Complete accessibility identifier coverage across all 152 project files

Exhaustive file-by-file audit of every Swift file in the project (iOS app,
Watch app, Widget extension). Every interactive UI element — buttons, toggles,
pickers, links, menus, tap gestures, text editors, color pickers, photo
pickers — now has an accessibilityIdentifier for XCUITest automation.

46 files changed across Shared/, Onboarding/, Watch App/, and Widget targets.
Added ~100 new ID definitions covering settings debug controls, export/photo
views, sharing templates, customization subviews, onboarding flows, tip
modals, widget voting buttons, and watch mood buttons.

Shared/Views/CustomizeView/CustomizeView.swift

@@ -538,6 +538,7 @@ struct CelebrationAnimationPickerCompact: View {
                             )
                         }
                         .buttonStyle(.plain)
+                        .accessibilityIdentifier(AccessibilityID.Customize.celebrationAnimationButton(animation.rawValue))
                     }
                 }
                 .padding(.horizontal, 4)
@@ -666,6 +667,7 @@ struct CustomWidgetSection: View {
                         CustomWidgetView(customWidgetModel: widget)
                             .frame(width: 60, height: 60)
                             .cornerRadius(12)
+                            .accessibilityIdentifier(AccessibilityID.Customize.customWidget(UserDefaultsStore.getCustomWidgets().firstIndex(where: { $0.uuid == widget.uuid }) ?? 0))
                             .onTapGesture {
                                 AnalyticsManager.shared.track(.widgetViewed)
                                 selectedWidget.selectedItem = widget.copy() as? CustomWidgetModel
@@ -689,6 +691,7 @@ struct CustomWidgetSection: View {
                                 .foregroundColor(.secondary)
                         }
                     }
+                    .accessibilityIdentifier(AccessibilityID.Customize.customWidgetAdd)
                 }
             }
 
@@ -701,6 +704,7 @@ struct CustomWidgetSection: View {
                 }
                 .foregroundColor(.accentColor)
             }
+            .accessibilityIdentifier(AccessibilityID.Customize.widgetHowToLink)
         }
         .sheet(isPresented: $selectedWidget.showSheet) {
             if let selectedItem = selectedWidget.selectedItem {
@@ -822,6 +826,7 @@ struct SubscriptionBannerView: View {
             .padding(.horizontal, 16)
             .padding(.vertical, 8)
             .background(Capsule().fill(Color.green.opacity(0.15)))
+            .accessibilityIdentifier(AccessibilityID.Customize.manageSubscriptionButton)
         }
         .padding(16)
     }
@@ -866,6 +871,7 @@ struct SubscriptionBannerView: View {
             )
         }
         .buttonStyle(.plain)
+        .accessibilityIdentifier(AccessibilityID.Customize.unlockPremiumButton)
     }
 
     private func openSubscriptionManagement() async {