✨ feat: polish “Missing Models” UX & mobile actions layout

Overview
• Re-designed `MissingModelsModal` to align with `ModelTestModal` and deliver a cleaner, paginated experience.
• Improved mobile responsiveness for action buttons in `ModelsActions`.

Details
1. MissingModelsModal.jsx
   • Switched from `List` to `Table` for a more structured view.
   • Added search bar with live keyword filtering and clear icon.
   • Implemented pagination via `MODEL_TABLE_PAGE_SIZE`; auto-resets on search.
   • Dynamic rendering: when no data, show unified Empty state without column header.
   • Enhanced header layout with total-count subtitle and modal corner rounding.
   • Removed unused `Typography.Text` import.

2. ModelsActions.jsx
   • Set “Delete Selected Models” and “Missing Models” buttons to `flex-1 md:flex-initial`, placing them on the same row as “Add Model” on small screens.

Result
The “Missing Models” workflow now offers quicker discovery, a familiar table interface, and full mobile friendliness—without altering API behavior.

web/src/components/table/models/modals/EditModelModal.jsx

@@ -81,7 +81,7 @@ const EditModelModal = (props) => {
   }, [props.visiable]);
 
   const getInitValues = () => ({
-    model_name: '',
+    model_name: props.editingModel?.model_name || '',
     description: '',
     tags: [],
     vendor_id: undefined,
@@ -136,22 +136,28 @@ const EditModelModal = (props) => {
   useEffect(() => {
     if (formApiRef.current) {
       if (!isEdit) {
-        formApiRef.current.setValues(getInitValues());
+        formApiRef.current.setValues({
+          ...getInitValues(),
+          model_name: props.editingModel?.model_name || '',
+        });
       }
     }
-  }, [props.editingModel?.id]);
+  }, [props.editingModel?.id, props.editingModel?.model_name]);
 
   useEffect(() => {
     if (props.visiable) {
       if (isEdit) {
         loadModel();
       } else {
-        formApiRef.current?.setValues(getInitValues());
+        formApiRef.current?.setValues({
+          ...getInitValues(),
+          model_name: props.editingModel?.model_name || '',
+        });
       }
     } else {
       formApiRef.current?.reset();
     }
-  }, [props.visiable, props.editingModel?.id]);
+  }, [props.visiable, props.editingModel?.id, props.editingModel?.model_name]);
 
   const submit = async (values) => {
     setLoading(true);
@@ -268,7 +274,7 @@ const EditModelModal = (props) => {
                       label={t('模型名称')}
                       placeholder={t('请输入模型名称，如：gpt-4')}
                       rules={[{ required: true, message: t('请输入模型名称') }]}
-                      disabled={isEdit}
+                      disabled={isEdit || !!props.editingModel?.model_name}
                       showClear
                     />
                   </Col>