diff --git a/src/i18n/ja.ts b/src/i18n/ja.ts
index 25e17be..4f80eb7 100644
--- a/src/i18n/ja.ts
+++ b/src/i18n/ja.ts
@@ -1824,6 +1824,7 @@ export const jaOverrides = {
   'management.notConfigured': '未設定',
   'management.error.upstream': '上流リクエストに失敗しました',
   'management.error.upstreamHttp': '上流が HTTP {status} を返しました',
+  'management.error.upstreamHttpDetail': 'HTTP {status}: {message}',
   'model.error.invalidBaseUrl': 'Base URL が無効です。https://api.example.com のような URL を入力してください',
   'model.error.unsupportedBaseUrl': 'Base URL は http:// または https:// のみ使用できます',
   'model.error.baseUrlRequired': '先に Base URL を入力してください',
diff --git a/src/i18n/locales/en.ts b/src/i18n/locales/en.ts
index b673ba1..ce535ff 100644
--- a/src/i18n/locales/en.ts
+++ b/src/i18n/locales/en.ts
@@ -1824,6 +1824,7 @@ export const en: Record<MessageKey, string> = {
   'management.notConfigured': 'Not configured',
   'management.error.upstream': 'Upstream request failed',
   'management.error.upstreamHttp': 'Upstream returned HTTP {status}',
+  'management.error.upstreamHttpDetail': 'HTTP {status}: {message}',
   'model.error.invalidBaseUrl': 'Base URL is invalid. Enter a URL such as https://api.example.com',
   'model.error.unsupportedBaseUrl': 'Base URL must use http:// or https://',
   'model.error.baseUrlRequired': 'Enter a Base URL first',
diff --git a/src/i18n/locales/zh-CN.ts b/src/i18n/locales/zh-CN.ts
index 4bb88db..9b275e0 100644
--- a/src/i18n/locales/zh-CN.ts
+++ b/src/i18n/locales/zh-CN.ts
@@ -1823,6 +1823,7 @@ export const zhCN = {
   'management.notConfigured': '未配置',
   'management.error.upstream': '上游请求失败',
   'management.error.upstreamHttp': '上游返回 HTTP {status}',
+  'management.error.upstreamHttpDetail': 'HTTP {status}：{message}',
   'model.error.invalidBaseUrl': 'Base URL 不是有效地址，请输入类似 https://api.example.com 的 URL',
   'model.error.unsupportedBaseUrl': 'Base URL 只支持 http:// 或 https:// 地址',
   'model.error.baseUrlRequired': '请先输入 Base URL',
diff --git a/src/services/managementApi.ts b/src/services/managementApi.ts
index 7d5a386..bd73208 100644
--- a/src/services/managementApi.ts
+++ b/src/services/managementApi.ts
@@ -180,44 +180,93 @@ export function normalizeAuthIndex(value: unknown): string {
   return typeof value === 'string' || typeof value === 'number' ? String(value).trim() : '';
 }
 
-const messageFromPayload = (value: unknown, depth = 0): string => {
-  if (value === null || value === undefined || depth > 3) return '';
-  if (typeof value === 'string') {
-    const text = value.trim();
-    if (!text) return '';
-    try {
-      const parsed = JSON.parse(text) as unknown;
-      const nested = messageFromPayload(parsed, depth + 1);
-      if (nested) return nested;
-    } catch {
-    }
-    return text;
-  }
-  if (typeof value === 'number' || typeof value === 'boolean') return String(value);
-  if (Array.isArray(value)) {
-    for (const item of value) {
-      const nested = messageFromPayload(item, depth + 1);
-      if (nested) return nested;
-    }
-    return '';
-  }
-  if (isRecord(value)) {
-    for (const key of ['message', 'error', 'detail', 'error_description', 'title']) {
-      const nested = messageFromPayload(value[key], depth + 1);
-      if (nested) return nested;
+type ApiErrorDetail = { message: string; code: string };
+
+const emptyApiErrorDetail = (): ApiErrorDetail => ({ message: '', code: '' });
+
+const mergeApiErrorDetail = (current: ApiErrorDetail, next: ApiErrorDetail): ApiErrorDetail => ({
+  message: current.message || next.message,
+  code: current.code || next.code,
+});
+
+const errorCodeFromRecord = (value: Record<string, unknown>): string => {
+  for (const key of ['code', 'error_code', 'errorCode']) {
+    const candidate = value[key];
+    if (typeof candidate === 'number' && Number.isFinite(candidate)) return String(Math.trunc(candidate));
+    if (typeof candidate === 'string') {
+      const text = candidate.trim();
+      if (text && text.length <= 64) return text;
     }
   }
   return '';
 };
 
+const detailFromPayload = (value: unknown, depth = 0): ApiErrorDetail => {
+  if (value === null || value === undefined || depth > 3) return emptyApiErrorDetail();
+  if (typeof value === 'string') {
+    const text = value.trim();
+    if (!text) return emptyApiErrorDetail();
+    try {
+      const parsed = JSON.parse(text) as unknown;
+      const nested = detailFromPayload(parsed, depth + 1);
+      if (nested.message || nested.code) return nested;
+    } catch {
+    }
+    return { message: text, code: '' };
+  }
+  if (typeof value === 'number' || typeof value === 'boolean') return { message: String(value), code: '' };
+  if (Array.isArray(value)) {
+    let detail = emptyApiErrorDetail();
+    for (const item of value) {
+      detail = mergeApiErrorDetail(detail, detailFromPayload(item, depth + 1));
+      if (detail.message && detail.code) break;
+    }
+    return detail;
+  }
+  if (isRecord(value)) {
+    let detail: ApiErrorDetail = { message: '', code: errorCodeFromRecord(value) };
+    for (const key of ['message', 'error', 'detail', 'error_description', 'title']) {
+      detail = mergeApiErrorDetail(detail, detailFromPayload(value[key], depth + 1));
+      if (detail.message && detail.code) break;
+    }
+    return detail;
+  }
+  return emptyApiErrorDetail();
+};
+
+const httpStatusFromResponse = (response: Record<string, unknown>): number => {
+  const status = Number(response.status_code ?? response.statusCode ?? response.status ?? 0);
+  return Number.isFinite(status) && status > 0 ? Math.trunc(status) : 0;
+};
+
+const mentionsHttpStatus = (text: string, status: number): boolean => {
+  if (!status) return false;
+  if (text.trim() === String(status)) return true;
+  return new RegExp(`(?:\\bhttp\\s*|\\(|\\[|^|\\s)${status}(?:\\b|\\)|\\]|\\s|$)`, 'i').test(text);
+};
+
 export function apiCallErrorMessage(
   response: Record<string, unknown>,
   fallback = translate(getCurrentLocale(), 'management.error.upstream'),
 ): string {
-  const status = Number(response.status_code ?? response.statusCode ?? 0);
-  const message = messageFromPayload(response.body ?? response.bodyText);
-  if (message) return message;
+  const locale = getCurrentLocale();
+  const status = httpStatusFromResponse(response);
+  const detail = detailFromPayload(response.body ?? response.bodyText);
+  const message = status > 0 && detail.message.trim() === String(status) ? '' : detail.message;
+  const code = detail.code.trim();
+  const showCode = Boolean(
+    code
+    && code !== String(status)
+    && code.toLowerCase() !== message.toLowerCase()
+    && !message.toLowerCase().includes(code.toLowerCase()),
+  );
+  const text = message ? (showCode ? `${message} (${code})` : message) : code;
+  const httpError = status > 0 && (status < 200 || status >= 300);
+  if (httpError && text && !mentionsHttpStatus(text, status)) {
+    return translate(locale, 'management.error.upstreamHttpDetail', { status, message: text });
+  }
+  if (text) return text;
   return status > 0
-    ? translate(getCurrentLocale(), 'management.error.upstreamHttp', { status })
+    ? translate(locale, 'management.error.upstreamHttp', { status })
     : fallback;
 }
diff --git a/src/styles/usage-subpages.css b/src/styles/usage-subpages.css
index 4bd9884..8763b47 100644
--- a/src/styles/usage-subpages.css
+++ b/src/styles/usage-subpages.css
@@ -122,15 +122,90 @@
   padding: 0 20px 0 0;
 }
 
-/* The default event view is intentionally compact; secondary diagnostics remain available via tooltips and Columns. */
+/* Request log reads as separate rounded cards, matching the reference layout. */
+.usage-records-page .usage-request-log {
+  --usage-log-canvas: transparent;
+  gap: 10px;
+  padding: 0;
+  border: 0;
+  border-radius: 0;
+  background: transparent;
+  box-shadow: none;
+}
+
+.usage-records-page .usage-request-log .usage-table-wrap,
+.usage-records-page .usage-request-log .usage-table-top-scrollbar {
+  background: transparent;
+}
+
+.usage-records-page .usage-request-log .usage-events-table {
+  border-collapse: separate;
+  border-spacing: 0 10px;
+  margin-top: -10px;
+}
+
 .usage-records-page .usage-request-log .usage-events-table th,
 .usage-records-page .usage-request-log .usage-events-table th .usage-th-content {
-  height: 38px;
+  height: 44px;
+}
+
+.usage-records-page .usage-request-log .usage-events-table th {
+  position: sticky;
+  top: 0;
+  border: 0;
+  background: #fff;
+  color: #8b97a8;
+  font-size: 12px;
+  font-weight: 650;
+  letter-spacing: .01em;
+  box-shadow: none;
+}
+
+.usage-records-page .usage-request-log .usage-events-table th .usage-th-content {
+  padding: 0 16px;
+}
+
+.usage-records-page .usage-request-log .usage-events-table thead th:first-child {
+  border-radius: 14px 0 0 14px;
+}
+
+.usage-records-page .usage-request-log .usage-events-table thead th:last-child {
+  border-radius: 0 14px 14px 0;
 }
 
 .usage-records-page .usage-request-log .usage-events-table td {
-  height: 60px;
-  padding: 7px 9px;
+  height: 78px;
+  padding: 14px 16px;
+  border: 0;
+  background: #fff;
+  box-shadow: 0 1px 2px rgb(16 24 40 / 4%);
+}
+
+.usage-records-page .usage-request-log .usage-events-table tbody td:first-child {
+  border-radius: 16px 0 0 16px;
+}
+
+.usage-records-page .usage-request-log .usage-events-table tbody td:last-child {
+  border-radius: 0 16px 16px 0;
+}
+
+.usage-records-page .usage-request-log .usage-events-table tbody tr:hover td {
+  background: #fff !important;
+  box-shadow: 0 8px 22px rgb(16 24 40 / 7%);
+}
+
+.usage-records-page .usage-request-log .usage-th-total,
+.usage-records-page .usage-request-log .usage-td-total {
+  border-left: 0;
+}
+
+.usage-records-page .usage-request-log .usage-events-footer {
+  min-height: 48px;
+  margin-top: 2px;
+  padding: 8px 4px 2px;
+  border: 0;
+  border-radius: 0;
+  background: transparent;
 }
 
 .usage-records-page .usage-request-log .usage-events-table td strong {
@@ -151,7 +226,4 @@
   display: none;
 }
 
-.usage-records-page .usage-request-log .usage-events-table tbody tr:nth-child(even) td {
-  background: color-mix(in srgb, var(--usage-log-surface) 97%, var(--ui-accent));
-}
 
diff --git a/src/styles/workspace-white.css b/src/styles/workspace-white.css
index d80cbcc..577775e 100644
--- a/src/styles/workspace-white.css
+++ b/src/styles/workspace-white.css
@@ -129,9 +129,7 @@
 :root:not([data-theme='dark']) .workspace :is(
   .usage-records-page,
   .usage-tab-panel,
-  .usage-filter-panel,
-  .usage-request-log,
-  .usage-events-footer
+  .usage-filter-panel
 ) {
   background: #fff;
 }
@@ -160,7 +158,7 @@
   .usage-request-log .usage-events-table tbody tr:nth-child(even) td,
 :root:not([data-theme='dark']) .workspace .usage-records-page
   .usage-request-log .usage-events-table tbody tr:hover td {
-  background: #fff !important;
+  background: #fff;
 }
 
 :root:not([data-theme='dark']) .workspace .usage-records-page
diff --git a/tests/browserMockQuota.test.ts b/tests/browserMockQuota.test.ts
index 2813b55..4d1518d 100644
--- a/tests/browserMockQuota.test.ts
+++ b/tests/browserMockQuota.test.ts
@@ -39,7 +39,7 @@ test('edge accounts expose exhausted, unknown, disabled and upstream-error state
   expect((await quota('antigravity-empty-quota.json')).status).toBe('error');
   expect((await quota('xai-paid-api.json')).rows[0].remainingPercent).toBeNull();
   expect((await quota('codex-disabled.json')).status).toBe('error');
-  expect(await quota('claude-expired.json')).toMatchObject({ status: 'error', error: 'Mock OAuth token expired' });
+  expect(await quota('claude-expired.json')).toMatchObject({ status: 'error', error: 'HTTP 401: Mock OAuth token expired' });
 });
 
 test('Codex and Claude resets consume credits and refresh only that account', async () => {
diff --git a/tests/devin.test.ts b/tests/devin.test.ts
index 7f81b59..a55b359 100644
--- a/tests/devin.test.ts
+++ b/tests/devin.test.ts
@@ -84,7 +84,7 @@ describe('Devin live quota', () => {
   it('reports upstream errors and empty successful responses', async () => {
     const post = spyOn(managementApi, 'post').mockResolvedValue({ status_code: 401, body: { error: 'expired' } } as never);
     mocks.push(post);
-    expect(await loadQuota(file)).toMatchObject({ status: 'error', rows: [], error: 'expired' });
+    expect(await loadQuota(file)).toMatchObject({ status: 'error', rows: [], error: 'HTTP 401: expired' });
     post.mockResolvedValue({ status_code: 200, body: liveStatus({ planInfo: { planName: 'Pro' } }) } as never);
     expect(await loadQuota(file)).toMatchObject({ status: 'error', rows: [] });
   });
diff --git a/tests/managementApi.test.ts b/tests/managementApi.test.ts
index 06785a8..b13c96a 100644
--- a/tests/managementApi.test.ts
+++ b/tests/managementApi.test.ts
@@ -118,19 +118,28 @@ describe('v8 Management API requests', () => {
 });
 
 describe('apiCallErrorMessage', () => {
-  it('从对象和 JSON 字符串错误体中提取可读消息', () => {
+  it('保留 HTTP 状态，并从对象和 JSON 字符串错误体中提取可读消息', () => {
     expect(apiCallErrorMessage({
       status_code: 401,
-      body: { error: { message: 'token expired' } },
-    })).toBe('token expired');
+      body: { error: { message: 'token expired', code: 'invalid_api_key' } },
+    })).toBe('HTTP 401: token expired (invalid_api_key)');
+
+    expect(apiCallErrorMessage({
+      status_code: 401,
+      body: { error: { message: 'Encountered invalidated oauth token for user, failing request', code: 401 } },
+    })).toBe('HTTP 401: Encountered invalidated oauth token for user, failing request');
 
     expect(apiCallErrorMessage({
       statusCode: 403,
       bodyText: JSON.stringify({ detail: 'permission denied' }),
-    })).toBe('permission denied');
+    })).toBe('HTTP 403: permission denied');
   });
 
-  it('没有错误体时回退到 HTTP 状态', () => {
+  it('消息已经包含状态码时不重复，没有错误体时回退到 HTTP 状态', () => {
+    expect(apiCallErrorMessage({
+      status_code: 401,
+      body: { error: { message: 'HTTP 401: token expired' } },
+    })).toBe('HTTP 401: token expired');
     expect(apiCallErrorMessage({ status_code: 429 })).toBe('Upstream returned HTTP 429');
   });
 });
diff --git a/tests/quotaConfirmation.test.ts b/tests/quotaConfirmation.test.ts
index 45e64a6..56fb966 100644
--- a/tests/quotaConfirmation.test.ts
+++ b/tests/quotaConfirmation.test.ts
@@ -140,7 +140,7 @@ describe('quota action confirmation with fully mocked IPC', () => {
     consumeError = true;
     expect(await resetCodexQuotaWithConfirmation(file, async () => true)).toBe('error');
     expect(getQuotaCacheSnapshot()[key]).toMatchObject({
-      rows: previous.rows, actionResult: { action: 'reset', status: 'error', error: 'reset denied' },
+      rows: previous.rows, actionResult: { action: 'reset', status: 'error', error: 'HTTP 409: reset denied' },
     });
     expect(canResetCodexQuota(file, getQuotaCacheSnapshot()[key])).toBe(true);
     expect(await resetCodexQuotaWithConfirmation(file, async () => false)).toBe('cancelled');
@@ -154,7 +154,7 @@ describe('quota action confirmation with fully mocked IPC', () => {
     refreshError = true;
     expect(await resetCodexQuotaWithConfirmation(file, async () => true)).toBe('refresh-error');
     expect(getQuotaCacheSnapshot()[key]).toMatchObject({
-      rows: previous.rows, actionResult: { action: 'reset', status: 'refresh-error', error: 'usage unavailable' },
+      rows: previous.rows, actionResult: { action: 'reset', status: 'refresh-error', error: 'HTTP 503: usage unavailable' },
     });
     expect(canResetCodexQuota(file, getQuotaCacheSnapshot()[key])).toBe(true);
     expect(await resetCodexQuotaWithConfirmation(file, async () => false)).toBe('cancelled');
diff --git a/tests/quotaRequests.test.ts b/tests/quotaRequests.test.ts
index b7dc954..7e15ef1 100644
--- a/tests/quotaRequests.test.ts
+++ b/tests/quotaRequests.test.ts
@@ -40,7 +40,7 @@ describe('quota API compatibility', () => {
       ...codexFile,
       metadata: { id_token: { chatgpt_account_id: 'account-test', plan_type: 'pro', chatgpt_subscription_active_until: '2030-01-01T00:00:00Z' } },
     });
-    expect(result).toMatchObject({ status: 'success', plan: 'pro', creditBalance: '12.5', creditsUnlimited: false, resetCredits: 2, resetCreditsApplicable: 0, resetCreditsError: 'credits forbidden' });
+    expect(result).toMatchObject({ status: 'success', plan: 'pro', creditBalance: '12.5', creditsUnlimited: false, resetCredits: 2, resetCreditsApplicable: 0, resetCreditsError: 'HTTP 403: credits forbidden' });
     expect(result.subscriptionActiveUntil).toBe('2030-01-01T00:00:00Z');
     expect(calls).toHaveLength(2);
     for (const call of calls) {
@@ -168,7 +168,7 @@ describe('xAI quota queries aligned with Management Center', () => {
   it('账单和回退都失败时保留原始账单错误', async () => {
     handler = (request) => request.url.includes('cli-chat-proxy')
       ? { status_code: 403, body: 'billing denied' } : { status_code: 429, body: 'paid denied' };
-    expect(await loadQuota(file)).toMatchObject({ status: 'error', error: 'billing denied' });
+    expect(await loadQuota(file)).toMatchObject({ status: 'error', error: 'HTTP 403: billing denied' });
     expect(calls).toHaveLength(4);
   });
 
@@ -176,7 +176,7 @@ describe('xAI quota queries aligned with Management Center', () => {
     handler = (request) => request.url.endsWith('/me')
       ? success({}) : { status_code: 429, body: 'chat denied' };
     expect(await loadQuota({ ...file, using_api: true, prefix: 'paid' }))
-      .toMatchObject({ status: 'error', error: 'chat denied' });
+      .toMatchObject({ status: 'error', error: 'HTTP 429: chat denied' });
     expect(calls).toHaveLength(2);
   });
 
@@ -269,7 +269,7 @@ describe('quota request synchronization', () => {
     const reset = consumeCodexResetCredit(codexFile);
     const refresh = loadQuota(codexFile);
     await expect(reset).rejects.toThrow('reset denied');
-    expect(await refresh).toMatchObject({ status: 'error', error: 'reset denied' });
+    expect(await refresh).toMatchObject({ status: 'error', error: 'HTTP 409: reset denied' });
     expect((await loadQuota(codexFile)).status).toBe('success');
   });
 });