优化UI

core/frontend/src/routes/library.tsx

@@ -661,6 +661,7 @@ export function LibraryPage({ onUpload, onDeleteMany }: { onUpload: (formData: F
 
   return (
     <section className={`library-page${editMode ? " manage-mode" : ""}`}>
+      <div className="lib-inner">
       <header className="lib-head">
         <div>
           <h1>成品库</h1>
@@ -978,6 +979,7 @@ export function LibraryPage({ onUpload, onDeleteMany }: { onUpload: (formData: F
       ) : (
         <div className="lib-empty" role="status"><Images /><strong>{emptyHint}</strong><span>对应创作流程生成后会自动入库</span></div>
       )}
+      </div>
 
       <div className={`lib-sel-bar${editMode ? " active" : ""}`} role="toolbar" aria-label="批量操作">
         <div className="lib-sel-copy">