# Change: Add notification entry and unread reminder

## Why

The backend notification contract is documented in `docs/通知.md`, but the frontend does not expose notifications to authenticated agent or enterprise users. Users also have no immediate way to notice newly issued unread messages after signing in.

## What Changes

- Add a notification shortcut to the home page using `src/static/icons/通知.png`.
- Add a notification page that lists the current account's notifications in newest-first order.
- Show the newest unread notification in a reminder modal after a successful login redirects to the home page.
- Mark a notification as read when it is rendered as visible to the user; no manual “mark as read” action is required.
- Do not resolve `target` data and do not navigate from a notification to any controlled resource.
- Display the unread count on the home-page notification entry when it is available.

## Impact

- Affected specs: `notifications` (new capability)
- Affected code: `src/api/notifications.ts`, `src/pages/agent-system/home/index.vue`, `src/pages/agent-system/notifications/index.vue`, `src/pages.json`, and the login-to-home session flow
- Existing user-supplied assets remain in place: `docs/通知.md` and `src/static/icons/通知.png`