Add AI-assisted world and character drafting flows

apps/web/server/api/worlds/generate.post.ts

@@ -1,7 +1,9 @@
 import { CreateWorldRequestSchema, WorldStarterSchema, moderate13Plus } from '@dng/shared'
 import { buildJsonCompletion, parseJsonCompletion } from '../../utils/ai-provider'
+import { requireStageTwoUser } from '../../utils/stage-two-supabase'
 
 export default defineEventHandler(async event => {
+  await requireStageTwoUser(event)
   const raw = await readBody(event)
   const prompt = typeof raw?.prompt === 'string' ? raw.prompt : ''
   const answers = raw?.answers && typeof raw.answers === 'object' ? raw.answers : {}
@@ -28,9 +30,14 @@ export default defineEventHandler(async event => {
     body: JSON.stringify(completion.body),
   })
   if (!response.ok) throw createError({ statusCode: 502, statusMessage: 'The coauthor is temporarily unavailable.' })
+  let world
   try {
-    return WorldStarterSchema.parse(parseJsonCompletion(await response.json()))
+    world = WorldStarterSchema.parse(parseJsonCompletion(await response.json()))
   } catch {
     throw createError({ statusCode: 502, statusMessage: 'The coauthor returned an invalid world structure.' })
   }
+  if (!moderate13Plus(JSON.stringify(world)).allowed) {
+    throw createError({ statusCode: 422, statusMessage: 'The generated world falls outside the alpha’s 13+ content boundary.' })
+  }
+  return world
 })