V 1.5.5 fix: Stundenzahl im 7d-Tooltip entfernt

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

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "wetterstation-frontend",
   "private": true,
-  "version": "1.5.4",
+  "version": "1.5.5",
   "type": "module",
   "scripts": {
     "dev": "vite",

frontend/src/components/WeatherDashboard.jsx

@@ -303,7 +303,7 @@ const WeatherDashboard = ({ data, currentData = [], rainData = [], timeRange = '
           xAxisConfig.labels = { format: '{value:%d.%m}', align: 'center' }
           xAxisMin = now - 7 * 24 * 3600 * 1000
           xAxisMax = now
-          tooltipDateFormat = '%d.%m.%Y - %Hh'
+          tooltipDateFormat = '%d.%m.%Y'
           break
         case '30d':
           xAxisConfig.labels = { format: '{value:%d.%m}', align: 'center' }
@@ -749,7 +749,7 @@ const WeatherDashboard = ({ data, currentData = [], rainData = [], timeRange = '
     ...getCommonOptions(),
     tooltip: {
       formatter: function() {
-        const dateFormat = timeRange === '24h' ? '%d.%m.%Y %H:%M' : (timeRange === '7d' || timeRange === '30d' ? '%d.%m.%Y - %Hh' : '%d.%m.%Y')
+        const dateFormat = timeRange === '24h' ? '%d.%m.%Y %H:%M' : '%d.%m.%Y'
         const dateStr = Highcharts.dateFormat(dateFormat, this.x)
         return `${dateStr}<br/><span style="color:${this.color}">\u25CF</span> ${this.series.name}: <b>${this.y.toFixed(0)}°</b>`
       }