refactor(assets): vendor 资产迁入标准目录并全仓去除 zibll 标识

- assets/vendor 全量迁移: fontawesome5→assets/fontawesome5, css→assets/css,
  js→assets/js/runtime(避开 14 个同名自有文件), img 合并去重→assets/img,
  fonts→assets/fonts; 删除 assets/vendor
- libs 五个与 widgets/third-party 字节相同的库不重复入库, loader paths 改指向
- 运行时切换: _win.uri=assets 根, loader baseUrl=/js/runtime, enlighter 注入
  路径同步; PHP 7 个引用文件切换并改名 $zibll_*→$runtime_*
- 去品牌: Qinver 头注释/品牌 console.log/演示链接清除, 默认文案中性化
- 功能标识符改名: zib__→aksrt__, zib_ajax→aksrt_ajax, window.zib→
  window.aksrtLegacy, zibllblock/*→aksrtblock/*, .zib-widget→.aksrt-panel,
  .zib-slider→.aksrt-slider, zib_menu_options meta 键等
- 自有 CSS 改名: legacy-utilities/compat-vars/footer shell
- admin SPA 重建; 契约测试同步(路径/断言/文件更名)
- 例外保留: tests/visual 对照环境与 fixtures 前缀(外部 Zibll 产品引用)

验证: php -l 133 个改动文件通过; runtime 86 个 JS node --check 通过;
契约测试 68/70(2 个失败经 stash 对照确认为存量问题)

inc/helpers/aksrt-pay.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * AKSRT Pay System — 统一付费内容系统（1:1 对齐 zibll）
+ * AKSRT Pay System — 统一付费内容系统（1:1 对齐 legacy）
  *
  * 核心机制：
  * - 任何 post 通过 _aksrt_pay meta 成为付费文章
@@ -218,7 +218,7 @@ if (!function_exists('aksrt_get_download_box_meta')) {
             'view_count'      => max(0, $view_count),
             'virtual_sales'   => $virtual_sales,
             'sales_volume'    => max(0, $sales_volume),
-            // Zibll: virtual (pay_cuont) + real sales_volume; fall back to downloads when no sales yet.
+            // legacy: virtual (pay_cuont) + real sales_volume; fall back to downloads when no sales yet.
             'sales_count'     => $show_sales ? ($virtual_sales + max(0, $sales_volume, $download_count)) : 0,
             'show_sales'      => $show_sales,
             'download_limit_over_price' => $over_price,
@@ -276,7 +276,7 @@ if (!function_exists('aksrt_bump_content_sales_volume')) {
 }
 
 /**
- * Whether guest cash purchase is allowed (Zibll pay_no_logged_in + pay_limit=0).
+ * Whether guest cash purchase is allowed (legacy pay_no_logged_in + pay_limit=0).
  */
 if (!function_exists('aksrt_allow_guest_content_pay')) {
     function aksrt_allow_guest_content_pay($post = null): bool {
@@ -307,7 +307,7 @@ if (!function_exists('aksrt_allow_guest_content_pay')) {
 }
 
 /**
- * Cookie lifetime days for guest paid content (Zibll pay_cookie_day).
+ * Cookie lifetime days for guest paid content (legacy pay_cookie_day).
  */
 if (!function_exists('aksrt_guest_pay_cookie_days')) {
     function aksrt_guest_pay_cookie_days(int $post_id = 0): int {
@@ -337,7 +337,7 @@ if (!function_exists('aksrt_pay_client_ip')) {
 }
 
 /**
- * Build token material for guest order cookie (zibll-style).
+ * Build token material for guest order cookie (legacy-style).
  *
  * @param array<string,mixed> $order
  */
@@ -385,7 +385,7 @@ if (!function_exists('aksrt_set_guest_pay_cookies')) {
 }
 
 /**
- * Set guest paid cookies after content order paid (Zibll zibpay_posts_order_created_set_cookie).
+ * Set guest paid cookies after content order paid (legacy aksrtpay_posts_order_created_set_cookie).
  *
  * @param array<string,mixed> $order
  */
@@ -477,7 +477,7 @@ if (!function_exists('aksrt_guest_has_paid_access')) {
 }
 
 /**
- * Resolve the amount a given user should pay for a post (Zibll VIP tier min).
+ * Resolve the amount a given user should pay for a post (legacy VIP tier min).
  *
  * VIP tier prices only apply when configured as a positive discount (< base).
  * Full free for VIP uses vip_free_download / exempt roles (handled separately).
@@ -560,7 +560,7 @@ if (!function_exists('aksrt_get_user_pay_price')) {
 }
 
 /**
- * Whether content cashier may accept coupons for this post (zibll coupon_post_s || coupon_s).
+ * Whether content cashier may accept coupons for this post (legacy coupon_post_s || coupon_s).
  */
 if (!function_exists('aksrt_is_content_coupon_allowed')) {
     function aksrt_is_content_coupon_allowed($post = null): bool {
@@ -582,7 +582,7 @@ if (!function_exists('aksrt_is_content_coupon_allowed')) {
 
 /**
  * Buyer-facing 推广折扣 amount for a post (0 if no eligible referrer).
- * Cash only; mirrors zibpay_get_post_rebate_discount.
+ * Cash only; mirrors aksrtpay_get_post_rebate_discount.
  */
 if (!function_exists('aksrt_get_post_rebate_discount')) {
     function aksrt_get_post_rebate_discount($post = null, int $user_id = 0): float {
@@ -615,18 +615,18 @@ if (!function_exists('aksrt_get_post_rebate_discount')) {
 }
 
 /**
- * Whether cash checkout may use points deduction (zibll points_deduction).
+ * Whether cash checkout may use points deduction (legacy points_deduction).
  *
- * zibll: zibpay_is_allow_points_deduction() always returns false ("暂未启用").
+ * legacy: aksrtpay_is_allow_points_deduction() always returns false ("暂未启用").
  * Keep the same contract: schema/UI may exist, runtime is hard-off unless filter overrides.
  */
 if (!function_exists('aksrt_is_allow_points_deduction')) {
     function aksrt_is_allow_points_deduction(string $context = 'content'): bool {
-        // Mirror zibll hard-off first.
+        // Mirror legacy hard-off first.
         $allowed = false;
         if (class_exists('\AKSRT\Settings\Settings') && method_exists('\AKSRT\Settings\Settings', 'get_all')) {
             $all = \AKSRT\Settings\Settings::get_all();
-            // Even if switch on, default remains false like zibll until product enables it.
+            // Even if switch on, default remains false like legacy until product enables it.
             if (!empty($all['points_deduction_s']) && class_exists('\AKSRT\Settings\Settings') && method_exists('\AKSRT\Settings\Settings', 'credits_enabled') && \AKSRT\Settings\Settings::credits_enabled()) {
                 $allowed = false; // still disabled at runtime
             }
@@ -637,7 +637,7 @@ if (!function_exists('aksrt_is_allow_points_deduction')) {
 
 /**
  * Content cashier does not accept card_pass payment_method.
- * Card-pass for balance/VIP/points is user-center redeem (zibll order types 4/8/9),
+ * Card-pass for balance/VIP/points is user-center redeem (legacy order types 4/8/9),
  * not content pay types (reading/download/gallery/video).
  */
 if (!function_exists('aksrt_is_content_card_pass_pay_allowed')) {
@@ -848,7 +848,7 @@ if (!function_exists('aksrt_get_download_cost')) {
 }
 
 /**
- * URL of the Zibll-style single-post download page (page template + ?post=ID).
+ * URL of the legacy-style single-post download page (page template + ?post=ID).
  */
 if (!function_exists('aksrt_get_single_download_page_url')) {
     function aksrt_get_single_download_page_url($post = null): string {
@@ -874,7 +874,7 @@ if (!function_exists('aksrt_get_single_download_page_url')) {
 }
 
 /**
- * Whether independent download page mode is enabled (Zibll down_alone_page).
+ * Whether independent download page mode is enabled (legacy down_alone_page).
  */
 if (!function_exists('aksrt_is_download_alone_page_enabled')) {
     function aksrt_is_download_alone_page_enabled(): bool {
@@ -993,7 +993,7 @@ if (!function_exists('aksrt_get_pay_type_badge')) {
 }
 
 /**
- * Zibll zibpay_get_service() — service bullets under pay/download box.
+ * legacy aksrtpay_get_service() — service bullets under pay/download box.
  *
  * @return string HTML list of service items.
  */
@@ -1045,7 +1045,7 @@ if (!function_exists('aksrt_get_pay_service_html')) {
 }
 
 /**
- * Demo link button (Zibll zibpay_get_demo_link).
+ * Demo link button (legacy aksrtpay_get_demo_link).
  */
 if (!function_exists('aksrt_get_demo_link_html')) {
     function aksrt_get_demo_link_html($post = null, string $class = 'resource-download-box__btn btn-outline resource-download-box__btn--demo'): string {
@@ -1072,7 +1072,7 @@ if (!function_exists('aksrt_get_demo_link_html')) {
 }
 
 /**
- * Product attributes row (Zibll zibpay_get_product_attributes).
+ * Product attributes row (legacy aksrtpay_get_product_attributes).
  */
 if (!function_exists('aksrt_get_pay_attributes_html')) {
     function aksrt_get_pay_attributes_html($post = null, string $class = 'resource-download-box__attrs'): string {