fix(revenue): replicate the reference rebate poster canvas layers

The poster modal shell already matched the reference theme, but the canvas
drawing diverged from zibll's poster-share.js rebate branch in four places:

- No 推荐人 tags layer. The reference paints a red #fc4e1f 24px line at
  img_height+160; AKSRT dropped the layer entirely, so the poster lost the
  referrer attribution that identifies whose link it is.
- The logo slot painted text. The reference contains the real logo image
  into (80, height-190, 300, 100); AKSRT drew the site name as a 30px string
  plus a hardcoded 长按识别二维码访问 caption in that slot.
- Bottom copy was hardcoded. The reference reads share_desc; now sourced
  from the new pay_rebate_poster_desc_bottom field with share_desc fallback.
- No banner fallback. The reference walks banner → banner_default →
  banner_spare; a single broken URL left the top half of the poster black.

Also aligns the week label to the reference's 周 prefix (was 星期日) and ports
drawTextOverflow for wrapping/truncation, which retires the local wrapText.

Adds pay_rebate_poster_banner and pay_rebate_poster_desc_bottom to both the
Vue and PHP schemas; rest_me now returns logo, compatible and referrer_name.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/Admin/Schema/SchemaPayment.php

@@ -421,6 +421,8 @@ class SchemaPayment {
 							['key' => 'pay_rebate_poster_img', 'label' => '推广海报顶部图片', 'type' => 'media', 'default' => '', 'dependsOn' => ['key' => 'pay_rebate_poster_s', 'value' => true]],
 							['key' => 'pay_rebate_poster_title', 'label' => '推广海报标题(20-30个字)', 'type' => 'input', 'default' => '发现一个精品网站，快来看一看', 'dependsOn' => ['key' => 'pay_rebate_poster_s', 'value' => true]],
 							['key' => 'pay_rebate_poster_desc', 'label' => '推广海报简介(40-60个字)', 'type' => 'input', 'default' => '网站有超多精品资源和优惠福利，扫码进入网站还可享受诸多优惠哦', 'dependsOn' => ['key' => 'pay_rebate_poster_s', 'value' => true]],
+							['key' => 'pay_rebate_poster_banner', 'label' => '海报顶部备用图片', 'type' => 'media', 'default' => '', 'dependsOn' => ['key' => 'pay_rebate_poster_s', 'value' => true], 'help' => '顶部主图加载失败时依次回退到这里，再回退到主题内置图，避免海报顶部出现空白。'],
+							['key' => 'pay_rebate_poster_desc_bottom', 'label' => '海报底部文案', 'type' => 'input', 'default' => '扫描二维码阅读全文', 'dependsOn' => ['key' => 'pay_rebate_poster_s', 'value' => true], 'help' => '画在二维码下方居中位置，留空则使用默认文案。'],
 						]],
 						['key' => 'discount', 'title' => '推广让利标签', 'fields' => [
 							['key' => 'discount_notice', 'label' => '', 'type' => 'content', 'ui_only' => true, 'content' => '<p><b>推广让利标签配置详解：</b></p><ul style="margin:6px 0 0 18px;line-height:1.9"><li>可使用的变量：折扣 <code>%discount%</code>、推荐人姓名 <code>%referrer_name%</code></li><li>使用变量示例：<code>%referrer_name%推荐购买 下单再减%discount%元</code></li></ul>', 'dependsOn' => ['key' => 'pay_rebate_s', 'value' => true]],