feat(frontend): upgrade report dialog experience

Replace manual report links with automatic target association, improve validation and evidence uploads, and remove retired report UI code.

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

inc/helpers/comments/item.php

@@ -177,10 +177,9 @@ if (!function_exists('aksrt_get_comment_report_html')) :
 		}
 
 		$report_payload = wp_json_encode([
-			'target_type'   => 'comment',
-			'target_id'     => (int) $comment->comment_ID,
-			'target_name'   => get_comment_author($comment),
-			'target_avatar' => get_avatar_url((int) $comment->user_id > 0 ? (int) $comment->user_id : 0, ['size' => 40]) ?: '',
+			'target_type' => 'comment',
+			'target_id'   => (int) $comment->comment_ID,
+			'target_name' => get_comment_author($comment),
 		]);
 
 		return '<li><a class="comment-report-link" href="javascript:;" data-aksrt-report="' . esc_attr((string) $report_payload) . '"><i class="fa fas fa-exclamation-triangle mr10 fa-fw c-red" aria-hidden="true"></i>' . esc_html__('举报', 'aksrt') . '</a></li>';