Add image-designer skill, align billing to DeepSeek ×1, and enrich Plaza demo.

Introduce AI image generation with chat shortcut and agent API, improve MindSpace chat-to-page save resolution, and seed Plaza covers with production deploy scripts.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/utils/chatSkills.ts

@@ -13,7 +13,8 @@ export type ChatSkillIconId =
   | 'form'
   | 'table'
   | 'summary'
-  | 'analyze';
+  | 'analyze'
+  | 'image';
 
 export type ChatSkillOption = {
   id: string;