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/InsightsView/InsightsView.swift

@@ -277,6 +277,7 @@ struct InsightsSectionView: View {
                 .padding(.vertical, 14)
             }
             .buttonStyle(.plain)
+            .accessibilityIdentifier(AccessibilityID.Insights.expandCollapseButton)
             .accessibilityAddTraits(.isHeader)
 
             // Insights List (collapsible)

Shared/Views/InsightsView/ReportDateRangePicker.swift

@@ -146,6 +146,7 @@ struct ReportDateRangePicker: View {
                     .background(Color.accentColor.opacity(0.15))
                     .clipShape(Circle())
             }
+            .accessibilityIdentifier(AccessibilityID.Reports.previousMonthButton)
             .accessibilityLabel("Previous month")
 
             Spacer()
@@ -172,6 +173,7 @@ struct ReportDateRangePicker: View {
                     .background(Color.accentColor.opacity(0.15))
                     .clipShape(Circle())
             }
+            .accessibilityIdentifier(AccessibilityID.Reports.nextMonthButton)
             .accessibilityLabel("Next month")
             .disabled(isDisplayingCurrentMonth)
         }
@@ -341,6 +343,7 @@ private struct ReportDayCell: View {
         }
         .buttonStyle(.plain)
         .disabled(isFuture)
+        .accessibilityIdentifier(AccessibilityID.Reports.dayCell(dateString: dayNumber))
         .frame(height: 40)
     }
 }

Shared/Views/InsightsView/ReportsView.swift

@@ -95,7 +95,9 @@ struct ReportsView: View {
                     viewModel.exportDataPDF()
                 }
             }
+            .accessibilityIdentifier(AccessibilityID.Reports.privacyShareButton)
             Button(String(localized: "Cancel"), role: .cancel) {}
+                .accessibilityIdentifier(AccessibilityID.Reports.privacyCancelButton)
         } message: {
             Text("This report contains your personal mood data and journal notes. Only share it with people you trust.")
         }