Remove unused persona marketplace and discover page files.

public/js/constants.js

@@ -6,7 +6,8 @@ export const requestedChatId = Number(window.location.pathname.match(/^\/app\/ch
 export const onboardingPrompts = {
     ask: ["Explain this topic in simple terms.", "Compare these options and recommend one."],
     brainstorm: ["Give me 10 practical ideas for this problem.", "Suggest 3 creative directions and tradeoffs."],
-    roleplay: ["Start a roleplay scene with immediate tension.", "Give me a dramatic opening with clear stakes."]
+    write: ["Write an opening scene with a strong point of view.", "Help me revise this paragraph while preserving my voice."],
+    learn: ["Teach me this concept step by step.", "Give me a short practice question on this topic."]
 };
 
 // Stable keys preserve existing saved appearance preferences.