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/Sharing/SharingListView.swift

@@ -154,10 +154,10 @@ struct SharingListView: View {
                     }, label: {
                         ZStack {
                             theme.currentTheme.secondaryBGColor
-                            
+
                             item.preview
                                 .frame(height: 88)
-                            
+
                             VStack {
                                 Spacer()
                                 Text(item.description)
@@ -179,6 +179,7 @@ struct SharingListView: View {
                         .contentShape(Rectangle())
                         .padding([.leading, .trailing])
                     })
+                    .accessibilityIdentifier(AccessibilityID.Sharing.templateButton(item.description))
                 }
                 
             }