Fixed issues with uploads (profile, presentation, branding) (#5590)

app/controllers/api/v1/admin/site_settings_controller.rb

@@ -35,7 +35,7 @@ module Api
           render_data data: site_settings, status: :ok
         end
 
-        # GET /api/v1/admin/site_settings/:name.json
+        # PATCH /api/v1/admin/site_settings/:name.json
         # Updates the value of the specified Site Setting
         def update
           site_setting = SiteSetting.joins(:setting)

app/javascript/hooks/mutations/admin/site_settings/useUpdateSiteSetting.jsx

@@ -35,7 +35,11 @@ export default function useUpdateSiteSetting(name) {
       settings = data;
     }
 
-    return axios.patch(`/admin/site_settings/${name}.json`, settings);
+    return axios.patch(`/admin/site_settings/${name}.json`, settings, {
+      headers: {
+        'Content-Type': 'multipart/form-data',
+      },
+    });
   };
 
   const handleSuccess = () => {

app/javascript/hooks/mutations/rooms/useUploadPresentation.jsx

@@ -28,7 +28,11 @@ export default function useUploadPresentation(friendlyId) {
     fileValidation(presentation, 'presentation');
     const formData = new FormData();
     formData.append('room[presentation]', presentation);
-    return axios.patch(`/rooms/${friendlyId}.json`, formData);
+    return axios.patch(`/rooms/${friendlyId}.json`, formData, {
+      headers: {
+        'Content-Type': 'multipart/form-data',
+      },
+    });
   };
 
   const mutation = useMutation(uploadPresentation, {

app/javascript/hooks/mutations/users/useCreateAvatar.jsx

@@ -30,7 +30,11 @@ export default function useCreateAvatar(currentUser) {
     });
     const formData = new FormData();
     formData.append('user[avatar]', avatarBlob);
-    return axios.patch(`/users/${currentUser.id}.json`, formData);
+    return axios.patch(`/users/${currentUser.id}.json`, formData, {
+      headers: {
+        'Content-Type': 'multipart/form-data',
+      },
+    });
   }
 
   const mutation = useMutation(