fix(user-center): drop icon before unopened VIP status name

The status card always rendered the icon slot, so never-opened members saw a generic certificate glyph in front of 未开通会员 (level 0 has no configured icon and fell back to fa-certificate). Members with a real level keep their icon; only the level-0 case drops the slot.

Render the icon span only when vip_level_number > 0.

Verification: extended tests/widget-system/vip-tab-status-card.test.cjs (3 contract tests); node --test tests/**/*.test.cjs 638/638 pass; php -l clean.

inc/helpers/user-center-renderers/vip-tab.php

@@ -93,7 +93,8 @@ $status_html = '<div class="uc-vip-status" role="status">'
 	. '<span class="uc-vip-status__state">' . esc_html($vip_state_label) . '</span>'
 	. '</div>'
 	. '<div class="uc-vip-status__main uc-vip-status__main--level-' . (int) $vip_level_number . '">'
-	. '<span class="uc-vip-status__icon" aria-hidden="true">' . $status_icon . '</span>'
+	// 未开通（level 0）不输出图标位：名称前不放通用证书图标。
+	. ($vip_level_number > 0 ? '<span class="uc-vip-status__icon" aria-hidden="true">' . $status_icon . '</span>' : '')
 	. '<span class="uc-vip-status__level">' . esc_html($vip_level_name) . '</span>'
 	. '</div>'
 	. '<div class="uc-vip-status__desc">' . esc_html($vip_description) . '</div>'