diff --git a/pyproject.toml b/pyproject.toml
index af07d21..54390bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,6 +16,7 @@ dependencies = [
     "psycopg[binary]>=3.1.18",
     "websockets>=16.0",
     "path>=17.1.1",
+    "httpx>=0.28.1",
 ]
 
 [project.optional-dependencies]
diff --git a/src/core/register.py b/src/core/register.py
index 4082e83..d3cdf75 100644
--- a/src/core/register.py
+++ b/src/core/register.py
@@ -358,6 +358,28 @@ class RegistrationEngine:
             self._log(f"初始化会话失败: {e}", "error")
             return False
 
+    def close(self):
+        """关闭注册流程占用的资源"""
+        if self.session:
+            try:
+                self.session.close()
+            except Exception as e:
+                self._log(f"关闭注册会话失败: {e}", "warning")
+            finally:
+                self.session = None
+
+        try:
+            self.http_client.close()
+        except Exception as e:
+            self._log(f"关闭 HTTP 客户端失败: {e}", "warning")
+
+        close_email_service = getattr(self.email_service, "close", None)
+        if callable(close_email_service):
+            try:
+                close_email_service()
+            except Exception as e:
+                self._log(f"关闭邮箱服务失败: {e}", "warning")
+
     def _get_device_id(self) -> Optional[str]:
         """获取 Device ID"""
         if not self.oauth_start: