fix(privacy-indicator): declare appName to prevent QML crash

In strict mode QML, assigning a value to an undeclared variable throws an "Invalid write to global property" error. This commit adds the missing `var` declaration to `appName` in `Main.qml`'s camera detection loop, fixing a bug where the plugin silently crashed and failed to display the camera indicator.

Author: ThomasRitaine

privacy-indicator/Main.qml

@@ -57,7 +57,7 @@ Item {
 
         var appNames = [];
         for (var i = 0; i < apps.length; i++) {
-            appName = apps[i];
+            var appName = apps[i];
             if (filterRegex && appName && filterRegex.test(appName)) continue;
             if (appName && appNames.indexOf(appName) === -1) appNames.push(appName);
         }