feat: update clustering implementation and docs

frontend/src/views/Clustering.vue

@@ -105,7 +105,7 @@ async function initScatterChart() {
       type: 'scatter',
       data: points,
       symbolSize: 9,
-      name: `群体${Number(id) + 1}`
+      name: data.cluster_names?.[id] || `群体${Number(id) + 1}`
     }))
   })
 }