Fix RS dashboard for auths without Web App

RS auths without a valid domain name will not fetch any metadata and
therefore not create a WebApp record. This fixes icons being looked up
anyway, resulting in exceptions

app/components/app_catalog/web_app_icon_component.html.erb

@@ -0,0 +1,5 @@
+<% if @image_url %>
+  <%= image_tag @image_url, class: "h-full w-full" %>
+<% else %>
+  <%= render partial: "icons/remotestorage", locals: { custom_class: "h-full w-full p-0.5 text-gray-200" } %>
+<% end %>

app/components/app_catalog/web_app_icon_component.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+module AppCatalog
+  class WebAppIconComponent < ViewComponent::Base
+    def initialize(web_app:)
+      if web_app&.icon&.attached?
+        @image_url = image_url_for(web_app.icon)
+      elsif web_app&.apple_touch_icon&.attached?
+        @image_url = image_url_for(web_app.apple_touch_icon)
+      end
+    end
+
+    def image_url_for(attachment)
+      if Setting.s3_enabled?
+        s3_image_url(attachment)
+      else
+        Rails.application.routes.url_helpers.rails_blob_path(attachment, only_path: true)
+      end
+    end
+  end
+end

app/components/rs_auth_component.html.erb

@@ -1,16 +1,10 @@
 <div class="flex items-center gap-4">
   <div class="h-16 w-16 flex-none">
-    <% if @web_app.icon.attached? %>
-    <%= image_tag s3_image_url(@web_app.icon), class: "h-full w-full" %>
-    <% elsif @web_app.apple_touch_icon.attached? %>
-    <%= image_tag s3_image_url(@web_app.apple_touch_icon), class: "h-full w-full" %>
-    <% else %>
-    <%= render partial: "icons/remotestorage", locals: { custom_class: "h-full w-full p-0.5 text-gray-200" } %>
-    <% end %>
+    <%= render AppCatalog::WebAppIconComponent.new(web_app: @web_app) %>
   </div>
   <div class="flex-grow">
     <h4 class="mb-1 text-lg font-bold">
-      <%= @web_app.name %>
+      <%= @web_app&.name || @auth.app_name %>
     </h4>
     <p class="text-sm text-gray-500">
       <%= @auth.client_id %>