feat(creator-studio): switch writing editor to TinyMCE

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

src/Core/CreatorRest.php

@@ -214,7 +214,7 @@ final class CreatorRest {
 		$data  = [
 			'posts_id'     => $post_id,
 			'post_title'   => $payload['title'],
-			'post_content' => $this->block_content($payload['content']),
+			'post_content' => $payload['content'],
 			'excerpt'      => $payload['excerpt'],
 			'category'     => $payload['categories'],
 			'tags'         => implode(',', array_map('strval', $payload['tags'])),
@@ -298,7 +298,7 @@ final class CreatorRest {
 		$data = [
 			'posts_id'      => $post_id,
 			'post_title'    => $payload['title'],
-			'post_content'  => $this->block_content($payload['content']),
+			'post_content'  => $payload['content'],
 			'excerpt'       => $payload['excerpt'],
 			'category'      => $payload['categories'],
 			'tags'          => implode(',', array_map('strval', $payload['tags'])),
@@ -507,13 +507,6 @@ final class CreatorRest {
 		PrivateAssets::claim_many($keys, $post_id, $user_id);
 	}
 
-	/**
-	 * 客户端提交的是 JSON 区块，落到 post_content 前统一交给 wp_kses。
-	 */
-	private function block_content(string $content): string {
-		return $content;
-	}
-
 	/**
 	 * @param array<string, mixed> $settings
 	 * @return array<string, mixed>