V 1.5.4 Regen-Chart: interaktive Legende zum Ein-/Ausschalten der Linien

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "wetterstation-frontend",
   "private": true,
-  "version": "1.5.3",
+  "version": "1.5.4",
   "type": "module",
   "scripts": {
     "dev": "vite",

frontend/src/components/WeatherDashboard.jsx

@@ -657,6 +657,13 @@ const WeatherDashboard = ({ data, currentData = [], rainData = [], timeRange = '
     
     return {
       ...getCommonOptions(),
+      legend: {
+        enabled: series.length > 1,
+        align: 'right',
+        verticalAlign: 'top',
+        floating: true,
+        itemStyle: { fontSize: '11px', fontWeight: 'normal' }
+      },
       yAxis: {
         ...getCommonOptions().yAxis,
         title: { text: null }