- Add QrCodeDialogWidget with album branding and share functionality
- Integrate QR code option in manage links and share collection pages
- Feature gated behind flagService.internalUser for testing
- QR codes include album name, scannable link, and ente branding
- Auto-close dialog after share operation for better UX
- Add qr_flutter dependency for QR code generation
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
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