new: add password visibility toggle on all password fields

Reusable ``password_toggle.blade.php`` partial that wraps every
``input[type=password]`` with an eye icon button. Clicking it
toggles between hidden and visible text. Handles Bootstrap modals
via ``shown.bs.modal`` event. Applied on login, register, password
change (shop + admin), password reset, and first login pages.

resources/views/load/form/password_toggle.blade.php

@@ -0,0 +1,44 @@
+@if (!defined('LOAD_PASSWORD_TOGGLE'))
+    @push('js')
+        <script>
+            function initPasswordToggle(context) {
+                var $ctx = $(context || document);
+                $ctx.find('input[type="password"]').each(function() {
+                    var $input = $(this);
+                    if ($input.closest('.input-group').find('.password-toggle').length) {
+                        return;
+                    }
+                    if (!$input.parent().hasClass('input-group')) {
+                        $input.wrap('<div class="input-group"></div>');
+                    }
+                    var $btn = $('<div class="input-group-append">' +
+                        '<button class="btn btn-outline-secondary password-toggle" type="button" tabindex="-1">' +
+                        '<i class="fa fa-eye"></i>' +
+                        '</button></div>');
+                    $input.after($btn);
+                });
+            }
+
+            $(function() {
+                initPasswordToggle();
+
+                $(document).on('shown.bs.modal', function(e) {
+                    initPasswordToggle(e.target);
+                });
+
+                $(document).on('click', '.password-toggle', function() {
+                    var $btn = $(this);
+                    var $input = $btn.closest('.input-group').find('input');
+                    if ($input.attr('type') === 'password') {
+                        $input.attr('type', 'text');
+                        $btn.find('i').removeClass('fa-eye').addClass('fa-eye-slash');
+                    } else {
+                        $input.attr('type', 'password');
+                        $btn.find('i').removeClass('fa-eye-slash').addClass('fa-eye');
+                    }
+                });
+            });
+        </script>
+    @endpush
+    @php(define('LOAD_PASSWORD_TOGGLE', true))
+@endif