diff --git a/apps/ai-game-creator-shell/src-tauri/src/project/resource_editor.rs b/apps/ai-game-creator-shell/src-tauri/src/project/resource_editor.rs
index 245b3ec82..b729c979f 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/project/resource_editor.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/project/resource_editor.rs
@@ -2483,7 +2483,19 @@ async fn editor_api_rejection_reason(response: reqwest::Response) -> Option<Stri
     if trimmed.is_empty() {
         return None;
     }
-    Some(trimmed.chars().take(200).collect())
+    // 平台把所有 4xx 都兜底成同一条通用文案（`http_error.rs`），真实原因在 `error.code` 里，
+    // 因此稳定码必须一起透出，否则用户和排障者只能看到"请求参数不合法"。
+    let code = value
+        .get("error")
+        .and_then(|error| error.get("code"))
+        .and_then(|code| code.as_str())
+        .map(str::trim)
+        .filter(|code| !code.is_empty() && *code != "BAD_REQUEST");
+    let reason: String = trimmed.chars().take(200).collect();
+    Some(match code {
+        Some(code) => format!("{reason}｜错误码 {code}"),
+        None => reason,
+    })
 }
 
 async fn submit_resource_edit_remote(