feat: add localization support (zh-Hans + en) with instant language switching

StikJIT/Utilities/AppFeature.swift

@@ -24,57 +24,57 @@ enum AppFeature: String, CaseIterable, Identifiable {
     var title: String {
         switch self {
         case .home:
-            return "Apps"
+            return "Apps".localized
         case .scripts:
-            return "Scripts"
+            return "Scripts".localized
         case .tools:
-            return "Tools"
+            return "Tools".localized
         case .news:
-            return "News"
+            return "News".localized
         case .console:
-            return "Console"
+            return "Console".localized
         case .deviceInfo:
-            return "Device Info"
+            return "Device Info".localized
         case .profiles:
-            return "App Expiry"
+            return "App Expiry".localized
         case .processes:
-            return "Processes"
+            return "Processes".localized
         case .location:
-            return "Location"
+            return "Location".localized
         case .settings:
-            return "Settings"
+            return "Settings".localized
         }
     }
 
     var detail: String {
         switch self {
         case .home:
-            return "Manage installed apps"
+            return "Manage installed apps".localized
         case .scripts:
-            return "Manage and run JS scripts"
+            return "Manage and run JS scripts".localized
         case .tools:
-            return "Access additional tools"
+            return "Access additional tools".localized
         case .news:
-            return "Latest StikDebug updates"
+            return "Latest StikDebug updates".localized
         case .console:
-            return "Live device logs"
+            return "Live device logs".localized
         case .deviceInfo:
-            return "View detailed device metadata"
+            return "View detailed device metadata".localized
         case .profiles:
-            return "Check app expiration dates"
+            return "Check app expiration dates".localized
         case .processes:
-            return "Inspect running apps"
+            return "Inspect running apps".localized
         case .location:
-            return "Simulate GPS location"
+            return "Simulate GPS location".localized
         case .settings:
-            return "Configure StikDebug"
+            return "Configure StikDebug".localized
         }
     }
 
     var toolTitle: String {
         switch self {
         case .location:
-            return "Location Simulation"
+            return "Location Simulation".localized
         default:
             return title
         }

StikJIT/Utilities/LanguageManager.swift

@@ -0,0 +1,18 @@
+import SwiftUI
+
+@Observable
+class LanguageManager {
+    static let shared = LanguageManager()
+
+    var language: String {
+        didSet {
+            UserDefaults.standard.set([language], forKey: "AppleLanguages")
+            UserDefaults.standard.synchronize()
+        }
+    }
+
+    init() {
+        let saved = UserDefaults.standard.stringArray(forKey: "AppleLanguages")?.first ?? "zh-Hans"
+        self.language = saved
+    }
+}