fix: Unable to create a new chat assistant after closing the edit modal #1833 (#1838)

### What problem does this PR solve?

fix: Unable to create a new chat assistant after closing the edit modal
#1833

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/chat/hooks.ts

     showModal: showDialogEditModal,
   } = useSetModalState();
 
+  const hideModal = useCallback(() => {
+    setDialog({} as IDialog);
+    hideDialogEditModal();
+  }, [hideDialogEditModal]);
+
   const onDialogEditOk = useCallback(
     async (dialog: IDialog) => {
       const ret = await submitDialog(dialog);
 
       if (ret === 0) {
-        hideDialogEditModal();
+        hideModal();
       }
     },
-    [submitDialog, hideDialogEditModal],
+    [submitDialog, hideModal],
   );
 
   const handleShowDialogEditModal = useCallback(
     initialDialog: dialog,
     onDialogEditOk,
     dialogEditVisible,
-    hideDialogEditModal,
+    hideDialogEditModal: hideModal,
     showDialogEditModal: handleShowDialogEditModal,
     clearDialog,
   };