feat: add i18n support for Control Widgets

- Added localization keys to Localizable.xcstrings:
  - vpn_connected (已连接)
  - vpn_disconnected (已断开)
  - vpn_connect (连接)
  - vpn_disconnect (断开)
  - toggle_vpn (切换 VPN)
  - toggle_vpn_connection (切换 VPN 连接)
- Updated ControlWidgetsControl.swift to use LocalizedStringResource

Co-authored-by: chenx-dust <16610294+chenx-dust@users.noreply.github.com>

Author: Copilot

ControlWidgets/ControlWidgetsControl.swift

@@ -23,12 +23,12 @@ struct ControlWidgetsControl: ControlWidget {
                 isOn: isConnected,
                 action: ToggleVPNIntent()
             ) { isOn in
-                Label(isOn ? "Connected" : "Disconnected", systemImage: "network")
-                    .controlWidgetActionHint(isOn ? "Disconnect" : "Connect")
+                Label(isOn ? LocalizedStringResource("vpn_connected") : LocalizedStringResource("vpn_disconnected"), systemImage: "network")
+                    .controlWidgetActionHint(isOn ? LocalizedStringResource("vpn_disconnect") : LocalizedStringResource("vpn_connect"))
             }
         }
         .displayName("EasyTier")
-        .description("Toggle VPN connection")
+        .description(LocalizedStringResource("toggle_vpn_connection"))
     }
 }
 
@@ -49,9 +49,9 @@ extension ControlWidgetsControl {
 }
 
 struct ToggleVPNIntent: SetValueIntent {
-    static let title: LocalizedStringResource = "Toggle VPN"
+    static let title: LocalizedStringResource = "toggle_vpn"
 
-    @Parameter(title: "Connected")
+    @Parameter(title: LocalizedStringResource("vpn_connected"))
     var value: Bool
 
     func perform() async throws -> some IntentResult {

EasyTier/Localizable.xcstrings

@@ -2937,6 +2937,38 @@
         }
       }
     },
+    "toggle_vpn" : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Toggle VPN"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "切换 VPN"
+          }
+        }
+      }
+    },
+    "toggle_vpn_connection" : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Toggle VPN connection"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "切换 VPN 连接"
+          }
+        }
+      }
+    },
     "tunnel_proto" : {
       "localizations" : {
         "en" : {
@@ -3145,6 +3177,70 @@
         }
       }
     },
+    "vpn_connect" : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Connect"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "连接"
+          }
+        }
+      }
+    },
+    "vpn_connected" : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Connected"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "已连接"
+          }
+        }
+      }
+    },
+    "vpn_disconnect" : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Disconnect"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "断开"
+          }
+        }
+      }
+    },
+    "vpn_disconnected" : {
+      "localizations" : {
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Disconnected"
+          }
+        },
+        "zh-Hans" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "已断开"
+          }
+        }
+      }
+    },
     "vpn_portal_client_network" : {
       "localizations" : {
         "en" : {