🎯 IMPROVE: Contextual encouragements and pneumatic responses

- Added pneumatic hammer responses to ai-responses.js for engineering questions
- Enhanced server encouragements to be contextual based on question topic
- Removed generic 'smart question' responses
- Added specific responses for compressed air, air pressure, direction, etc.
- Server now provides topic-specific encouragements (pneumatic, bicycle, car)
- Better mechanical engineering focused feedback for students

html/kidsai/ai-responses.js

@@ -75,6 +75,16 @@ const AIResponses = {
         connectControl: "🔧 Excellent mechanical thinking! You understand that cars have systems that connect and control different parts!"
     },
 
+    // Pneumatic tools and compressed air
+    pneumatic: {
+        compressedAir: "🔧 Excellent! You understand that compressed air is the key! That's exactly right - pneumatic tools use compressed air as their power source!",
+        airPressure: "💨 Perfect! Air pressure is exactly what makes pneumatic tools so powerful. You're thinking like an engineer!",
+        direction: "🎯 Great reasoning! You understand that directing the compressed air in a specific direction creates the force. That's brilliant mechanical thinking!",
+        balloon: "🎈 Fantastic connection! Just like a balloon, pneumatic tools use air pressure - but instead of inflating, they use that pressure to create powerful motion!",
+        release: "⚡ Yes! The controlled release of compressed air is what creates the hammer's powerful strikes. You've got the concept!",
+        general: "🔨 You're thinking about the mechanics of pneumatic tools - that's exactly the kind of engineering thinking we need!"
+    },
+
     // Generic responses based on answer quality (last resort)
     generic: {
         veryDetailed: "🌟 I appreciate your detailed explanation! You're really working through this systematically.",