fix sse no headers

add eventSourceInit

src/main/services/MCPService.ts

@@ -158,6 +158,9 @@ class McpService {
           return new StreamableHTTPClientTransport(new URL(server.baseUrl!), options)
         } else if (server.type === 'sse') {
           const options: SSEClientTransportOptions = {
+            eventSourceInit: {
+              fetch: (url, init) => fetch(url, { ...init, headers: server.headers || {} }),
+            },
             requestInit: {
               headers: server.headers || {}
             },