Add app-wide error boundary and crash fallback

[Lakes41]

Difficulty: Advanced

Type: Bug

Summary

Add an app-wide error boundary so unexpected rendering errors show a safe recovery screen instead of leaving users stuck or crashing without context.

Current Behaviour

Screens use query loading and error states, but there is no visible global React error boundary for unexpected component errors.

Expected Behaviour

Unexpected UI failures should render a safe fallback with options to retry, reset local state, or return to onboarding.

Suggested Implementation

Add an Expo Router-compatible error boundary or root-level React error boundary. Log non-sensitive error details in development and optionally expose a reporting hook for production integrations.

Files or Areas Likely Affected

• app/_layout.tsx
• app/+not-found.tsx
• src/components/
• src/lib/errorReporting/
• tests/
• README.md

Acceptance Criteria

• Unexpected render errors show a fallback screen
• Users can retry or return to a safe route
• Reset action clears local app state where appropriate
• Sensitive values such as wallet data are not logged unnecessarily
• Tests cover the fallback rendering path
• Documentation explains development and production error behaviour

Additional Notes

Avoid adding a third-party error reporting service unless maintainers approve it. Provide a local abstraction first.

[YfengJ]

I would like to apply for this issue.

If assigned, my plan is to add a root-level Expo Router compatible error boundary with a safe fallback screen, retry/reset actions, and non-sensitive development logging behind a small local abstraction. I would avoid adding third-party reporting unless maintainers request it, and add focused coverage for fallback rendering and recovery behavior.

I will wait for assignment or explicit maintainer confirmation before opening a PR.

[GBOYEE]

Hey! I can take this. I will add an app-wide error boundary and crash fallback so unhandled errors show a friendly recovery UI instead of a blank screen. PR incoming shortly.

[gloskull]

Hi, I’d love to work on this issue. I have 4 years of experience across backend, frontend, full-stack, and smart contract development. I understand the task clearly and can deliver a clean, efficient, well-tested solution on time, with strong focus on code quality and maintainability. My PR will be submitted in under 10 hours.