Add an error boundary around the key detail page that shows a fallback UI instead of a white screen on unexpected errors

[Chucks1093]

Summary

An unhandled error inside the key detail page currently causes a full white screen with no recovery path. A React error boundary wrapping the page should catch render errors and show a fallback UI with a reload button.

Scope

• Wrap the key detail page route in an ErrorBoundary component
• Render a fallback card with: 'Something went wrong loading this key', the error message in small text, and a 'Reload page' button
• Log the caught error and component stack to the error tracking service
• Allow the user to navigate back to the marketplace from the fallback card
• Reset the error boundary state when the user navigates to a different route

Acceptance Criteria

• Render error caught and fallback UI shown instead of white screen
• Error message visible in fallback card
• 'Reload page' button reloads and resets the boundary
• Error logged to tracking service with component stack
• Navigating away resets the boundary

ETA: 12 hours

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Coordinate on Telegram

[Damilorlar]

@Damilorlar has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would love to work on this project.

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[devgbmuyiwa]

@devgbmuyiwa has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

hello can i work on this issue

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[DavisVT]

@DavisVT has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

pls assign me this issue

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!

@DavisVT's PR #804 was approved and merged by @Chucks1093.

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