fix: remove user stats from challenge list page

[pbrissaud]

Summary

• Removes UserStats component and its ErrorBoundary/Suspense wrapper from the /challenges page
• Deletes unused components/user-stats.tsx file
• Stats are already shown on the dashboard — no information is lost

Test plan

• Visit /challenges — page renders without the 3 stat cards
• Visit /dashboard — stats still display correctly
• No TypeScript errors (pnpm typecheck)

Closes #241

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
website	Ready	Preview, Comment	Mar 9, 2026 3:57pm

[claude]

Claude finished @pbrissaud's task in 1m 8s —— View job

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PR Review

• Gather context
• Review changed files
• Check for lingering references
• Post review feedback

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This is a clean, focused cleanup PR. Here's what I found:

Changes are correct and complete:

• components/user-stats.tsx is fully deleted — no orphaned file left behind
• All imports and JSX usage of UserStats (including its ErrorBoundary/Suspense wrappers) are removed from app/(main)/challenges/page.tsx
• No lingering references to UserStats or user-stats remain in the main app (the only hits are in the unrelated admin area: app/(admin)/admin/users/)

No issues found:

• No TypeScript errors introduced (pure deletion of a used component)
• No dead imports left in challenges/page.tsx
• The page structure after the removal is clean and logical

Minor observation (non-blocking):
The ChallengesPageContent function still directly queries the DB (getChallenges()) to show the challenge count. This is fine and was pre-existing — just noting it for awareness since it's the only server-side data fetch remaining in that component.

Overall: LGTM. The PR does exactly what it says, nothing more.