feat: full parity pass - suspend enforcement, report modal polish, wechat notify

- Restriction: add is_suspended/get_active_suspend; comment block now covers
  suspend (小黑屋) in addition to mute, with reason in the deny message
- FrontSubmitSave::persist: block post/draft/edit submission for suspended
  users (reference-theme semantics: 小黑屋 loses all publishing rights)
- report.js: close icon switched from fa-times to the SVG sprite ic-close
  (#icon-close), same as reference theme; textareas gain autoHeight growth
  (hidden 'other reason' box skips the first measurement)
- WeChatNotify: NOTIFY_TYPES now includes report/system so report results
  and account restriction notices fan out to WeChat template messages;
  generic title/description fallback for template values
- contract tests: +3 tests (suspend enforcement, modal polish, wechat types)

src/Core/FrontSubmitSave.php

@@ -43,6 +43,16 @@ trait FrontSubmitSave {
             }
         }
 
+        // 小黑屋（suspend）：剥夺发布权限，发帖/草稿/编辑均拦截（对齐参考主题）。
+        if (!$is_guest && \AKSRT\User\Restriction::get_instance()->is_suspended($user_id)) {
+            $suspend = \AKSRT\User\Restriction::get_instance()->get_active_suspend($user_id);
+            $message = __('您已被关入小黑屋，暂时无法发布内容', 'aksrt');
+            if (!empty($suspend['reason'])) {
+                $message .= '，原因：' . $suspend['reason'];
+            }
+            return ['success' => false, 'message' => $message];
+        }
+
         if ($is_edit) {
             if (!$this->can_edit_post($posts_id, $user_id)) {
                 return ['success' => false, 'message' => __('没有编辑权限', 'aksrt')];