v2.1.5 release - Address flickering fix, legacy wallet modal, network state improvements

[boldbitcoin]

Summary

This PR covers critical bug fixes and improvements for v2.1.5 release, including address flickering fix, legacy wallet migration modal, and network state management improvements.

Changes

Added

• Legacy Wallet Migration Modal: New modal appears for users with legacy wallets, advising migration to new wallet setup for better PSBT compatibility
  • Non-dismissible modal with friendly messaging
  • "Do not remind me again" checkbox option
  • Modal flag automatically resets on new wallet import (if wallet is legacy)
  • Standalone LegacyWalletModal component for reusability

Changed

• Network Reset on Wallet Import: Network always resets to mainnet when importing a keyshare to ensure clean state
• Balance Display Styling: Balance rows (BTC and USD) now have transparent background while maintaining tap-to-hide functionality
• Button Alignment: Send and Receive buttons now vertically align with Device and Address Type buttons above for consistent spacing
• QR Scanner Subtitle: Updated subtitle text to "Point camera to Sending Device QR" for clarity

Fixed

• Address Flickering Issue: Fixed address changing/flickering after lock/unlock by making UserContext the single source of truth for addresses
  • UserContext now properly derives network-specific btcPub for both mainnet and testnet
  • WalletHome prioritizes userActiveAddress from UserContext over local state
  • Eliminated race conditions in address derivation
• Network State Management: Improved network state consistency across the app
  • Network reset on import ensures proper address derivation
  • All contexts and providers properly synchronized with network changes
• Cache Clearing: Comprehensive cache clearing on wallet setup and import screens
  • LocalCache cleared on ShowcaseScreen (import)
  • LocalCache cleared on MobilesPairing and MobileNostrPairing (setup mode only)
  • Stale btcPub removed from EncryptedStorage
  • WalletService cache cleared for fresh state

Technical Details

• UserContext: Enhanced refresh() to derive separate btcPub values for mainnet and testnet
• WalletHome: Updated to use UserContext as primary address source, with local state as fallback
• ShowcaseScreen: Added network reset to mainnet on keyshare import using setActiveNetwork()
• Cache Management: Added useEffect hooks to clear all cache on wallet setup/import screens
• Styles: Updated balanceRowWithMargin to use transparent background
• Button Layout: Applied flexOneMinWidthZero and partyGap styles to action buttons for consistent alignment

Files Changed

• components/LegacyWalletModal.tsx (new)
• components/Styles.tsx
• context/UserContext.tsx
• screens/MobileNostrPairing.tsx
• screens/MobilesPairing.tsx
• screens/ShowcaseScreen.tsx
• screens/WalletHome.tsx
• CHANGELOG.md

[HalFinneyIsMyHomeBoy]

Tested manually, passed
Approved