feat: respond in user's language, style fixes and research depth fixes

lib/feedback.ts

@@ -2,7 +2,7 @@ import { streamText } from 'ai'
 import { z } from 'zod'
 import { zodToJsonSchema } from 'zod-to-json-schema'
 
-import { systemPrompt } from './prompt'
+import { languagePrompt, systemPrompt } from './prompt'
 import { useAiModel } from '~/composables/useAiProvider'
 
 type PartialFeedback = DeepPartial<z.infer<typeof feedbackTypeSchema>>
@@ -13,9 +13,11 @@ export const feedbackTypeSchema = z.object({
 
 export function generateFeedback({
   query,
+  language,
   numQuestions = 3,
 }: {
   query: string
+  language: string
   numQuestions?: number
 }) {
   const schema = z.object({
@@ -27,6 +29,7 @@ export function generateFeedback({
   const prompt = [
     `Given the following query from the user, ask ${numQuestions} follow up questions to clarify the research direction. Return a maximum of ${numQuestions} questions, but feel free to return less if the original query is clear: <query>${query}</query>`,
     `You MUST respond in JSON with the following schema: ${jsonSchema}`,
+    languagePrompt(language),
   ].join('\n\n')
 
   const stream = streamText({