feat(wip): 實現 ChatPrivate

server/data/ChatBean.ts

@@ -1,5 +1,10 @@
 export default class ChatBean {
+    declare type: "paivate" | "group"
     declare id: string
+    declare title?: string
+    declare avatar_file_hash?: string
+    declare user_a_id?: string
+    declare user_b_id?: string
     declare settings: string
 
     [key: string]: unknown