feat: 实现密码重置功能与用户搜索API，优化注册登录流程

- 新增忘记密码页面与重置密码确认流程（前端+后端）
- 修复注册验证码页登录跳转路由
- 新增用户搜索API（按邮箱查询）
- 简化infra脚本，统一为app.sh
- 补充密码重置与用户API测试覆盖
- 更新runtime文档与AGENTS配置

backend/src/v1/users/dependencies.py

@@ -11,11 +11,21 @@ from core.auth.models import CurrentUser
 from core.config.settings import config
 from core.db import get_db
 from core.logging import get_logger
+from v1.auth.gateway import SupabaseAuthGateway
 from v1.users.repository import SQLAlchemyUserRepository
-from v1.users.service import UserService
+from v1.users.service import AuthLookupAdapter, UserService
 
 logger = get_logger("v1.users.dependencies")
 
+_auth_gateway: SupabaseAuthGateway | None = None
+
+
+def get_auth_gateway() -> SupabaseAuthGateway:
+    global _auth_gateway
+    if _auth_gateway is None:
+        _auth_gateway = SupabaseAuthGateway()
+    return _auth_gateway
+
 
 def get_current_user(authorization: str | None = Header(default=None)) -> CurrentUser:
     if not authorization:
@@ -98,4 +108,10 @@ def get_user_service(
     user: Annotated[CurrentUser, Depends(get_current_user)],
 ) -> UserService:
     repository = SQLAlchemyUserRepository(session)
-    return UserService(repository=repository, session=session, current_user=user)
+    auth_gateway = AuthLookupAdapter(get_auth_gateway())
+    return UserService(
+        repository=repository,
+        session=session,
+        current_user=user,
+        auth_gateway=auth_gateway,
+    )