fix:小组件- PUSH

server/app/db/models/push_token.py

@@ -0,0 +1,63 @@
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Literal
+
+from sqlalchemy import Boolean, DateTime, Enum, Index, String, UniqueConstraint, func
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.db.base import Base
+
+PushEnv = Literal["dev", "prod"]
+PushPlatform = Literal["ios", "android"]
+
+
+class PushToken(Base):
+    """
+    Push Token 绑定表（Expo Push Token）。
+
+    约束：
+    - token 在同一 env + app_id 下必须唯一（避免重复推送）
+    - 同一 client_user_id 可能会更新 token（重装/轮换/重新授权）
+    """
+
+    __tablename__ = "push_tokens"
+
+    __table_args__ = (
+        UniqueConstraint("env", "app_id", "push_token", name="uniq_env_app_token"),
+        Index("idx_push_tokens_client_user_id", "client_user_id"),
+        Index("idx_push_tokens_is_active", "is_active"),
+    )
+
+    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True, comment="主键")
+
+    client_user_id: Mapped[str] = mapped_column(String(length=64), nullable=False, comment="客户端用户标识（UUID）")
+    platform: Mapped[PushPlatform] = mapped_column(
+        Enum("ios", "android", name="push_platform"),
+        nullable=False,
+        comment="平台",
+    )
+
+    push_token: Mapped[str] = mapped_column(String(length=255), nullable=False, comment="Expo Push Token")
+    app_id: Mapped[str] = mapped_column(String(length=255), nullable=False, comment="bundle id / package name（用于隔离）")
+    env: Mapped[PushEnv] = mapped_column(
+        Enum("dev", "prod", name="push_env"),
+        nullable=False,
+        comment="环境隔离",
+    )
+
+    is_active: Mapped[bool] = mapped_column(
+        Boolean,
+        nullable=False,
+        server_default="1",
+        comment="是否有效（发送失败且不可恢复时置为 false）",
+    )
+
+    last_seen_at: Mapped[datetime] = mapped_column(
+        DateTime,
+        nullable=False,
+        server_default=func.now(),
+        server_onupdate=func.now(),
+        comment="最后一次上报时间",
+    )
+