prepare fastapi root layout for server deployment

app/schemas/case.py

@@ -0,0 +1,76 @@
+from pydantic import BaseModel, ConfigDict
+
+
+class CaseListItem(BaseModel):
+    """病例列表项：不暴露标准答案和隐藏信息。"""
+
+    id: int
+    case_code: str
+    department_id: int
+    title: str
+    difficulty: str
+    chief_complaint: str | None = None
+    supported_training_type: str
+    supported_mode: str
+    has_teaching_video: bool
+    has_knowledge_points: bool
+    has_quiz: bool
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class CaseListResponse(BaseModel):
+    """病例列表响应：返回激活病例集合。"""
+
+    items: list[CaseListItem]
+
+
+class CasePatientInfo(BaseModel):
+    """患者展示信息：用于病例详情页。"""
+
+    name: str | None = None
+    age: int | None = None
+    gender: str | None = None
+    occupation: str | None = None
+
+
+class CaseDetailResponse(BaseModel):
+    """病例详情响应：展示训练入口需要的信息。"""
+
+    id: int
+    case_code: str
+    title: str
+    department: str
+    difficulty: str
+    patient: CasePatientInfo
+    chief_complaint: str | None = None
+    supported_training_type: str
+    supported_mode: str
+    has_teaching_video: bool
+    has_knowledge_points: bool
+    has_quiz: bool
+    order_item_types: list[str]
+
+
+class CaseDeletePreviewResponse(BaseModel):
+    """病例删除预览：返回删除该病例会影响的业务数据数量。"""
+
+    case_id: int
+    case_title: str
+    can_delete: bool
+    affected: dict[str, int]
+
+
+class CaseDeleteRequest(BaseModel):
+    """病例删除请求：前端必须显式确认，并默认同时删除该病例训练数据。"""
+
+    confirm: bool = False
+    delete_training_data: bool = True
+
+
+class CaseDeleteResponse(BaseModel):
+    """病例删除结果：返回已删除的各表记录数量。"""
+
+    deleted: bool
+    case_id: int
+    deleted_counts: dict[str, int]