feat(shell): add app shell and maintenance page driver

Introduce reusable shell components for layout, tabs, and global overlays.
Add maintenance page model, wrapper component, and composable driver to
standardize maintenance page state, search, and pagination handling.feat(shell): add app shell and maintenance page driver

Introduce reusable shell components for layout, tabs, and global overlays.
Add maintenance page model, wrapper component, and composable driver to
standardize maintenance page state, search, and pagination handling.

src/stores/students.ts

@@ -1,19 +1,8 @@
+import type { StudentRecord } from '@/models/student'
 import { defineStore } from 'pinia'
 import { ref } from 'vue'
 
-export interface StudentRecord {
-  id: number
-  studentId: string
-  name: string
-  department: string
-  grade: number
-  enrollYear: number
-  credits: number
-  advisor: string
-  email: string
-  phone: string
-  status: string
-}
+export type { StudentRecord } from '@/models/student'
 
 const seedStudents: StudentRecord[] = [
   {