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/SettingsView/LiveActivityPreviewView.swift

@@ -58,6 +58,7 @@ struct LiveActivityPreviewView: View {
                             .background(Color.gray.opacity(0.2))
                             .cornerRadius(12)
                     }
+                    .accessibilityIdentifier(AccessibilityID.Debug.liveActivityResetButton)
 
                     Button(action: toggleAnimation) {
                         Label(isAnimating ? "Pause" : "Start", systemImage: isAnimating ? "pause.fill" : "play.fill")
@@ -68,6 +69,7 @@ struct LiveActivityPreviewView: View {
                             .foregroundColor(.white)
                             .cornerRadius(12)
                     }
+                    .accessibilityIdentifier(AccessibilityID.Debug.liveActivityToggleButton)
                 }
 
                 Button(action: { showRecordingMode = true }) {
@@ -79,6 +81,7 @@ struct LiveActivityPreviewView: View {
                         .foregroundColor(.white)
                         .cornerRadius(12)
                 }
+                .accessibilityIdentifier(AccessibilityID.Debug.liveActivityRecordButton)
             }
             .padding(.horizontal, 20)
             .padding(.bottom, 40)
@@ -264,6 +267,7 @@ struct LiveActivityRecordingView: View {
                     .background(Color.orange)
                     .foregroundColor(.white)
                     .cornerRadius(12)
+                    .accessibilityIdentifier(AccessibilityID.Debug.liveActivityDismissButton)
                 } else if isExporting {
                     Text("Exporting frames...")
                         .font(.title2.bold())
@@ -282,6 +286,7 @@ struct LiveActivityRecordingView: View {
                 }
             }
         }
+        .accessibilityIdentifier(AccessibilityID.Debug.liveActivityExportButton)
         .onTapGesture {
             if !isExporting && !exportComplete {
                 startExport()