V 1.6.0 fix: Tagesregen per MAX (kumulierter Tageszähler, Reset um Mitternacht)

Wochenwerte als Summe täglicher Maxima; /weather/stats mit Subquery über tägliche Maxima.

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

frontend/src/App.jsx

@@ -26,8 +26,8 @@ function buildUrls(timeRange) {
     const days  = timeRange.days || 1
     const path = days >= 7 ? 'daily-aggregated-range' : 'hourly-aggregated-range'
     return {
-      weatherUrl:   `${API_BASE}/weather/${path}?start=${start}&end=${end}`,
-      rainUrl:      null,    // TODO: Regen-Aggregation fuer Range implementieren
+      weatherUrl: `${API_BASE}/weather/${path}?start=${start}&end=${end}`,
+      rainUrl:    days < 7 ? `${API_BASE}/weather/daily-aggregated-range?start=${start}&end=${end}` : null,
       needsCurrent: true,
     }
   }

frontend/src/components/WeatherDashboard.jsx

@@ -171,14 +171,14 @@ const WeatherDashboard = ({ data, currentData = [], rainData = [], timeRange = '
   // Spezieller Suffix für Regen
   const rainSuffix = useMemo(() => {
     if (typeof timeRange === 'object' && timeRange.type === 'custom') {
-      const days = timeRange.days || 1
-      return days >= 7 ? ' (pro Tag)' : ''
+      return ' (pro Tag)'
     }
     switch (timeRange) {
       case '7d':
       case '30d':
-      case '365d':
         return ' (pro Tag)'
+      case '365d':
+        return ' (pro Woche)'
       default:
         return ''
     }
@@ -639,11 +639,13 @@ const WeatherDashboard = ({ data, currentData = [], rainData = [], timeRange = '
         }
       }]
     } else if (typeof timeRange === 'object' && timeRange.type === 'custom') {
-      // Custom range: tägliche Summen aus sortedData (total_rain ist im daily-aggregated-range enthalten)
+      // Custom range: tägliche Summen — bei kurzen Ranges (<7d) aus rainData (extra Fetch),
+      // bei langen Ranges aus sortedData (daily-aggregated-range enthält total_rain)
       yAxisTitle = 'Regen (mm pro Tag)'
+      const rainSource = rainData.length > 0 ? rainData : sortedData
       series = [{
         name: 'Regen',
-        data: sortedData
+        data: rainSource
           .filter(item => item.total_rain != null && item.total_rain > 0)
           .map(item => [new Date(item.datetime).getTime(), item.total_rain]),
         color: 'rgb(54, 162, 235)',