Rename product to ML Intern in frontend

Update page title, app header, welcome screen title, and the iframe
'Open' step labels from ML Agent to ML Intern.

frontend/index.html

@@ -4,7 +4,7 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/webp" href="/smolagents.webp" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>ML Agent</title>
+    <title>ML Intern</title>
     <link rel="preconnect" href="https://fonts.googleapis.com" />
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
     <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap" rel="stylesheet" />

frontend/src/components/Layout/AppLayout.tsx

@@ -244,7 +244,7 @@ export default function AppLayout() {
                 fontSize: { xs: '0.88rem', md: '0.95rem' },
               }}
             >
-              ML Agent
+              ML Intern
             </Typography>
           </Box>
 

frontend/src/components/WelcomeScreen/WelcomeScreen.tsx

@@ -271,7 +271,7 @@ export default function WelcomeScreen() {
   const joinOrgStatus: StepStatus = isOrgMember ? 'completed' : isAuthenticated ? 'active' : 'locked';
   const startStatus: StepStatus = isAuthenticated && isOrgMember ? 'active' : 'locked';
 
-  // Space URL for iframe "Open ML Agent" step
+  // Space URL for iframe "Open ML Intern" step
   const spaceHost =
     typeof window !== 'undefined'
       ? window.location.hostname.includes('.hf.space')
@@ -311,7 +311,7 @@ export default function WelcomeScreen() {
           fontSize: { xs: '1.8rem', md: '2.4rem' },
         }}
       >
-        ML Agent
+        ML Intern
       </Typography>
 
       {/* Description */}
@@ -328,7 +328,7 @@ export default function WelcomeScreen() {
           '& strong': { color: 'var(--text)', fontWeight: 600 },
         }}
       >
-        Your <strong>ML intern</strong>. It reads <strong>papers</strong>, finds <strong>datasets</strong>, trains <strong>models</strong>, and iterates until the numbers go up. Instructions in. Trained model out.
+        Your personal <strong>ML agent</strong>. It reads <strong>papers</strong>, finds <strong>datasets</strong>, trains <strong>models</strong>, and iterates until the numbers go up. Instructions in. Trained model out.
       </Typography>
 
       {/* ── Checklist ──────────────────────────────────────────── */}
@@ -370,11 +370,11 @@ export default function WelcomeScreen() {
             />
             <ChecklistStep
               stepNumber={2}
-              title="Open ML Agent"
+              title="Open ML Intern"
               description="Open the agent in a full browser tab to get started."
               status={isOrgMember ? 'active' : 'locked'}
               lockedReason="Join the organization first."
-              actionLabel="Open ML Agent"
+              actionLabel="Open ML Intern"
               actionIcon={<OpenInNewIcon sx={{ fontSize: 16 }} />}
               actionHref={spaceHost}
               isLast