diff --git a/cc_stats_app/swift/L10n.swift b/cc_stats_app/swift/L10n.swift
index f8ed41d..5ebd3ab 100644
--- a/cc_stats_app/swift/L10n.swift
+++ b/cc_stats_app/swift/L10n.swift
@@ -59,6 +59,7 @@ enum L10n {
     static var refresh: String { isChinese ? "刷新" : "Refresh" }
 
     // MARK: - Empty/Loading
+    static var loading: String { isChinese ? "加载中" : "Loading" }
     static var noData: String { isChinese ? "暂无会话数据" : "No session data" }
     static var noDataHint: String { isChinese ? "启动 Claude Code 会话即可查看统计数据。" : "Start a Claude Code session to see statistics." }
 
diff --git a/cc_stats_app/swift/StatsViewModel.swift b/cc_stats_app/swift/StatsViewModel.swift
index ccfbbb2..8360e47 100644
--- a/cc_stats_app/swift/StatsViewModel.swift
+++ b/cc_stats_app/swift/StatsViewModel.swift
@@ -104,6 +104,7 @@ final class StatsViewModel: ObservableObject {
 
     func selectSource(_ source: DataSource) {
         selectedSource = source
+        activeTab = (source == .cursor) ? .cursor : .claudeCode
         refresh()
     }
 
diff --git a/cc_stats_app/swift/Views/DashboardView.swift b/cc_stats_app/swift/Views/DashboardView.swift
index 92b095c..80db853 100644
--- a/cc_stats_app/swift/Views/DashboardView.swift
+++ b/cc_stats_app/swift/Views/DashboardView.swift
@@ -70,6 +70,33 @@ struct DashboardView: View {
                 }
                 .animation(.easeInOut(duration: 0.25), value: toastMessage != nil)
             }
+
+            // Full-view loading overlay
+            ZStack {
+                if viewModel.isLoading {
+                    Color.black.opacity(0.4)
+                        .ignoresSafeArea()
+
+                    VStack(spacing: 16) {
+                        TimelineView(.animation) { timeline in
+                            Circle()
+                                .trim(from: 0, to: 0.7)
+                                .stroke(Theme.cyan, style: StrokeStyle(lineWidth: 3, lineCap: .round))
+                                .frame(width: 40, height: 40)
+                                .rotationEffect(.degrees(timeline.date.timeIntervalSince1970 * 200))
+                        }
+
+                        Text(L10n.loading)
+                            .font(.system(size: 13, weight: .semibold))
+                            .foregroundColor(Theme.textPrimary)
+                    }
+                    .padding(28)
+                    .background(
+                        RoundedRectangle(cornerRadius: 16, style: .continuous)
+                            .fill(Theme.cardBackground.opacity(0.95))
+                    )
+                }
+            }
         }
         .frame(width: 480)
         .frame(maxHeight: 640)
@@ -112,7 +139,8 @@ struct DashboardView: View {
                 )
                 .contentShape(Rectangle())
                 .onTapGesture {
-                    viewModel.activeTab = tab
+                    let source: DataSource = tab == .claudeCode ? .claudeCode : .cursor
+                    viewModel.selectSource(source)
                 }
             }
         }