feat(notifications): add notification system and wire order/dispute events

store/notifications.ts

@@ -1,14 +1,47 @@
 import { create } from "zustand"
+import { generateId } from "@/lib/id"
 import { mockNotifications } from "@/lib/mock"
 import type { Notification } from "@/lib/types"
 
+interface CreateNotificationInput {
+  type: Notification["type"]
+  title: string
+  content: string
+  link?: string
+}
+
 interface NotificationState {
   notifications: Notification[]
+  addNotification: (input: CreateNotificationInput) => Notification
+  markAsRead: (notificationId: string) => void
   markAllAsRead: () => void
 }
 
 export const useNotificationStore = create<NotificationState>((set) => ({
   notifications: mockNotifications,
+  addNotification: (input) => {
+    const notification: Notification = {
+      id: generateId("notif"),
+      type: input.type,
+      title: input.title,
+      content: input.content,
+      link: input.link,
+      read: false,
+      createdAt: new Date().toISOString(),
+    }
+
+    set((state) => ({
+      notifications: [notification, ...state.notifications],
+    }))
+
+    return notification
+  },
+  markAsRead: (notificationId) =>
+    set((state) => ({
+      notifications: state.notifications.map((notification) =>
+        notification.id === notificationId ? { ...notification, read: true } : notification,
+      ),
+    })),
   markAllAsRead: () =>
     set((state) => ({
       notifications: state.notifications.map((notification) => ({ ...notification, read: true })),