show avatar dialog instead of default (#4033)

show avatar dialog instead of default

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

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Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

web/src/interfaces/database/chat.ts

@@ -57,6 +57,7 @@ export interface IConversation {
   create_time: number;
   dialog_id: string;
   id: string;
+  avatar: string;
   message: Message[];
   reference: IReference[];
   name: string;