fix: validate ledger accountId before querying

Reject non-integer account filters instead of sending NaN/0.

src/views/TrafficOpsView/TrafficOpsView.vue

@@ -686,7 +686,15 @@ async function loadLedger() {
   try {
     const params = { pageNum: ledgerPageNum.value, pageSize: ledgerPageSize.value }
     if (ledgerAccountType.value) params.accountType = ledgerAccountType.value
-    if (ledgerAccountId.value) params.accountId = Number(ledgerAccountId.value)
+    const rawId = String(ledgerAccountId.value || '').trim()
+    if (rawId) {
+      const id = Number(rawId)
+      if (!Number.isFinite(id) || id <= 0 || !Number.isInteger(id)) {
+        ui.toast('账户ID须为正整数')
+        return
+      }
+      params.accountId = id
+    }
     const page = await request.get(urls.ADMIN_TRAFFIC_LEDGER, { params })
     ledgerTotal.value = page?.total || 0
     ledgerList.value = (page?.records || []).map((r) => ({