fix: 优化数据

src/store/situationStore.ts

@@ -47,20 +47,36 @@ export function fetchAndSetSituation(): Promise<void> {
 }
 
 let disconnectWs: (() => void) | null = null
+let pollInterval: ReturnType<typeof setInterval> | null = null
+
+const POLL_INTERVAL_MS = 5000
+
+function pollSituation() {
+  fetchSituation()
+    .then((situation) => useSituationStore.getState().setSituation(situation))
+    .catch(() => {})
+}
 
 export function startSituationWebSocket(): () => void {
-  useSituationStore.getState().setConnected(true)
   useSituationStore.getState().setLastError(null)
 
   disconnectWs = connectSituationWebSocket((data) => {
+    useSituationStore.getState().setConnected(true)
     useSituationStore.getState().setSituation(data as MilitarySituation)
   })
 
+  pollSituation()
+  pollInterval = setInterval(pollSituation, POLL_INTERVAL_MS)
+
   return stopSituationWebSocket
 }
 
 export function stopSituationWebSocket(): void {
   disconnectWs?.()
   disconnectWs = null
+  if (pollInterval) {
+    clearInterval(pollInterval)
+    pollInterval = null
+  }
   useSituationStore.getState().setConnected(false)
 }