feat(npc): Implement conversation state management and enhance NPC interaction features

server.py

@@ -1,9 +1,7 @@
 #!/usr/bin/env python3
 """
-HTTP Server with proper cache headers for development
-- JSON files: No cache (always fresh)
-- JS/CSS: Short cache (1 hour)
-- Static assets: Longer cache (1 day)
+HTTP Server with zero caching for development
+- ALL files: No cache (always fresh)
 """
 
 import http.server
@@ -17,36 +15,17 @@ PORT = 8000
 
 class NoCacheHTTPRequestHandler(http.server.SimpleHTTPRequestHandler):
     def end_headers(self):
-        now = datetime.utcnow()
-        
-        # Get the file path
-        file_path = self.translate_path(self.path)
-        
-        # Set cache headers based on file type
-        if self.path.endswith('.json'):
-            # JSON files: Always fresh (no cache)
-            self.send_header('Cache-Control', 'no-cache, no-store, must-revalidate, max-age=0')
-            self.send_header('Pragma', 'no-cache')
-            self.send_header('Expires', '0')
-            # IMPORTANT: Override Last-Modified BEFORE calling parent end_headers()
-            self.send_header('Last-Modified', formatdate(timeval=None, localtime=False, usegmt=True))
-        elif self.path.endswith(('.js', '.css')):
-            # JS/CSS: Cache for 1 hour (development)
-            self.send_header('Cache-Control', 'public, max-age=3600')
-        elif self.path.endswith(('.png', '.jpg', '.jpeg', '.gif', '.svg', '.webp')):
-            # Images: Cache for 1 day
-            self.send_header('Cache-Control', 'public, max-age=86400')
-        else:
-            # HTML and other files: No cache
-            self.send_header('Cache-Control', 'no-cache, no-store, must-revalidate, max-age=0')
-            self.send_header('Pragma', 'no-cache')
-            self.send_header('Expires', '0')
+        # Disable all caching for ALL file types
+        self.send_header('Cache-Control', 'no-cache, no-store, must-revalidate, max-age=0, private')
+        self.send_header('Pragma', 'no-cache')
+        self.send_header('Expires', '0')
+        self.send_header('Last-Modified', formatdate(timeval=None, localtime=False, usegmt=True))
         
         # Add CORS headers for local development
         self.send_header('Access-Control-Allow-Origin', '*')
         self.send_header('Access-Control-Allow-Methods', 'GET, OPTIONS')
         
-        # Call parent to add any remaining headers (this will NOT override ours)
+        # Call parent to add any remaining headers
         super().end_headers()
 
 if __name__ == '__main__':
@@ -54,11 +33,7 @@ if __name__ == '__main__':
     
     with socketserver.TCPServer(("", PORT), Handler) as httpd:
         print(f"🚀 Development Server running at http://localhost:{PORT}/")
-        print(f"📄 Cache policy:")
-        print(f"  - JSON files: No cache (always fresh)")
-        print(f"  - JS/CSS: 1 hour cache")
-        print(f"  - Images: 1 day cache")
-        print(f"  - Other: No cache")
+        print(f"📄 Cache policy: ZERO CACHING - all files always fresh")
         print(f"\n⌨️  Press Ctrl+C to stop")
         try:
             httpd.serve_forever()