feat (Menu Features): Added a port forwarding button and optimized server storage logic (#1092)

* feat (Menu Features): Added a port forwarding button and optimized server storage logic

Added the `portForward` option to the `ServerFuncBtn` enumeration to support port forwarding

Added duplicate ID checks to `ServerStore` to prevent data conflicts

* fix(server): Fixed the update logic for redirect IDs in server storage

Prevents updates from being skipped when the ID remains unchanged, ensuring that redirect IDs are mapped correctly

* fix(server): Fixed an issue where existing records were not skipped correctly when updating the redirect ID

lib/data/model/app/menu/server_func.dart

@@ -49,6 +49,7 @@ enum ServerFuncBtn {
     //pkg,
     snippet,
     systemd,
+    portForward,
   ].map((e) => e.index).toList();
 
   IconData get icon => switch (this) {