Add onboarding UI tests and improve app data management

- Add Suite0_OnboardingTests with fresh install and login test flows
- Add accessibility identifiers to onboarding views for UI testing
- Remove deprecated DataCache in favor of unified DataManager
- Update API layer to support public upgrade-triggers endpoint
- Improve onboarding first task view with better date handling
- Update various views with accessibility identifiers for testing
- Fix subscription feature comparison view layout
- Update document detail view improvements

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

iosApp/iosApp/Onboarding/OnboardingCoordinator.swift

@@ -92,9 +92,14 @@ struct OnboardingCoordinator: View {
             isPrimary: KotlinBoolean(bool: true)
         )
 
-        residenceViewModel.createResidence(request: request) { success in
-            print("🏠 ONBOARDING: Residence creation result: \(success ? "SUCCESS" : "FAILED")")
+        residenceViewModel.createResidence(request: request) { (residence: ResidenceResponse?) in
             self.isCreatingResidence = false
+            if let residence = residence {
+                print("🏠 ONBOARDING: Residence created successfully with ID: \(residence.id)")
+                self.onboardingState.createdResidenceId = residence.id
+            } else {
+                print("🏠 ONBOARDING: Residence creation FAILED")
+            }
             // Navigate regardless of success - user can create residence later if needed
             self.goForward(to: step)
         }