fix: 统一对话密码锁键为发送方加对方不含 IP

internal/auth/stub.go

@@ -94,6 +94,12 @@ func (l *StubLoginLocks) ClearEndpoint(endpointID string) {
 	l.Cleared = append(l.Cleared, endpointID)
 }
 
+func (l *StubLoginLocks) ClearAllForEndpoint(endpointID string) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	l.Cleared = append(l.Cleared, endpointID)
+}
+
 func (l *StubLoginLocks) Clear(LockKey) {}
 
 // 编译期检查：假实现满足接口。