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/auth/service.py

@@ -3,6 +3,8 @@ from __future__ import annotations
 from typing import Protocol
 
 from v1.auth.schemas import (
+    PasswordResetConfirmRequest,
+    PasswordResetRequest,
     SessionCreateRequest,
     SessionRefreshRequest,
     SessionResponse,
@@ -40,6 +42,14 @@ class AuthServiceGateway(Protocol):
     async def get_user_by_email(self, email: str) -> UserByEmailResponse:
         raise NotImplementedError
 
+    async def request_password_reset(self, request: PasswordResetRequest) -> None:
+        raise NotImplementedError
+
+    async def confirm_password_reset(
+        self, request: PasswordResetConfirmRequest
+    ) -> None:
+        raise NotImplementedError
+
 
 class AuthService:
     _gateway: AuthServiceGateway
@@ -71,3 +81,11 @@ class AuthService:
 
     async def get_user_by_email(self, email: str) -> UserByEmailResponse:
         return await self._gateway.get_user_by_email(email)
+
+    async def request_password_reset(self, request: PasswordResetRequest) -> None:
+        await self._gateway.request_password_reset(request)
+
+    async def confirm_password_reset(
+        self, request: PasswordResetConfirmRequest
+    ) -> None:
+        await self._gateway.confirm_password_reset(request)