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/PhotoPickerView.swift

@@ -76,6 +76,7 @@ struct PhotoPickerView: View {
                         )
                     }
                     .disabled(isProcessing)
+                    .accessibilityIdentifier(AccessibilityID.PhotoPicker.photosPicker)
 
                     // Camera
                     Button {
@@ -111,6 +112,7 @@ struct PhotoPickerView: View {
                         )
                     }
                     .disabled(isProcessing)
+                    .accessibilityIdentifier(AccessibilityID.PhotoPicker.cameraButton)
                 }
                 .padding(.horizontal)
 
@@ -130,6 +132,7 @@ struct PhotoPickerView: View {
                     Button("Cancel") {
                         dismiss()
                     }
+                    .accessibilityIdentifier(AccessibilityID.PhotoPicker.cancelButton)
                 }
             }
             .onChange(of: selectedItem) { _, newItem in
@@ -278,6 +281,7 @@ struct PhotoGalleryView: View {
                                     }
                                 }
                             }
+                            .accessibilityIdentifier(AccessibilityID.PhotoPicker.photoImage)
                     } else {
                         VStack(spacing: 16) {
                             Image(systemName: "photo.badge.exclamationmark")
@@ -301,6 +305,7 @@ struct PhotoGalleryView: View {
                             .font(.title2)
                             .foregroundStyle(.white.opacity(0.7))
                     }
+                    .accessibilityIdentifier(AccessibilityID.PhotoPicker.closeButton)
                 }
 
                 ToolbarItem(placement: .primaryAction) {
@@ -310,17 +315,20 @@ struct PhotoGalleryView: View {
                         } label: {
                             Label("Share", systemImage: "square.and.arrow.up")
                         }
+                        .accessibilityIdentifier(AccessibilityID.PhotoPicker.shareButton)
 
                         Button(role: .destructive) {
                             showDeleteConfirmation = true
                         } label: {
                             Label("Delete", systemImage: "trash")
                         }
+                        .accessibilityIdentifier(AccessibilityID.PhotoPicker.deleteButton)
                     } label: {
                         Image(systemName: "ellipsis.circle.fill")
                             .font(.title2)
                             .foregroundStyle(.white.opacity(0.7))
                     }
+                    .accessibilityIdentifier(AccessibilityID.PhotoPicker.menuButton)
                 }
             }
             .confirmationDialog("Delete Photo", isPresented: $showDeleteConfirmation, titleVisibility: .visible) {
@@ -328,7 +336,9 @@ struct PhotoGalleryView: View {
                     onDelete()
                     dismiss()
                 }
+                .accessibilityIdentifier(AccessibilityID.PhotoPicker.deleteConfirmButton)
                 Button("Cancel", role: .cancel) { }
+                    .accessibilityIdentifier(AccessibilityID.PhotoPicker.deleteCancelButton)
             } message: {
                 Text("Are you sure you want to delete this photo?")
             }