chore: 基线提交（重构前快照）

重构前保存现有 apps/ 结构基线，供后续各阶段回滚。

Co-Authored-By: Claude <noreply@anthropic.com>

apps/forms/item_cate.py

@@ -0,0 +1,18 @@
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+# 栏目表单验证
+class ItemCateForm(BaseModel):
+    id: Optional[int] = Field(None, description="栏目ID")
+    name: str = Field(..., min_length=1, max_length=150, description="栏目名称")
+    pid: Optional[int] = Field(None, description="上级ID")
+    item_id: int = Field(..., ge=0, description="站点ID")
+    pinyin: str = Field(..., min_length=1, max_length=150, description="拼音全称")
+    code: str = Field(..., min_length=1, max_length=150, description="拼音简称")
+    is_cover: int = Field(..., ge=1, le=2, description="是否有封面")
+    cover: Optional[str] = Field(None, max_length=255, description="栏目封面")
+    status: int = Field(..., ge=1, le=2, description="栏目状态")
+    sort: int = Field(..., ge=0, le=99999, description="栏目排序")
+    note: Optional[str] = Field(None, max_length=255, description="栏目备注")
+