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>

static/admin/js/module-config.js

@@ -17,6 +17,9 @@ function adminModuleConfig(platformCode, moduleCode) {
         successMessage: null,
         saving: false,
 
+        // Reset confirm state
+        showResetConfirm: false,
+
         // Data
         platformId: null,
         platformName: '',
@@ -117,10 +120,6 @@ function adminModuleConfig(platformCode, moduleCode) {
         },
 
         async resetToDefaults() {
-            if (!confirm('This will reset all configuration options to their default values. Continue?')) {
-                return;
-            }
-
             this.saving = true;
             this.error = null;
             this.successMessage = null;