fix: update some files

openspec/changes/update-notification-drawer-pagination/specs/notification-center/spec.md

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+## MODIFIED Requirements
+
+### Requirement: Global Notification Bell
+
+The admin frontend SHALL provide a global notification bell in the top navigation near the settings and user avatar entries.
+
+#### Scenario: Display unread count
+
+- **GIVEN** 用户已登录后台
+- **WHEN** 顶部导航加载未读通知数量
+- **THEN** 铃铛 MUST call `GET /api/admin/notifications/unread-count`
+- **AND** 数量 MUST display as `0`, `1` through `99`, or `99+`
+
+#### Scenario: Open paginated notification drawer
+
+- **WHEN** 用户点击顶部通知铃铛
+- **THEN** 页面 MUST display notification items from `GET /api/admin/notifications` using `page=1` and `page_size=10`
+- **AND** 抽屉 MUST provide 全部、审批、临期、同步/系统分类
+- **AND** 抽屉 MUST provide page controls based on the response `total`
+- **AND** changing page MUST replace the visible items instead of appending items from a scroll event
+- **AND** changing category MUST reset the page to 1
+- **AND** 抽屉 MUST provide an entry to `/notifications`