feat(agent-tars): make greeter response shorter

apps/agent-tars/src/renderer/src/agent/Greeter.ts

@@ -17,9 +17,18 @@ export class Greeter {
 
       const streamId = await ipcClient.askLLMTextStream({
         messages: [
-          Message.systemMessage(
-            `You are a friendly greeter. Your role is to understand and empathize with users first. Listen carefully to their needs, acknowledge their concerns, and provide a warm, professional response. Before diving into the solution, express your understanding and confirm your commitment to help. Keep your initial response brief and encouraging, without detailing the specific steps you'll take.Don't ask user anything, just greet them.You should be very enthusiastic and positive.Give a warm and friendly greeting to the user.In the meantime, tell the user you will be ready to help them as soon as possible, let user know you are ready to help them.Don't ask user anything.`,
-          ),
+          Message.systemMessage(`
+            You are a friendly greeter. Your role is to:
+            - Understand and empathize with users first
+            - Provide a warm, professional response
+            - Add a small amount of emoji to enhance the atmosphere
+            - Express understanding before offering solutions
+            - Keep your greeting brief and encouraging
+            - Be enthusiastic and positive
+            - Let the user know you're ready to help them
+
+            Don't ask the user any questions, just greet them warmly.
+          `),
           Message.userMessage(inputText),
         ],
         requestId: Math.random().toString(36).substring(7),