feat(ui): replace loading indicators with Apple-style LoadingSpinner

- Add LoadingSpinner component with small/medium/large sizes using system gray color
- Add LoadingPlaceholder for skeleton loading states
- Add LoadingSheet for full-screen blocking overlays
- Replace ThemedSpinner/ThemedSpinnerCompact across all views
- Remove deprecated loading components from AnimatedComponents.swift
- Delete LoadingTextGenerator.swift
- Fix PhotoImportView layout to fill full width

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

SportsTime/Features/Trip/Views/Wizard/Steps/ReviewStep.swift

@@ -45,11 +45,10 @@ struct ReviewStep: View {
             .clipShape(RoundedRectangle(cornerRadius: Theme.CornerRadius.medium))
 
             Button(action: onPlan) {
-                HStack {
+                HStack(spacing: Theme.Spacing.sm) {
                     if isPlanning {
-                        ProgressView()
-                            .scaleEffect(0.8)
-                            .tint(.white)
+                        LoadingSpinner(size: .small)
+                            .colorScheme(.dark)  // Force white on orange button
                     }
                     Text(isPlanning ? "Planning..." : "Plan My Trip")
                         .fontWeight(.semibold)

SportsTime/Features/Trip/Views/Wizard/Steps/SportsStep.swift

@@ -28,14 +28,8 @@ struct SportsStep: View {
             )
 
             if isLoading {
-                HStack {
-                    ProgressView()
-                        .scaleEffect(0.8)
-                    Text("Checking game availability...")
-                        .font(.caption)
-                        .foregroundStyle(Theme.textMuted(colorScheme))
-                }
-                .padding(.vertical, Theme.Spacing.sm)
+                LoadingSpinner(size: .small, label: "Checking availability...")
+                    .padding(.vertical, Theme.Spacing.sm)
             }
 
             LazyVGrid(columns: columns, spacing: Theme.Spacing.sm) {