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/context/AppSessionContext.tsx

@@ -0,0 +1,29 @@
+import { createContext, useContext, type ReactNode } from 'react';
+import type { CapabilityMap } from '../types';
+
+type AppSessionContextValue = {
+  capabilities?: CapabilityMap;
+  grantedSkills?: string[];
+};
+
+const AppSessionContext = createContext<AppSessionContextValue>({});
+
+export function AppSessionProvider({
+  capabilities,
+  grantedSkills,
+  children,
+}: {
+  capabilities?: CapabilityMap;
+  grantedSkills?: string[];
+  children: ReactNode;
+}) {
+  return (
+    <AppSessionContext.Provider value={{ capabilities, grantedSkills }}>
+      {children}
+    </AppSessionContext.Provider>
+  );
+}
+
+export function useAppSession() {
+  return useContext(AppSessionContext);
+}