feat: add models for physical files, policies, and user management

- Implement PhysicalFile model to manage physical file references and reference counting.
- Create Policy model with associated options and group links for storage policies.
- Introduce Redeem and Report models for handling redeem codes and reports.
- Add Settings model for site configuration and user settings management.
- Develop Share model for sharing objects with unique codes and associated metadata.
- Implement SourceLink model for managing download links associated with objects.
- Create StoragePack model for managing user storage packages.
- Add Tag model for user-defined tags with manual and automatic types.
- Implement Task model for managing background tasks with status tracking.
- Develop User model with comprehensive user management features including authentication.
- Introduce UserAuthn model for managing WebAuthn credentials.
- Create WebDAV model for managing WebDAV accounts associated with users.

sqlmodels/setting.py

@@ -0,0 +1,136 @@
+from enum import StrEnum
+
+from sqlmodel import UniqueConstraint
+
+from .base import SQLModelBase
+from .mixin import TableBaseMixin
+from .user import UserResponse
+
+class CaptchaType(StrEnum):
+    """验证码类型枚举"""
+    DEFAULT = "default"
+    GCAPTCHA = "gcaptcha"
+    CLOUD_FLARE_TURNSTILE = "cloudflare turnstile"
+
+# ==================== DTO 模型 ====================
+
+class SiteConfigResponse(SQLModelBase):
+    """站点配置响应 DTO"""
+
+    title: str = "DiskNext"
+    """网站标题"""
+
+    site_notice: str | None = None
+    """网站公告"""
+
+    user: UserResponse | None = None
+    """用户信息"""
+
+    logo_light: str | None = None
+    """网站Logo URL"""
+
+    logo_dark: str | None = None
+    """网站Logo URL（深色模式）"""
+
+    register_enabled: bool = True
+    """是否允许注册"""
+
+    login_captcha: bool = False
+    """登录是否需要验证码"""
+
+    reg_captcha: bool = False
+    """注册是否需要验证码"""
+
+    forget_captcha: bool = False
+    """找回密码是否需要验证码"""
+
+    captcha_type: CaptchaType = CaptchaType.DEFAULT
+    """验证码类型"""
+
+    captcha_key: str | None = None
+    """验证码 public key（DEFAULT 类型时为 None）"""
+
+
+# ==================== 管理员设置 DTO ====================
+
+class SettingItem(SQLModelBase):
+    """单个设置项 DTO"""
+
+    type: str
+    """设置类型"""
+
+    name: str
+    """设置项名称"""
+
+    value: str | None = None
+    """设置值"""
+
+
+class SettingsListResponse(SQLModelBase):
+    """获取设置列表响应 DTO"""
+
+    settings: list[SettingItem]
+    """设置项列表"""
+
+    total: int
+    """总数"""
+
+
+class SettingsUpdateRequest(SQLModelBase):
+    """更新设置请求 DTO"""
+
+    settings: list[SettingItem]
+    """要更新的设置项列表"""
+
+
+class SettingsUpdateResponse(SQLModelBase):
+    """更新设置响应 DTO"""
+
+    updated: int
+    """更新的设置项数量"""
+
+    created: int
+    """新建的设置项数量"""
+
+
+# ==================== 数据库模型 ====================
+
+class SettingsType(StrEnum):
+    """设置类型枚举"""
+
+    ARIA2 = "aria2"
+    AUTH = "auth"
+    AUTHN = "authn"
+    AVATAR = "avatar"
+    BASIC = "basic"
+    CAPTCHA = "captcha"
+    CRON = "cron"
+    FILE_EDIT = "file_edit"
+    LOGIN = "login"
+    MAIL = "mail"
+    MAIL_TEMPLATE = "mail_template"
+    MOBILE = "mobile"
+    OAUTH = "oauth"
+    PATH = "path"
+    PREVIEW = "preview"
+    PWA = "pwa"
+    REGISTER = "register"
+    RETRY = "retry"
+    SHARE = "share"
+    SLAVE = "slave"
+    TASK = "task"
+    THUMB = "thumb"
+    TIMEOUT = "timeout"
+    UPLOAD = "upload"
+    VERSION = "version"
+    VIEW = "view"
+    WOPI = "wopi"
+
+# 数据库模型
+class Setting(SettingItem, TableBaseMixin):
+    """设置模型，继承 SettingItem 中的 name 和 value 字段"""
+
+    __table_args__ = (UniqueConstraint("type", "name", name="uq_setting_type_name"),)
+
+    type: SettingsType
+    """设置类型/分组（覆盖基类的 str 类型为枚举类型）"""