⚙️ Implement Settings screen

[Smartdevs17]

Problem

Navigation references a Settings screen that is not implemented.

Context

Users cannot configure app preferences like notifications, default currency, or theme.

Proposed Solution

Create Settings screen with sections:

1. Account: Wallet address, network, disconnect option
2. Notifications: Enable/disable billing reminders
3. Preferences: Default currency, category preferences
4. Appearance: Theme selection (if implemented)
5. About: Version, support links, legal

Acceptance Criteria

• All settings sections render
• Wallet disconnect works
• Notification toggle persists
• Currency preference saved
• Version number displayed

Technical Notes

New File: src/screens/SettingsScreen.tsx
Storage: AsyncStorage for preferences
Navigation: Part of Tab navigator

Constraints

• AsyncStorage import already available
• Handle permission requests for notifications
• Consider biometric auth for sensitive settings

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[thefifthdev]

@thefifthdev has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

I can handle this, pr in a bit

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[devdianax]

@devdianax has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

can I work on this

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Congratulations, @devdianax! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

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