fix: replace all native confirm() dialogs with styled modal macros

Migrated ~68 native browser confirm() calls across 74 files to use the
project's confirm_modal/confirm_modal_dynamic Jinja2 macros, providing
consistent styled confirmation dialogs instead of plain browser popups.

Modules updated: core, tenancy, cms, marketplace, messaging, billing,
customers, orders, cart. Uses danger/warning/info variants and
double-confirm pattern for destructive delete operations.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/tenancy/static/admin/js/stores.js

@@ -25,6 +25,8 @@ function adminStores() {
         },
         loading: false,
         error: null,
+        showDeleteStoreModal: false,
+        storeToDelete: null,
 
         // Search and filters
         filters: {
@@ -283,15 +285,15 @@ function adminStores() {
             window.location.href = url;
         },
 
+        // Prompt delete store
+        promptDeleteStore(store) {
+            storesLog.info('Delete store requested:', store.store_code);
+            this.storeToDelete = store;
+            this.showDeleteStoreModal = true;
+        },
+
         // Delete store
         async deleteStore(store) {
-            storesLog.info('Delete store requested:', store.store_code);
-
-            if (!confirm(`Are you sure you want to delete store "${store.name}"?\n\nThis action cannot be undone.`)) {
-                storesLog.info('Delete cancelled by user');
-                return;
-            }
-
             try {
                 const url = `/admin/stores/${store.store_code}`;
                 window.LogConfig.logApiCall('DELETE', url, null, 'request');
@@ -329,4 +331,4 @@ function adminStores() {
     };
 }
 
-storesLog.info('Stores module loaded');
+storesLog.info('Stores module loaded');