#29 refactor: replace admin code with role-based auth using Pinia

src/stores/auth.js

@@ -0,0 +1,19 @@
+import { defineStore } from 'pinia'
+
+export const useAuthStore = defineStore('auth', {
+  state: () => ({
+    user: null
+  }),
+  getters: {
+    isAdmin: (state) => state.user?.role === 'administrator',
+    isAuthenticated: (state) => !!state.user
+  },
+  actions: {
+    setUser(user) {
+      this.user = user
+    },
+    clearUser() {
+      this.user = null
+    }
+  }
+})