fix(schedule): use start of day for date range queries

- Fix startDate to use Calendar.startOfDay instead of Date() to include
  games earlier in the current day
- Add SyncLogger for file-based sync logging viewable in Settings
- Add "View Sync Logs" button in Settings debug section
- Add diagnostics and NBA game logging to ScheduleViewModel
- Add dropped game logging to DataProvider.filterRichGames
- Use SyncLogger in SportsTimeApp and CloudKitService for sync operations

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

SportsTime/Features/Settings/Views/SettingsView.swift

@@ -14,6 +14,7 @@ struct SettingsView: View {
     @State private var showOnboardingPaywall = false
     #if DEBUG
     @State private var selectedSyncStatus: EntitySyncStatus?
+    @State private var showSyncLogs = false
     #endif
 
     var body: some View {
@@ -433,6 +434,13 @@ struct SettingsView: View {
             } label: {
                 Label("Trigger Sync Now", systemImage: "arrow.triangle.2.circlepath")
             }
+
+            // View sync logs
+            Button {
+                showSyncLogs = true
+            } label: {
+                Label("View Sync Logs", systemImage: "doc.text.magnifyingglass")
+            }
         } header: {
             Text("Sync Status")
         } footer: {
@@ -442,6 +450,9 @@ struct SettingsView: View {
         .sheet(item: $selectedSyncStatus) { status in
             SyncStatusDetailSheet(status: status)
         }
+        .sheet(isPresented: $showSyncLogs) {
+            SyncLogViewerSheet()
+        }
     }
     #endif
 
@@ -666,4 +677,67 @@ private struct DetailRow: View {
     }
 }
 
+/// Sheet to view sync logs
+struct SyncLogViewerSheet: View {
+    @Environment(\.dismiss) private var dismiss
+    @State private var logContent = ""
+    @State private var autoScroll = true
+
+    var body: some View {
+        NavigationStack {
+            ScrollViewReader { proxy in
+                ScrollView {
+                    Text(logContent)
+                        .font(.system(.caption, design: .monospaced))
+                        .frame(maxWidth: .infinity, alignment: .leading)
+                        .padding()
+                        .id("logBottom")
+                }
+                .onChange(of: logContent) {
+                    if autoScroll {
+                        withAnimation {
+                            proxy.scrollTo("logBottom", anchor: .bottom)
+                        }
+                    }
+                }
+            }
+            .navigationTitle("Sync Logs")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .topBarLeading) {
+                    Button("Clear") {
+                        SyncLogger.shared.clearLog()
+                        logContent = "Log cleared."
+                    }
+                }
+                ToolbarItem(placement: .topBarTrailing) {
+                    Button("Done") {
+                        dismiss()
+                    }
+                }
+                ToolbarItem(placement: .bottomBar) {
+                    HStack {
+                        Button {
+                            logContent = SyncLogger.shared.readLog()
+                        } label: {
+                            Label("Refresh", systemImage: "arrow.clockwise")
+                        }
+
+                        Spacer()
+
+                        Toggle("Auto-scroll", isOn: $autoScroll)
+                            .toggleStyle(.switch)
+                            .labelsHidden()
+                        Text("Auto-scroll")
+                            .font(.caption)
+                    }
+                }
+            }
+            .onAppear {
+                logContent = SyncLogger.shared.readLog()
+            }
+        }
+    }
+}
+
 #endif