fix(ui): standardize AI sidebar height and scrolling behavior in all editor modes

memento-note/components/note-editor/note-editor-full-page.tsx

@@ -45,7 +45,7 @@ export function NoteEditorFullPage({ onClose }: NoteEditorFullPageProps) {
   return (
     <>
       {/* ── outer container ── */}
-      <div className="h-full flex items-stretch overflow-hidden transition-all duration-500">
+      <div className="h-screen flex items-stretch overflow-hidden transition-all duration-500">
 
         {/* ── main scrollable column ── */}
         <div className="flex-1 flex flex-col overflow-y-auto bg-white dark:bg-background">