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/AddMoodHeaderView.swift

@@ -333,7 +333,7 @@ struct AuraVotingView: View {
 
                 // Label with elegant typography
                 Text(mood.strValue)
-                    .font(.system(size: 12, weight: .semibold, design: .rounded))
+                    .font(.caption.weight(.semibold))
                     .foregroundColor(color)
                     .tracking(0.5)
             }