[PM-34126] feat: Add card scan screen

[SaintPatrck]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-34126

📔 Objective

Add the card scan screen with camera integration for credit card scanning:

• CardScanManager: Shared result channel between scanner and consumer, located in ui module (cardscanner/manager/)
• CardScanResult: Sealed class wrapping CardScanData for success/error states
• CardScanViewModel: State management with duplicate-scan guarding and DeferredBackgroundEvent
• CardScanScreen: Composable with camera preview, overlay, and close button
• CardScanNavigation: Type-safe route and navigation helper
• CardScanner feature flag: Gated behind card-scanner-mobile FlagKey
• BitwardenComposeTest: Added cardTextAnalyzer parameter to setContent

Includes ViewModel, Screen, and Manager tests.

[github-actions]

Overall Assessment: APPROVE

This PR adds the card scan screen with camera integration for credit card scanning across 14 files. The implementation closely mirrors the established QR code scanner pattern, introducing a CardScanManager for result communication, a CardScanViewModel with duplicate-scan guarding via DeferredBackgroundEvent, and a CardScanScreen composable with dark-mode overlay. The feature is properly gated behind the card-scanner-mobile feature flag, and no sensitive card data is persisted to disk.

Code Review Details

No findings requiring action were identified. The code follows established codebase patterns, handles sensitive data appropriately in memory, and includes comprehensive test coverage for the ViewModel, Screen, and Manager layers.

[codecov]

Codecov Report

❌ Patch coverage is 84.84848% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.65%. Comparing base (d776756) to head (be951b7).

Files with missing lines	Patch %	Lines
...den/ui/vault/feature/cardscanner/CardScanScreen.kt	88.33%	6 Missing and 1 partial ⚠️
...ui/vault/feature/cardscanner/CardScanNavigation.kt	0.00%	6 Missing ⚠️
.../ui/vault/feature/cardscanner/CardScanViewModel.kt	92.30%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@                          Coverage Diff                           @@
##           card-scanner/2-text-analysis-pipeline    #6721   +/-   ##
======================================================================
  Coverage                                  85.65%   85.65%           
======================================================================
  Files                                        950      955    +5     
  Lines                                      60493    60592   +99     
  Branches                                    8592     8597    +5     
======================================================================
+ Hits                                       51813    51898   +85     
- Misses                                      5673     5685   +12     
- Partials                                    3007     3009    +2     

Flag	Coverage Δ
app-data	17.86% <0.00%> (-0.03%)	⬇️
app-ui-auth-tools	20.85% <0.00%> (-0.02%)	⬇️
app-ui-platform	15.58% <0.00%> (-0.03%)	⬇️
app-ui-vault	26.93% <80.80%> (+0.10%)	⬆️
authenticator	6.51% <0.00%> (-0.02%)	⬇️
lib-core-network-bridge	4.23% <0.00%> (-0.01%)	⬇️
lib-data-ui	1.04% <7.07%> (+<0.01%)	⬆️

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[github-actions]

Checkmarx One – Scan Summary & Details – 013433e3-fa79-4f97-a54c-a30963be03a6

Great job! No new security vulnerabilities introduced in this pull request