fix: disable unicode escaping in JSON encoding for MCP tools results

Author: jskorlol

src/Server/Request/ToolsCallHandler.php

@@ -29,7 +29,7 @@ public function execute(string $method, ?array $params = null): array
         }
 
         $tool = $this->toolRepository->getTool($name);
-        if (! $tool) {
+        if (!$tool) {
             throw new JsonRpcErrorException(message: "Tool '{$name}' not found", code: JsonRpcErrorCode::METHOD_NOT_FOUND);
         }
 
@@ -41,7 +41,7 @@ public function execute(string $method, ?array $params = null): array
                 'content' => [
                     [
                         'type' => 'text',
-                        'text' => is_string($result) ? $result : json_encode($result),
+                        'text' => is_string($result) ? $result : json_encode($result, JSON_UNESCAPED_UNICODE),
                     ],
                 ],
             ];

src/Transports/SseTransport.php

@@ -97,7 +97,7 @@ public function initialize(): void
     private function sendEvent(string $event, string $data): void
     {
         // 헤더 설정이 이미 전송되었는지 확인
-        if (! headers_sent()) {
+        if (!headers_sent()) {
             // 버퍼링 비활성화
             ini_set('output_buffering', 'off');
             ini_set('zlib.output_compression', false);
@@ -146,7 +146,7 @@ public function send(string|array $message): void
      */
     public function close(): void
     {
-        if (! $this->connected) {
+        if (!$this->connected) {
             return;
         }
 
@@ -306,7 +306,7 @@ public function pushMessage(string $clientId, array $message): void
             throw new Exception('Cannot push message: SSE Adapter is not configured.');
         }
 
-        $messageString = json_encode($message);
+        $messageString = json_encode($message, JSON_UNESCAPED_UNICODE);
         if ($messageString === false) {
             throw new Exception('Failed to JSON encode message for pushing: '.json_last_error_msg());
         }