refactor: 大规模代码整理与功能优化

1. 重构后端API路由、CRUD与模块结构，整合日志管理，移除废弃demo代码
2. 优化前端组件类型定义、样式与路由配置，修复权限判断逻辑
3. 调整默认排序规则、滚动条样式与工具类函数，更新依赖与配置文件
4. 修复多处类型不匹配与默认值问题，完善表单与菜单验证逻辑

backend/app/scripts/data/sys_notice_read.json

@@ -0,0 +1,52 @@
+[
+  {
+    "user_id": 1,
+    "notice_id": 1,
+    "read_time": "2025-06-01 09:15:00"
+  },
+  {
+    "user_id": 1,
+    "notice_id": 2,
+    "read_time": "2025-06-10 08:30:00"
+  },
+  {
+    "user_id": 1,
+    "notice_id": 3,
+    "read_time": "2025-07-01 10:00:00"
+  },
+  {
+    "user_id": 2,
+    "notice_id": 1,
+    "read_time": "2025-06-01 09:20:00"
+  },
+  {
+    "user_id": 2,
+    "notice_id": 2,
+    "read_time": "2025-06-10 09:00:00"
+  },
+  {
+    "user_id": 3,
+    "notice_id": 1,
+    "read_time": "2025-06-01 10:30:00"
+  },
+  {
+    "user_id": 4,
+    "notice_id": 1,
+    "read_time": "2025-06-02 14:00:00"
+  },
+  {
+    "user_id": 5,
+    "notice_id": 1,
+    "read_time": "2025-06-03 11:00:00"
+  },
+  {
+    "user_id": 6,
+    "notice_id": 6,
+    "read_time": "2025-06-20 10:00:00"
+  },
+  {
+    "user_id": 8,
+    "notice_id": 2,
+    "read_time": "2025-06-10 16:00:00"
+  }
+]