fix: 为管理员分析面板图表添加独立的多 Y 轴支持

src/lib/components/admin/AnalyticsPanel.svelte

@@ -69,7 +69,8 @@
 						borderColor: '#333',
 						backgroundColor: 'rgba(0,0,0,0.05)',
 						tension: 0.3,
-						fill: true
+						fill: true,
+						yAxisID: 'y'
 					},
 					{
 						label: '缓存命中数',
@@ -77,7 +78,8 @@
 						borderColor: '#4caf50',
 						backgroundColor: 'rgba(76, 175, 80, 0.1)',
 						tension: 0.3,
-						fill: true
+						fill: true,
+						yAxisID: 'y1'
 					}
 				]
 			},
@@ -96,7 +98,19 @@
 				},
 				scales: {
 					y: {
+						type: 'linear',
+						display: true,
+						position: 'left',
 						beginAtZero: true
+					},
+					y1: {
+						type: 'linear',
+						display: true,
+						position: 'right',
+						beginAtZero: true,
+						grid: {
+							drawOnChartArea: false
+						}
 					}
 				}
 			}