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/TripCreationView.swift

@@ -420,7 +420,7 @@ struct TripCreationView: View {
         ThemedSection(title: "Select Games") {
             if viewModel.isLoadingGames || viewModel.availableGames.isEmpty {
                 HStack(spacing: Theme.Spacing.sm) {
-                    ThemedSpinnerCompact(size: 20)
+                    LoadingSpinner(size: .small)
                     Text("Loading games...")
                         .font(.body)
                         .foregroundStyle(Theme.textSecondary(colorScheme))
@@ -865,14 +865,7 @@ struct TripCreationView: View {
     }
 
     private var planningOverlay: some View {
-        ZStack {
-            Color.black.opacity(0.5)
-                .ignoresSafeArea()
-
-            PlanningProgressView()
-                .padding(40)
-                .background(.ultraThinMaterial, in: RoundedRectangle(cornerRadius: 24))
-        }
+        LoadingSheet(label: "Planning trip")
     }
 
     private var planButton: some View {
@@ -1219,7 +1212,7 @@ struct LazyTeamSection: View {
                     Spacer()
 
                     if isLoading {
-                        ThemedSpinnerCompact(size: 14)
+                        LoadingSpinner(size: .small)
                     } else if selectedCount > 0 {
                         Text("\(selectedCount)")
                             .font(.caption2)
@@ -1245,7 +1238,7 @@ struct LazyTeamSection: View {
             if isExpanded {
                 if isLoading {
                     HStack {
-                        ThemedSpinnerCompact(size: 16)
+                        LoadingSpinner(size: .small)
                         Text("Loading games...")
                             .font(.caption)
                             .foregroundStyle(Theme.textMuted(colorScheme))
@@ -1407,7 +1400,7 @@ struct LocationSearchSheet: View {
                         .textFieldStyle(.plain)
                         .autocorrectionDisabled()
                     if isSearching {
-                        ThemedSpinnerCompact(size: 16)
+                        LoadingSpinner(size: .small)
                     } else if !searchText.isEmpty {
                         Button {
                             searchText = ""
@@ -2032,7 +2025,7 @@ struct TripOptionCard: View {
                             .transition(.opacity)
                     } else if isLoadingDescription {
                         HStack(spacing: 4) {
-                            ThemedSpinnerCompact(size: 12)
+                            LoadingSpinner(size: .small)
                             Text("Generating...")
                                 .font(.caption2)
                                 .foregroundStyle(Theme.textMuted(colorScheme))