From 68d2e78d771970a0a7a62f31e21af754a0518ed5 Mon Sep 17 00:00:00 2001
From: unknown <kate522@88.com>
Date: Fri, 17 Jul 2026 15:40:20 +0800
Subject: [PATCH] fix(ns): class_exists() must use FQCN after PSR-4
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Bare class_exists('Balance') looks up global Balance, always false
under AKSRT\* namespaces → REST 403 on balance exchange and friends.
Rewrite string checks to AKSRT\{Domain}\{Class}.
---
 src/AKSRT/Admin/Native/PayMenus.php        | 20 ++++++++++----------
 src/AKSRT/Admin/Native/PayOrders.php       |  6 +++---
 src/AKSRT/Ai/AISEO.php                     |  4 ++--
 src/AKSRT/Auth/EmailRollback.php           |  2 +-
 src/AKSRT/Auth/OAuth.php                   |  2 +-
 src/AKSRT/Content/Download.php             |  2 +-
 src/AKSRT/Content/DownloadState.php        |  2 +-
 src/AKSRT/Core/PostMetaBox.php             | 12 ++++++------
 src/AKSRT/Core/ResourceMetaBox.php         |  2 +-
 src/AKSRT/Core/Shortcodes.php              |  4 ++--
 src/AKSRT/Credits/BalanceServiceCharge.php |  6 +++---
 src/AKSRT/Credits/BalanceServicePoints.php |  6 +++---
 src/AKSRT/Credits/BalanceServiceRest.php   | 14 +++++++-------
 src/AKSRT/Credits/Earn.php                 | 20 ++++++++++----------
 src/AKSRT/Credits/Invite.php               |  2 +-
 src/AKSRT/Credits/PointsFree.php           |  2 +-
 src/AKSRT/Credits/Signin.php               |  8 ++++----
 src/AKSRT/Forum/Forum.php                  |  2 +-
 src/AKSRT/Forum/PlateFollowPay.php         |  8 ++++----
 src/AKSRT/Forum/PlateMetaBox.php           |  8 ++++----
 src/AKSRT/Forum/TopicPay.php               |  6 +++---
 src/AKSRT/Messages/PrivateMessage.php      |  2 +-
 src/AKSRT/Payment/AfterSale.php            |  6 +++---
 src/AKSRT/Payment/ChargeCard.php           |  8 ++++----
 src/AKSRT/Payment/CreatorRevenue.php       |  2 +-
 src/AKSRT/Payment/Gateway.php              |  2 +-
 src/AKSRT/Payment/OrderRepositoryAdmin.php |  6 +++---
 src/AKSRT/Payment/Shipping.php             |  4 ++--
 src/AKSRT/Payment/ShippingPart1.php        |  4 ++--
 src/AKSRT/Settings/FacadeBulk.php          |  2 +-
 src/AKSRT/Shop/CartService.php             |  2 +-
 src/AKSRT/Shop/Part3.php                   |  2 +-
 src/AKSRT/Shop/ProductReview.php           |  2 +-
 src/AKSRT/Shop/ProductVariantsMetaBox.php  |  4 ++--
 src/AKSRT/Sms/SMSProviderAliyun.php        |  2 +-
 src/AKSRT/Sms/SMSProviderFactory.php       |  8 ++++----
 src/AKSRT/User/Badges.php                  |  2 +-
 src/AKSRT/User/BadgesAdmin.php             |  6 +++---
 src/AKSRT/User/Home.php                    |  4 ++--
 src/AKSRT/User/Metrics.php                 |  4 ++--
 40 files changed, 105 insertions(+), 105 deletions(-)

diff --git a/src/AKSRT/Admin/Native/PayMenus.php b/src/AKSRT/Admin/Native/PayMenus.php
index 7a834bba..7394a987 100644
--- a/src/AKSRT/Admin/Native/PayMenus.php
+++ b/src/AKSRT/Admin/Native/PayMenus.php
@@ -45,7 +45,7 @@ class PayMenus {
                 'slug'     => 'aksrt_orders',
                 'title'    => __('订单', 'aksrt'),
                 'callback' => static function (): void {
-                    if (class_exists('PayOrders')) {
+                    if (class_exists('AKSRT\Admin\Native\PayOrders')) {
                         PayOrders::get_instance()->render_orders_page();
                         return;
                     }
@@ -56,7 +56,7 @@ class PayMenus {
                 'slug'     => 'aksrt_pay_products',
                 'title'    => __('付费文章', 'aksrt'),
                 'callback' => static function (): void {
-                    if (class_exists('PayProducts')) {
+                    if (class_exists('AKSRT\\Admin\\Native\\PayProducts')) {
                         PayProducts::get_instance()->render_products_page();
                         return;
                     }
@@ -67,7 +67,7 @@ class PayMenus {
                 'slug'     => 'aksrt_download_logs',
                 'title'    => __('下载记录', 'aksrt'),
                 'callback' => static function (): void {
-                    if (class_exists('PayDownloadLogs')) {
+                    if (class_exists('AKSRT\\Admin\\Native\\PayDownloadLogs')) {
                         PayDownloadLogs::get_instance()->render_page();
                         return;
                     }
@@ -78,7 +78,7 @@ class PayMenus {
                 'slug'     => 'aksrt_shipping',
                 'title'    => __('发货及物流', 'aksrt'),
                 'callback' => static function (): void {
-                    if (class_exists('PayShipping')) {
+                    if (class_exists('AKSRT\\Admin\\Native\\PayShipping')) {
                         PayShipping::get_instance()->render_shipping_page();
                         return;
                     }
@@ -89,7 +89,7 @@ class PayMenus {
                 'slug'     => 'aksrt_after_sale',
                 'title'    => __('售后管理', 'aksrt'),
                 'callback' => static function (): void {
-                    if (class_exists('PayAfterSale')) {
+                    if (class_exists('AKSRT\\Admin\\Native\\PayAfterSale')) {
                         PayAfterSale::get_instance()->render_after_sale_page();
                         return;
                     }
@@ -100,7 +100,7 @@ class PayMenus {
                 'slug'     => 'aksrt_coupons',
                 'title'    => __('优惠码', 'aksrt'),
                 'callback' => static function (): void {
-                    if (class_exists('PayCoupons')) {
+                    if (class_exists('AKSRT\\Admin\\Native\\PayCoupons')) {
                         PayCoupons::get_instance()->render_page();
                         return;
                     }
@@ -111,7 +111,7 @@ class PayMenus {
                 'slug'     => 'aksrt_charge_cards',
                 'title'    => __('卡密管理', 'aksrt'),
                 'callback' => static function (): void {
-                    if (class_exists('PayChargeCards')) {
+                    if (class_exists('AKSRT\\Admin\\Native\\PayChargeCards')) {
                         PayChargeCards::get_instance()->render_charge_cards_page();
                         return;
                     }
@@ -122,7 +122,7 @@ class PayMenus {
                 'slug'     => 'aksrt_income',
                 'title'    => __('创作分成', 'aksrt'),
                 'callback' => static function (): void {
-                    if (class_exists('PayIncome')) {
+                    if (class_exists('AKSRT\\Admin\\Native\\PayIncome')) {
                         PayIncome::get_instance()->render_income_page();
                         return;
                     }
@@ -133,7 +133,7 @@ class PayMenus {
                 'slug'     => 'aksrt_rebate',
                 'title'    => __('推广返佣', 'aksrt'),
                 'callback' => static function (): void {
-                    if (class_exists('PayRebate')) {
+                    if (class_exists('AKSRT\\Admin\\Native\\PayRebate')) {
                         PayRebate::get_instance()->render_rebate_page();
                         return;
                     }
@@ -144,7 +144,7 @@ class PayMenus {
                 'slug'     => 'aksrt_withdraw',
                 'title'    => __('提现审核', 'aksrt'),
                 'callback' => static function (): void {
-                    if (class_exists('PayWithdrawals')) {
+                    if (class_exists('AKSRT\\Admin\\Native\\PayWithdrawals')) {
                         PayWithdrawals::get_instance()->render_withdrawals_page();
                         return;
                     }
diff --git a/src/AKSRT/Admin/Native/PayOrders.php b/src/AKSRT/Admin/Native/PayOrders.php
index f0323eac..338b1e62 100644
--- a/src/AKSRT/Admin/Native/PayOrders.php
+++ b/src/AKSRT/Admin/Native/PayOrders.php
@@ -512,14 +512,14 @@ class PayOrders {
     }
 
     private function shipping_status_options(bool $include_all = false): array {
-        if (class_exists('PayShipping')) {
+        if (class_exists('AKSRT\\Admin\\Native\\PayShipping')) {
             return PayShipping::get_instance()->shipping_status_options_public($include_all);
         }
         return $include_all ? ['' => __('全部状态', 'aksrt')] : [];
     }
 
     private function after_sale_type_options(bool $include_all = false): array {
-        if (class_exists('PayAfterSale')) {
+        if (class_exists('AKSRT\\Admin\\Native\\PayAfterSale')) {
             return PayAfterSale::get_instance()->after_sale_type_options_public($include_all);
         }
         return $include_all ? ['' => __('全部类型', 'aksrt')] : [
@@ -528,7 +528,7 @@ class PayOrders {
     }
 
     private function render_carrier_field(string $selected = ''): void {
-        if (class_exists('PayShipping')) {
+        if (class_exists('AKSRT\\Admin\\Native\\PayShipping')) {
             PayShipping::get_instance()->render_carrier_field_public($selected);
             return;
         }
diff --git a/src/AKSRT/Ai/AISEO.php b/src/AKSRT/Ai/AISEO.php
index e6909fa7..32ca6641 100644
--- a/src/AKSRT/Ai/AISEO.php
+++ b/src/AKSRT/Ai/AISEO.php
@@ -42,7 +42,7 @@ class AISEO {
             ];
         }
 
-        if (!class_exists('AI') || !class_exists('AIPrompt')) {
+        if (!class_exists('AKSRT\\Ai\\AI') || !class_exists('AKSRT\\Ai\\AIPrompt')) {
             return [
                 'success' => false,
                 'message' => __('AI 模块未加载', 'aksrt'),
@@ -115,7 +115,7 @@ class AISEO {
             return ['success' => false, 'message' => __('AI SEO 功能未启用', 'aksrt')];
         }
 
-        if (!class_exists('AI') || !class_exists('AIPrompt')) {
+        if (!class_exists('AKSRT\\Ai\\AI') || !class_exists('AKSRT\\Ai\\AIPrompt')) {
             return ['success' => false, 'message' => __('AI 模块未加载', 'aksrt')];
         }
 
diff --git a/src/AKSRT/Auth/EmailRollback.php b/src/AKSRT/Auth/EmailRollback.php
index 2aa4e31e..a84d0bc8 100644
--- a/src/AKSRT/Auth/EmailRollback.php
+++ b/src/AKSRT/Auth/EmailRollback.php
@@ -167,7 +167,7 @@ class EmailRollback {
         if (count($log) > 10) $log = array_slice($log, -10);
         update_user_meta($user_id, 'aksrt_email_verification_admin_log', $log);
 
-        if (class_exists('Service')) {
+        if (class_exists('AKSRT\\Auth\\Service')) {
             Service::log_event('admin.email_rollback', [
                 'uid' => $user_id,
                 'by'  => $by_admin_id ?: get_current_user_id(),
diff --git a/src/AKSRT/Auth/OAuth.php b/src/AKSRT/Auth/OAuth.php
index 71416298..44fd14f7 100644
--- a/src/AKSRT/Auth/OAuth.php
+++ b/src/AKSRT/Auth/OAuth.php
@@ -41,7 +41,7 @@ class OAuth {
      */
     public function get_auth_url(string $provider, string $action = 'login'): string {
         if (class_exists('\AKSRT\Settings\Settings') && \AKSRT\Settings\Settings::oauth_proxy_mode() === 'client') {
-            if (class_exists('OAuthProxyClient')) {
+            if (class_exists('AKSRT\\Auth\\OAuthProxyClient')) {
                 return OAuthProxyClient::get_instance()->get_proxy_auth_url($provider, $action);
             }
             return '';
diff --git a/src/AKSRT/Content/Download.php b/src/AKSRT/Content/Download.php
index 47e69485..855a43ed 100644
--- a/src/AKSRT/Content/Download.php
+++ b/src/AKSRT/Content/Download.php
@@ -118,7 +118,7 @@ class Download {
             : ((($meta['pay_modo'] ?? '0') === 'points') ? 'points' : '0');
         $display_price = is_array($priced) ? (float) ($priced['amount'] ?? 0) : (float) ($meta['price'] ?? 0);
 
-        $access = class_exists('Visibility')
+        $access = class_exists('AKSRT\\Content\\Visibility')
             ? Visibility::get_post_access_state($post, $uid)
             : [];
 
diff --git a/src/AKSRT/Content/DownloadState.php b/src/AKSRT/Content/DownloadState.php
index 81073c75..aec6bd26 100644
--- a/src/AKSRT/Content/DownloadState.php
+++ b/src/AKSRT/Content/DownloadState.php
@@ -63,7 +63,7 @@ class DownloadState {
             );
         }
 
-        $access = class_exists('Visibility')
+        $access = class_exists('AKSRT\\Content\\Visibility')
             ? Visibility::get_post_access_state($post_id, $user_id)
             : [];
         $priced = function_exists('aksrt_get_user_pay_price')
diff --git a/src/AKSRT/Core/PostMetaBox.php b/src/AKSRT/Core/PostMetaBox.php
index c7c938f6..7c406de2 100644
--- a/src/AKSRT/Core/PostMetaBox.php
+++ b/src/AKSRT/Core/PostMetaBox.php
@@ -489,7 +489,7 @@ class PostMetaBox {
      * Content-pay sales summary for posts list (zibll 销售数据 column parity).
      */
     private function render_sales_column(int $post_id): void {
-        if (!function_exists('aksrt_get_pay_meta') || !class_exists('DomainModel')) {
+        if (!function_exists('aksrt_get_pay_meta') || !class_exists('AKSRT\\Core\\DomainModel')) {
             echo '—';
             return;
         }
@@ -549,7 +549,7 @@ class PostMetaBox {
      * Dropdown filter for content pay_type on edit.php?post_type=post.
      */
     public function render_pay_type_filter(string $post_type): void {
-        if ($post_type !== 'post' || !class_exists('DomainModel')) {
+        if ($post_type !== 'post' || !class_exists('AKSRT\\Core\\DomainModel')) {
             return;
         }
         $current = isset($_GET['aksrt_pay_type']) ? sanitize_key((string) wp_unslash($_GET['aksrt_pay_type'])) : '';
@@ -582,7 +582,7 @@ class PostMetaBox {
             return;
         }
         $pay_type = sanitize_key((string) wp_unslash($_GET['aksrt_pay_type']));
-        if ($pay_type === '' || !class_exists('DomainModel')) {
+        if ($pay_type === '' || !class_exists('AKSRT\\Core\\DomainModel')) {
             return;
         }
         $pay_type = DomainModel::normalize_pay_type($pay_type);
@@ -663,7 +663,7 @@ class PostMetaBox {
                     <select name="aksrt_bulk_pay_type" class="aksrt-bulk-pay-type">
                         <option value="-1"><?php esc_html_e('— 不更改 —', 'aksrt'); ?></option>
                         <?php
-                        $pay_labels = class_exists('DomainModel') ? DomainModel::pay_type_labels() : [];
+                        $pay_labels = class_exists('AKSRT\\Core\\DomainModel') ? DomainModel::pay_type_labels() : [];
                         foreach ($pay_labels as $k => $lab) :
                             ?>
                             <option value="<?php echo esc_attr($k); ?>"><?php echo esc_html($lab); ?></option>
@@ -701,7 +701,7 @@ class PostMetaBox {
      * Only non-sentinel fields are written; omit to keep existing.
      */
     private function save_bulk_pay_fields(int $post_id): void {
-        if (!class_exists('DomainModel') || !function_exists('aksrt_get_pay_meta')) {
+        if (!class_exists('AKSRT\\Core\\DomainModel') || !function_exists('aksrt_get_pay_meta')) {
             return;
         }
         if (!current_user_can('edit_post', $post_id)) {
@@ -746,7 +746,7 @@ class PostMetaBox {
         update_post_meta($post_id, DomainModel::PAY_META_KEY, $meta);
         update_post_meta($post_id, DomainModel::PAY_TYPE_KEY, (string) ($meta['pay_type'] ?? DomainModel::PAY_TYPE_NO));
         update_post_meta($post_id, DomainModel::PAY_PRICE_KEY, (float) ($meta['price'] ?? 0));
-        if (class_exists('DomainModel') && method_exists('DomainModel', 'is_resource_pay_type')) {
+        if (class_exists('AKSRT\\Core\\DomainModel') && method_exists('AKSRT\\Core\\DomainModel', 'is_resource_pay_type')) {
             update_post_meta(
                 $post_id,
                 DomainModel::RESOURCE_MARKER_KEY,
diff --git a/src/AKSRT/Core/ResourceMetaBox.php b/src/AKSRT/Core/ResourceMetaBox.php
index c741bbbe..ab776da8 100644
--- a/src/AKSRT/Core/ResourceMetaBox.php
+++ b/src/AKSRT/Core/ResourceMetaBox.php
@@ -486,7 +486,7 @@ class ResourceMetaBox {
         $gallery = $this->parse_json_array($_POST['aksrt_pay_gallery'] ?? '');
 
         // 清洗下载源
-        if ($downloads !== null && class_exists('Setup') && method_exists('Setup', 'sanitize_downloads_meta')) {
+        if ($downloads !== null && class_exists('AKSRT\\Core\\Setup') && method_exists('AKSRT\\Core\\Setup', 'sanitize_downloads_meta')) {
             $downloads = Setup::sanitize_downloads_meta($downloads);
         }
 
diff --git a/src/AKSRT/Core/Shortcodes.php b/src/AKSRT/Core/Shortcodes.php
index 6f1f7d1a..65dde2e8 100644
--- a/src/AKSRT/Core/Shortcodes.php
+++ b/src/AKSRT/Core/Shortcodes.php
@@ -260,7 +260,7 @@ class Shortcodes {
      * [aksrt_archive] 文章归档
      */
     public function render_archive(array $atts = [], string $content = ''): string {
-        if (!class_exists('Templates')) {
+        if (!class_exists('AKSRT\\Core\\Templates')) {
             return '';
         }
         return Templates::get_instance()->render_archive_shortcode($atts, $content);
@@ -270,7 +270,7 @@ class Shortcodes {
      * [aksrt_profile] 个人资料卡
      */
     public function render_profile(array $atts = [], string $content = ''): string {
-        if (!class_exists('Templates')) {
+        if (!class_exists('AKSRT\\Core\\Templates')) {
             return '';
         }
         return Templates::get_instance()->render_profile_shortcode($atts, $content);
diff --git a/src/AKSRT/Credits/BalanceServiceCharge.php b/src/AKSRT/Credits/BalanceServiceCharge.php
index fb147718..ec6457f6 100644
--- a/src/AKSRT/Credits/BalanceServiceCharge.php
+++ b/src/AKSRT/Credits/BalanceServiceCharge.php
@@ -32,7 +32,7 @@ trait BalanceServiceCharge {
 
 		// Points purchase fulfill (zibll order_type=9).
 		if ($type === \AKSRT\Core\DomainModel::ORDER_PRODUCT_POINTS_BUY) {
-			if (!class_exists('Credits')) {
+			if (!class_exists('AKSRT\\Credits\\Credits')) {
 				return;
 			}
 			$note = json_decode((string) ($order['note'] ?? ''), true);
@@ -78,7 +78,7 @@ trait BalanceServiceCharge {
 		if ($type !== \AKSRT\Core\DomainModel::ORDER_PRODUCT_RECHARGE) {
 			return;
 		}
-		if (!class_exists('Balance')) {
+		if (!class_exists('AKSRT\\Credits\\Balance')) {
 			return;
 		}
 		$note = json_decode((string) ($order['note'] ?? ''), true);
@@ -140,7 +140,7 @@ trait BalanceServiceCharge {
 		return [
 			'enabled'       => !empty($cfg['enabled']),
 			'desc'          => (string) ($cfg['desc'] ?? ''),
-			'wallet'        => class_exists('Balance') ? Balance::balance($user_id) : 0.0,
+			'wallet'        => class_exists('AKSRT\\Credits\\Balance') ? Balance::balance($user_id) : 0.0,
 			'packages'      => $packages,
 			'custom_s'      => $custom_s,
 			'custom_limit'  => $custom_limit,
diff --git a/src/AKSRT/Credits/BalanceServicePoints.php b/src/AKSRT/Credits/BalanceServicePoints.php
index 1aab2a78..f0438c1b 100644
--- a/src/AKSRT/Credits/BalanceServicePoints.php
+++ b/src/AKSRT/Credits/BalanceServicePoints.php
@@ -38,13 +38,13 @@ trait BalanceServicePoints {
 				if ($id === '') {
 					continue;
 				}
-				if ($id === 'balance' && !(class_exists('Balance') && Balance::enabled())) {
+				if ($id === 'balance' && !(class_exists('AKSRT\\Credits\\Balance') && Balance::enabled())) {
 					continue;
 				}
 				$methods[] = is_array($m) ? $m : ['id' => $id, 'name' => $id];
 			}
 		}
-		if (class_exists('Balance') && Balance::enabled()) {
+		if (class_exists('AKSRT\\Credits\\Balance') && Balance::enabled()) {
 			$has_bal = false;
 			foreach ($methods as $m) {
 				if (($m['id'] ?? '') === 'balance') {
@@ -60,7 +60,7 @@ trait BalanceServicePoints {
 			'enabled' => $this->points_buy_enabled(),
 			'desc' => (string) ($all['pay_points_desc'] ?? ''),
 			'rate' => $rate,
-			'points' => class_exists('Credits') ? Credits::balance($user_id) : 0,
+			'points' => class_exists('AKSRT\\Credits\\Credits') ? Credits::balance($user_id) : 0,
 			'packages' => $packages,
 			'custom_s' => $custom_s,
 			'custom_limit' => $custom_limit,
diff --git a/src/AKSRT/Credits/BalanceServiceRest.php b/src/AKSRT/Credits/BalanceServiceRest.php
index 69e686c3..471b2ed6 100644
--- a/src/AKSRT/Credits/BalanceServiceRest.php
+++ b/src/AKSRT/Credits/BalanceServiceRest.php
@@ -93,7 +93,7 @@ trait BalanceServiceRest {
 	 * GET charge options (packages + methods + limits).
 	 */
 	public function rest_charge_options(\WP_REST_Request $request) {
-		if (!class_exists('Balance') || !Balance::enabled()) {
+		if (!class_exists('AKSRT\\Credits\\Balance') || !Balance::enabled()) {
 			return new \WP_Error('aksrt_balance_disabled', __('余额功能未启用', 'aksrt'), ['status' => 403]);
 		}
 		$user_id = get_current_user_id();
@@ -109,7 +109,7 @@ trait BalanceServiceRest {
 	 * POST create recharge order and initiate payment.
 	 */
 	public function rest_charge_create(\WP_REST_Request $request) {
-		if (!class_exists('Balance') || !Balance::enabled()) {
+		if (!class_exists('AKSRT\\Credits\\Balance') || !Balance::enabled()) {
 			return new \WP_Error('aksrt_balance_disabled', __('余额功能未启用', 'aksrt'), ['status' => 403]);
 		}
 		$user_id = get_current_user_id();
@@ -168,7 +168,7 @@ trait BalanceServiceRest {
 			if ($amount <= 0) {
 				return new \WP_Error('aksrt_transfer_amount', __('请输入有效金额', 'aksrt'), ['status' => 400]);
 			}
-			if (!class_exists('Balance')) {
+			if (!class_exists('AKSRT\\Credits\\Balance')) {
 				return new \WP_Error('aksrt_balance_unavailable', __('余额系统不可用', 'aksrt'), ['status' => 500]);
 			}
 			$from_bal = Balance::balance($from_id);
@@ -219,7 +219,7 @@ trait BalanceServiceRest {
 		if ($amount <= 0) {
 			return new \WP_Error('aksrt_transfer_amount', __('请输入有效积分', 'aksrt'), ['status' => 400]);
 		}
-		if (!class_exists('Credits')) {
+		if (!class_exists('AKSRT\\Credits\\Credits')) {
 			return new \WP_Error('aksrt_credits_unavailable', __('积分系统不可用', 'aksrt'), ['status' => 500]);
 		}
 		$fee_rate = max(0, min(50, (int) (\AKSRT\Settings\Settings::get_all()['points_service_charge'] ?? 0)));
@@ -286,14 +286,14 @@ trait BalanceServiceRest {
 	 * Exchange points → cash wallet (pay_balance_exchange_*).
 	 */
 	public function rest_exchange_from_credits(\WP_REST_Request $request) {
-		if (!class_exists('Balance') || !Balance::enabled()) {
+		if (!class_exists('AKSRT\\Credits\\Balance') || !Balance::enabled()) {
 			return new \WP_Error('aksrt_balance_disabled', __('余额功能未启用', 'aksrt'), ['status' => 403]);
 		}
 		$cfg = class_exists('\AKSRT\Settings\Settings') ? \AKSRT\Settings\Settings::get_payment_recharge_settings() : [];
 		if (empty($cfg['exchange']['enabled'])) {
 			return new \WP_Error('aksrt_exchange_closed', __('积分兑换余额未开启', 'aksrt'), ['status' => 403]);
 		}
-		if (!class_exists('Credits') || !\AKSRT\Settings\Settings::credits_enabled()) {
+		if (!class_exists('AKSRT\\Credits\\Credits') || !\AKSRT\Settings\Settings::credits_enabled()) {
 			return new \WP_Error('aksrt_credits_disabled', __('积分功能未启用', 'aksrt'), ['status' => 403]);
 		}
 		$params = $request->get_json_params();
@@ -380,7 +380,7 @@ trait BalanceServiceRest {
 
 
 	public function rest_balance_withdraw(\WP_REST_Request $request) {
-		if (!class_exists('Balance') || !Balance::enabled()) {
+		if (!class_exists('AKSRT\\Credits\\Balance') || !Balance::enabled()) {
 			return new \WP_Error('aksrt_balance_disabled', __('余额功能未启用', 'aksrt'), ['status' => 403]);
 		}
 		$settings = class_exists('\AKSRT\Settings\Settings') ? \AKSRT\Settings\Settings::get_all() : [];
diff --git a/src/AKSRT/Credits/Earn.php b/src/AKSRT/Credits/Earn.php
index 94453875..61115c02 100644
--- a/src/AKSRT/Credits/Earn.php
+++ b/src/AKSRT/Credits/Earn.php
@@ -39,7 +39,7 @@ class Earn {
 	}
 
 	public function on_user_register(int $user_id): void {
-		if (!class_exists('PointsFree')) {
+		if (!class_exists('AKSRT\\Credits\\PointsFree')) {
 			return;
 		}
 		PointsFree::grant($user_id, 'sign_up', 0, ['type' => 'user', 'id' => $user_id]);
@@ -54,7 +54,7 @@ class Earn {
 	public function on_wp_login($user_login, $user = null): void {
 		unset($user_login);
 		$user_id = $user instanceof \WP_User ? (int) $user->ID : 0;
-		if ($user_id <= 0 || !class_exists('PointsFree')) {
+		if ($user_id <= 0 || !class_exists('AKSRT\\Credits\\PointsFree')) {
 			return;
 		}
 		$today = (new \DateTimeImmutable('today', wp_timezone()))->format('Y-m-d');
@@ -81,7 +81,7 @@ class Earn {
 			return;
 		}
 		$user_id = (int) $post->post_author;
-		if ($user_id <= 0 || !class_exists('PointsFree')) {
+		if ($user_id <= 0 || !class_exists('AKSRT\\Credits\\PointsFree')) {
 			return;
 		}
 		if (get_post_meta($post->ID, 'aksrt_credit_post_rewarded', true)) {
@@ -118,7 +118,7 @@ class Earn {
 
 	private function reward_comment(\WP_Comment $comment): void {
 		$user_id = (int) $comment->user_id;
-		if ($user_id <= 0 || !class_exists('PointsFree')) {
+		if ($user_id <= 0 || !class_exists('AKSRT\\Credits\\PointsFree')) {
 			return;
 		}
 		if (get_comment_meta($comment->comment_ID, 'aksrt_credit_rewarded', true)) {
@@ -150,7 +150,7 @@ class Earn {
 	 * @param bool $active
 	 */
 	public function on_post_liked(int $post_id, int $actor_id, bool $active): void {
-		if (!$active || $post_id <= 0 || !class_exists('PointsFree')) {
+		if (!$active || $post_id <= 0 || !class_exists('AKSRT\\Credits\\PointsFree')) {
 			return;
 		}
 		$post = get_post($post_id);
@@ -165,7 +165,7 @@ class Earn {
 	}
 
 	public function on_post_favorited(int $post_id, int $actor_id, bool $active): void {
-		if (!$active || $post_id <= 0 || !class_exists('PointsFree')) {
+		if (!$active || $post_id <= 0 || !class_exists('AKSRT\\Credits\\PointsFree')) {
 			return;
 		}
 		$post = get_post($post_id);
@@ -180,7 +180,7 @@ class Earn {
 	}
 
 	public function on_comment_liked(int $comment_id, int $actor_id, bool $active): void {
-		if (!$active || $comment_id <= 0 || !class_exists('PointsFree')) {
+		if (!$active || $comment_id <= 0 || !class_exists('AKSRT\\Credits\\PointsFree')) {
 			return;
 		}
 		$comment = get_comment($comment_id);
@@ -195,14 +195,14 @@ class Earn {
 	}
 
 	public function on_user_followed(int $follower_id, int $following_id): void {
-		if ($following_id <= 0 || $follower_id === $following_id || !class_exists('PointsFree')) {
+		if ($following_id <= 0 || $follower_id === $following_id || !class_exists('AKSRT\\Credits\\PointsFree')) {
 			return;
 		}
 		PointsFree::grant($following_id, 'followed', 0, ['type' => 'user', 'id' => $follower_id]);
 	}
 
 	public function on_forum_topic_created(int $user_id, int $post_id): void {
-		if ($user_id <= 0 || !class_exists('PointsFree')) {
+		if ($user_id <= 0 || !class_exists('AKSRT\\Credits\\PointsFree')) {
 			return;
 		}
 		PointsFree::grant($user_id, 'bbs_posts_new', 0, ['type' => 'post', 'id' => $post_id]);
@@ -222,7 +222,7 @@ class Earn {
 			return;
 		}
 		$user_id = (int) $comment->user_id;
-		if ($user_id <= 0 || !class_exists('PointsFree')) {
+		if ($user_id <= 0 || !class_exists('AKSRT\\Credits\\PointsFree')) {
 			return;
 		}
 		if (get_comment_meta($comment_id, 'aksrt_credit_forum_reply', true)) {
diff --git a/src/AKSRT/Credits/Invite.php b/src/AKSRT/Credits/Invite.php
index 53e2f400..9fe02d91 100644
--- a/src/AKSRT/Credits/Invite.php
+++ b/src/AKSRT/Credits/Invite.php
@@ -188,7 +188,7 @@ class Invite {
 
     /** 双向发放奖励 */
     private function reward_pair(int $inviter_id, int $invitee_id): void {
-        if (!class_exists('Credits') || !class_exists('\AKSRT\Settings\Settings')) return;
+        if (!class_exists('AKSRT\\Credits\\Credits') || !class_exists('\AKSRT\Settings\Settings')) return;
 
         $invite_cfg = \AKSRT\Settings\Settings::get_invite_reward_settings();
         if (empty($invite_cfg['enabled'])) return;
diff --git a/src/AKSRT/Credits/PointsFree.php b/src/AKSRT/Credits/PointsFree.php
index 71b9748d..a36df371 100644
--- a/src/AKSRT/Credits/PointsFree.php
+++ b/src/AKSRT/Credits/PointsFree.php
@@ -82,7 +82,7 @@ class PointsFree {
 	 * Whether free points system can run (credits enabled).
 	 */
 	public static function enabled(): bool {
-		return class_exists('\AKSRT\Settings\Settings') && \AKSRT\Settings\Settings::credits_enabled() && class_exists('Credits');
+		return class_exists('\AKSRT\Settings\Settings') && \AKSRT\Settings\Settings::credits_enabled() && class_exists('AKSRT\\Credits\\Credits');
 	}
 
 	/**
diff --git a/src/AKSRT/Credits/Signin.php b/src/AKSRT/Credits/Signin.php
index 58cd1a86..ccb28e45 100644
--- a/src/AKSRT/Credits/Signin.php
+++ b/src/AKSRT/Credits/Signin.php
@@ -127,16 +127,16 @@ class Signin {
         do_action('aksrt_user_signed_in', $user_id);
 
         if ($reward > 0) {
-            if (class_exists('PointsFree')) {
+            if (class_exists('AKSRT\\Credits\\PointsFree')) {
                 $granted = PointsFree::grant_amount($user_id, $reward, 'sign_in', ['type' => 'user', 'id' => $user_id]);
                 if (is_wp_error($granted)) {
-                    if (class_exists('Credits')) {
+                    if (class_exists('AKSRT\\Credits\\Credits')) {
                         Credits::add($user_id, $reward, 'signin', ['type' => 'user', 'id' => $user_id]);
                     }
                 } else {
                     $reward = (int) $granted;
                 }
-            } elseif (class_exists('Credits')) {
+            } elseif (class_exists('AKSRT\\Credits\\Credits')) {
                 Credits::add($user_id, $reward, 'signin', ['type' => 'user', 'id' => $user_id]);
             }
         }
@@ -145,7 +145,7 @@ class Signin {
             'success' => true,
             'streak'  => $new_streak,
             'reward'  => $reward,
-            'balance' => class_exists('Credits') ? Credits::balance($user_id) : 0,
+            'balance' => class_exists('AKSRT\\Credits\\Credits') ? Credits::balance($user_id) : 0,
         ], 200);
     }
 
diff --git a/src/AKSRT/Forum/Forum.php b/src/AKSRT/Forum/Forum.php
index 70fc8e05..ce18f260 100644
--- a/src/AKSRT/Forum/Forum.php
+++ b/src/AKSRT/Forum/Forum.php
@@ -89,7 +89,7 @@ class Forum {
     private function draft_service(): DraftService {
         if (!$this->draft_svc) {
             // Draft service is loaded by bootstrap before this class.
-            if (!class_exists('DraftService', false)) {
+            if (!class_exists('AKSRT\\Forum\\DraftService', false)) {
                 require_once __DIR__ . '/class-aksrt-forum-draft-service.php';
             }
             $this->draft_svc = new DraftService($this);
diff --git a/src/AKSRT/Forum/PlateFollowPay.php b/src/AKSRT/Forum/PlateFollowPay.php
index b9b57093..dd4a3ee0 100644
--- a/src/AKSRT/Forum/PlateFollowPay.php
+++ b/src/AKSRT/Forum/PlateFollowPay.php
@@ -572,7 +572,7 @@ class PlateFollowPay {
     }
 
     private function is_follow_pay_enabled(int $plate_id): bool {
-        if (class_exists('Forum') && method_exists('Forum', 'is_plate_follow_pay_enabled')) {
+        if (class_exists('AKSRT\\Forum\\Forum') && method_exists('AKSRT\\Forum\\Forum', 'is_plate_follow_pay_enabled')) {
             return (bool) Forum::get_instance()->is_plate_follow_pay_enabled($plate_id);
         }
         return (int) get_post_meta($plate_id, '_aksrt_follow_pay', true) === 1;
@@ -582,7 +582,7 @@ class PlateFollowPay {
      * @return array{amount:float,modo:string,is_vip_price:bool,is_free:bool,label:string,base:float,vip_level:int}
      */
     private function resolve_price(int $plate_id, int $user_id): array {
-        if (class_exists('Forum') && method_exists('Forum', 'resolve_plate_follow_pay_price')) {
+        if (class_exists('AKSRT\\Forum\\Forum') && method_exists('AKSRT\\Forum\\Forum', 'resolve_plate_follow_pay_price')) {
             return Forum::get_instance()->resolve_plate_follow_pay_price($plate_id, $user_id);
         }
         return [
@@ -604,7 +604,7 @@ class PlateFollowPay {
             return function_exists('aksrt_guest_has_plate_follow_access')
                 && aksrt_guest_has_plate_follow_access($plate_id);
         }
-        if (class_exists('Forum') && method_exists('Forum', 'is_user_following_plate')) {
+        if (class_exists('AKSRT\\Forum\\Forum') && method_exists('AKSRT\\Forum\\Forum', 'is_user_following_plate')) {
             return (bool) Forum::get_instance()->is_user_following_plate($user_id, $plate_id);
         }
         $follow_list = get_user_meta($user_id, 'aksrt_follow_plate', true);
@@ -615,7 +615,7 @@ class PlateFollowPay {
     }
 
     private function mark_followed(int $user_id, int $plate_id): void {
-        if (class_exists('Forum') && method_exists('Forum', 'mark_plate_followed')) {
+        if (class_exists('AKSRT\\Forum\\Forum') && method_exists('AKSRT\\Forum\\Forum', 'mark_plate_followed')) {
             Forum::get_instance()->mark_plate_followed($user_id, $plate_id);
             return;
         }
diff --git a/src/AKSRT/Forum/PlateMetaBox.php b/src/AKSRT/Forum/PlateMetaBox.php
index 5630d7a6..b673ca57 100644
--- a/src/AKSRT/Forum/PlateMetaBox.php
+++ b/src/AKSRT/Forum/PlateMetaBox.php
@@ -59,7 +59,7 @@ class PlateMetaBox {
         $roles_map     = [];
         $applications  = [];
 
-        if (class_exists('Forum')) {
+        if (class_exists('AKSRT\\Forum\\Forum')) {
             $forum         = Forum::get_instance();
             $moderator_ids = $forum->get_plate_moderators($plate_id);
             $roles_map     = $forum->get_moderator_roles($plate_id);
@@ -292,7 +292,7 @@ class PlateMetaBox {
             if ($status === 'pending') {
                 return true;
             }
-            return class_exists('Forum') && $status === Forum::APPLICATION_PENDING;
+            return class_exists('AKSRT\\Forum\\Forum') && $status === Forum::APPLICATION_PENDING;
         }));
         if (!$pending) {
             echo '<p class="description">' . esc_html__('暂无待处理申请。', 'aksrt') . '</p>';
@@ -495,7 +495,7 @@ class PlateMetaBox {
             $desired[$add_id] = $add_role;
         }
 
-        if (class_exists('Forum')) {
+        if (class_exists('AKSRT\\Forum\\Forum')) {
             $forum   = Forum::get_instance();
             $current = $forum->get_plate_moderators($post_id);
             foreach ($current as $uid) {
@@ -527,7 +527,7 @@ class PlateMetaBox {
         $actions = isset($_POST['aksrt_plate_app']) && is_array($_POST['aksrt_plate_app'])
             ? wp_unslash($_POST['aksrt_plate_app'])
             : [];
-        if (!$actions || !class_exists('Forum')) {
+        if (!$actions || !class_exists('AKSRT\\Forum\\Forum')) {
             return;
         }
 
diff --git a/src/AKSRT/Forum/TopicPay.php b/src/AKSRT/Forum/TopicPay.php
index eeeacaae..f1d9da09 100644
--- a/src/AKSRT/Forum/TopicPay.php
+++ b/src/AKSRT/Forum/TopicPay.php
@@ -576,7 +576,7 @@ class TopicPay {
      * @return array{amount:float,is_vip_price:bool,is_free:bool,label:string,base:float,vip_set:bool,vip_level:int}
      */
     private function resolve_price(int $topic_id, int $user_id): array {
-        if (class_exists('Forum')) {
+        if (class_exists('AKSRT\\Forum\\Forum')) {
             return Forum::get_instance()->resolve_topic_pay_price($topic_id, $user_id);
         }
         return [
@@ -594,7 +594,7 @@ class TopicPay {
         if ($user_id <= 0) {
             return function_exists('aksrt_guest_has_paid_access') && aksrt_guest_has_paid_access($topic_id);
         }
-        if (class_exists('Forum')) {
+        if (class_exists('AKSRT\\Forum\\Forum')) {
             return Forum::get_instance()->has_user_paid_topic($user_id, $topic_id);
         }
         if (class_exists('\AKSRT\Payment\Order')) {
@@ -608,7 +608,7 @@ class TopicPay {
     }
 
     private function mark_unlocked(int $user_id, int $topic_id): void {
-        if (class_exists('Forum') && method_exists('Forum', 'mark_topic_unlocked')) {
+        if (class_exists('AKSRT\\Forum\\Forum') && method_exists('AKSRT\\Forum\\Forum', 'mark_topic_unlocked')) {
             Forum::get_instance()->mark_topic_unlocked($user_id, $topic_id);
             return;
         }
diff --git a/src/AKSRT/Messages/PrivateMessage.php b/src/AKSRT/Messages/PrivateMessage.php
index 481b014c..8704a9ad 100644
--- a/src/AKSRT/Messages/PrivateMessage.php
+++ b/src/AKSRT/Messages/PrivateMessage.php
@@ -184,7 +184,7 @@ class PrivateMessage {
 
         // Create notification for the recipient
         $recipient_id = $is_a ? (int) $conv['user_b'] : (int) $conv['user_a'];
-        if (class_exists('Message')) {
+        if (class_exists('AKSRT\\Messages\\Message')) {
             $sender_name = '';
             $sender_user = get_userdata($sender_id);
             if ($sender_user) {
diff --git a/src/AKSRT/Payment/AfterSale.php b/src/AKSRT/Payment/AfterSale.php
index 69866f21..cb2121ec 100644
--- a/src/AKSRT/Payment/AfterSale.php
+++ b/src/AKSRT/Payment/AfterSale.php
@@ -137,7 +137,7 @@ class AfterSale {
         $items = $wpdb->get_results($wpdb->prepare($sql, $params), ARRAY_A);
         $items = array_map([$this, 'decorate_record'], (array) $items);
 
-        if ($include_order_context && !empty($items) && class_exists('OrderRepository')) {
+        if ($include_order_context && !empty($items) && class_exists('AKSRT\\Payment\\OrderRepository')) {
             $contexts = OrderRepository::get_instance()->get_admin_order_context_map(array_column($items, 'order_number'));
             foreach ($items as &$item) {
                 $item['order_context'] = $contexts[(string) ($item['order_number'] ?? '')] ?? [];
@@ -174,7 +174,7 @@ class AfterSale {
             return null;
         }
 
-        $record['order_context'] = class_exists('OrderRepository')
+        $record['order_context'] = class_exists('AKSRT\\Payment\\OrderRepository')
             ? OrderRepository::get_instance()->get_admin_order_context((string) ($record['order_number'] ?? ''))
             : [];
 
@@ -561,7 +561,7 @@ class AfterSale {
     }
 
     private function sync_order_status(array $record, string $new_status, string $note = ''): void {
-        if (!class_exists('OrderRepository') || !class_exists('Order')) {
+        if (!class_exists('AKSRT\\Payment\\OrderRepository') || !class_exists('AKSRT\\Payment\\Order')) {
             return;
         }
 
diff --git a/src/AKSRT/Payment/ChargeCard.php b/src/AKSRT/Payment/ChargeCard.php
index af2fdd4e..1f2ee0c0 100644
--- a/src/AKSRT/Payment/ChargeCard.php
+++ b/src/AKSRT/Payment/ChargeCard.php
@@ -330,7 +330,7 @@ class ChargeCard {
 
         if (!$this->mark_used_cas($card_id, $user_id, $order_number)) {
             // Race lost.
-            if (class_exists('Order')) {
+            if (class_exists('AKSRT\\Payment\\Order')) {
                 Order::get_instance()->update_status($order_number, Order::STATUS_CANCELLED, [
                     'note' => __('卡密已被使用，订单取消', 'aksrt'),
                 ]);
@@ -343,7 +343,7 @@ class ChargeCard {
             return $fulfill;
         }
 
-        if (class_exists('Order')) {
+        if (class_exists('AKSRT\\Payment\\Order')) {
             Order::get_instance()->update_status($order_number, Order::STATUS_PAID, [
                 'payment_method'         => 'card_pass',
                 'payment_transaction_id' => 'card_pass_' . $card_id,
@@ -502,7 +502,7 @@ class ChargeCard {
      * @param array<string,mixed> $meta
      */
     private function create_redeem_order(int $user_id, string $type, array $meta, int $card_id, string $password): string {
-        if (!class_exists('OrderRepository') || !class_exists('\AKSRT\Core\DomainModel')) {
+        if (!class_exists('AKSRT\\Payment\\OrderRepository') || !class_exists('\AKSRT\Core\DomainModel')) {
             return 'CARD' . $card_id . '_' . time();
         }
 
@@ -536,7 +536,7 @@ class ChargeCard {
             'product_id'     => $product_id,
             'amount'         => $amount,
             'currency'       => $currency,
-            'status'         => class_exists('Order') ? Order::STATUS_PENDING : 'pending',
+            'status'         => class_exists('AKSRT\\Payment\\Order') ? Order::STATUS_PENDING : 'pending',
             'payment_method' => 'card_pass',
             'note'           => is_string($note) ? $note : '',
             'expires_at'     => gmdate('Y-m-d H:i:s', time() + 30 * MINUTE_IN_SECONDS),
diff --git a/src/AKSRT/Payment/CreatorRevenue.php b/src/AKSRT/Payment/CreatorRevenue.php
index 2c1afa6a..2b8b6d78 100644
--- a/src/AKSRT/Payment/CreatorRevenue.php
+++ b/src/AKSRT/Payment/CreatorRevenue.php
@@ -26,7 +26,7 @@ class CreatorRevenue {
          * Whether creator revenue settlement is enabled.
          */
         private function is_enabled(): bool {
-            if (!class_exists('Revenue') || !class_exists('\AKSRT\Settings\Settings')) {
+            if (!class_exists('AKSRT\\Payment\\Revenue') || !class_exists('\AKSRT\Settings\Settings')) {
                 return false;
             }
             $settings = \AKSRT\Settings\Settings::get_payment_revenue_settings();
diff --git a/src/AKSRT/Payment/Gateway.php b/src/AKSRT/Payment/Gateway.php
index a95eb20a..f956e7a6 100644
--- a/src/AKSRT/Payment/Gateway.php
+++ b/src/AKSRT/Payment/Gateway.php
@@ -212,7 +212,7 @@ class Gateway {
      */
     public function complete_order(string $gateway_id, array $verify): bool {
         $order_number = sanitize_text_field((string) ($verify['order_number'] ?? ''));
-        if ($order_number === '' || !class_exists('OrderRepository')) {
+        if ($order_number === '' || !class_exists('AKSRT\\Payment\\OrderRepository')) {
             return false;
         }
 
diff --git a/src/AKSRT/Payment/OrderRepositoryAdmin.php b/src/AKSRT/Payment/OrderRepositoryAdmin.php
index e1bb51ae..ef590752 100644
--- a/src/AKSRT/Payment/OrderRepositoryAdmin.php
+++ b/src/AKSRT/Payment/OrderRepositoryAdmin.php
@@ -63,10 +63,10 @@ trait OrderRepositoryAdmin {
         }
 
         $resolved_order_numbers = array_keys($orders);
-        $shipping_map = class_exists('Shipping')
+        $shipping_map = class_exists('AKSRT\\Payment\\Shipping')
             ? Shipping::get_instance()->get_summary_map($resolved_order_numbers)
             : [];
-        $after_sale_map = class_exists('AfterSale')
+        $after_sale_map = class_exists('AKSRT\\Payment\\AfterSale')
             ? AfterSale::get_instance()->get_summary_map($resolved_order_numbers)
             : [];
 
@@ -509,7 +509,7 @@ trait OrderRepositoryAdmin {
             'summary' => [
                 'order_number' => (string) ($order['order_number'] ?? ''),
                 'status' => $status,
-                'status_label' => class_exists('Order') ? (Order::get_valid_statuses()[$status] ?? $status) : $status,
+                'status_label' => class_exists('AKSRT\\Payment\\Order') ? (Order::get_valid_statuses()[$status] ?? $status) : $status,
                 'amount' => $amount,
                 'currency_symbol' => '¥',
                 'created_at' => (string) ($order['created_at'] ?? ''),
diff --git a/src/AKSRT/Payment/Shipping.php b/src/AKSRT/Payment/Shipping.php
index e1a66372..f35665c3 100644
--- a/src/AKSRT/Payment/Shipping.php
+++ b/src/AKSRT/Payment/Shipping.php
@@ -123,7 +123,7 @@ class Shipping {
         $items = $wpdb->get_results($wpdb->prepare($sql, $params), ARRAY_A);
         $items = array_map([$this, 'decorate_record'], (array) $items);
 
-        if ($include_order_context && !empty($items) && class_exists('OrderRepository')) {
+        if ($include_order_context && !empty($items) && class_exists('AKSRT\\Payment\\OrderRepository')) {
             $contexts = OrderRepository::get_instance()->get_admin_order_context_map(array_column($items, 'order_number'));
             foreach ($items as &$item) {
                 $item['order_context'] = $contexts[(string) ($item['order_number'] ?? '')] ?? [];
@@ -172,7 +172,7 @@ class Shipping {
             return null;
         }
 
-        $record['order_context'] = class_exists('OrderRepository')
+        $record['order_context'] = class_exists('AKSRT\\Payment\\OrderRepository')
             ? OrderRepository::get_instance()->get_admin_order_context((string) ($record['order_number'] ?? ''))
             : [];
 
diff --git a/src/AKSRT/Payment/ShippingPart1.php b/src/AKSRT/Payment/ShippingPart1.php
index 1bce180a..30903f27 100644
--- a/src/AKSRT/Payment/ShippingPart1.php
+++ b/src/AKSRT/Payment/ShippingPart1.php
@@ -10,7 +10,7 @@ defined('ABSPATH') || exit;
 trait ShippingPart1 {
 
     private function send_shipping_notification(string $order_number, string $carrier, string $tracking_no, string $note = ''): void {
-        if (!class_exists('OrderRepository')) {
+        if (!class_exists('AKSRT\\Payment\\OrderRepository')) {
             return;
         }
 
@@ -117,7 +117,7 @@ trait ShippingPart1 {
     }
 
     private function sync_order_status(string $order_number, string $shipping_status, string $note = ''): void {
-        if ($order_number === '' || !class_exists('OrderRepository') || !class_exists('Order')) {
+        if ($order_number === '' || !class_exists('AKSRT\\Payment\\OrderRepository') || !class_exists('AKSRT\\Payment\\Order')) {
             return;
         }
 
diff --git a/src/AKSRT/Settings/FacadeBulk.php b/src/AKSRT/Settings/FacadeBulk.php
index 2e29c627..58a91bb6 100644
--- a/src/AKSRT/Settings/FacadeBulk.php
+++ b/src/AKSRT/Settings/FacadeBulk.php
@@ -275,7 +275,7 @@ trait FacadeBulk {
      */
     public static function get_post_page_settings(): array {
         // Canonical assembly lives in the post-display helper (related style/source split, aliases).
-        if (class_exists('PostDisplay')) {
+        if (class_exists('AKSRT\\Settings\\PostDisplay')) {
             return PostDisplay::get_post_page_settings();
         }
 
diff --git a/src/AKSRT/Shop/CartService.php b/src/AKSRT/Shop/CartService.php
index a77a1458..92877445 100644
--- a/src/AKSRT/Shop/CartService.php
+++ b/src/AKSRT/Shop/CartService.php
@@ -159,7 +159,7 @@ class CartService {
             $guest = get_post_meta($product_id, '_aksrt_guest_buy', true);
             if ($guest === '0' || $guest === '') {
                 // Fall back to inheritance chain via TermMeta
-                if (class_exists('TermMeta')) {
+                if (class_exists('AKSRT\Shop\TermMeta')) {
                     $resolved = TermMeta::resolve_inheritance($product_id, 'guest_buy');
                     if (empty($resolved)) {
                         return 'login_required';
diff --git a/src/AKSRT/Shop/Part3.php b/src/AKSRT/Shop/Part3.php
index fab2da22..ef7f2010 100644
--- a/src/AKSRT/Shop/Part3.php
+++ b/src/AKSRT/Shop/Part3.php
@@ -301,7 +301,7 @@ trait Part3 {
             if ($pid <= 0 || $pay_price <= 0) continue;
 
             $rebate_rate = (float) get_post_meta($pid, '_aksrt_rebate_rate', true);
-            if ($rebate_rate <= 0 && class_exists('TermMeta')) {
+            if ($rebate_rate <= 0 && class_exists('AKSRT\Shop\TermMeta')) {
                 $resolved = TermMeta::resolve_inheritance($pid, 'rebate');
                 $rebate_rate = (float) ($resolved ?: 0);
             }
diff --git a/src/AKSRT/Shop/ProductReview.php b/src/AKSRT/Shop/ProductReview.php
index b7be58b1..6468e667 100644
--- a/src/AKSRT/Shop/ProductReview.php
+++ b/src/AKSRT/Shop/ProductReview.php
@@ -275,7 +275,7 @@ class ProductReview {
             $order_number = (string) ($order['order_number'] ?? '');
             if ($user_id <= 0 || $order_number === '') continue;
 
-            $items = class_exists('Shop')
+            $items = class_exists('AKSRT\\Shop\\Shop')
                 ? Shop::get_instance()->get_order_items($order_number)
                 : [];
 
diff --git a/src/AKSRT/Shop/ProductVariantsMetaBox.php b/src/AKSRT/Shop/ProductVariantsMetaBox.php
index 09b55d77..5d39c468 100644
--- a/src/AKSRT/Shop/ProductVariantsMetaBox.php
+++ b/src/AKSRT/Shop/ProductVariantsMetaBox.php
@@ -41,7 +41,7 @@ class ProductVariantsMetaBox {
         wp_nonce_field('aksrt_product_variants_save', 'aksrt_product_variants_nonce');
 
         $variants = [];
-        if (class_exists('Shop')) {
+        if (class_exists('AKSRT\\Shop\\Shop')) {
             $variants = Shop::get_instance()->get_variants((int) $post->ID);
         }
 
@@ -138,7 +138,7 @@ class ProductVariantsMetaBox {
         if ($post->post_type !== 'aksrt_product' || !current_user_can('edit_post', $post_id)) {
             return;
         }
-        if (!class_exists('Shop')) {
+        if (!class_exists('AKSRT\\Shop\\Shop')) {
             return;
         }
 
diff --git a/src/AKSRT/Sms/SMSProviderAliyun.php b/src/AKSRT/Sms/SMSProviderAliyun.php
index 251cc211..0e5e421d 100644
--- a/src/AKSRT/Sms/SMSProviderAliyun.php
+++ b/src/AKSRT/Sms/SMSProviderAliyun.php
@@ -82,7 +82,7 @@ class SMSProviderAliyun implements ProviderInterface {
      * @return array|\WP_Error
      */
     private function request(string $access_key, string $access_secret, string $region_id, array $biz_params) {
-        if (!class_exists('SMSSignatureHelper')) {
+        if (!class_exists('AKSRT\\Sms\\SMSSignatureHelper')) {
             return new \WP_Error('sms_helper_missing', '签名助手类未加载');
         }
 
diff --git a/src/AKSRT/Sms/SMSProviderFactory.php b/src/AKSRT/Sms/SMSProviderFactory.php
index f2f34ef0..06985085 100644
--- a/src/AKSRT/Sms/SMSProviderFactory.php
+++ b/src/AKSRT/Sms/SMSProviderFactory.php
@@ -52,13 +52,13 @@ class SMSProviderFactory {
     private static function create(string $key): ?ProviderInterface {
         switch ($key) {
             case 'aliyun':
-                return class_exists('SMSProviderAliyun') ? new SMSProviderAliyun() : null;
+                return class_exists('AKSRT\\Sms\\SMSProviderAliyun') ? new SMSProviderAliyun() : null;
             case 'tencent':
-                return class_exists('SMSProviderTencent') ? new SMSProviderTencent() : null;
+                return class_exists('AKSRT\\Sms\\SMSProviderTencent') ? new SMSProviderTencent() : null;
             case 'huawei':
-                return class_exists('SMSProviderHuawei') ? new SMSProviderHuawei() : null;
+                return class_exists('AKSRT\\Sms\\SMSProviderHuawei') ? new SMSProviderHuawei() : null;
             case 'custom':
-                return class_exists('SMSProviderCustom') ? new SMSProviderCustom() : null;
+                return class_exists('AKSRT\\Sms\\SMSProviderCustom') ? new SMSProviderCustom() : null;
             default:
                 return null;
         }
diff --git a/src/AKSRT/User/Badges.php b/src/AKSRT/User/Badges.php
index 26d214d5..95c8f3d2 100644
--- a/src/AKSRT/User/Badges.php
+++ b/src/AKSRT/User/Badges.php
@@ -473,7 +473,7 @@ class Badges {
 				return (float) $counts;
 
 			case 'followed':
-				if (class_exists('Follow')) {
+				if (class_exists('AKSRT\\User\\Follow')) {
 					return (float) Follow::get_instance()->get_follower_count($user_id);
 				}
 				return 0.0;
diff --git a/src/AKSRT/User/BadgesAdmin.php b/src/AKSRT/User/BadgesAdmin.php
index 8d7d8503..3f6e97ca 100644
--- a/src/AKSRT/User/BadgesAdmin.php
+++ b/src/AKSRT/User/BadgesAdmin.php
@@ -31,11 +31,11 @@ class BadgesAdmin {
 	}
 
 	private function can_manage(): bool {
-		return class_exists('Badges') && Badges::can_manually_set(get_current_user_id());
+		return class_exists('AKSRT\\User\\Badges') && Badges::can_manually_set(get_current_user_id());
 	}
 
 	public function render_section(\WP_User $user): void {
-		if (!class_exists('Badges') || !Badges::enabled()) {
+		if (!class_exists('AKSRT\\User\\Badges') || !Badges::enabled()) {
 			return;
 		}
 		$dict  = Badges::get_dictionary();
@@ -102,7 +102,7 @@ class BadgesAdmin {
 		if (!isset($_POST['aksrt_user_badges_nonce']) || !wp_verify_nonce(sanitize_text_field(wp_unslash((string) $_POST['aksrt_user_badges_nonce'])), 'aksrt_user_badges_admin')) {
 			return;
 		}
-		if (!class_exists('Badges') || !Badges::enabled()) {
+		if (!class_exists('AKSRT\\User\\Badges') || !Badges::enabled()) {
 			return;
 		}
 		$raw = isset($_POST['aksrt_user_badges']) ? (array) wp_unslash($_POST['aksrt_user_badges']) : [];
diff --git a/src/AKSRT/User/Home.php b/src/AKSRT/User/Home.php
index 8f825ca7..647a8d3e 100644
--- a/src/AKSRT/User/Home.php
+++ b/src/AKSRT/User/Home.php
@@ -161,7 +161,7 @@ class Home {
 
         if (!empty($settings['badge']['enabled']) && !empty($settings['badge']['public_display'])) {
             $limit = max(1, (int) ($settings['badge']['limit'] ?? 3));
-            if (class_exists('Badges')) {
+            if (class_exists('AKSRT\\User\\Badges')) {
                 $list = Badges::list_for_user($user_id, true);
                 $badge_count = 0;
                 foreach ((array) ($list['items'] ?? []) as $item) {
@@ -284,7 +284,7 @@ class Home {
         if ($source === 'manual_meta') {
             return max(0, (int) get_user_meta($user_id, 'aksrt_user_level', true));
         }
-        if (class_exists('Level')) {
+        if (class_exists('AKSRT\\User\\Level')) {
             return Level::get_level($user_id);
         }
         // Fallback: credits_balance thresholds (legacy) if integral class missing.
diff --git a/src/AKSRT/User/Metrics.php b/src/AKSRT/User/Metrics.php
index b5bf9575..5a4aa81e 100644
--- a/src/AKSRT/User/Metrics.php
+++ b/src/AKSRT/User/Metrics.php
@@ -73,7 +73,7 @@ class Metrics {
 	}
 
 	public static function reevaluate_medals(int $user_id): void {
-		if ($user_id > 0 && class_exists('Badges') && method_exists('Badges', 'auto_evaluate')) {
+		if ($user_id > 0 && class_exists('AKSRT\\User\\Badges') && method_exists('AKSRT\\User\\Badges', 'auto_evaluate')) {
 			Badges::auto_evaluate($user_id);
 		}
 	}
@@ -263,7 +263,7 @@ class Metrics {
 	/* ---------- level XP bridges ---------- */
 
 	private static function level_add(int $user_id, string $key): void {
-		if ($user_id > 0 && class_exists('Level')) {
+		if ($user_id > 0 && class_exists('AKSRT\\User\\Level')) {
 			Level::add($user_id, $key);
 		}
 	}