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/MonthView/MonthDetailView.swift

@@ -117,6 +117,7 @@ struct MonthDetailView: View {
                 selectedEntry = nil
                 showUpdateEntryAlert = false
             })
+            .accessibilityIdentifier(AccessibilityID.MonthDetail.cancelButton)
         }   
     }
     
@@ -153,6 +154,7 @@ struct MonthDetailView: View {
             LazyVGrid(columns: columns, spacing: 25) {
                 ForEach(entries, id: \.self) { entry in
                     listViewEntry(forEntry: entry)
+                        .accessibilityIdentifier(AccessibilityID.MonthDetail.entryCell(DateFormattingCache.shared.string(for: entry.forDate, format: .dateMedium)))
                         .onTapGesture(perform: {
                             if entry.canEdit {
                                 selectedEntry = entry

Shared/Views/MonthView/MonthView.swift

@@ -378,6 +378,7 @@ struct MonthView: View {
         .preferredColorScheme(theme.preferredColorScheme)
         #if DEBUG
         // Triple-tap to toggle demo mode for video recording
+        .accessibilityIdentifier(AccessibilityID.MonthView.debugDemoToggle)
         .onTapGesture(count: 3) {
             if demoManager.isDemoMode {
                 demoManager.stopDemoMode()
@@ -591,6 +592,7 @@ struct MonthCard: View, Equatable {
                     }
                 }
                 .buttonStyle(.plain)
+                .accessibilityIdentifier(AccessibilityID.MonthView.statsToggleButton)
                 .accessibilityLabel("\(Random.monthName(fromMonthInt: month)) \(String(year)), \(showStats ? "expanded" : "collapsed")")
                 .accessibilityHint("Double tap to toggle statistics")
 
@@ -661,6 +663,7 @@ struct MonthCard: View, Equatable {
                 .fill(theme.currentTheme.secondaryBGColor)
         )
         .contentShape(Rectangle())
+        .accessibilityIdentifier(AccessibilityID.MonthView.dayCell(dateString: "\(month)_\(year)"))
         .onTapGesture {
             onTap()
         }
@@ -867,6 +870,7 @@ extension MonthView {
                 }
                 .padding(.top, 60)
                 .padding(.trailing)
+                .accessibilityIdentifier(AccessibilityID.MonthView.settingsButton)
                 Spacer()
             }
         }