feat:Receiver adds a secure save button

Receiver adds a secure save button, used to save cache files during connection interruptions, making it convenient to resume transfers next time.
Button tooltip information added in multiple languages.

frontend/types/messages.ts

@@ -191,6 +191,9 @@ export type FileListDisplay = {
   PopupDialog_description: string;
   chooseSavePath_tips: string;
   chooseSavePath_dis: string;
+  safeSave_dis: string;
+  safeSave_tooltip: string;
+  safeSaveSuccessMsg: string;
 };
 
 export type RetrieveMethod = {
@@ -225,6 +228,8 @@ export type RoomStatus = {
   onlyOneMsg: string;
   peopleMsg_template: string;
   connected_dis: string;
+  senderDisconnectedMsg: string;
+  leftRoomMsg: string;
 };
 
 export type ClipboardAppHtml = {