fixes #214 correct Wi-Fi check condition to prevent false modal display on upload

The previous condition used `!= ConnectivityResult.wifi`, which failed
when the result was a list of connections (e.g., multiple active interfaces).
Now uses `.contains()` to ensure Wi-Fi is truly absent before showing the modal.

Author: LintyDev

lib/network/upload.dart

@@ -64,7 +64,7 @@ Future<List<int>> uploadPhotos(
   // Check if Wifi is enabled and working before processing
   if (Preferences.getWifiUpload) {
     var connectivity = await Connectivity().checkConnectivity();
-    if (connectivity != ConnectivityResult.wifi) {
+    if (!connectivity.contains(ConnectivityResult.wifi)) {
       if (!(await showConfirmDialog(
         App.navigatorKey.currentContext!,
         title: appStrings.uploadNoWiFiNetwork,