perf: [#395] parallelize home startup data

heatguard-iOS/App/HeatGuardApp.swift

@@ -15,6 +15,7 @@ struct HeatGuardApp: App {
     @State private var showsTeamFlow = false
     @State private var startsAccountRegistration = false
     @State private var pendingInvitationToken: String?
+    @State private var restoredProfile: HGTeamProfile?
 
     var body: some Scene {
         WindowGroup {
@@ -46,6 +47,7 @@ struct HeatGuardApp: App {
             }
         } else if isAuthenticated {
             HomeView(
+                initialProfile: restoredProfile,
                 onSessionEnded: handleSessionEnded,
                 onTeamSelectionRequested: { showsTeamFlow = true }
             )
@@ -77,7 +79,9 @@ struct HeatGuardApp: App {
         try? HGAuthTokenStore(account: "app-session-access-token").clear()
         UserDefaults.standard.removeObject(forKey: "selected-app-site-id")
         do {
-            isAuthenticated = (try await HGAuthenticationService().restoreSession()) != nil
+            let session = try await HGAuthenticationService().restoreSession()
+            restoredProfile = session?.profile
+            isAuthenticated = session != nil
             if isAuthenticated { await routeToSelectedTeamIfNeeded() }
         } catch {
             isAuthenticated = false
@@ -87,6 +91,7 @@ struct HeatGuardApp: App {
 
     @MainActor
     private func routeAuthenticatedSession() async {
+        restoredProfile = nil
         isAuthenticated = true
         await routeToSelectedTeamIfNeeded()
     }
@@ -133,6 +138,7 @@ struct HeatGuardApp: App {
     @MainActor
     private func handleSessionEnded() {
         HGAuthenticationService().endLocalSession()
+        restoredProfile = nil
         isAuthenticated = false
         showsTeamFlow = false
     }

heatguard-iOS/Core/Auth/HGAuthenticationService.swift

@@ -111,8 +111,8 @@ struct HGAuthenticationService {
             return nil
         }
 
-        _ = try await currentProfile()
-        return TeamSession()
+        let profile = try await currentProfile()
+        return TeamSession(profile: profile)
     }
 
     func currentProfile() async throws -> HGTeamProfile {
@@ -327,7 +327,13 @@ private struct PasswordChangeResponse: Decodable {
 
 private struct WithdrawalRequest: Encodable { let currentPassword: String; let reason: String? }
 
-struct TeamSession: Equatable {}
+struct TeamSession: Equatable {
+    let profile: HGTeamProfile?
+
+    init(profile: HGTeamProfile? = nil) {
+        self.profile = profile
+    }
+}
 
 struct HGLoginCredentials: Codable {
     let email: String

heatguard-iOS/Presentation/Features/Home/HomeView.swift

@@ -8,13 +8,15 @@ struct HomeView: View {
 
     init(
         initialDashboard: HomeDashboard? = nil,
+        initialProfile: HGTeamProfile? = nil,
         onSessionEnded: @escaping () -> Void = {},
         onTeamSelectionRequested: @escaping () -> Void = {}
     ) {
         self.onSessionEnded = onSessionEnded
         self.onTeamSelectionRequested = onTeamSelectionRequested
         self.loadsRemoteData = initialDashboard == nil
         _dashboard = State(initialValue: initialDashboard ?? .unavailable)
+        _teamProfile = State(initialValue: initialProfile)
         _checklist = State(initialValue: initialDashboard?.checklist ?? HGChecklistSummary(times: [], checkedCount: nil, totalCount: nil))
         _unreadNotificationCount = State(initialValue: initialDashboard?.unreadNotificationCount ?? 0)
     }
@@ -161,10 +163,15 @@ struct HomeView: View {
         .navigationDestination(for: HomeFlowRoute.self, destination: destinationView)
         .task {
             guard loadsRemoteData else { return }
-            await loadDashboard()
-            await loadProfile()
-            await restoreCurrentEmergencyCall()
             loadStoredDraft()
+            async let dashboardLoad: Void = loadDashboard()
+            async let emergencyLoad: Void = restoreCurrentEmergencyCall()
+            if teamProfile == nil {
+                async let profileLoad: Void = loadProfile()
+                _ = await (dashboardLoad, profileLoad, emergencyLoad)
+            } else {
+                _ = await (dashboardLoad, emergencyLoad)
+            }
         }
         .alert("홈 데이터를 불러오지 못했습니다.", isPresented: dashboardErrorAlert) {
             Button("다시 시도") {