Update Neon colors and show color circles in theme picker

- Update NeonMoodTint to use synthwave colors matching Neon voting style
  (cyan, lime, yellow, orange, magenta)
- Replace text label with 5 color circles in theme preview Colors row
- Remove unused textColor customization code and picker views
- Add .id(moodTint) to Month/Year views for color refresh
- Clean up various unused color-related code

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

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

Shared/Views/CustomizeView/SubViews/AppThemePickerView.swift

@@ -288,12 +288,10 @@ struct AppThemePreviewSheet: View {
                 .padding(.horizontal, 20)
 
             VStack(spacing: 12) {
-                ThemeComponentRow(
+                ThemeColorRow(
                     icon: "paintpalette.fill",
                     title: "Colors",
-                    value: theme.colorTint == .Default ? "Default" :
-                           theme.colorTint == .Neon ? "Neon" :
-                           theme.colorTint == .Pastel ? "Pastel" : "Custom",
+                    moodTint: theme.colorTint,
                     color: .orange
                 )
 
@@ -404,6 +402,48 @@ struct ThemeComponentRow: View {
     }
 }
 
+// MARK: - Color Row with Circles
+
+struct ThemeColorRow: View {
+    let icon: String
+    let title: String
+    let moodTint: MoodTints
+    let color: Color
+
+    @Environment(\.colorScheme) private var colorScheme
+
+    private let moods: [Mood] = [.great, .good, .average, .bad, .horrible]
+
+    var body: some View {
+        HStack(spacing: 14) {
+            Image(systemName: icon)
+                .font(.title3)
+                .foregroundColor(color)
+                .frame(width: 36, height: 36)
+                .background(color.opacity(0.15))
+                .clipShape(RoundedRectangle(cornerRadius: 8))
+
+            Text(title)
+                .font(.subheadline)
+                .foregroundColor(.secondary)
+
+            Spacer()
+
+            HStack(spacing: 6) {
+                ForEach(moods, id: \.rawValue) { mood in
+                    Circle()
+                        .fill(moodTint.color(forMood: mood))
+                        .frame(width: 20, height: 20)
+                }
+            }
+        }
+        .padding(.horizontal, 16)
+        .padding(.vertical, 12)
+        .background(colorScheme == .dark ? Color(.systemGray6) : .white)
+        .clipShape(RoundedRectangle(cornerRadius: 12))
+    }
+}
+
 // MARK: - Preview
 
 struct AppThemePickerView_Previews: PreviewProvider {