chore: display loading during image upload (#3503)

lib/pangea/activity_planner/activity_planner_builder.dart

@@ -172,6 +172,7 @@ class ActivityPlannerBuilderState extends State<ActivityPlannerBuilder> {
     if (mounted) {
       setState(() {
         avatar = bytes;
+        imageURL = null;
         filename = photo.singleOrNull?.name;
       });
     }

lib/pangea/activity_suggestions/activity_suggestion_dialog.dart

@@ -56,8 +56,13 @@ class ActivitySuggestionDialogState extends State<ActivitySuggestionDialog> {
       : MediaQuery.of(context).size.width;
 
   Future<void> _launchActivity() async {
+    try {
+      setState(() {
+        _loading = true;
+        _error = null;
+      });
+
       if (widget.onLaunch != null) {
-      await widget.controller.updateImageURL();
         widget.onLaunch!.call();
         Navigator.of(context).pop();
       } else if (widget.controller.room != null &&
@@ -73,6 +78,22 @@ class ActivitySuggestionDialogState extends State<ActivitySuggestionDialog> {
       } else {
         _setPageMode(_PageMode.roomSelection);
       }
+    } catch (e, s) {
+      _error = e;
+      ErrorHandler.logError(
+        e: e,
+        s: s,
+        data: {
+          "request": widget.controller.updatedRequest.toJson(),
+        },
+      );
+    } finally {
+      if (mounted) {
+        setState(() {
+          _loading = false;
+        });
+      }
+    }
   }
 
   void _setPageMode(_PageMode mode) {