fix online status && license revoke

ControlPanel/server-client.js

@@ -20,9 +20,21 @@ async function callServer(payload, options = {}) {
     headers: { "content-type": "application/json" },
     body: JSON.stringify({ ...payload, adminToken })
   });
-  if (!response.ok) throw new Error(`server 请求失败: HTTP ${response.status}`);
-
-  const result = await response.json();
+  let result = null;
+  try {
+    result = await response.json();
+  } catch {
+    result = null;
+  }
+  if (!response.ok) {
+    const message = result && typeof result.errMsg === "string" && result.errMsg
+      ? result.errMsg
+      : `server 请求失败: HTTP ${response.status}`;
+    throw new Error(message);
+  }
+  if (!result || typeof result !== "object") {
+    throw new Error("server 返回格式无效");
+  }
   if (!result.success) throw new Error(result.errMsg || "server 返回失败");
   return result;
 }