feat(usage): 记录并展示失败请求(用户端+管理端)

- 记录失败请求并在用户端/管理端展示;分类下拉改用统一 Select 组件
- 模型过滤改后端 ILIKE 模糊匹配;新增「Key 名称」列(含已删除标记)与按 Key 过滤;时间列移至末列
- 用户可见「已删除 key 失败请求」:OpsErrorLogFilter 加 MatchDeletedKeyOwner,用户侧归属
  放宽为 (user_id OR deleted_key_owner_user_id),让 key 原所有者能看到删除 key 后继续请求
  导致的认证失败记录(他人仍 NotFound,不泄露存在性)
- 迁移 148:ops_error_logs 用户+时间索引

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/i18n/locales/en.ts

@@ -933,7 +933,26 @@ export default {
     exportExcelSuccess: 'Usage data exported successfully (Excel format)',
     exportExcelFailed: 'Failed to export usage data',
     imageUnit: ' images',
-    userAgent: 'User-Agent'
+    userAgent: 'User-Agent',
+    tabs: { usage: 'Usage', errors: 'Error Requests' },
+    errors: {
+      time: 'Time', model: 'Model', endpoint: 'Endpoint', status: 'Status',
+      category: 'Category', platform: 'Platform', message: 'Message',
+      keyName: 'Key Name', keyDeleted: 'Deleted', allKeys: 'All keys',
+      modelPlaceholder: 'Search model', allCategories: 'All categories',
+      empty: 'No error requests', failedToLoad: 'Failed to load error requests',
+      categories: {
+        auth: 'Auth failed', rate_limit: 'Rate limited', quota: 'Balance/Subscription',
+        invalid_request: 'Invalid request', service_unavailable: 'Service unavailable',
+        upstream: 'Upstream error', internal: 'Platform error', other: 'Other',
+      },
+      detail: {
+        title: 'Error Request Detail',
+        responseBody: 'Response Body',
+        upstreamStatus: 'Upstream Status',
+        loadFailed: 'Failed to load detail, please try again',
+      },
+    },
   },
 
   // Shared keys for channel monitor (admin + user views)
@@ -6332,6 +6351,14 @@ export default {
         title: 'OpenAI experimental scheduler policy',
         description: "Disabled by default. When enabled, this only changes the gateway's experimental account-selection policy for OpenAI traffic; it does not indicate an upstream OpenAI capability."
       },
+      usageRecords: {
+        title: 'Usage Records',
+        description: 'Settings for usage and failed-request records visible to end users.',
+      },
+      user_error_view: {
+        label: 'Allow users to view their own error requests',
+        description: 'When enabled, users can see a redacted view of their failed requests on the usage page (no internal/upstream details). Requires ops monitoring enabled to have data.',
+      },
       saveSettings: 'Save Settings',
       saving: 'Saving...',
       settingsSaved: 'Settings saved successfully',

frontend/src/i18n/locales/zh.ts

@@ -937,7 +937,26 @@ export default {
     exportExcelSuccess: '使用数据导出成功（Excel格式）',
     exportExcelFailed: '使用数据导出失败',
     imageUnit: '张',
-    userAgent: 'User-Agent'
+    userAgent: 'User-Agent',
+    tabs: { usage: '用量明细', errors: '错误请求' },
+    errors: {
+      time: '时间', model: '模型', endpoint: '端点', status: '状态码',
+      category: '分类', platform: '平台', message: '错误信息',
+      keyName: 'Key 名称', keyDeleted: '已删除', allKeys: '全部 Key',
+      modelPlaceholder: '搜索模型', allCategories: '全部分类',
+      empty: '暂无错误请求', failedToLoad: '加载错误请求失败',
+      categories: {
+        auth: '认证失败', rate_limit: '限流', quota: '余额/订阅',
+        invalid_request: '参数错误', service_unavailable: '服务暂时不可用',
+        upstream: '上游错误', internal: '平台错误', other: '其他',
+      },
+      detail: {
+        title: '错误请求详情',
+        responseBody: '上游响应内容',
+        upstreamStatus: '上游状态码',
+        loadFailed: '加载详情失败，请稍后重试',
+      },
+    },
   },
 
   // Shared keys for channel monitor (admin + user views)
@@ -6487,6 +6506,14 @@ export default {
         title: 'OpenAI 实验调度策略',
         description: '默认关闭。开启后仅影响本网关在 OpenAI 账号间的实验性调度选择逻辑，不代表上游 OpenAI 官方能力。'
       },
+      usageRecords: {
+        title: '使用记录',
+        description: '与终端用户可见的用量及失败请求记录相关的设置。',
+      },
+      user_error_view: {
+        label: '允许用户查看自己的错误请求',
+        description: '开启后，用户可在用量页查看自己失败请求的精简信息（不含内部/上游错误细节）。需运维监控开启才有数据。',
+      },
       saveSettings: '保存设置',
       saving: '保存中...',
       settingsSaved: '设置保存成功',