feat: 添加 notification store 模块

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

my-uniapp-vue3/src/store/notification.ts

@@ -0,0 +1,86 @@
+import { defineStore } from 'pinia';
+import { ref, computed } from 'vue';
+
+export interface Notification {
+  id: string;
+  type: 'audio_complete' | 'video_complete' | 'content_complete' | 'error';
+  title: string;
+  message: string;
+  bookId?: string | number;
+  timestamp: number;
+  read: boolean;
+}
+
+const STORAGE_KEY = 'app_notifications';
+
+function loadFromStorage(): Notification[] {
+  try {
+    const data = uni.getStorageSync(STORAGE_KEY);
+    return data ? JSON.parse(data) : [];
+  } catch {
+    return [];
+  }
+}
+
+function saveToStorage(notifications: Notification[]) {
+  try {
+    uni.setStorageSync(STORAGE_KEY, JSON.stringify(notifications));
+  } catch (e) {
+    console.error('[Notification] 保存失败:', e);
+  }
+}
+
+export const useNotificationStore = defineStore('notification', () => {
+  const notifications = ref<Notification[]>(loadFromStorage());
+
+  const unreadCount = computed(() => notifications.value.filter(n => !n.read).length);
+
+  function add(notif: Omit<Notification, 'id' | 'timestamp' | 'read'>) {
+    const id = `notif_${Date.now()}_${Math.random().toString(36).substr(2, 6)}`;
+    const notification: Notification = {
+      ...notif,
+      id,
+      timestamp: Date.now(),
+      read: false,
+    };
+    notifications.value.unshift(notification);
+    // 最多保留 50 条
+    if (notifications.value.length > 50) {
+      notifications.value = notifications.value.slice(0, 50);
+    }
+    saveToStorage(notifications.value);
+  }
+
+  function markRead(id: string) {
+    const n = notifications.value.find(item => item.id === id);
+    if (n) {
+      n.read = true;
+      saveToStorage(notifications.value);
+    }
+  }
+
+  function markAllRead() {
+    notifications.value.forEach(n => { n.read = true; });
+    saveToStorage(notifications.value);
+  }
+
+  function remove(id: string) {
+    notifications.value = notifications.value.filter(n => n.id !== id);
+    saveToStorage(notifications.value);
+  }
+
+  function clear() {
+    notifications.value = [];
+    saveToStorage(notifications.value);
+  }
+
+  return {
+    notifications,
+    unreadCount,
+    add,
+    markRead,
+    markAllRead,
+    remove,
+    clear,
+  };
+});