fix(revenue): match reference poster modal UI 1:1

The 推广海报 modal on the revenue page used a bespoke .uc-modal card —
white panel, 12px radius, heavy shadow, title bar, corner × button and a
full-width 保存海报 button — plus a light-gray plate with its own
border-radius around the poster canvas. None of that exists in the
reference theme, so the popup read as bordered and off-spec.

Rebuild the modal on the reference poster-share structure: a borderless
360px .modal-dialog.poster-share centred by .modal.flex.jc, a
.loading-mask overlay while the canvas renders, and the download/close
buttons moved onto a .abs-center.hover-show-con layer that only fades in
on hover. initAffiliatePoster() now drives Bootstrap 3 modal semantics
(.in toggle, .modal-backdrop, body.modal-open, ESC and backdrop-click to
close), mirroring the existing openChargeModal/closeChargeModal pair, and
animates .modal-content from the 220px placeholder to the poster's real
height before clearing the inline styles.

No CSS added — every rule the reference modal needs was already ported.
Drop the now-dead .uc-affiliate-poster rules; the shared .uc-modal shell
and openModal/closeModal stay for the withdraw and transfer modals.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/widget-system/referral-qr-contract.test.cjs

@@ -47,11 +47,19 @@ test('revenue detail card is a four-row info list with no standalone QR block',
   assert.doesNotMatch(script, /function renderAffiliateQr/)
   assert.doesNotMatch(script, /renderAffiliateQr\(/)
   assert.doesNotMatch(script, /data-affiliate-qr/)
-  // 海报弹窗：舞台 + 保存按钮 + 复用 openModal/closeModal。
+  // 海报弹窗：参考主题 poster-share 形态 —— Bootstrap 语义 + .poster-imgbox 舞台。
   assert.match(script, /data-affiliate-poster-stage/)
   assert.match(script, /data-affiliate-poster-download/)
-  assert.match(script, /openModal\(modal\)/)
+  assert.match(script, /modal-backdrop/)
+  assert.match(script, /classList\.add\('in'\)/)
+  assert.match(script, /poster-imgbox/)
+  assert.match(script, /classList\.add\('hide'\)/)
   assert.match(script, /link\.download = 'referral-poster\.png'/)
+  // 弹窗开关不再走 uc-modal 的 openModal/closeModal（那套留给提现/转账弹窗）。
+  const posterInit = script.slice(script.indexOf('function initAffiliatePoster'), script.indexOf('function buildPosterCanvas'))
+  assert.doesNotMatch(posterInit, /openModal\(modal\)/)
+  assert.doesNotMatch(posterInit, /closeModal\(modal\)/)
+  assert.doesNotMatch(posterInit, /data-affiliate-poster-close/)
   // 链接由 PHP 直出：复制按钮立即可用，REST 只负责海报配置与佣金比例。
   assert.match(script, /var url = input \? input\.value : '';/)
   assert.match(script, /if \(copy\) copy\.disabled = !url;/)
@@ -93,6 +101,31 @@ test('poster canvas is built from admin-configured copy and gated on the poster
   assert.match(script, /image\.crossOrigin = 'anonymous'/)
 })
 
+test('poster modal markup is a 1:1 replica of the reference poster-share dialog', () => {
+  const modal = read('inc', 'helpers', 'user-center-renderers', 'affiliate-poster-modal.php')
+  // 参考主题骨架：Bootstrap 模态壳 + 360px 无边框对话框 + hover 浮钮层。
+  assert.match(modal, /class="modal fade flex jc"/)
+  assert.match(modal, /class="modal-dialog poster-share hover-show"/)
+  assert.match(modal, /class="modal-content" style="height:220px;overflow:hidden"/)
+  assert.match(modal, /class="poster-imgbox hover-show" data-affiliate-poster-stage/)
+  assert.match(modal, /class="flex jc loading-mask absolute main-bg radius8"/)
+  assert.match(modal, /class="but cir jb-blue poster-download hide"/)
+  assert.match(modal, /class="but cir jb-yellow ml10"/)
+  assert.match(modal, /#icon-close/)
+  assert.match(modal, /data-dismiss="modal"/)
+  // 自研 uc-modal 卡片形态（白底 + 标题栏 + 整宽保存钮 + 浅灰画框）已退役。
+  assert.doesNotMatch(modal, /uc-modal__dialog/)
+  assert.doesNotMatch(modal, /uc-modal__title/)
+  assert.doesNotMatch(modal, /uc-modal__close/)
+  assert.doesNotMatch(modal, /uc-modal__overlay/)
+  assert.doesNotMatch(modal, /uc-affiliate-poster/)
+  assert.doesNotMatch(modal, /btn-block/)
+
+  // 配套的 .uc-affiliate-poster 画框规则已从样式表删除。
+  const css = read('assets', 'css', 'routes', 'user-center', 'revenue-earnings.css')
+  assert.doesNotMatch(css, /uc-affiliate-poster/)
+})
+
 test('invite-code input verifies live against the public REST endpoint', () => {
   const template = read('templates', 'parts', 'auth-content.php')
   assert.match(template, /data-invite-verify/)