feat: enhance error handling in DashboardPage and add retry functionality

src/pages/DashboardPage.tsx

@@ -46,26 +46,38 @@ export function DashboardPage() {
 
   const fetchStatistics = useCallback(async () => {
     try {
-      const [soundboardResponse, trackResponse] = await Promise.all([
-        fetch('/api/v1/dashboard/soundboard-statistics', {
-          credentials: 'include',
-        }),
-        fetch('/api/v1/dashboard/track-statistics', { credentials: 'include' }),
-      ])
+      setError(null) // Clear previous errors
 
-      if (!soundboardResponse.ok || !trackResponse.ok) {
-        throw new Error('Failed to fetch statistics')
+      // Fetch soundboard statistics
+      const soundboardResponse = await fetch('/api/v1/dashboard/soundboard-statistics', {
+        credentials: 'include',
+      })
+
+      if (!soundboardResponse.ok) {
+        const errorText = await soundboardResponse.text()
+        throw new Error(`Failed to fetch soundboard statistics: ${errorText}`)
       }
 
-      const [soundboardData, trackData] = await Promise.all([
-        soundboardResponse.json(),
-        trackResponse.json(),
-      ])
-
+      const soundboardData = await soundboardResponse.json()
       setSoundboardStatistics(soundboardData)
+
+      // Fetch track statistics separately to avoid Promise.all failures
+      const trackResponse = await fetch('/api/v1/dashboard/track-statistics', { 
+        credentials: 'include' 
+      })
+
+      if (!trackResponse.ok) {
+        const errorText = await trackResponse.text()
+        throw new Error(`Failed to fetch track statistics: ${errorText}`)
+      }
+
+      const trackData = await trackResponse.json()
       setTrackStatistics(trackData)
+
     } catch (err) {
+      console.error('Dashboard statistics error:', err)
       setError(err instanceof Error ? err.message : 'An error occurred')
+      // Don't reset the statistics to null on error, keep previous data if available
     }
   }, [])
 
@@ -125,12 +137,26 @@ export function DashboardPage() {
   const refreshAll = useCallback(async () => {
     setRefreshing(true)
     try {
-      await Promise.all([fetchStatistics(), fetchTopSounds()])
+      // Fetch statistics and top sounds sequentially to avoid Promise.all issues
+      await fetchStatistics()
+      await fetchTopSounds()
+    } catch (err) {
+      console.error('Error during refresh:', err)
     } finally {
       setRefreshing(false)
     }
   }, [fetchStatistics, fetchTopSounds])
 
+  const retryFromError = useCallback(async () => {
+    setLoading(true)
+    setError(null)
+    try {
+      await fetchStatistics()
+    } finally {
+      setLoading(false)
+    }
+  }, [fetchStatistics])
+
   useEffect(() => {
     const loadInitialData = async () => {
       setLoading(true)
@@ -144,14 +170,17 @@ export function DashboardPage() {
     loadInitialData()
   }, [])
 
-  // Auto-refresh every 5 seconds
+  // Auto-refresh every 30 seconds (reduced frequency to avoid issues)
   useEffect(() => {
     const interval = setInterval(() => {
-      refreshAll()
-    }, 5000)
+      // Only auto-refresh if not currently loading or in error state
+      if (!loading && !refreshing && (!error || (soundboardStatistics && trackStatistics))) {
+        refreshAll()
+      }
+    }, 30000) // Increased to 30 seconds
 
     return () => clearInterval(interval)
-  }, [refreshAll])
+  }, [refreshAll, loading, refreshing, error, soundboardStatistics, trackStatistics])
 
   useEffect(() => {
     fetchTopSounds(true) // Show loading on initial load and filter changes
@@ -161,8 +190,8 @@ export function DashboardPage() {
     return <LoadingSkeleton />
   }
 
-  if (error || !soundboardStatistics || !trackStatistics) {
-    return <ErrorState error={error || 'Failed to load statistics'} />
+  if (error && (!soundboardStatistics || !trackStatistics)) {
+    return <ErrorState error={error} onRetry={retryFromError} />
   }
 
   return (
@@ -175,10 +204,12 @@ export function DashboardPage() {
         <DashboardHeader onRefresh={refreshAll} isRefreshing={refreshing} />
         
         <div className="space-y-6">
-          <StatisticsGrid
-            soundboardStatistics={soundboardStatistics}
-            trackStatistics={trackStatistics}
-          />
+          {soundboardStatistics && trackStatistics && (
+            <StatisticsGrid
+              soundboardStatistics={soundboardStatistics}
+              trackStatistics={trackStatistics}
+            />
+          )}
           
           <TopSoundsSection
             topSounds={topSounds}