fix: resolve build errors and add missing electron IPC

- Replace deprecated reminderId with remindAt in templates
- Add fileSyncListFiles to electron preload
- Fix Typia type narrowing in validate-state.service
- Fix jasmine matcher type in hydrator spec

electron/preload.ts

@@ -45,6 +45,8 @@ const ea: ElectronAPI = {
       dataStr: string | undefined;
     }>,
   fileSyncRemove: (filePath) => _invoke('FILE_SYNC_REMOVE', filePath) as Promise<void>,
+  fileSyncListFiles: ({ dirPath }) =>
+    _invoke('FILE_SYNC_LIST_FILES', dirPath) as Promise<string[] | Error>,
   checkDirExists: (dirPath) =>
     _invoke('CHECK_DIR_EXISTS', dirPath) as Promise<true | Error>,