliminate code duplication (reduced from 52 lines to 39 lines)
• Extracted hardcoded data from MinificationStats.tsx into a constants file
• Added performance optimizations with useMemo hooks

All changes validated with vp check && vp run build - no errors! ✅

Commit: 8588f52