Fix onboarding webhook timeout by running quest creation in background

bot/conversations/onboarding.ts

@@ -155,37 +155,53 @@ export async function onboardingConversation(conversation: BotConversation, ctx:
     return
   }
 
-  const result = await conversation.external(() =>
-    createQuestFromOnboarding({
-      userId,
-      cityId,
-      cityName,
-      days,
-      companions,
-      pace,
-      userComment,
-      lang,
-    })
-  )
-
-  if (!result) {
+  const chatId = ctx.chat?.id
+  if (!chatId) {
     await ctx.reply('Something went wrong. Please try /start again.')
     return
   }
 
-  const appUrl = process.env.APP_URL || 'https://guidly.example.com'
-  const isHttps = appUrl.startsWith('https://')
-  const questText = t(lang, 'quest_created', {
-    title: result.title,
-    description: result.description,
-  }) + (isHttps ? '' : `\n\n🔗 ${appUrl}`)
+  // Run heavy generation in background so webhook handlers can return quickly.
+  void (async () => {
+    try {
+      const result = await createQuestFromOnboarding({
+        userId,
+        cityId,
+        cityName,
+        days,
+        companions,
+        pace,
+        userComment,
+        lang,
+      })
 
-  await ctx.reply(
-    questText,
-    isHttps ? {
-      reply_markup: {
-        inline_keyboard: [[ { text: t(lang, 'open_quest'), web_app: { url: appUrl } } ]],
-      },
-    } : {}
-  )
+      if (!result) {
+        await ctx.api.sendMessage(chatId, 'Something went wrong. Please try /start again.')
+        return
+      }
+
+      const appUrl = process.env.APP_URL || 'https://guidly.example.com'
+      const isHttps = appUrl.startsWith('https://')
+      const questText = t(lang, 'quest_created', {
+        title: result.title,
+        description: result.description,
+      }) + (isHttps ? '' : `\n\n🔗 ${appUrl}`)
+
+      await ctx.api.sendMessage(
+        chatId,
+        questText,
+        isHttps ? {
+          reply_markup: {
+            inline_keyboard: [[{ text: t(lang, 'open_quest'), web_app: { url: appUrl } }]],
+          },
+        } : {}
+      )
+    } catch (error) {
+      console.error('Background quest creation failed:', error)
+      await ctx.api.sendMessage(chatId, 'Something went wrong. Please try /start again.')
+    }
+  })()
+
+  // Conversation finishes immediately; final quest message will be sent by background task.
+  return
 }