feat: improve chat prompt with model context

Enhances the chat system by providing model context in prompts:
- Adds model name to system prompt for better context awareness
- Makes system prompts more structured with bullet points
- Cleans up text formatting in footer component

This change helps the AI model better understand its context and role when responding to user queries, potentially improving response quality and consistency.

Author: ccbikai

src/components/footer/index.tsx

@@ -36,7 +36,7 @@ export default memo(() => {
               <Text>
                 {' '}
                 {m['footer.sponsors'](null, { locale })}
-                {': '}
+                :
               </Text>
               <Text color="blue">
                 {

src/hooks/chat/index.ts

@@ -137,7 +137,7 @@ export function useChat() {
       cancelChatRef.current = new AbortController()
       const { textStream } = streamText({
         abortSignal: cancelChatRef.current.signal,
-        system: generateChatPrompt(locale),
+        system: generateChatPrompt(locale, model.name),
         messages: [...messages, userMessage],
         model: thinkingModel.includes(model.name)
           ? wrapLanguageModel({

src/hooks/chat/prompt.ts

@@ -4,11 +4,12 @@ export function generateSystemPrompt(locale: string) {
   return `Generate a concise chat title for the provided conversation, using language "${locale}". Only return the chat title. /no_think`
 }
 
-export function generateChatPrompt(locale: string) {
+export function generateChatPrompt(locale: string, model: string) {
   return `${env.AI_MODEL_SYSTEM_PROMPT?.trim()}
 
 ---
 
-user's preferred language is ${locale},
+- You are currently using the ${model} Large Language Model.
+- user's preferred language is ${locale},
 you should use user's preferred language to answer.`
 }