feat: add animation and setup flag

Author: zhouxl

FRW/Services/Router/Coordinator.swift

@@ -63,21 +63,31 @@ final class Coordinator {
     lazy var rootNavi: UINavigationController? = nil
 
     func showRootView() {
+        // Guard against multiple calls
+        guard !isRootViewSetup else {
+            log.warning("[Coordinator] showRootView() called multiple times, ignoring")
+            return
+        }
+        isRootViewSetup = true
+
         // Set initial root view controller synchronously to avoid launch error
-        updateRootView(isEmpty: ProfileManager.shared.profiles.isEmpty)
+        updateRootView(isEmpty: ProfileManager.shared.profiles.isEmpty, animated: false)
 
         // Subscribe to profile changes for dynamic updates
         ProfileManager.shared.$profiles
             .dropFirst() // Skip initial value since we already handled it above
             .receive(on: DispatchQueue.main)
             .sink { [weak self] profiles in
-                self?.updateRootView(isEmpty: profiles.isEmpty)
+                self?.updateRootView(isEmpty: profiles.isEmpty, animated: true)
             }
             .store(in: &cancelSets)
     }
 
     // MARK: Private
 
+    /// Guard against multiple showRootView() calls
+    private var isRootViewSetup = false
+
     /// Track current root state to avoid redundant updates
     private enum RootState {
         case reactNative
@@ -86,30 +96,41 @@ final class Coordinator {
 
     private var currentRootState: RootState?
 
-    private func updateRootView(isEmpty: Bool) {
+    private func updateRootView(isEmpty: Bool, animated: Bool) {
         let targetState: RootState = isEmpty ? .reactNative : .sideContainer
 
         // Avoid redundant updates
         guard currentRootState != targetState else { return }
         currentRootState = targetState
 
+        let newRootNavi: RouterNavigationController
+
         if isEmpty {
             log.info("[Coordinator] profiles empty → show ReactNativeViewController")
             let vc = ReactNativeViewController()
             vc.route = .getStarted
-            let navi = RouterNavigationController(rootViewController: vc)
-            navi.setNavigationBarHidden(true, animated: true)
-            navi.interactivePopGestureRecognizer?.isEnabled = false
-            rootNavi = navi
-            window.rootViewController = rootNavi
+            newRootNavi = RouterNavigationController(rootViewController: vc)
+            newRootNavi.setNavigationBarHidden(true, animated: false)
+            newRootNavi.interactivePopGestureRecognizer?.isEnabled = false
         } else {
             log.info("[Coordinator] profiles exist → show SideContainerView")
             let rootView = SideContainerView()
             let hostingView = UIHostingController(rootView: rootView)
-            let navi = RouterNavigationController(rootViewController: hostingView)
-            navi.setNavigationBarHidden(true, animated: true)
-            rootNavi = navi
-            window.rootViewController = rootNavi
+            newRootNavi = RouterNavigationController(rootViewController: hostingView)
+            newRootNavi.setNavigationBarHidden(true, animated: false)
+        }
+
+        rootNavi = newRootNavi
+
+        if animated {
+            // Smooth transition for dynamic updates
+            newRootNavi.view.alpha = 0
+            window.rootViewController = newRootNavi
+            UIView.animate(withDuration: 0.3) {
+                newRootNavi.view.alpha = 1
+            }
+        } else {
+            window.rootViewController = newRootNavi
         }
     }