Fix widget layout clipping and add comprehensive widget previews

- Fix LargeVotingView mood icons getting clipped at edges by using
  flexible HStack spacing with maxWidth: .infinity
- Fix VotingView medium layout with smaller icons and even distribution
- Add comprehensive #Preview macros for all widget states:
  - Vote widget: small/medium, voted/not voted, all mood states
  - Timeline widget: small/medium/large with various data states
- Reduce icon sizes and padding to fit within widget bounds
- Update accessibility labels and hints across views

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Shared/Views/CustomizeView/SubViews/IconPickerView.swift

@@ -64,6 +64,8 @@ struct IconPickerView: View {
                                 .frame(width: 50, height:50)
                                 .cornerRadius(10)
                         })
+                        .accessibilityLabel(String(localized: "Default app icon"))
+                        .accessibilityHint(String(localized: "Double tap to select"))
                         
                         
                         ForEach(iconSets, id: \.self.0){ iconSet in
@@ -78,6 +80,8 @@ struct IconPickerView: View {
                                     .frame(width: 50, height:50)
                                     .cornerRadius(10)
                             })
+                            .accessibilityLabel(String(localized: "App icon style \(iconSet.1.replacingOccurrences(of: "AppIcon", with: "").replacingOccurrences(of: "Image", with: ""))"))
+                            .accessibilityHint(String(localized: "Double tap to select"))
                         }
                     }
                     .padding()