refactor: 重构 Agent 模块为 AgentScope，删除旧版 CrewAI/LiteLLM 实现

backend/src/v1/todo/schemas.py

@@ -0,0 +1,58 @@
+from __future__ import annotations
+from datetime import datetime
+from typing import ClassVar, Literal
+from uuid import UUID
+
+from pydantic import BaseModel, ConfigDict, Field
+
+
+class TodoCreate(BaseModel):
+    model_config: ClassVar[ConfigDict] = ConfigDict(extra="forbid")
+
+    title: str = Field(..., min_length=1, max_length=255)
+    description: str | None = Field(None, max_length=1000)
+    due_at: datetime | None = None
+    priority: int = Field(1, ge=1, le=4)
+    schedule_item_ids: list[UUID] = Field(default_factory=list)
+
+
+class TodoUpdate(BaseModel):
+    model_config: ClassVar[ConfigDict] = ConfigDict(extra="forbid")
+
+    title: str | None = Field(None, min_length=1, max_length=255)
+    description: str | None = Field(None, max_length=1000)
+    due_at: datetime | None = None
+    priority: int | None = Field(None, ge=1, le=4)
+    status: Literal["pending", "done", "canceled"] | None = None
+    schedule_item_ids: list[UUID] | None = None
+
+
+class ScheduleItemBasic(BaseModel):
+    model_config: ClassVar[ConfigDict] = ConfigDict(from_attributes=True)
+
+    id: UUID
+    title: str
+    start_at: datetime
+    end_at: datetime | None
+
+
+class TodoResponse(BaseModel):
+    model_config: ClassVar[ConfigDict] = ConfigDict(from_attributes=True)
+
+    id: UUID
+    owner_id: UUID
+    title: str
+    description: str | None
+    due_at: datetime | None
+    priority: int
+    status: str
+    completed_at: datetime | None
+    created_at: datetime
+    updated_at: datetime
+    schedule_items: list[ScheduleItemBasic] = Field(default_factory=list)
+
+
+class TodoComplete(BaseModel):
+    model_config: ClassVar[ConfigDict] = ConfigDict(extra="forbid")
+
+    pass