refactor: 统一状态字段类型为整型并清理冗余配置

1.  将多处字符串类型的状态值"0"统一改为整型0，包括查询条件、字段赋值和状态转换逻辑
2.  移除冗余的OPENAI_BASE_URL配置项及相关示例配置
3.  移动蓝色主题样式代码到variables.scss并删除冗余的theme-blue.scss文件

backend/app/api/v1/module_system/notice/service.py

@@ -109,7 +109,7 @@ class NoticeService:
             offset=0,
             limit=10,
             order_by=[{"id": "asc"}],
-            search={"status": "0"},
+            search={"status": 0},
             out_schema=NoticeOutSchema,
         )
 

backend/app/api/v1/module_system/position/service.py

@@ -198,7 +198,7 @@ class PositionService:
         # 复制数据并转换状态
         data = position_list.copy()
         for item in data:
-            item["status"] = "启用" if item.get("status") == "0" else "停用"
+            item["status"] = "启用" if item.get("status") == 0 else "停用"
             item["creator"] = (
                 item.get("created_by", {}).get("name", "未知")
                 if isinstance(item.get("created_by"), dict)

backend/app/api/v1/module_system/role/service.py

@@ -245,7 +245,7 @@ class RoleService:
         # 处理数据
         data = role_list.copy()
         for item in data:
-            item["status"] = "启用" if item.get("status") == "0" else "停用"
+            item["status"] = "启用" if item.get("status") == 0 else "停用"
             item["data_scope"] = data_scope_map.get(item.get("data_scope", 1), "")
 
         return ExcelUtil.export_list2excel(list_data=data, mapping_dict=mapping_dict)

backend/app/api/v1/module_system/user/service.py

@@ -293,7 +293,7 @@ class UserService:
         if auth.user and auth.user.is_superuser:
             # 使用树形结构查询，预加载children关系（含 type=3 按钮，供前端权限列表使用）
             menu_all = await MenuCRUD(auth).get_tree_list(
-                search={"type": ("in", [1, 2, 3, 4]), "status": "0", **_pc_only},
+                search={"type": ("in", [1, 2, 3, 4]), "status": 0, **_pc_only},
                 order_by=[{"order": "asc"}],
             )
             menus = [MenuOutSchema.model_validate(menu) for menu in menu_all]
@@ -703,7 +703,7 @@ class UserService:
         # creator = {'id': 1, 'name': '管理员', 'username': 'admin'}
         data = user_list.copy()
         for item in data:
-            item["status"] = "启用" if item.get("status") == "0" else "停用"
+            item["status"] = "启用" if item.get("status") == 0 else "停用"
             gender = item.get("gender")
             item["gender"] = "男" if gender == "1" else ("女" if gender == "2" else "未知")
             item["is_superuser"] = "是" if item.get("is_superuser") else "否"