diff --git a/apps/ai-game-creator-shell/src-tauri/src/auth_error.rs b/apps/ai-game-creator-shell/src-tauri/src/auth_error.rs
index a64308628..172a7372c 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/auth_error.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/auth_error.rs
@@ -102,20 +102,6 @@ impl ClientAuthError {
             Self::SessionAuthorityRejected { .. } | Self::PermissionDenied { .. }
         )
     }
-
-    /// 登录态投影里 `errorKind` 的取值：只描述"哪一类失败"，不参与任何前端分支。
-    pub(crate) fn error_kind(&self) -> &'static str {
-        match self {
-            Self::AuthNetworkUnavailable { .. } => "network",
-            Self::AuthServiceUnavailable { .. } | Self::UnexpectedRejection { .. } => "service",
-            Self::AuthResponseMalformed { .. } => "response",
-            Self::ClientSessionPersistFailed { .. } => "storage",
-            Self::RuntimeSessionInstallFailed { .. } | Self::AuthClientInitFailed { .. } => {
-                "runtime"
-            }
-            _ => "auth",
-        }
-    }
 }
 
 impl fmt::Display for ClientAuthError {
diff --git a/apps/ai-game-creator-shell/src-tauri/src/auth_session.rs b/apps/ai-game-creator-shell/src-tauri/src/auth_session.rs
index a1b76d1a9..c0f247999 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/auth_session.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/auth_session.rs
@@ -49,9 +49,6 @@ pub(crate) struct ClientAuthStateView {
     pub(crate) user: Option<AuthUserPayload>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub(crate) api_base_url: Option<String>,
-    /// 失败分类：`network` / `service` / `response` / `storage` / `runtime` / `auth`；成功或未登录时为 `None`。
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub(crate) error_kind: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub(crate) error_message: Option<String>,
 }
@@ -785,7 +782,6 @@ fn auth_state_view(
         status: status.to_string(),
         user,
         api_base_url,
-        error_kind: None,
         error_message: None,
     }
 }
@@ -1045,7 +1041,6 @@ pub(crate) async fn read_client_auth_state(
                 status: "unavailable".to_string(),
                 user: None,
                 api_base_url: Some(session.api_base_url),
-                error_kind: Some("network".to_string()),
                 error_message: refresh.error_message,
             }),
         },
@@ -1053,7 +1048,6 @@ pub(crate) async fn read_client_auth_state(
             status: "unavailable".to_string(),
             user: None,
             api_base_url: Some(session.api_base_url),
-            error_kind: Some(error.error_kind().to_string()),
             error_message: Some(error.message().to_string()),
         }),
     }
@@ -1472,7 +1466,6 @@ mod tests {
                 wechat_account: None,
             }),
             api_base_url: Some(DEVELOPMENT_ORIGIN.to_string()),
-            error_kind: None,
             error_message: None,
         };
         let serialized = serde_json::to_string(&view).expect("serialize auth state");
diff --git a/apps/ai-game-creator-shell/src/services/clientAuth.ts b/apps/ai-game-creator-shell/src/services/clientAuth.ts
index 04c60af19..183730522 100644
--- a/apps/ai-game-creator-shell/src/services/clientAuth.ts
+++ b/apps/ai-game-creator-shell/src/services/clientAuth.ts
@@ -93,7 +93,6 @@ type RustAuthStateView = {
   status?: string;
   user?: AuthUser | null;
   apiBaseUrl?: string | null;
-  errorKind?: string | null;
   errorMessage?: string | null;
 };