diff --git a/static/js/weather-chart.js b/static/js/weather-chart.js
index 0bafcd8..0521079 100644
--- a/static/js/weather-chart.js
+++ b/static/js/weather-chart.js
@@ -87,8 +87,7 @@ const WeatherChart = {
 				backgroundColor: 'rgba(255, 99, 132, 0.1)',
 				yAxisID: 'y-temperature',
 				tension: 0.4,
-				spanGaps: false,
-				legendGroup: 'history'
+				spanGaps: false
 			},
 			{
 				label: '湿度 (%) - 实测',
@@ -98,8 +97,7 @@ const WeatherChart = {
 				yAxisID: 'y-humidity',
 				tension: 0.4,
 				hidden: true,
-				spanGaps: false,
-				legendGroup: 'history'
+				spanGaps: false
 			},
 			{
 				label: '雨量 (mm) - 实测',
@@ -107,8 +105,7 @@ const WeatherChart = {
 				type: 'bar',
 				backgroundColor: 'rgba(54, 162, 235, 0.6)',
 				borderColor: 'rgb(54, 162, 235)',
-				yAxisID: 'y-rainfall',
-				legendGroup: 'history'
+				yAxisID: 'y-rainfall'
 			},
 			{
 				label: '累计雨量 (mm) - 实测',
@@ -119,17 +116,16 @@ const WeatherChart = {
 				tension: 0.2,
 				spanGaps: false,
 				pointRadius: 0,
-				hidden: true,
-				legendGroup: 'history'
+				hidden: true
 			}
 		];
 
 		if (forecastData.length > 0) {
 			// 雨量 仅显示 -1h/-2h/-3h
 			datasets.push(
-				{ label: '雨量 (mm) - 预报 (+1h)', data: forecastRainfallsH1, type: 'bar', backgroundColor: 'rgba(255, 99, 71, 0.55)', borderColor: 'rgb(255, 99, 71)', yAxisID: 'y-rainfall', legendGroup: 'forecast' },
-				{ label: '雨量 (mm) - 预报 (+2h)', data: forecastRainfallsH2, type: 'bar', backgroundColor: 'rgba(255, 205, 86, 0.55)', borderColor: 'rgb(255, 205, 86)', yAxisID: 'y-rainfall', legendGroup: 'forecast' },
-				{ label: '雨量 (mm) - 预报 (+3h)', data: forecastRainfallsH3, type: 'bar', backgroundColor: 'rgba(76, 175, 80, 0.55)', borderColor: 'rgb(76, 175, 80)', yAxisID: 'y-rainfall', legendGroup: 'forecast' }
+				{ label: '雨量 (mm) - 预报 (+1h)', data: forecastRainfallsH1, type: 'bar', backgroundColor: 'rgba(255, 99, 71, 0.55)', borderColor: 'rgb(255, 99, 71)', yAxisID: 'y-rainfall' },
+				{ label: '雨量 (mm) - 预报 (+2h)', data: forecastRainfallsH2, type: 'bar', backgroundColor: 'rgba(255, 205, 86, 0.55)', borderColor: 'rgb(255, 205, 86)', yAxisID: 'y-rainfall' },
+				{ label: '雨量 (mm) - 预报 (+3h)', data: forecastRainfallsH3, type: 'bar', backgroundColor: 'rgba(76, 175, 80, 0.55)', borderColor: 'rgb(76, 175, 80)', yAxisID: 'y-rainfall' }
 			);
 
 			// 温度 取最接近的预报（0h>1h>2h>3h）
@@ -141,8 +137,7 @@ const WeatherChart = {
 				borderDash: [5, 5],
 				yAxisID: 'y-temperature',
 				tension: 0.4,
-				spanGaps: false,
-				legendGroup: 'forecast'
+				spanGaps: false
 			});
 		}
 
@@ -158,20 +153,6 @@ const WeatherChart = {
 				responsive: true,
 				maintainAspectRatio: false,
 				interaction: { mode: 'index', intersect: false },
-				plugins: {
-					legend: {
-						position: 'top',
-						align: 'center',
-						labels: {
-							boxWidth: 30,
-							padding: 15,
-							font: {
-								size: 11
-							}
-						},
-						maxHeight: 80
-					}
-				},
 				scales: {
 					'y-temperature': { type: 'linear', display: true, position: 'left', title: { display: true, text: '温度 (°C)' } },
 					'y-humidity': { type: 'linear', display: true, position: 'right', title: { display: true, text: '湿度 (%)' }, grid: { drawOnChartArea: false }, min: 0, max: 100 },