Refactor server data fetching to batch query all servers in a single API call

src/contexts/ServerContext.tsx

@@ -57,38 +57,58 @@ export function ServerProvider({ children }: { children: ReactNode }) {
   const [lastUpdated, setLastUpdated] = useState(Date.now())
 
   const fetchServerData = async () => {
-    const serverPromises = serverList.map(async (server) => {
-      try {
-        const response = await fetch('/api/server/statistics/a2s-query', {
-          method: 'POST',
-          headers: { 'Content-Type': 'application/json' },
-          body: JSON.stringify({
+    try {
+      // Batch query all servers in a single API call
+      const response = await fetch('/api/server/statistics/a2s-query', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          servers: serverList.map(server => ({
             serverIP: server.ip,
             serverPort: server.port,
             timeout: 3000
-          })
+          }))
         })
+      })
 
-        if (!response.ok) {
-          throw new Error(`HTTP ${response.status}`)
-        }
-
-        const a2sData: A2SResponse = await response.json()
-        return { ...server, a2sData, status: 'online' as const }
-      } catch (error) {
-        console.error(`Failed to fetch data for ${server.name}:`, error)
-        return { 
-          ...server, 
-          status: 'offline' as const, 
-          error: error instanceof Error ? error.message : 'Unknown error' 
-        }
+      if (!response.ok) {
+        throw new Error(`HTTP ${response.status}`)
       }
-    })
 
-    const results = await Promise.all(serverPromises)
-    setServers(results)
-    setLoading(false)
-    setLastUpdated(Date.now())
+      const data = await response.json()
+      const results: ServerData[] = serverList.map((server, index) => {
+        const a2sData = data.results?.[index]
+        
+        if (a2sData) {
+          return {
+            ...server,
+            a2sData,
+            status: 'online' as const
+          }
+        } else {
+          return {
+            ...server,
+            status: 'offline' as const,
+            error: 'No response from server'
+          }
+        }
+      })
+
+      setServers(results)
+      setLoading(false)
+      setLastUpdated(Date.now())
+    } catch (error) {
+      console.error('Failed to fetch server data:', error)
+      // Set all servers to offline on error
+      const offlineServers: ServerData[] = serverList.map(server => ({
+        ...server,
+        status: 'offline' as const,
+        error: error instanceof Error ? error.message : 'Unknown error'
+      }))
+      setServers(offlineServers)
+      setLoading(false)
+      setLastUpdated(Date.now())
+    }
   }
 
   // Initial fetch and polling every 2 seconds