v1.1 polish: accessibility, error logging, localization, and code quality sweep

- Wrap 30+ production print() statements in #if DEBUG guards across 18 files
- Add VoiceOver labels, hints, and traits to Watch app, Live Activities, widgets
- Add .accessibilityAddTraits(.isButton) to 15+ onTapGesture views
- Add text alternatives for color-only indicators (progress dots, mood circles)
- Localize raw string literals in NoteEditorView, EntryDetailView, widgets
- Replace 25+ silent try? with do/catch + AppLogger error logging
- Replace hardcoded font sizes with semantic Dynamic Type fonts
- Fix FIXME in IconPickerView (log icon change errors)
- Extract magic animation delays to named constants across 8 files
- Add widget empty state "Log your first mood!" messaging
- Hide decorative images from VoiceOver, add labels to ColorPickers
- Remove stale TODO in Color+Codable (alpha change deferred for migration)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Shared/Views/CustomizeView/SubViews/ImagePackPickerView.swift

@@ -48,6 +48,8 @@ struct ImagePackPickerView: View {
                                 imagePack = images
                                 AnalyticsManager.shared.track(.iconPackChanged(packId: images.rawValue))
                             }
+                            .accessibilityAddTraits(.isButton)
+                            .accessibilityLabel(String(localized: "Select \(String(describing: images)) icon pack"))
                             if images.rawValue != (MoodImages.allCases.sorted(by: { $0.rawValue > $1.rawValue }).first?.rawValue) ?? 0 {
                                 Divider()
                             }