fix: remove duplicate version display from sidebar toolbar

frontend/src/components/AppLayout.tsx

@@ -86,7 +86,7 @@ export default function AppLayout() {
 
   const drawer = (
     <Box sx={{ height: '100%', display: 'flex', flexDirection: 'column' }}>
-      <Toolbar sx={{ justifyContent: 'center', py: 1.5, flexDirection: 'column' }}>
+      <Toolbar sx={{ justifyContent: 'center', py: 1.5 }}>
         <Typography variant="h6" fontWeight={700} sx={{
           background: 'linear-gradient(135deg, #42A5F5 30%, #26C6DA 100%)',
           WebkitBackgroundClip: 'text',
@@ -94,9 +94,6 @@ export default function AppLayout() {
         }}>
           🐉 Patch Manager
         </Typography>
-        <Typography variant="caption" sx={{ color: 'text.secondary', opacity: 0.7, mt: -0.5 }}>
-          v{__APP_VERSION__}
-        </Typography>
       </Toolbar>
       <Divider />
       <Box sx={{ flex: 1, overflowY: 'auto', py: 1 }}>