fix(테이블타입): CreateTableModal 다이얼로그 flex 레이아웃 — 스크롤 가능한 본문 + 고정 푸터

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/components/admin/CreateTableModal.tsx

@@ -322,7 +322,7 @@ export function CreateTableModal({
 
   return (
     <Dialog open={isOpen} onOpenChange={onClose}>
-      <DialogContent className="max-h-[90vh] max-w-6xl overflow-hidden">
+      <DialogContent className="flex max-h-[90vh] max-w-6xl flex-col overflow-hidden">
         <DialogHeader>
           <DialogTitle className="flex items-center gap-2">
             <Plus className="h-5 w-5" />
@@ -336,7 +336,7 @@ export function CreateTableModal({
           </DialogDescription>
         </DialogHeader>
 
-        <div className="space-y-6">
+        <div className="flex-1 space-y-6 overflow-y-auto pr-1">
           {/* 테이블 기본 정보 */}
           <div className="grid grid-cols-1 gap-4 md:grid-cols-2">
             <div className="space-y-2">