Rearchitect UI test suite for complete, non-flaky coverage against live API

- Migrate Suite4-10, SmokeTests, NavigationCriticalPathTests to AuthenticatedTestCase
  with seeded admin account and real backend login
- Add 34 accessibility identifiers across 11 app views (task completion, profile,
  notifications, theme, join residence, manage users, forms)
- Create FeatureCoverageTests (14 tests) covering previously untested features:
  profile edit, theme selection, notification prefs, task completion, manage users,
  join residence, task templates
- Create MultiUserSharingTests (18 API tests) and MultiUserSharingUITests (8 XCUI
  tests) for full cross-user residence sharing lifecycle
- Add cleanup infrastructure: SuiteZZ_CleanupTests auto-wipes test data after runs,
  cleanup_test_data.sh script for manual reset via admin API
- Add share code API methods to TestAccountAPIClient (generateShareCode, joinWithCode,
  getShareCode, listResidenceUsers, removeUser)
- Fix app bugs found by tests:
  - ResidencesListView join callback now uses forceRefresh:true
  - APILayer invalidates task cache when residence count changes
  - AllTasksView auto-reloads tasks when residence list changes
- Fix test quality: keyboard focus waits, Save/Add button label matching,
  Documents tab label (Docs), remove API verification from UI tests
- DataLayerTests and PasswordResetTests now verify through UI, not API calls

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

iosApp/iosApp/Residence/JoinResidenceView.swift

@@ -77,6 +77,7 @@ struct JoinResidenceView: View {
                                         RoundedRectangle(cornerRadius: 16, style: .continuous)
                                             .stroke(isCodeFocused ? Color.appPrimary : Color.appTextSecondary.opacity(0.15), lineWidth: 1.5)
                                     )
+                                    .accessibilityIdentifier("JoinResidence.ShareCodeField")
                                     .onChange(of: shareCode) { _, newValue in
                                         if newValue.count > 6 {
                                             shareCode = String(newValue.prefix(6))
@@ -133,6 +134,7 @@ struct JoinResidenceView: View {
                                     y: 5
                                 )
                             }
+                            .accessibilityIdentifier("JoinResidence.JoinButton")
                             .disabled(shareCode.count != 6 || viewModel.isLoading)
 
                             // Cancel Button

iosApp/iosApp/Residence/ManageUsersView.swift

@@ -68,6 +68,7 @@ struct ManageUsersView: View {
                             .padding(.bottom)
                         }
                     }
+                    .accessibilityIdentifier("ManageUsers.UsersList")
                 }
             }
             .listStyle(.plain)

iosApp/iosApp/Residence/ResidencesListView.swift

@@ -94,7 +94,7 @@ struct ResidencesListView: View {
         }
         .sheet(isPresented: $showingJoinResidence) {
             JoinResidenceView(onJoined: {
-                viewModel.loadMyResidences()
+                viewModel.loadMyResidences(forceRefresh: true)
             })
         }
         .sheet(isPresented: $showingUpgradePrompt) {
@@ -226,6 +226,7 @@ private struct ResidencesContent: View {
             }
             .padding(.bottom, OrganicSpacing.airy)
         }
+        .accessibilityIdentifier(AccessibilityIdentifiers.Residence.residencesList)
         .safeAreaInset(edge: .bottom) {
             Color.clear.frame(height: 0)
         }