[jules] enhance: Add error boundary with retry mechanism for mobile app

[Devasy]

This PR implements a global React Error Boundary to catch render errors gracefully in the mobile app.

Features:

• Fallback UI using react-native-paper components.
• Full theme support natively accessed through the parent PaperProvider.
• "Try Again" button to reset the error state and re-render the app.

Technical implementation details:

• Created mobile/components/ErrorBoundary.js using a hybrid Class+Functional approach to support React hooks (like useTheme) in the fallback UI.
• Integrated into mobile/App.js wrapping the AppNavigator.
• Updated JULES tracking files as required.

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PR created automatically by Jules for task 1451835751904586127 started by @Devasy23

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⚙️ Run configuration

Configuration used: Organization UI

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Run ID: c2913829-d0a2-4b97-9139-66df0ecdd79e

📥 Commits

Reviewing files that changed from the base of the PR and between 9404621 and 23da07e.

📒 Files selected for processing (4)

• .Jules/changelog.md
• .Jules/todo.md
• mobile/App.js
• mobile/components/ErrorBoundary.js

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@9404621). Learn more about missing BASE report.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #319   +/-   ##
=======================================
  Coverage        ?   63.55%           
=======================================
  Files           ?       21           
  Lines           ?     2456           
  Branches        ?      254           
=======================================
  Hits            ?     1561           
  Misses          ?      831           
  Partials        ?       64           

Components	Coverage Δ
Authentication System	71.35% <ø> (?)
Expense Management	70.15% <ø> (?)
Group Management	73.78% <ø> (?)
User Management	97.16% <ø> (?)
Backend Core	70.78% <ø> (?)

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