Add resilient global error boundaries and route-level diagnostics

[grantfox-oss]

Ensure the app degrades gracefully when route-level errors, async fetch failures, or unexpected client crashes occur, while preserving a usable recovery path.

• Affected files: app/frontend/src/components/ErrorBoundary.tsx, app/frontend/src/components/ErrorReportingShell.tsx, app/frontend/src/app/layout.tsx, app/frontend/src/app/page.tsx, app/frontend/src/lib/errorReporter.ts, app/frontend/src/hooks/analyticsApi.ts, app/frontend/src/app/marketplace/page.tsx, app/frontend/src/app/settings/page.tsx, app/frontend/src/components/NotificationCenterProvider.tsx
• Acceptance criteria:
  • Uncaught route or component errors are captured and shown with a clear fallback state instead of leaving the app blank.
  • Error payloads include route context, code origin, and enough metadata for triage without exposing secrets.
  • Recovery mechanisms are tested for a representative set of client-side failures.

[GABRIELOFGOD]

Please assign this to me, I will resolve it

[felladaniel36-hash]

I'd like to claim this issue. I have reviewed the details and can begin working on a fix right away. Please assign it to me if it's still available. Thanks!

[grantfox-oss]

🦊 GrantFox — @felladaniel36-hash has been assigned to this issue as part of the Third Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #531)
2. Your PR will be reviewed by the BlockDash-Studios maintainers

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