Rename HF Agent → ML Agent

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/Layout/AppLayout.tsx

@@ -297,7 +297,7 @@ export default function AppLayout() {
                 fontSize: { xs: '0.88rem', md: '0.95rem' },
               }}
             >
-              HF Agent
+              ML Agent
             </Typography>
           </Box>
 

frontend/src/components/WelcomeScreen/WelcomeScreen.tsx

@@ -91,7 +91,7 @@ export default function WelcomeScreen() {
           fontSize: { xs: '2rem', md: '2.8rem' },
         }}
       >
-        HF Agent
+        ML Agent
       </Typography>
 
       {/* Description */}