优化无法登录的错误

server/geo-service.js

@@ -31,8 +31,19 @@ function normalizeGeo(geo) {
 }
 
 async function getLocation(target) {
-  // Normalize target (strip port if present)
-  const cleanTarget = target.split(':')[0];
+  // Normalize target (strip port if present, handle IPv6 brackets)
+  let cleanTarget = target;
+  if (cleanTarget.startsWith('[')) {
+    const closingBracket = cleanTarget.indexOf(']');
+    if (closingBracket !== -1) {
+      cleanTarget = cleanTarget.substring(1, closingBracket);
+    }
+  } else {
+    const parts = cleanTarget.split(':');
+    if (parts.length === 2) {
+      cleanTarget = parts[0];
+    }
+  }
 
   // 1. Check if we already have this IP/Domain in DB (FASTEST)
   try {