fix routing

client/src/components/Level.tsx

@@ -161,8 +161,8 @@ function Level() {
       </Grid>
       <Grid xs={4} className="info-panel">
 
-        <Button disabled={levelId <= 1} component={RouterLink} to={`/level/${levelId - 1}`} sx={{ ml: 3, mt: 2, mb: 2 }} disableFocusRipple>Previous Level</Button>
-        <Button disabled={false} component={RouterLink} to={`/level/${levelId + 1}`} sx={{ ml: 3, mt: 2, mb: 2 }} disableFocusRipple>Next Level</Button>
+        <Button disabled={levelId <= 1} component={RouterLink} to={`/world/${worldId}/level/${levelId - 1}`} sx={{ ml: 3, mt: 2, mb: 2 }} disableFocusRipple>Previous Level</Button>
+        <Button disabled={false} component={RouterLink} to={`/world/${worldId}/level/${levelId + 1}`} sx={{ ml: 3, mt: 2, mb: 2 }} disableFocusRipple>Next Level</Button>
 
         <div style={{display: expertInfoview ? 'block' : 'none' }} ref={infoviewRef} className="infoview vscode-light"></div>
         <div style={{display: expertInfoview ? 'none' : 'block' }}>