diff --git a/backend/crates/gateway-admin/src/model/accounts.rs b/backend/crates/gateway-admin/src/model/accounts.rs
index 7c4636d77..6ddba7c75 100644
--- a/backend/crates/gateway-admin/src/model/accounts.rs
+++ b/backend/crates/gateway-admin/src/model/accounts.rs
@@ -13,15 +13,142 @@ use super::{PageSize, Revision, observability::TimeRange};
 pub use gateway_core::engine::credential::AccountAvailability;
 
 /// 管理页使用的归一化账号状态。
+///
+/// 只回答两个问题：是否可调度、是否需要人工干预。具体错误原因不进入此枚举，
+/// 由 [`AccountErrorReason`] 承载；新增原因只扩展 reason，不改变分类。
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum AccountStatus {
-    Active,
-    RateLimited,
+    /// 正常，可调度。
+    Normal,
+    /// 配额耗尽（持久化终态），等待额度恢复，无需干预。
     QuotaExhausted,
-    Expired,
-    Invalid,
+    /// 限流中（quota 快照级信号），自动恢复，无需干预。
+    RateLimited,
+    /// 管理员手动停用（`enabled = false`）。
     Disabled,
+    /// 错误（过期 / 失效 / 封禁等），需要人工干预。具体原因见 [`AccountErrorReason`]。
+    Error,
+}
+
+impl AccountStatus {
+    /// 返回稳定 wire 值。
+    #[must_use]
+    pub const fn as_str(self) -> &'static str {
+        match self {
+            Self::Normal => "normal",
+            Self::QuotaExhausted => "quota_exhausted",
+            Self::RateLimited => "rate_limited",
+            Self::Disabled => "disabled",
+            Self::Error => "error",
+        }
+    }
+
+    /// 解析稳定 wire 值。
+    #[must_use]
+    pub fn parse(value: &str) -> Option<Self> {
+        match value {
+            "normal" => Some(Self::Normal),
+            "quota_exhausted" => Some(Self::QuotaExhausted),
+            "rate_limited" => Some(Self::RateLimited),
+            "disabled" => Some(Self::Disabled),
+            "error" => Some(Self::Error),
+            _ => None,
+        }
+    }
+}
+
+/// 状态派生所需的最小事实；由 store / use_case 各自构造，派生规则唯一。
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct AccountStatusSignals {
+    pub enabled: bool,
+    pub availability: AccountAvailability,
+    pub access_token_expired: bool,
+    pub quota_limit_reached: bool,
+}
+
+impl AccountStatusSignals {
+    /// 派生产出运营分类。终态优先于瞬时信号：停用 > 配额耗尽 > 错误 > 限流。
+    #[must_use]
+    pub const fn derive(self) -> AccountStatus {
+        if !self.enabled {
+            AccountStatus::Disabled
+        } else if matches!(self.availability, AccountAvailability::QuotaExhausted) {
+            AccountStatus::QuotaExhausted
+        } else if self.access_token_expired
+            || matches!(
+                self.availability,
+                AccountAvailability::Expired
+                    | AccountAvailability::Invalid
+                    | AccountAvailability::Banned
+                    | AccountAvailability::Unknown
+            )
+        {
+            AccountStatus::Error
+        } else if self.quota_limit_reached {
+            AccountStatus::RateLimited
+        } else {
+            AccountStatus::Normal
+        }
+    }
+}
+
+/// 错误分类下的具体原因；仅在 `AccountStatus::Error` 时存在。
+///
+/// 受控枚举用于展示与聚合，扩展不改变状态分类。
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum AccountErrorReason {
+    Expired,
+    TokenExpired,
+    Invalid,
     Banned,
+    Unknown,
+}
+
+impl AccountErrorReason {
+    /// 返回稳定 wire 值。
+    #[must_use]
+    pub const fn as_str(self) -> &'static str {
+        match self {
+            Self::Expired => "expired",
+            Self::TokenExpired => "token_expired",
+            Self::Invalid => "invalid",
+            Self::Banned => "banned",
+            Self::Unknown => "unknown",
+        }
+    }
+
+    /// 解析稳定 wire 值。
+    #[must_use]
+    pub fn parse(value: &str) -> Option<Self> {
+        match value {
+            "expired" => Some(Self::Expired),
+            "token_expired" => Some(Self::TokenExpired),
+            "invalid" => Some(Self::Invalid),
+            "banned" => Some(Self::Banned),
+            "unknown" => Some(Self::Unknown),
+            _ => None,
+        }
+    }
+}
+
+/// 由信号派生错误原因；非错误分类（正常 / 配额耗尽 / 限流 / 停用）返回 `None`。
+///
+/// 与 [`AccountStatusSignals::derive`] 保持同一判定：`Error` 当且仅当此处返回 `Some`。
+#[must_use]
+pub fn derive_error_reason(signals: AccountStatusSignals) -> Option<AccountErrorReason> {
+    if !signals.enabled {
+        return None;
+    }
+    match signals.availability {
+        AccountAvailability::QuotaExhausted => None,
+        AccountAvailability::Ready => signals
+            .access_token_expired
+            .then_some(AccountErrorReason::TokenExpired),
+        AccountAvailability::Expired => Some(AccountErrorReason::Expired),
+        AccountAvailability::Invalid => Some(AccountErrorReason::Invalid),
+        AccountAvailability::Banned => Some(AccountErrorReason::Banned),
+        AccountAvailability::Unknown => Some(AccountErrorReason::Unknown),
+    }
 }
 
 /// 账号列表排序字段。
@@ -78,6 +205,8 @@ pub struct AccountRecord {
     pub enabled: bool,
     pub availability: AccountAvailability,
     pub availability_observed_at: DateTime<Utc>,
+    /// 最近一次非 ready 状态变更的原始原因（上游错误原文 / 原因码）；恢复 ready 后清空。
+    pub last_error_message: Option<String>,
     pub quota_observed_at: Option<DateTime<Utc>>,
     pub created_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
@@ -170,14 +299,15 @@ pub struct AccountPage {
 
 /// 统一账号目录的全局状态计数，不受当前筛选和分页影响。
 ///
-/// 配额耗尽与限流中是可恢复状态，分别计数；`unavailable` 只包含过期、失效、禁用和封禁账号。
+/// 计数与 [`AccountStatus`] 一一对应，由 store 按派生状态聚合。
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct AccountSummary {
     pub total: u64,
-    pub active: u64,
+    pub normal: u64,
     pub quota_exhausted: u64,
     pub rate_limited: u64,
-    pub unavailable: u64,
+    pub disabled: u64,
+    pub error: u64,
 }
 
 /// 账号启停写入命令。
diff --git a/backend/crates/gateway-admin/src/model/provider_credentials.rs b/backend/crates/gateway-admin/src/model/provider_credentials.rs
index 36e6e4b5d..735bb870d 100644
--- a/backend/crates/gateway-admin/src/model/provider_credentials.rs
+++ b/backend/crates/gateway-admin/src/model/provider_credentials.rs
@@ -11,7 +11,10 @@ use gateway_core::{
 
 use super::{
     AdminError, MutationActor, MutationContext, PageSize, Revision,
-    accounts::{AccountAvailability, AccountRecord, AccountStatus, AccountSummary, AccountUsage},
+    accounts::{
+        AccountAvailability, AccountErrorReason, AccountRecord, AccountStatus, AccountSummary,
+        AccountUsage,
+    },
 };
 
 /// Provider-owned JSON；公共层只搬运且 Debug 不输出值。
@@ -688,6 +691,8 @@ impl fmt::Debug for ProviderExport {
 pub struct AccountDirectoryItem {
     pub account: AccountRecord,
     pub status: AccountStatus,
+    /// `status == Error` 时的具体原因；其余状态为 `None`。
+    pub error_reason: Option<AccountErrorReason>,
     pub usage: Option<super::accounts::AccountUsage>,
     pub quota: ProviderQuota,
 }
diff --git a/backend/crates/gateway-admin/src/use_case/accounts.rs b/backend/crates/gateway-admin/src/use_case/accounts.rs
index b729a4707..cc3ce60db 100644
--- a/backend/crates/gateway-admin/src/use_case/accounts.rs
+++ b/backend/crates/gateway-admin/src/use_case/accounts.rs
@@ -18,7 +18,8 @@ use crate::{
         AdminError, MutationContext,
         accounts::{
             AccountConnectionTestEvent, AccountConnectionTestEventStream, AccountListQuery,
-            AccountRecord, AccountStatus, AccountUsageWindowQuery,
+            AccountRecord, AccountStatus, AccountStatusSignals, AccountUsageWindowQuery,
+            derive_error_reason,
         },
         observability::TimeRange,
         provider_credentials::{
@@ -216,8 +217,10 @@ impl DefaultAccountsService {
             std::slice::from_mut(&mut quota),
         )
         .await?;
+        let signals = account_signals(&account, quota.limit_reached, now);
         Ok(AccountDirectoryItem {
-            status: account_status(&account, quota.limit_reached, now),
+            status: signals.derive(),
+            error_reason: derive_error_reason(signals),
             usage: usage.into_iter().next(),
             account,
             quota,
@@ -301,11 +304,15 @@ impl AccountsService for DefaultAccountsService {
             .items
             .into_iter()
             .zip(quotas)
-            .map(|(account, quota)| AccountDirectoryItem {
-                status: account_status(&account, quota.limit_reached, now),
-                usage: usage.get(&account.id).cloned(),
-                account,
-                quota,
+            .map(|(account, quota)| {
+                let signals = account_signals(&account, quota.limit_reached, now);
+                AccountDirectoryItem {
+                    status: signals.derive(),
+                    error_reason: derive_error_reason(signals),
+                    usage: usage.get(&account.id).cloned(),
+                    account,
+                    quota,
+                }
             })
             .collect();
         Ok(AccountDirectoryPage {
@@ -516,39 +523,29 @@ fn empty_quota() -> ProviderQuota {
     }
 }
 
-/// 互斥页面状态：availability 终态优先，quota 快照级 `limit_reached` 派生
-/// `rate_limited`，`Unknown` 保守映射 `invalid`（不可调度，不显示为 active）。
+/// 构造状态派生所需的信号快照。
+fn account_signals(
+    account: &AccountRecord,
+    quota_limit_reached: bool,
+    now: chrono::DateTime<Utc>,
+) -> AccountStatusSignals {
+    AccountStatusSignals {
+        enabled: account.enabled,
+        availability: account.availability,
+        access_token_expired: account
+            .access_token_expires_at
+            .is_some_and(|expires_at| expires_at <= now),
+        quota_limit_reached,
+    }
+}
+
+/// 账号运营分类（互斥展示状态）。
 fn account_status(
     account: &AccountRecord,
     quota_limit_reached: bool,
     now: chrono::DateTime<Utc>,
 ) -> AccountStatus {
-    if !account.enabled {
-        AccountStatus::Disabled
-    } else if account.availability == crate::model::accounts::AccountAvailability::Banned {
-        AccountStatus::Banned
-    } else if account.availability == crate::model::accounts::AccountAvailability::QuotaExhausted {
-        AccountStatus::QuotaExhausted
-    } else if matches!(
-        account.availability,
-        crate::model::accounts::AccountAvailability::Invalid
-    ) {
-        AccountStatus::Invalid
-    } else if matches!(
-        account.availability,
-        crate::model::accounts::AccountAvailability::Expired
-    ) || account
-        .access_token_expires_at
-        .is_some_and(|expires_at| expires_at <= now)
-    {
-        AccountStatus::Expired
-    } else if quota_limit_reached {
-        AccountStatus::RateLimited
-    } else if account.availability == crate::model::accounts::AccountAvailability::Unknown {
-        AccountStatus::Invalid
-    } else {
-        AccountStatus::Active
-    }
+    account_signals(account, quota_limit_reached, now).derive()
 }
 
 fn retained_usage_range(now: chrono::DateTime<Utc>, retention_days: u32) -> TimeRange {
diff --git a/backend/crates/gateway-admin/tests/use_case/accounts.rs b/backend/crates/gateway-admin/tests/use_case/accounts.rs
index 3cb8bdb5f..76a21528c 100644
--- a/backend/crates/gateway-admin/tests/use_case/accounts.rs
+++ b/backend/crates/gateway-admin/tests/use_case/accounts.rs
@@ -451,10 +451,11 @@ impl AccountStore for FakeAccountStore {
             total: accounts.len() as u64,
             summary: AccountSummary {
                 total: accounts.len() as u64,
-                active: 1,
+                normal: 1,
                 quota_exhausted: 0,
                 rate_limited: 0,
-                unavailable: 0,
+                disabled: 0,
+                error: 0,
             },
         })
     }
@@ -845,7 +846,7 @@ async fn connection_test_should_probe_unavailable_account() {
 }
 
 #[tokio::test]
-async fn connection_test_rate_limited_probe_preserves_active_account_status() {
+async fn connection_test_rate_limited_probe_preserves_normal_account_status() {
     let events = events();
     let provider = FakeProviderAdmin::new("xai", events.clone());
     let store = FakeAccountStore::new("xai", events);
@@ -868,7 +869,7 @@ async fn connection_test_rate_limited_probe_preserves_active_account_status() {
     assert!(matches!(
         events.last(),
         Some(AccountConnectionTestEvent::Failed {
-            account_status: gateway_admin::model::accounts::AccountStatus::Active,
+            account_status: gateway_admin::model::accounts::AccountStatus::Normal,
             ..
         })
     ));
@@ -949,7 +950,7 @@ async fn accounts_refresh_should_keep_guard_through_store_commit() {
     assert_eq!(result.account.account.provider_kind.as_str(), "openai");
     assert_eq!(
         result.account.status,
-        gateway_admin::model::accounts::AccountStatus::Active
+        gateway_admin::model::accounts::AccountStatus::Normal
     );
 
     assert_eq!(
@@ -985,12 +986,12 @@ async fn accounts_list_should_return_complete_directory_semantics() {
         .expect("complete account directory");
 
     assert_eq!(page.summary.total, 1);
-    assert_eq!(page.summary.active, 1);
+    assert_eq!(page.summary.normal, 1);
     let account = page.items.first().expect("account item");
     assert_eq!(account.account.provider_kind.as_str(), "openai");
     assert_eq!(
         account.status,
-        gateway_admin::model::accounts::AccountStatus::Active
+        gateway_admin::model::accounts::AccountStatus::Normal
     );
 }
 
@@ -1089,8 +1090,8 @@ async fn accounts_list_should_prefer_quota_exhaustion_over_stale_token_expiry()
 }
 
 #[tokio::test]
-async fn accounts_list_should_map_unknown_availability_to_invalid_not_active() {
-    // Unknown 不可调度，Admin 不得显示为 active。
+async fn accounts_list_should_map_unknown_availability_to_error_not_normal() {
+    // Unknown 不可调度，Admin 不得显示为 normal。
     let provider = FakeProviderAdmin::new("openai", events());
     let mut account = account_record("openai");
     account.availability = AccountAvailability::Unknown;
@@ -1112,7 +1113,7 @@ async fn accounts_list_should_map_unknown_availability_to_invalid_not_active() {
 
     assert_eq!(
         page.items.first().expect("account item").status,
-        gateway_admin::model::accounts::AccountStatus::Invalid,
+        gateway_admin::model::accounts::AccountStatus::Error,
     );
 }
 
@@ -1333,6 +1334,7 @@ pub(super) fn account_record(kind: &str) -> AccountRecord {
         enabled: true,
         availability: AccountAvailability::Ready,
         availability_observed_at: now,
+        last_error_message: None,
         quota_observed_at: None,
         created_at: now,
         updated_at: now,
diff --git a/backend/crates/gateway-api/src/admin/accounts.rs b/backend/crates/gateway-api/src/admin/accounts.rs
index 56bc339b1..e1c08727e 100644
--- a/backend/crates/gateway-api/src/admin/accounts.rs
+++ b/backend/crates/gateway-api/src/admin/accounts.rs
@@ -91,7 +91,8 @@ impl ListQuery {
         let status = match self.status.as_deref().map(str::trim) {
             None | Some("") => None,
             Some(value) => Some(
-                parse_account_status(value).ok_or_else(|| WireValidationError::new("status"))?,
+                DomainAccountStatus::parse(&value.to_ascii_lowercase())
+                    .ok_or_else(|| WireValidationError::new("status"))?,
             ),
         };
         let sort = match (self.sort_by.as_deref(), self.sort_direction.as_deref()) {
@@ -127,19 +128,6 @@ fn parse_provider(value: &str) -> Result<Option<ProviderKind>, WireValidationErr
         .map_err(|_| WireValidationError::new("provider"))
 }
 
-fn parse_account_status(value: &str) -> Option<DomainAccountStatus> {
-    match value.trim().to_ascii_lowercase().as_str() {
-        "active" => Some(DomainAccountStatus::Active),
-        "rate_limited" => Some(DomainAccountStatus::RateLimited),
-        "expired" => Some(DomainAccountStatus::Expired),
-        "invalid" => Some(DomainAccountStatus::Invalid),
-        "quota_exhausted" => Some(DomainAccountStatus::QuotaExhausted),
-        "disabled" => Some(DomainAccountStatus::Disabled),
-        "banned" => Some(DomainAccountStatus::Banned),
-        _ => None,
-    }
-}
-
 fn parse_sort_field(value: &str) -> Option<AccountSortField> {
     match value.trim() {
         "email" => Some(AccountSortField::Email),
@@ -174,10 +162,11 @@ pub struct AccountPageData {
 #[serde(rename_all = "camelCase")]
 pub struct AccountSummaryView {
     pub total: u64,
-    pub active: u64,
+    pub normal: u64,
     pub quota_exhausted: u64,
     pub rate_limited: u64,
-    pub unavailable: u64,
+    pub disabled: u64,
+    pub error: u64,
 }
 
 /// 一条安全账号视图。
@@ -197,6 +186,10 @@ pub struct AccountView {
     pub has_refresh_token: bool,
     pub status: String,
     pub display_status: String,
+    /// `status == "error"` 时的具体原因；其余状态为 `null`。
+    pub error_reason: Option<String>,
+    /// 最近一次失败的上游错误描述；仅错误状态存在。
+    pub error_message: Option<String>,
     pub availability: String,
     pub enabled: bool,
     pub access_token_expires_at: Option<String>,
@@ -530,7 +523,7 @@ impl From<DomainConnectionTestEvent> for AccountConnectionTestEvent {
             DomainConnectionTestEvent::Completed { account_status } => serde_json::json!({
                 "type": "test_complete",
                 "success": true,
-                "accountStatus": account_status_name(account_status)
+                "accountStatus": account_status.as_str()
             }),
             DomainConnectionTestEvent::Failed {
                 message,
@@ -548,7 +541,7 @@ impl From<DomainConnectionTestEvent> for AccountConnectionTestEvent {
                 "upstreamStatus": upstream_status,
                 "upstreamContentType": upstream_content_type,
                 "upstreamBody": upstream_body,
-                "accountStatus": account_status_name(account_status)
+                "accountStatus": account_status.as_str()
             }),
         };
         Self { data }
@@ -1336,10 +1329,11 @@ fn account_page_data(
         page: PageMeta::new(page, u32::from(page_size), result.total, total_pages),
         summary: AccountSummaryView {
             total: result.summary.total,
-            active: result.summary.active,
+            normal: result.summary.normal,
             quota_exhausted: result.summary.quota_exhausted,
             rate_limited: result.summary.rate_limited,
-            unavailable: result.summary.unavailable,
+            disabled: result.summary.disabled,
+            error: result.summary.error,
         },
     }
 }
@@ -1370,10 +1364,11 @@ fn account_view(item: AccountDirectoryItem, now: DateTime<Utc>) -> AccountView {
     let AccountDirectoryItem {
         account,
         status,
+        error_reason,
         usage,
         quota,
     } = item;
-    let status = account_status_name(status).to_owned();
+    let status = status.as_str().to_owned();
     let expires_at = account.access_token_expires_at.as_ref().map(china_rfc3339);
     let added_at = china_rfc3339(&account.created_at);
     let updated_at = china_rfc3339(&account.updated_at);
@@ -1392,6 +1387,8 @@ fn account_view(item: AccountDirectoryItem, now: DateTime<Utc>) -> AccountView {
         has_refresh_token: account.has_refresh_token,
         status: status.clone(),
         display_status: status,
+        error_reason: error_reason.map(|reason| reason.as_str().to_owned()),
+        error_message: account.last_error_message,
         availability: account.availability.as_str().to_owned(),
         enabled: account.enabled,
         access_token_expires_at: expires_at,
@@ -1717,18 +1714,6 @@ fn provider_document_value(document: ProviderDocument) -> Value {
     Value::Object(document.into_provider_data().into_inner())
 }
 
-fn account_status_name(status: DomainAccountStatus) -> &'static str {
-    match status {
-        DomainAccountStatus::Active => "active",
-        DomainAccountStatus::RateLimited => "rate_limited",
-        DomainAccountStatus::QuotaExhausted => "quota_exhausted",
-        DomainAccountStatus::Expired => "expired",
-        DomainAccountStatus::Invalid => "invalid",
-        DomainAccountStatus::Disabled => "disabled",
-        DomainAccountStatus::Banned => "banned",
-    }
-}
-
 fn relative_time(value: DateTime<Utc>, now: DateTime<Utc>) -> String {
     let elapsed = now.signed_duration_since(value);
     if elapsed.num_seconds() < 0 {
diff --git a/backend/crates/gateway-api/tests/admin/accounts.rs b/backend/crates/gateway-api/tests/admin/accounts.rs
index 3371e06e5..7a331db5c 100644
--- a/backend/crates/gateway-api/tests/admin/accounts.rs
+++ b/backend/crates/gateway-api/tests/admin/accounts.rs
@@ -10,7 +10,7 @@ mod query {
             "pageSize": 20,
             "provider": "xai",
             "search": "  operator  ",
-            "status": "active",
+            "status": "normal",
             "sortBy": "lastUsedAt",
             "sortDirection": "desc"
         }))
@@ -23,7 +23,7 @@ mod query {
             Some(ref provider) if provider.as_str() == "xai"
         ));
         assert_eq!(query.search.as_deref(), Some("operator"));
-        assert_eq!(query.status, Some(AccountStatus::Active));
+        assert_eq!(query.status, Some(AccountStatus::Normal));
         assert_eq!(
             query.sort.expect("sort").field,
             AccountSortField::LastUsedAt
@@ -344,7 +344,7 @@ mod actions {
                 text: "OK".to_owned(),
             },
             DomainConnectionTestEvent::Completed {
-                account_status: AccountStatus::Active,
+                account_status: AccountStatus::Normal,
             },
             DomainConnectionTestEvent::Failed {
                 message: "upstream unavailable".to_owned(),
@@ -378,7 +378,7 @@ mod actions {
                     }
                 }),
                 json!({ "type": "content", "text": "OK" }),
-                json!({ "type": "test_complete", "success": true, "accountStatus": "active" }),
+                json!({ "type": "test_complete", "success": true, "accountStatus": "normal" }),
                 json!({
                     "type": "error",
                     "error": "upstream unavailable",
diff --git a/backend/crates/gateway-core/src/engine/credential.rs b/backend/crates/gateway-core/src/engine/credential.rs
index 458ceab2d..76bd88fb7 100644
--- a/backend/crates/gateway-core/src/engine/credential.rs
+++ b/backend/crates/gateway-core/src/engine/credential.rs
@@ -607,6 +607,8 @@ pub struct AccountStateChange {
     pub expected_revision: CredentialRevision,
     pub availability: AccountAvailability,
     pub observed_at: SystemTime,
+    /// 上游原因（错误原文 / 原因码）；`Some` 写入持久化错误信息，`None` 不更新，恢复 `Ready` 时清空。
+    pub message: Option<String>,
 }
 
 /// `provider_accounts` 的数据库中立端口。
diff --git a/backend/crates/gateway-store/src/postgres/provider_accounts/core_adapter.rs b/backend/crates/gateway-store/src/postgres/provider_accounts/core_adapter.rs
index f25f345df..0cebdb526 100644
--- a/backend/crates/gateway-store/src/postgres/provider_accounts/core_adapter.rs
+++ b/backend/crates/gateway-store/src/postgres/provider_accounts/core_adapter.rs
@@ -247,6 +247,7 @@ impl ProviderAccountStore for PgProviderAccountRepository {
                     .map_err(core_store_error)?,
                 availability: change.availability,
                 availability_observed_at: DateTime::<Utc>::from(change.observed_at),
+                message: change.message,
             })
             .await
             .map_err(core_store_error)?;
diff --git a/backend/crates/gateway-store/src/postgres/provider_accounts/mapping.rs b/backend/crates/gateway-store/src/postgres/provider_accounts/mapping.rs
index 3809abbfe..8622afd41 100644
--- a/backend/crates/gateway-store/src/postgres/provider_accounts/mapping.rs
+++ b/backend/crates/gateway-store/src/postgres/provider_accounts/mapping.rs
@@ -2,6 +2,8 @@
 
 use super::*;
 
+use gateway_admin::model::accounts::AccountStatusSignals;
+
 pub(crate) struct AdminAccountListItem {
     pub(crate) account: ProviderAccountSummary,
     pub(crate) status: AdminAccountStatus,
@@ -59,27 +61,16 @@ pub(crate) fn admin_account_status(
     account: &ProviderAccountSummary,
     now: DateTime<Utc>,
 ) -> AdminAccountStatus {
-    if !account.enabled {
-        AdminAccountStatus::Disabled
-    } else if account.availability == AccountAvailability::Banned {
-        AdminAccountStatus::Banned
-    } else if account.availability == AccountAvailability::QuotaExhausted {
-        AdminAccountStatus::QuotaExhausted
-    } else if account.availability == AccountAvailability::Invalid {
-        AdminAccountStatus::Invalid
-    } else if account.availability == AccountAvailability::Expired
-        || account
+    // 派生规则唯一归属 gateway-admin 域层，此处只做类型适配。
+    AccountStatusSignals {
+        enabled: account.enabled,
+        availability: account.availability,
+        access_token_expired: account
             .access_token_expires_at
-            .is_some_and(|expires_at| expires_at <= now)
-    {
-        AdminAccountStatus::Expired
-    } else if account.quota_limit_reached {
-        AdminAccountStatus::RateLimited
-    } else if account.availability == AccountAvailability::Unknown {
-        AdminAccountStatus::Invalid
-    } else {
-        AdminAccountStatus::Active
+            .is_some_and(|expires_at| expires_at <= now),
+        quota_limit_reached: account.quota_limit_reached,
     }
+    .derive()
 }
 
 pub(crate) fn admin_account_summary(
@@ -88,26 +79,25 @@ pub(crate) fn admin_account_summary(
 ) -> AccountSummary {
     let mut summary = AccountSummary {
         total: u64::try_from(accounts.len()).unwrap_or(u64::MAX),
-        active: 0,
+        normal: 0,
         quota_exhausted: 0,
         rate_limited: 0,
-        unavailable: 0,
+        disabled: 0,
+        error: 0,
     };
     for account in accounts {
         match admin_account_status(account, now) {
-            AdminAccountStatus::Active => summary.active = summary.active.saturating_add(1),
+            AdminAccountStatus::Normal => summary.normal = summary.normal.saturating_add(1),
             AdminAccountStatus::QuotaExhausted => {
                 summary.quota_exhausted = summary.quota_exhausted.saturating_add(1);
             }
             AdminAccountStatus::RateLimited => {
                 summary.rate_limited = summary.rate_limited.saturating_add(1);
             }
-            AdminAccountStatus::Expired
-            | AdminAccountStatus::Invalid
-            | AdminAccountStatus::Disabled
-            | AdminAccountStatus::Banned => {
-                summary.unavailable = summary.unavailable.saturating_add(1);
+            AdminAccountStatus::Disabled => {
+                summary.disabled = summary.disabled.saturating_add(1);
             }
+            AdminAccountStatus::Error => summary.error = summary.error.saturating_add(1),
         }
     }
     summary
@@ -124,9 +114,7 @@ pub(crate) fn sort_admin_account_items(
     items.sort_by(|left, right| {
         let ordering = match sort.field {
             AdminAccountSortField::Email => left.account.email.cmp(&right.account.email),
-            AdminAccountSortField::Status => {
-                admin_account_status_name(left.status).cmp(admin_account_status_name(right.status))
-            }
+            AdminAccountSortField::Status => left.status.as_str().cmp(right.status.as_str()),
             AdminAccountSortField::PlanType => left.account.plan_type.cmp(&right.account.plan_type),
             AdminAccountSortField::Usage => left
                 .usage
@@ -156,18 +144,6 @@ pub(crate) fn sort_admin_account_items(
     });
 }
 
-pub(crate) const fn admin_account_status_name(status: AdminAccountStatus) -> &'static str {
-    match status {
-        AdminAccountStatus::Active => "active",
-        AdminAccountStatus::RateLimited => "rate_limited",
-        AdminAccountStatus::Expired => "expired",
-        AdminAccountStatus::Invalid => "invalid",
-        AdminAccountStatus::QuotaExhausted => "quota_exhausted",
-        AdminAccountStatus::Disabled => "disabled",
-        AdminAccountStatus::Banned => "banned",
-    }
-}
-
 pub(crate) fn admin_account_record(
     summary: ProviderAccountSummary,
 ) -> AdminStoreResult<AccountRecord> {
@@ -193,6 +169,7 @@ pub(crate) fn admin_account_record(
         enabled: summary.enabled,
         availability: summary.availability,
         availability_observed_at: summary.availability_observed_at,
+        last_error_message: summary.last_error_message,
         quota_observed_at: summary.quota_observed_at,
         created_at: summary.created_at,
         updated_at: summary.updated_at,
diff --git a/backend/crates/gateway-store/src/postgres/provider_accounts/repository.rs b/backend/crates/gateway-store/src/postgres/provider_accounts/repository.rs
index 5d4d0f8af..57b34186f 100644
--- a/backend/crates/gateway-store/src/postgres/provider_accounts/repository.rs
+++ b/backend/crates/gateway-store/src/postgres/provider_accounts/repository.rs
@@ -95,7 +95,7 @@ impl ProviderAccountRepository for PgProviderAccountRepository {
                     upstream_account_id, plan_type, authentication_kind, credential_revision, has_refresh_token,
                     access_token_expires_at, next_refresh_at, enabled, availability,
                     availability_observed_at,
-                    quota_observed_at, quota_limit_reached, created_at, updated_at
+                    quota_observed_at, quota_limit_reached, last_error_message, created_at, updated_at
              from provider_accounts
              where ($1::text is null or provider_kind = $1) and ($2 or enabled)
              order by provider_kind, name, id",
@@ -214,6 +214,11 @@ impl ProviderAccountRepository for PgProviderAccountRepository {
                      when enabled then $4
                      else availability_observed_at
                  end,
+                 last_error_message = case
+                     when enabled then
+                         case when $3 = 'ready' then null else coalesce($5, last_error_message) end
+                     else last_error_message
+                 end,
                  updated_at = case when enabled then greatest(now(), $4) else updated_at end
              where id = $1 and credential_revision = $2
                and (availability_observed_at is null or availability_observed_at <= $4)",
@@ -222,6 +227,7 @@ impl ProviderAccountRepository for PgProviderAccountRepository {
         .bind(to_i64(update.expected_revision.get())?)
         .bind(update.availability.as_str())
         .bind(update.availability_observed_at)
+        .bind(update.message.as_deref())
         .execute(&self.pool)
         .await
         .map_err(|_| postgres_unavailable("apply provider account state"))?;
diff --git a/backend/crates/gateway-store/src/postgres/provider_accounts/rows.rs b/backend/crates/gateway-store/src/postgres/provider_accounts/rows.rs
index c8b54afa0..03f405c1f 100644
--- a/backend/crates/gateway-store/src/postgres/provider_accounts/rows.rs
+++ b/backend/crates/gateway-store/src/postgres/provider_accounts/rows.rs
@@ -90,6 +90,8 @@ pub struct ProviderAccountSummary {
     pub quota_observed_at: Option<DateTime<Utc>>,
     /// 快照级限流事实（Provider 物化）。
     pub quota_limit_reached: bool,
+    /// 最近一次非 ready 状态变更的原始原因（上游错误原文 / 原因码）；恢复 ready 后清空。
+    pub last_error_message: Option<String>,
     pub created_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
 }
@@ -310,6 +312,8 @@ pub struct ProviderAccountStateUpdate {
     pub expected_revision: Revision,
     pub availability: AccountAvailability,
     pub availability_observed_at: DateTime<Utc>,
+    /// 上游原因（错误原文 / 原因码）；`None` 不更新错误信息列，恢复 `Ready` 时清空。
+    pub message: Option<String>,
 }
 
 impl ProviderAccountStateUpdate {
@@ -335,14 +339,14 @@ impl ProviderAccountObservation {
 pub(crate) const ACCOUNT_SELECT: &str = "select id, provider_kind, name, email, upstream_user_id,
             upstream_account_id, plan_type, authentication_kind, provider_credentials_json, credential_revision,
             has_refresh_token, access_token_expires_at, next_refresh_at, enabled, availability,
-            provider_quota_json, quota_limit_reached,
+            provider_quota_json, quota_limit_reached, last_error_message,
             availability_observed_at, quota_observed_at, created_at, updated_at
      from provider_accounts where id = $1";
 
 pub(crate) const ACCOUNT_SELECT_BY_IDS: &str = "select id, provider_kind, name, email, upstream_user_id,
             upstream_account_id, plan_type, authentication_kind, provider_credentials_json, credential_revision,
             has_refresh_token, access_token_expires_at, next_refresh_at, enabled, availability,
-            provider_quota_json, quota_limit_reached,
+            provider_quota_json, quota_limit_reached, last_error_message,
             availability_observed_at, quota_observed_at, created_at, updated_at
      from provider_accounts
      where id = any($1::text[]) and provider_kind = $2
@@ -445,6 +449,7 @@ pub(crate) fn account_summary_from_row(
         availability_observed_at: get(&row, "availability_observed_at")?,
         quota_observed_at: get(&row, "quota_observed_at")?,
         quota_limit_reached: get(&row, "quota_limit_reached")?,
+        last_error_message: get(&row, "last_error_message")?,
         created_at: get(&row, "created_at")?,
         updated_at: get(&row, "updated_at")?,
     })
diff --git a/backend/crates/gateway-store/tests/postgres/provider_accounts.rs b/backend/crates/gateway-store/tests/postgres/provider_accounts.rs
index 73eac2252..f651f45b6 100644
--- a/backend/crates/gateway-store/tests/postgres/provider_accounts.rs
+++ b/backend/crates/gateway-store/tests/postgres/provider_accounts.rs
@@ -160,6 +160,7 @@ async fn delayed_provider_observations_cannot_overwrite_newer_state_or_quota() {
 
     repository
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account_id.clone(),
             expected_revision: revision,
             availability: AccountAvailability::QuotaExhausted,
@@ -170,6 +171,7 @@ async fn delayed_provider_observations_cannot_overwrite_newer_state_or_quota() {
     assert!(
         repository
             .apply_state_change(AccountStateChange {
+                message: None,
                 account_id: account_id.clone(),
                 expected_revision: revision,
                 availability: AccountAvailability::Ready,
@@ -200,6 +202,61 @@ async fn delayed_provider_observations_cannot_overwrite_newer_state_or_quota() {
     database.close().await;
 }
 
+#[tokio::test]
+async fn account_state_message_is_persisted_and_cleared_on_recovery() {
+    let Some(database) = TestDatabase::create("provider_account_state_message").await else {
+        return;
+    };
+    let repository = PgProviderAccountRepository::new(database.pool.clone());
+    let account_id = ProviderAccountId::new("acct_state_message").expect("account ID");
+    repository
+        .insert_provider_account(account(account_id.as_str(), "user-state-message"))
+        .await
+        .expect("insert state message fixture");
+    let revision = CredentialRevision::new(1).expect("revision");
+
+    repository
+        .apply_state_change(AccountStateChange {
+            message: Some("upstream returned 402 payment required".to_owned()),
+            account_id: account_id.clone(),
+            expected_revision: revision,
+            availability: AccountAvailability::QuotaExhausted,
+            observed_at: SystemTime::now(),
+        })
+        .await
+        .expect("persist error message");
+    let stored: Option<String> =
+        sqlx::query_scalar("select last_error_message from provider_accounts where id = $1")
+            .bind(account_id.as_str())
+            .fetch_one(&database.pool)
+            .await
+            .expect("read error message");
+    assert_eq!(
+        stored.as_deref(),
+        Some("upstream returned 402 payment required")
+    );
+
+    repository
+        .apply_state_change(AccountStateChange {
+            message: None,
+            account_id: account_id.clone(),
+            expected_revision: revision,
+            availability: AccountAvailability::Ready,
+            observed_at: SystemTime::now(),
+        })
+        .await
+        .expect("recover account");
+    let cleared: Option<String> =
+        sqlx::query_scalar("select last_error_message from provider_accounts where id = $1")
+            .bind(account_id.as_str())
+            .fetch_one(&database.pool)
+            .await
+            .expect("read cleared error message");
+    assert_eq!(cleared, None);
+
+    database.close().await;
+}
+
 #[tokio::test]
 async fn terminal_admin_list_filters_and_sorts_before_pagination_with_retained_usage() {
     let Some(database) = TestDatabase::create("provider_account_terminal_list").await else {
@@ -322,16 +379,18 @@ async fn terminal_admin_list_filters_and_sorts_before_pagination_with_retained_u
     assert_eq!(usage_page.config_revision.get(), 1);
     assert_eq!(usage_page.total, 6);
     assert_eq!(usage_page.summary.total, 6);
-    assert_eq!(usage_page.summary.active, 1);
+    assert_eq!(usage_page.summary.normal, 1);
     assert_eq!(usage_page.summary.quota_exhausted, 1);
     assert_eq!(usage_page.summary.rate_limited, 1);
-    assert_eq!(usage_page.summary.unavailable, 3);
+    assert_eq!(usage_page.summary.disabled, 1);
+    assert_eq!(usage_page.summary.error, 2);
     assert_eq!(
         usage_page.summary.total,
-        usage_page.summary.active
+        usage_page.summary.normal
             + usage_page.summary.quota_exhausted
             + usage_page.summary.rate_limited
-            + usage_page.summary.unavailable
+            + usage_page.summary.disabled
+            + usage_page.summary.error
     );
     assert_eq!(
         usage_page
@@ -371,7 +430,7 @@ async fn terminal_admin_list_filters_and_sorts_before_pagination_with_retained_u
             page_size: PageSize::new(10).expect("page size"),
             provider_kind: Some(ProviderKind::new("openai").expect("Provider kind")),
             search: Some("ALPHA@EXAMPLE".to_owned()),
-            status: Some(AccountStatus::Active),
+            status: Some(AccountStatus::Normal),
             sort: None,
         })
         .await
@@ -381,18 +440,20 @@ async fn terminal_admin_list_filters_and_sorts_before_pagination_with_retained_u
     assert_eq!(filtered.items[0].id, "acct_alpha");
     assert_eq!(filtered.items[0].provider_kind.as_str(), "openai");
 
-    let banned = store
+    let error_accounts = store
         .list_accounts(AccountListQuery {
             page: 1,
             page_size: PageSize::new(10).expect("page size"),
             provider_kind: None,
             search: None,
-            status: Some(AccountStatus::Banned),
+            status: Some(AccountStatus::Error),
             sort: None,
         })
         .await
-        .expect("filter banned accounts");
-    assert_eq!(banned.items[0].id, "acct_beta");
+        .expect("filter error accounts");
+    assert_eq!(error_accounts.items.len(), 2);
+    assert_eq!(error_accounts.items[0].id, "acct_beta");
+    assert_eq!(error_accounts.items[1].id, "acct_invalid");
     database.close().await;
 }
 
@@ -1210,6 +1271,7 @@ async fn xai_free_quota_exhaustion_state_is_persisted() {
 
     repository
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account_id.clone(),
             expected_revision: CredentialRevision::new(1).expect("credential revision"),
             availability: AccountAvailability::QuotaExhausted,
@@ -1248,6 +1310,7 @@ async fn xai_resettable_usage_limit_state_is_persisted() {
     let observed_at = SystemTime::now();
     repository
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account_id.clone(),
             expected_revision: CredentialRevision::new(1).expect("credential revision"),
             availability: AccountAvailability::Ready,
@@ -1297,6 +1360,7 @@ async fn disabled_account_preserves_user_state_during_refresh_writes() {
 
     repository
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account_id.clone(),
             expected_revision: CredentialRevision::new(1).expect("credential revision"),
             availability: AccountAvailability::Ready,
diff --git a/backend/crates/providers/openai/src/credential/repository.rs b/backend/crates/providers/openai/src/credential/repository.rs
index 9108f7251..4cc2210a4 100644
--- a/backend/crates/providers/openai/src/credential/repository.rs
+++ b/backend/crates/providers/openai/src/credential/repository.rs
@@ -234,6 +234,18 @@ impl CodexCredentialRepository {
         account: &ProviderAccount,
         availability: AccountAvailability,
         observed_at: SystemTime,
+    ) -> Result<(), CredentialRepositoryError> {
+        self.apply_state_with_message(account, availability, observed_at, None)
+            .await
+    }
+
+    /// 带上游错误描述的状态写入；`message` 为 `Some` 时持久化最近错误，恢复 `Ready` 时清空。
+    pub async fn apply_state_with_message(
+        &self,
+        account: &ProviderAccount,
+        availability: AccountAvailability,
+        observed_at: SystemTime,
+        message: Option<String>,
     ) -> Result<(), CredentialRepositoryError> {
         if !account.enabled() {
             return Ok(());
@@ -244,6 +256,7 @@ impl CodexCredentialRepository {
                 expected_revision: account.revision(),
                 availability,
                 observed_at,
+                message,
             })
             .await?;
         Ok(())
diff --git a/backend/crates/providers/openai/src/credential/selector.rs b/backend/crates/providers/openai/src/credential/selector.rs
index e4d4a1446..21b1b29f7 100644
--- a/backend/crates/providers/openai/src/credential/selector.rs
+++ b/backend/crates/providers/openai/src/credential/selector.rs
@@ -685,26 +685,32 @@ impl CodexCredentialSelector {
         &self,
         account: &ProviderAccount,
         failure: CodexAccountFailure,
+        message: Option<String>,
     ) -> Result<(), CredentialSelectionError> {
         let now = SystemTime::now();
         match failure {
             CodexAccountFailure::CredentialExpired => {
-                self.apply_state(account, AccountAvailability::Expired, now)
+                self.apply_state_with_message(account, AccountAvailability::Expired, now, message)
                     .await
             }
             CodexAccountFailure::IdentityVerificationRequired => {
-                self.apply_state(account, AccountAvailability::Invalid, now)
+                self.apply_state_with_message(account, AccountAvailability::Invalid, now, message)
                     .await
             }
             CodexAccountFailure::Banned => {
-                self.apply_state(account, AccountAvailability::Banned, now)
+                self.apply_state_with_message(account, AccountAvailability::Banned, now, message)
                     .await
             }
             // 402：真额度耗尽，由 quota worker 按窗口 reset 自动恢复。
             CodexAccountFailure::QuotaExhausted
             | CodexAccountFailure::UsageLimitExhausted { .. } => {
-                self.apply_state(account, AccountAvailability::QuotaExhausted, now)
-                    .await
+                self.apply_state_with_message(
+                    account,
+                    AccountAvailability::QuotaExhausted,
+                    now,
+                    message,
+                )
+                .await
             }
             // 429：临时限流只写 quota，availability 不改变。
             CodexAccountFailure::RateLimited { retry_after } => {
@@ -727,8 +733,13 @@ impl CodexCredentialSelector {
             CodexAccountFailure::CloudflarePathBlocked => {
                 let blocked = self.record_cloudflare_path_block(account.id(), now);
                 if blocked >= CLOUDFLARE_PATH_BLOCK_THRESHOLD {
-                    self.apply_state(account, AccountAvailability::Invalid, now)
-                        .await?;
+                    self.apply_state_with_message(
+                        account,
+                        AccountAvailability::Invalid,
+                        now,
+                        message,
+                    )
+                    .await?;
                 }
                 self.apply_cookie_recovery(account, CookieRecovery::Clear)
                     .await?;
@@ -737,14 +748,15 @@ impl CodexCredentialSelector {
         }
     }
 
-    async fn apply_state(
+    async fn apply_state_with_message(
         &self,
         account: &ProviderAccount,
         availability: AccountAvailability,
         observed_at: SystemTime,
+        message: Option<String>,
     ) -> Result<(), CredentialSelectionError> {
         self.repository
-            .apply_state(account, availability, observed_at)
+            .apply_state_with_message(account, availability, observed_at, message)
             .await?;
         Ok(())
     }
diff --git a/backend/crates/providers/openai/src/provider.rs b/backend/crates/providers/openai/src/provider.rs
index 342739406..25d36825c 100644
--- a/backend/crates/providers/openai/src/provider.rs
+++ b/backend/crates/providers/openai/src/provider.rs
@@ -1697,6 +1697,8 @@ fn map_selection_error(error: CredentialSelectionError) -> ProviderError {
 struct MappedProviderFailure {
     error: ProviderError,
     account_failure: Option<CodexAccountFailure>,
+    /// 原始上游错误描述，随 availability 状态一并持久化。
+    error_message: Option<String>,
     cyber_policy_failure: bool,
     set_cookie_headers: Vec<String>,
     rate_limit_headers: Vec<(String, String)>,
@@ -1709,6 +1711,7 @@ impl MappedProviderFailure {
         Self {
             error,
             account_failure: None,
+            error_message: None,
             cyber_policy_failure: false,
             set_cookie_headers: Vec::new(),
             rate_limit_headers: Vec::new(),
@@ -1882,7 +1885,7 @@ async fn apply_failure(
             .await;
         if let Err(error) = context
             .selector
-            .record_failure(account, account_failure)
+            .record_failure(account, account_failure, failure.error_message.clone())
             .await
         {
             tracing::warn!(
@@ -2162,6 +2165,7 @@ fn map_upstream_failure(
     MappedProviderFailure {
         error,
         account_failure: account_failure(category, failure.retry_after_seconds),
+        error_message: failure.client_message,
         cyber_policy_failure,
         set_cookie_headers: failure.set_cookie_headers,
         rate_limit_headers: failure.rate_limit_headers,
diff --git a/backend/crates/providers/openai/tests/admin.rs b/backend/crates/providers/openai/tests/admin.rs
index 3042048fd..21d5b6294 100644
--- a/backend/crates/providers/openai/tests/admin.rs
+++ b/backend/crates/providers/openai/tests/admin.rs
@@ -544,6 +544,7 @@ async fn openai_admin_projects_confirmed_quota_exhaustion_as_full_without_mutati
         .expect("persist raw quota");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: CoreAccountAvailability::QuotaExhausted,
@@ -584,6 +585,7 @@ async fn openai_admin_projects_confirmed_quota_exhaustion_as_full_without_mutati
 
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: CoreAccountAvailability::Ready,
@@ -711,6 +713,7 @@ fn account_record(account: &ProviderAccount) -> AccountRecord {
         enabled: account.enabled(),
         availability: AdminAccountAvailability::Ready,
         availability_observed_at: now,
+        last_error_message: None,
         quota_observed_at: None,
         created_at: now,
         updated_at: now,
diff --git a/backend/crates/providers/openai/tests/credential/contract.rs b/backend/crates/providers/openai/tests/credential/contract.rs
index e60bef372..b5411aace 100644
--- a/backend/crates/providers/openai/tests/credential/contract.rs
+++ b/backend/crates/providers/openai/tests/credential/contract.rs
@@ -507,6 +507,7 @@ async fn selector_should_escape_a_quota_exhausted_affinity_account() {
     let first = store.account("acct_first").expect("first account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: first.id().clone(),
             expected_revision: first.revision(),
             availability: AccountAvailability::QuotaExhausted,
@@ -663,8 +664,12 @@ fn credential_expired_failure_marks_unified_account_expired() {
             }),
         )
         .expect("select account");
-    block_on(selector.record_failure(lease.account(), CodexAccountFailure::CredentialExpired))
-        .expect("record credential expiry");
+    block_on(selector.record_failure(
+        lease.account(),
+        CodexAccountFailure::CredentialExpired,
+        None,
+    ))
+    .expect("record credential expiry");
     assert_eq!(
         store
             .account("acct_primary")
@@ -697,6 +702,7 @@ fn rate_limited_failure_records_quota_window_without_changing_availability() {
         CodexAccountFailure::RateLimited {
             retry_after: Some(Duration::from_secs(30)),
         },
+        None,
     ))
     .expect("record rate-limit failure");
 
@@ -743,6 +749,7 @@ async fn usage_limit_exhaustion_marks_quota_exhausted_without_usage_probe() {
             CodexAccountFailure::UsageLimitExhausted {
                 retry_after: Some(Duration::from_secs(30)),
             },
+            None,
         )
         .await
         .expect("record usage-limit exhaustion");
@@ -758,6 +765,7 @@ fn rate_limited_failure_does_not_downgrade_persisted_quota_exhaustion() {
     create_account(&store, "acct_primary", "at-primary");
     let account = store.account("acct_primary").expect("account");
     block_on(store.apply_state_change(AccountStateChange {
+        message: None,
         account_id: account.id().clone(),
         expected_revision: account.revision(),
         availability: AccountAvailability::QuotaExhausted,
@@ -771,6 +779,7 @@ fn rate_limited_failure_does_not_downgrade_persisted_quota_exhaustion() {
         CodexAccountFailure::RateLimited {
             retry_after: Some(Duration::from_secs(30)),
         },
+        None,
     ))
     .expect("record rate-limit failure");
 
@@ -796,6 +805,7 @@ fn rate_limited_failure_does_not_consult_stale_quota_snapshot() {
         CodexAccountFailure::RateLimited {
             retry_after: Some(Duration::from_secs(30)),
         },
+        None,
     ))
     .expect("record rate-limit failure");
 
@@ -816,6 +826,7 @@ fn rate_limited_failure_does_not_overwrite_stale_authentication_state() {
     create_account(&store, "acct_primary", "at-primary");
     let account = store.account("acct_primary").expect("account");
     block_on(store.apply_state_change(AccountStateChange {
+        message: None,
         account_id: account.id().clone(),
         expected_revision: account.revision(),
         availability: AccountAvailability::Invalid,
@@ -830,6 +841,7 @@ fn rate_limited_failure_does_not_overwrite_stale_authentication_state() {
         CodexAccountFailure::RateLimited {
             retry_after: Some(Duration::from_secs(30)),
         },
+        None,
     ))
     .expect("record rate-limit failure");
 
@@ -854,6 +866,7 @@ fn successful_upstream_response_recovers_non_quota_terminal_states() {
         create_account(&store, "acct_primary", "at-primary");
         let account = store.account("acct_primary").expect("account");
         block_on(store.apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: stale,
@@ -892,12 +905,14 @@ fn rate_limited_failures_for_distinct_accounts_do_not_conflict() {
                 CodexAccountFailure::RateLimited {
                     retry_after: Some(Duration::from_secs(30)),
                 },
+                None,
             ),
             selector.record_failure(
                 &second,
                 CodexAccountFailure::RateLimited {
                     retry_after: Some(Duration::from_secs(30)),
                 },
+                None,
             ),
         );
         first_result.expect("record first account failure");
@@ -925,7 +940,7 @@ fn selector_keeps_a_quota_exhausted_account_eligible_when_configured_not_to_skip
     create_account(&store, "acct_primary", "at-primary");
     let strict_selector = selector(&store, Arc::new(TestLeaseCoordinator::default()));
     let account = store.account("acct_primary").expect("account");
-    block_on(strict_selector.record_failure(&account, CodexAccountFailure::QuotaExhausted))
+    block_on(strict_selector.record_failure(&account, CodexAccountFailure::QuotaExhausted, None))
         .expect("mark account exhausted");
 
     let selector = selector_with_runtime(
@@ -979,6 +994,7 @@ fn identity_verification_failure_isolates_only_selected_account() {
     block_on(selector.record_failure(
         lease.account(),
         CodexAccountFailure::IdentityVerificationRequired,
+        None,
     ))
     .expect("record identity verification failure");
 
@@ -1022,6 +1038,7 @@ fn cloudflare_challenge_does_not_change_availability() {
     block_on(selector.record_failure(
         lease.account(),
         CodexAccountFailure::CloudflareChallenge { retry_after: None },
+        None,
     ))
     .expect("record challenge");
 
@@ -1058,9 +1075,11 @@ fn repeated_cloudflare_path_block_marks_only_the_affected_account_invalid() {
         .expect("select account");
 
     for _ in 0..3 {
-        block_on(
-            selector.record_failure(lease.account(), CodexAccountFailure::CloudflarePathBlocked),
-        )
+        block_on(selector.record_failure(
+            lease.account(),
+            CodexAccountFailure::CloudflarePathBlocked,
+            None,
+        ))
         .expect("record path block");
     }
 
@@ -1114,6 +1133,7 @@ fn cloudflare_challenge_expires_provider_owned_cookies_at_cooldown_boundary() {
     block_on(selector.record_failure(
         second.account(),
         CodexAccountFailure::CloudflareChallenge { retry_after: None },
+        None,
     ))
     .expect("record challenge");
 
@@ -1157,8 +1177,12 @@ fn cloudflare_path_block_deletes_provider_owned_cookies() {
         session_affinity_key: None,
     }))
     .expect("select revised account");
-    block_on(selector.record_failure(second.account(), CodexAccountFailure::CloudflarePathBlocked))
-        .expect("record path block");
+    block_on(selector.record_failure(
+        second.account(),
+        CodexAccountFailure::CloudflarePathBlocked,
+        None,
+    ))
+    .expect("record path block");
 
     let account = store.account("acct_primary").expect("account");
     let data = block_on(store.repository().load_complete_data(&account)).expect("credential data");
@@ -1194,7 +1218,7 @@ fn response_cookie_rotation_returns_a_current_account_for_later_fenced_writes()
 
     assert_eq!(outcome.credential_revision, Some(current.revision().get()));
     assert_ne!(current.revision(), lease.account().revision());
-    block_on(selector.record_failure(&current, CodexAccountFailure::QuotaExhausted))
+    block_on(selector.record_failure(&current, CodexAccountFailure::QuotaExhausted, None))
         .expect("record failure with current revision");
     assert_eq!(
         store
diff --git a/backend/crates/providers/openai/tests/credential/quota/mod.rs b/backend/crates/providers/openai/tests/credential/quota/mod.rs
index cf8da5ae2..f68ec019f 100644
--- a/backend/crates/providers/openai/tests/credential/quota/mod.rs
+++ b/backend/crates/providers/openai/tests/credential/quota/mod.rs
@@ -235,6 +235,7 @@ async fn manual_quota_refresh_preserves_disabled_account_state() {
     let account = store.account(account_id).expect("created disabled account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::Expired,
@@ -288,6 +289,7 @@ async fn manual_quota_auth_rejection_does_not_invalidate_refreshable_credential(
     let account = store.account(account_id).expect("created account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::QuotaExhausted,
@@ -494,6 +496,7 @@ async fn periodic_quota_synchronization_preserves_availability_when_usage_peaks(
     let reset_at = Utc::now().timestamp() + 24 * 60 * 60;
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::Ready,
@@ -560,6 +563,7 @@ async fn periodic_quota_synchronization_does_not_downgrade_exhaustion_on_rate_li
         .expect("created account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::QuotaExhausted,
@@ -599,6 +603,7 @@ async fn periodic_quota_synchronization_respects_retry_after_on_service_unavaila
         .expect("created account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::QuotaExhausted,
@@ -639,6 +644,7 @@ async fn periodic_quota_synchronization_skips_ready_accounts_without_quota_reach
         .expect("created account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::Ready,
@@ -671,6 +677,7 @@ async fn periodic_quota_synchronization_attempts_quota_exhausted_accounts() {
         .expect("created account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::QuotaExhausted,
@@ -696,6 +703,7 @@ async fn periodic_quota_synchronization_rechecks_exhausted_accounts_without_wait
         .expect("created account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::QuotaExhausted,
@@ -761,6 +769,7 @@ async fn periodic_quota_synchronization_does_not_recover_from_percent_drop_befor
         .expect("seed post-failure quota snapshot");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::QuotaExhausted,
@@ -851,6 +860,7 @@ async fn periodic_quota_synchronization_recovers_after_recorded_reset() {
     let account = store.account(account_id).expect("created account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::QuotaExhausted,
@@ -900,6 +910,7 @@ async fn periodic_quota_synchronization_throttles_the_same_exhausted_account() {
         .expect("created account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::QuotaExhausted,
@@ -923,6 +934,7 @@ async fn periodic_quota_synchronization_does_not_bypass_throttle_for_a_new_reset
     let account = store.account(account_id).expect("created account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::QuotaExhausted,
@@ -977,6 +989,7 @@ async fn invalid_quota_json_for_one_account_does_not_abort_the_batch() {
         let account = store.account(account_id).expect("created account");
         store
             .apply_state_change(AccountStateChange {
+                message: None,
                 account_id: account.id().clone(),
                 expected_revision: account.revision(),
                 availability: AccountAvailability::QuotaExhausted,
diff --git a/backend/crates/providers/openai/tests/credential/quota/recovery.rs b/backend/crates/providers/openai/tests/credential/quota/recovery.rs
index c1826b1b8..663a44da4 100644
--- a/backend/crates/providers/openai/tests/credential/quota/recovery.rs
+++ b/backend/crates/providers/openai/tests/credential/quota/recovery.rs
@@ -12,6 +12,7 @@ async fn manual_quota_refresh_keeps_confirmed_exhaustion_until_the_recorded_rese
     let account = store.account(account_id).expect("created account");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::Expired,
@@ -161,6 +162,7 @@ async fn expired_old_reset_with_fresh_allowed_snapshot_recovers_ready() {
         .expect("seed old exhausted snapshot");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: account.id().clone(),
             expected_revision: account.revision(),
             availability: AccountAvailability::QuotaExhausted,
diff --git a/backend/crates/providers/xai/src/credential/repository.rs b/backend/crates/providers/xai/src/credential/repository.rs
index 413d02b87..28e8c74ac 100644
--- a/backend/crates/providers/xai/src/credential/repository.rs
+++ b/backend/crates/providers/xai/src/credential/repository.rs
@@ -436,6 +436,7 @@ impl GrokCredentialRepository {
                 expected_revision: input.expected_revision,
                 availability: input.availability.into(),
                 observed_at: to_system_time(input.observed_at),
+                message: input.availability_reason.clone(),
             })
             .await
             .map_err(map_store_error)
diff --git a/backend/crates/providers/xai/tests/admin.rs b/backend/crates/providers/xai/tests/admin.rs
index 8064f79d3..d82ee12a6 100644
--- a/backend/crates/providers/xai/tests/admin.rs
+++ b/backend/crates/providers/xai/tests/admin.rs
@@ -473,6 +473,7 @@ fn account_record(account: &ProviderAccount) -> AccountRecord {
         enabled: account.enabled(),
         availability: account.availability(),
         availability_observed_at: now,
+        last_error_message: None,
         quota_observed_at: None,
         created_at: now,
         updated_at: now,
diff --git a/backend/crates/providers/xai/tests/credential/catalog.rs b/backend/crates/providers/xai/tests/credential/catalog.rs
index 460f5c604..6d0ba6290 100644
--- a/backend/crates/providers/xai/tests/credential/catalog.rs
+++ b/backend/crates/providers/xai/tests/credential/catalog.rs
@@ -204,6 +204,7 @@ async fn set_account_state(
 ) {
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: id.clone(),
             expected_revision: CredentialRevision::new(1).expect("revision"),
             availability,
@@ -485,6 +486,7 @@ async fn quota_exhausted_account_remains_eligible_for_catalog_discovery() {
     let id = account_id("quota-exhausted");
     store
         .apply_state_change(AccountStateChange {
+            message: None,
             account_id: id,
             expected_revision: CredentialRevision::new(1).expect("revision"),
             availability: AccountAvailability::QuotaExhausted,
@@ -755,6 +757,7 @@ async fn quota_refresh_preserves_ready_availability_across_concurrent_state_writ
     let transport = Arc::new(MutatingBillingTransport {
         store: Arc::clone(&store),
         mutation: Mutex::new(Some(BillingMutation::State(AccountStateChange {
+            message: None,
             account_id: id.clone(),
             expected_revision: CredentialRevision::new(1).expect("revision"),
             availability: AccountAvailability::Ready,
diff --git a/backend/migrations/.frozen-sha256 b/backend/migrations/.frozen-sha256
index c0e2f59c6..1c38e73b2 100644
--- a/backend/migrations/.frozen-sha256
+++ b/backend/migrations/.frozen-sha256
@@ -1 +1 @@
-609d455f410f7be362bcdce841630728aaf2681f5cd6b2a6012529e5f8b8b1f6  0001_initial.sql
+5f79e74c9a7a7366c39cd1afe43175eff6c44afe9217c0f26f33f173bd40c781  0001_initial.sql
diff --git a/backend/migrations/0001_initial.sql b/backend/migrations/0001_initial.sql
index 827575831..67c60813e 100644
--- a/backend/migrations/0001_initial.sql
+++ b/backend/migrations/0001_initial.sql
@@ -133,6 +133,7 @@ create table provider_accounts (
   availability text not null default 'unknown',
   provider_quota_json jsonb,
   quota_limit_reached boolean not null default false,
+  last_error_message text,
   availability_observed_at timestamptz not null,
   quota_observed_at timestamptz,
   created_at timestamptz not null,
diff --git a/frontend/src/api/modules/accounts.ts b/frontend/src/api/modules/accounts.ts
index 808e60e58..96aebc2f0 100644
--- a/frontend/src/api/modules/accounts.ts
+++ b/frontend/src/api/modules/accounts.ts
@@ -104,6 +104,8 @@ export interface Account {
   hasRefreshToken: boolean
   status: string
   displayStatus: string
+  errorReason: string | null
+  errorMessage: string | null
   availability: string
   enabled: boolean
   accessTokenExpiresAt: string | null
@@ -127,10 +129,11 @@ export interface AccountPageMeta {
 
 export interface AccountSummary {
   total: number
-  active: number
+  normal: number
   quotaExhausted: number
   rateLimited: number
-  unavailable: number
+  disabled: number
+  error: number
 }
 
 export interface AccountListResponse {
diff --git a/frontend/src/views/accounts/components/AccountConnectionTestModal.vue b/frontend/src/views/accounts/components/AccountConnectionTestModal.vue
index 4ced4bb5b..659de9417 100644
--- a/frontend/src/views/accounts/components/AccountConnectionTestModal.vue
+++ b/frontend/src/views/accounts/components/AccountConnectionTestModal.vue
@@ -57,7 +57,12 @@ function connectionLogClass(tone: string) {
         class="flex items-center justify-between gap-4 rounded-(--cp-card-radius) bg-(--cp-bg-subtle) px-4 py-3"
       >
         <AccountIdentityCell :account="account" size="lg" show-plan />
-        <AccountStatusBadge :status="account.status" variant="pill" />
+        <AccountStatusBadge
+          :status="account.status"
+          :error-reason="account.errorReason"
+          :error-message="account.errorMessage"
+          variant="pill"
+        />
       </section>
 
       <section class="rounded-(--cp-card-radius) bg-(--cp-bg-subtle) px-4 py-3">
diff --git a/frontend/src/views/accounts/components/AccountOverviewCards.vue b/frontend/src/views/accounts/components/AccountOverviewCards.vue
index 0708312db..cc53d21d8 100644
--- a/frontend/src/views/accounts/components/AccountOverviewCards.vue
+++ b/frontend/src/views/accounts/components/AccountOverviewCards.vue
@@ -20,7 +20,7 @@ const overviewItems = computed(() => [
   },
   {
     label: '正常账号',
-    value: formatCount(props.summary.active),
+    value: formatCount(props.summary.normal),
     caption: '可参与调度',
     tone: 'success',
     icon: ShieldCheck,
@@ -33,9 +33,9 @@ const overviewItems = computed(() => [
     icon: Gauge,
   },
   {
-    label: '异常账号',
-    value: formatCount(props.summary.unavailable),
-    caption: '过期 / 失效 / 禁用 / 封禁',
+    label: '待处理',
+    value: formatCount((props.summary.disabled ?? 0) + (props.summary.error ?? 0)),
+    caption: '已停用 / 错误',
     tone: 'danger',
     icon: AlertTriangle,
   },
diff --git a/frontend/src/views/accounts/components/AccountStatusBadge.vue b/frontend/src/views/accounts/components/AccountStatusBadge.vue
index b35c3ec1c..c8b395935 100644
--- a/frontend/src/views/accounts/components/AccountStatusBadge.vue
+++ b/frontend/src/views/accounts/components/AccountStatusBadge.vue
@@ -1,20 +1,36 @@
 <script setup lang="ts">
 import { computed } from 'vue'
 
-import { statusLabels, statusTones } from '../constants'
+import BasePopover from '@/components/base/BasePopover.vue'
+import { errorReasonLabels, statusLabels, statusTones } from '../constants'
 
 const props = withDefaults(
   defineProps<{
     status: string
+    /** `status === 'error'` 时的具体原因（对应后端 `errorReason`）。 */
+    errorReason?: string | null
+    /** 最近一次失败的上游错误原文（对应后端 `errorMessage`），作为辅助证据展示。 */
+    errorMessage?: string | null
     variant?: 'inline' | 'pill'
   }>(),
   {
+    errorReason: null,
+    errorMessage: null,
     variant: 'inline',
   },
 )
 
 const tone = computed(() => statusTones[props.status])
 const label = computed(() => statusLabels[props.status] || props.status)
+/** 分类原因（受控枚举映射文案）；`status === 'error'` 时有值。 */
+const reasonLabel = computed(() => {
+  if (props.errorReason)
+    return errorReasonLabels[props.errorReason] || props.errorReason
+  return null
+})
+/** 上游错误原文（辅助证据）；有则显、无则隐。 */
+const errorText = computed(() => props.errorMessage || null)
+const hasDetail = computed(() => Boolean(reasonLabel.value) || Boolean(errorText.value))
 
 const textClass = computed(() => {
   if (tone.value === 'success') {
@@ -50,19 +66,35 @@ const dotClass = computed(() => {
 </script>
 
 <template>
-  <span
-    v-if="variant === 'pill'"
-    class="inline-flex h-7 shrink-0 items-center rounded-full px-2.5 text-[12px] font-heavy"
-    :class="textClass"
+  <BasePopover
+    :disabled="!hasDetail"
+    trigger="hover"
+    placement="top-start"
+    :width="240"
+    panel-class="p-2"
   >
-    {{ label }}
-  </span>
-  <span
-    v-else
-    class="inline-flex min-w-16 items-center gap-1.5 text-[12px] leading-none font-emphasis"
-    :class="textClass"
-  >
-    <span class="size-1.5 rounded-full" :class="dotClass" />
-    <span>{{ label }}</span>
-  </span>
+    <template #trigger>
+      <span
+        v-if="variant === 'pill'"
+        class="inline-flex h-7 shrink-0 items-center rounded-full px-2.5 text-[12px] font-heavy"
+        :class="textClass"
+      >
+        {{ label }}
+      </span>
+      <span
+        v-else
+        class="inline-flex min-w-16 items-center gap-1.5 text-[12px] leading-none font-emphasis"
+        :class="textClass"
+      >
+        <span class="size-1.5 rounded-full" :class="dotClass" />
+        <span>{{ label }}</span>
+      </span>
+    </template>
+    <p v-if="reasonLabel" class="m-0 text-[12px] font-medium leading-relaxed text-(--cp-text-primary)">
+      {{ reasonLabel }}
+    </p>
+    <p v-if="errorText" class="m-0 mt-1 text-[12px] leading-relaxed text-(--cp-text-secondary)">
+      {{ errorText }}
+    </p>
+  </BasePopover>
 </template>
diff --git a/frontend/src/views/accounts/components/AccountTableActions.vue b/frontend/src/views/accounts/components/AccountTableActions.vue
index 5feb45f09..6a3285025 100644
--- a/frontend/src/views/accounts/components/AccountTableActions.vue
+++ b/frontend/src/views/accounts/components/AccountTableActions.vue
@@ -26,7 +26,7 @@ const emit = defineEmits<{
 const canRefreshToken = computed(
   () =>
     props.account.hasRefreshToken
-    && (props.account.status === 'active' || props.account.status === 'quota_exhausted'),
+    && (props.account.status === 'normal' || props.account.status === 'quota_exhausted'),
 )
 const canReauthorize = computed(() => props.account.provider === 'openai')
 </script>
diff --git a/frontend/src/views/accounts/composables/useAccountMutations.ts b/frontend/src/views/accounts/composables/useAccountMutations.ts
index cc9851193..db124eb75 100644
--- a/frontend/src/views/accounts/composables/useAccountMutations.ts
+++ b/frontend/src/views/accounts/composables/useAccountMutations.ts
@@ -24,13 +24,11 @@ import { useAccountOnboarding } from './useAccountOnboarding'
 type AccountRow = Awaited<ReturnType<typeof getAccounts>>['items'][number]
 
 const accountStatusSortRank: Record<string, number> = {
-  active: 0,
+  normal: 0,
   quota_exhausted: 1,
   rate_limited: 2,
-  expired: 3,
-  invalid: 4,
-  disabled: 5,
-  banned: 6,
+  disabled: 3,
+  error: 4,
 }
 
 export function useAccountMutations(options: {
@@ -234,11 +232,11 @@ export function useAccountMutations(options: {
       return
     options.accountSummary.value = {
       ...options.accountSummary.value,
-      active: Math.max(
+      normal: Math.max(
         0,
-        options.accountSummary.value.active
-        + Number(status === 'active')
-        - Number(current.status === 'active'),
+        options.accountSummary.value.normal
+        + Number(status === 'normal')
+        - Number(current.status === 'normal'),
       ),
       quotaExhausted: Math.max(
         0,
@@ -252,22 +250,21 @@ export function useAccountMutations(options: {
         + Number(status === 'rate_limited')
         - Number(current.status === 'rate_limited'),
       ),
-      unavailable: Math.max(
+      disabled: Math.max(
         0,
-        options.accountSummary.value.unavailable
-        + Number(isUnavailableAccountStatus(status))
-        - Number(isUnavailableAccountStatus(current.status)),
+        options.accountSummary.value.disabled
+        + Number(status === 'disabled')
+        - Number(current.status === 'disabled'),
+      ),
+      error: Math.max(
+        0,
+        options.accountSummary.value.error
+        + Number(status === 'error')
+        - Number(current.status === 'error'),
       ),
     }
   }
 
-  function isUnavailableAccountStatus(status: string) {
-    return status === 'expired'
-      || status === 'invalid'
-      || status === 'disabled'
-      || status === 'banned'
-  }
-
   function sortAccountsByStatus(rows: AccountRow[]) {
     if (options.sort.value?.key !== 'status')
       return rows
diff --git a/frontend/src/views/accounts/composables/useAccountsQuery.ts b/frontend/src/views/accounts/composables/useAccountsQuery.ts
index 2a10db2b4..7c94e63db 100644
--- a/frontend/src/views/accounts/composables/useAccountsQuery.ts
+++ b/frontend/src/views/accounts/composables/useAccountsQuery.ts
@@ -14,10 +14,11 @@ export function useAccountsQuery() {
   const sort = shallowRef<BaseTableSort>()
   const accountSummary = shallowRef({
     total: 0,
-    active: 0,
+    normal: 0,
     quotaExhausted: 0,
     rateLimited: 0,
-    unavailable: 0,
+    disabled: 0,
+    error: 0,
   })
 
   const query = usePagedQuery({
diff --git a/frontend/src/views/accounts/constants.ts b/frontend/src/views/accounts/constants.ts
index 1b581989c..9caa34512 100644
--- a/frontend/src/views/accounts/constants.ts
+++ b/frontend/src/views/accounts/constants.ts
@@ -123,38 +123,41 @@ export const accountColumns = [
 ] satisfies BaseTableColumn<AccountRow>[]
 
 export const statusLabels: Record<string, string> = {
-  active: '正常',
-  expired: '已过期',
-  invalid: '失效',
-  disabled: '已禁用',
-  banned: '已封禁',
+  normal: '正常',
   quota_exhausted: '配额耗尽',
   rate_limited: '限流中',
+  disabled: '已停用',
+  error: '错误',
 }
 
 export const statusTones: Record<string, 'success' | 'danger' | 'warning' | 'info' | 'normal'> = {
-  active: 'success',
-  expired: 'warning',
-  invalid: 'warning',
-  disabled: 'normal',
-  banned: 'danger',
+  normal: 'success',
   quota_exhausted: 'warning',
   rate_limited: 'warning',
+  disabled: 'normal',
+  error: 'danger',
 }
 
 export const accountStatusFilterOptions = [
   { label: '全部状态', value: '' },
-  { label: statusLabels.active, value: 'active' },
+  { label: statusLabels.normal, value: 'normal' },
   { label: statusLabels.quota_exhausted, value: 'quota_exhausted' },
   { label: statusLabels.rate_limited, value: 'rate_limited' },
-  { label: statusLabels.expired, value: 'expired' },
-  { label: statusLabels.invalid, value: 'invalid' },
   { label: statusLabels.disabled, value: 'disabled' },
-  { label: statusLabels.banned, value: 'banned' },
+  { label: statusLabels.error, value: 'error' },
 ]
 
+/** `error` 分类下具体原因的展示文案（对应后端 `errorReason`）。 */
+export const errorReasonLabels: Record<string, string> = {
+  expired: '账号已过期',
+  token_expired: '访问令牌已过期',
+  invalid: '凭据已失效',
+  banned: '账号已封禁',
+  unknown: '状态未知',
+}
+
 /**
- * 后端已派生互斥状态（含 `rate_limited`，由快照级 quota.limitReached 产生）；
+ * 后端已派生互斥状态（正常 / 配额耗尽 / 限流中 / 已停用 / 错误）；
  * 前端只渲染，不再独立派生。
  */
 export function derivedAccountStatus(row: AccountRow): string {
diff --git a/frontend/src/views/accounts/index.vue b/frontend/src/views/accounts/index.vue
index 0e39fb13b..8fc8f72f7 100644
--- a/frontend/src/views/accounts/index.vue
+++ b/frontend/src/views/accounts/index.vue
@@ -202,7 +202,11 @@ const {
           </template>
 
           <template #status="{ row }">
-            <AccountStatusBadge :status="derivedAccountStatus(row)" />
+            <AccountStatusBadge
+              :status="derivedAccountStatus(row)"
+              :error-reason="row.errorReason"
+              :error-message="row.errorMessage"
+            />
           </template>
 
           <template #planType="{ row }">