first commit

app/schemas.py

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+from __future__ import annotations
+
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+
+LinkType = Literal["extend", "traffic"]
+
+
+class GuestLinkCreate(BaseModel):
+    link_type: LinkType
+    title: str = Field(default="", max_length=120)
+    value: int = Field(ge=1, le=100000)
+    max_uses: int = Field(default=1, ge=1, le=100000)
+    expires_at: str | None = None
+    note: str = Field(default="", max_length=500)
+
+
+class GuestClaimRequest(BaseModel):
+    identifier: str = Field(min_length=1, max_length=128)
+
+
+class LoginRequest(BaseModel):
+    username: str
+    password: str