frontend: add Model Resolver node context menu icon and spacing

tests/test_downloads_tab_workflow_route.mjs

@@ -131,6 +131,7 @@ test('node context menu groups multiple model inputs and dispatches actions for
   });
 
   assert.equal(menu.title, 'Model Resolver');
+  assert.equal(menu.className, 'mdi mdi-link-variant mr-model-resolver-node-menu');
   assert.equal(menu.submenu.options.length, 2);
   assert.match(menu.submenu.options[0].title, /^CHECKPOINT · ckpt_name/);
   assert.match(menu.submenu.options[1].title, /^VAE · vae_name/);
@@ -232,6 +233,7 @@ test('node context integration preserves existing menu hooks and refreshes after
 
   assert.equal(result, options);
   assert.equal(options[0].title, 'Model Resolver');
+  assert.equal(options[0].className, 'mdi mdi-link-variant mr-model-resolver-node-menu');
   assert.equal(options[1].content, 'Original action');
   assert.equal(node.onWidgetChanged('ckpt_name'), 'widget-result');
   assert.deepEqual(calls, ['original-menu', 'original-widget:ckpt_name', 'refresh']);

web/css/resolver-main.css

@@ -9316,3 +9316,7 @@ a.mr-image-preview-resource-name:hover {
 #model-resolver-modal .mr-missing-detail-pane [id^="local-matches-body-"] .mr-local-alternatives-label {
     color: #bdbdbd;
 }
+
+.litegraph.litecontextmenu .litemenu-entry.mr-model-resolver-node-menu::before {
+    margin-right: 6px;
+}

web/resolver/node_context_menu.js

@@ -123,6 +123,7 @@ export function buildModelResolverNodeMenu(models = [], handlers = {}, options =
 
     return {
         title: 'Model Resolver',
+        className: 'mdi mdi-link-variant mr-model-resolver-node-menu',
         has_submenu: true,
         submenu: {
             options: submenuOptions,