- MVP架构重构聊天逻辑

- 优化聊天气泡体验
- 修复prompt bug
- 实现聊天次数限制功能（未接服务端）
- 实现情绪切视频功能

assets/Scripts/chat18x/data/DialogData.ts

@@ -1,6 +1,7 @@
 export interface Dialog {
   isPlayer: boolean;
   content: string;
+  isLoading?: boolean;
 }
 
 export class DemoData {
@@ -10,9 +11,9 @@ export class DemoData {
     this.Dialogs = [];
   }
 
-  public pushDialog(isPlayer: boolean, str: string) {
+  public pushDialog(isPlayer: boolean, str: string, isLoading: boolean = false) {
     if (!this.Dialogs) this.Dialogs = [];
-    this.Dialogs.push({ isPlayer: isPlayer, content: str });
+    this.Dialogs.push({ isPlayer: isPlayer, content: str, isLoading: isLoading });
   }
 
   public GetDialogs() {