chore: add PingResp

sdgb-api/src/title/model/mod.rs

@@ -1,7 +1,5 @@
-use serde::Serialize;
-
-#[derive(Serialize)]
-pub struct Ping {}
+mod ping;
+pub use ping::{Ping, PingResp};
 
 mod get_user_preview_api;
 pub use get_user_preview_api::{GetUserPreviewApi, GetUserPreviewApiResp};

sdgb-api/src/title/model/ping/mod.rs

@@ -0,0 +1,18 @@
+use std::fmt::Display;
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize)]
+pub struct Ping {}
+
+#[derive(Debug, Deserialize)]
+pub struct PingResp {
+    result: String,
+}
+
+impl Display for PingResp {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(&self.result)?;
+        Ok(())
+    }
+}