fix: harden startup proxy and coordinate handling

App/ContentView.swift

@@ -4,31 +4,46 @@ struct ContentView: View {
     @StateObject private var setup = SetupCoordinator()
     @ObservedObject private var net = NetworkMonitor.shared
     @State private var showSetup = false
+    @State private var phase: AppPhase = .splash
     @AppStorage("setupCompleted") private var setupCompleted = false
 
+    enum AppPhase { case splash, map }
+
     var body: some View {
-        NavigationView {
-            MapHomeView(setup: setup)
+        Group {
+            switch phase {
+            case .splash:
+                VStack(spacing: 16) {
+                    Image(systemName: "location.fill")
+                        .font(.system(size: 48)).foregroundStyle(.blue)
+                    ProgressView()
+                    Text("正在启动…").font(.subheadline).foregroundStyle(.secondary)
+                }
+            case .map:
+                NavigationView {
+                    MapHomeView(setup: setup)
+                }
+                .fullScreenCover(isPresented: $showSetup) {
+                    FirstSetupView(setup: setup, onComplete: {
+                        setupCompleted = true
+                        setup.completeSetup()
+                        showSetup = false
+                    })
+                }
+            }
         }
         .task {
-            if !setupCompleted {
-                showSetup = true
-                return
+            if !setup.proxy.isRunning {
+                do {
+                    try await setup.proxy.start()
+                } catch {
+                    RuntimeLogger.error("APP", "Startup", "代理启动失败，将在设置检测中重试", error: error)
+                }
             }
-            await setup.refreshTrust()
-        }
-        .onChange(of: net.isAirplaneMode) { airplane in
-            guard setupCompleted else { return }
-            if !airplane {
-                Task { await setup.refreshTrust() }
-            }
-        }
-        .fullScreenCover(isPresented: $showSetup) {
-            FirstSetupView(setup: setup, onComplete: {
-                setupCompleted = true
-                setup.completeSetup()
-                showSetup = false
-            })
+            phase = .map
+            if !setupCompleted { showSetup = true }
+            // Tile probing is a best-effort display refinement and must never block first render.
+            await CoordinateConverter.detectTileByFixedGeocode(force: true)
         }
     }
 }