fix: Remove unused TypeScript imports and variables

- Remove unused ExternalLink import from ModuleStoreView
- Remove unused Tag import from StoreItemsView
- Prefix unused cmd variable with underscore in v-for loop

Fixes production build TypeScript errors.

frontend/src/views/admin/ModuleStoreView.vue

@@ -3,7 +3,7 @@ import { ref, computed, onMounted } from 'vue'
 import { useApi } from '@/composables/useApi'
 import { useAuthStore } from '@/stores/auth'
 import type { Module } from '@/types'
-import { ShoppingCart, Package, Search, Filter, X, Check, Download, AlertCircle, ExternalLink } from 'lucide-vue-next'
+import { ShoppingCart, Package, Search, Filter, X, Check, Download, AlertCircle } from 'lucide-vue-next'
 
 const api = useApi()
 const auth = useAuthStore()

frontend/src/views/admin/StoreItemsView.vue

@@ -2,7 +2,7 @@
 import { ref, computed, onMounted } from 'vue'
 import { useApi } from '@/composables/useApi'
 import type { StoreCategory, StoreItem } from '@/types'
-import { ShoppingBag, Plus, Trash2, RefreshCw, Edit2, DollarSign, X, Tag } from 'lucide-vue-next'
+import { ShoppingBag, Plus, Trash2, RefreshCw, Edit2, DollarSign, X } from 'lucide-vue-next'
 
 const api = useApi()
 
@@ -623,7 +623,7 @@ onMounted(() => {
               <p class="text-neutral-500 mt-2">Example: {{ selectedTypeExample }}</p>
             </div>
             <div class="space-y-2">
-              <div v-for="(cmd, index) in itemForm.delivery_commands" :key="index" class="flex gap-2">
+              <div v-for="(_cmd, index) in itemForm.delivery_commands" :key="index" class="flex gap-2">
                 <input
                   v-model="itemForm.delivery_commands[index]"
                   type="text"