feat(grok): 吸收调度阈值、配额解析、批量用量与 CLI 身份

从 personal-dev 取优并接线到 feat/grok-complete-integration：

- 调度阈值：grok_sched_* 写入、ApplyAccountSchedulingThreshold、
  account_scheduling_thresholds 设置与 Settings UI、网关过滤
- 配额头：x-rate-limit 别名、相对秒 reset、tier/entitlement 扩展
- 批量 usage：GetUsageBatch + POST /usage/batch + AccountsView 合并加载
- CLI 身份：xai.cli_identity 统一 pin/UA；service 层 applyGrokCLIHeaders
  与 transport 最终改写对齐；media eligibility 模块落地
- UsageCell：月度 cents→USD 与 30d 进度条展示

保留既有 failure taxonomy / sticky / free recovery 等 HEAD cools。

frontend/src/api/admin/accounts.ts

@@ -317,6 +317,19 @@ export async function getUsage(id: number, source?: 'passive' | 'active', force?
   return data
 }
 
+export interface BatchAccountUsageResponse {
+  usage: Record<string, AccountUsageInfo>
+  errors: Record<string, string>
+}
+
+export async function getBatchUsage(accountIds: number[], force?: boolean): Promise<BatchAccountUsageResponse> {
+  const { data } = await apiClient.post<BatchAccountUsageResponse>('/admin/accounts/usage/batch', {
+    account_ids: accountIds,
+    force: force === true
+  })
+  return data
+}
+
 /**
  * Clear account rate limit status
  * @param id - Account ID
@@ -986,6 +999,7 @@ export const accountsAPI = {
   getStats,
   clearError,
   getUsage,
+  getBatchUsage,
   getTodayStats,
   getBatchTodayStats,
   clearRateLimit,

frontend/src/api/admin/settings.ts

@@ -32,6 +32,38 @@ export type DefaultPlatformQuotasMap = Partial<Record<PlatformType, PlatformQuot
 
 const PLATFORMS: PlatformType[] = ["anthropic", "openai", "gemini", "antigravity", "grok"]
 
+export type SchedulingThresholdPlatformType =
+  | "openai"
+  | "anthropic"
+  | "grok"
+
+export type AccountSchedulingThresholdsMap = Record<SchedulingThresholdPlatformType, number>
+
+export const SCHEDULING_THRESHOLD_PLATFORMS: SchedulingThresholdPlatformType[] = [
+  "openai",
+  "anthropic",
+  "grok",
+]
+
+export function normalizeAccountSchedulingThresholdsMap(
+  input?: Partial<Record<SchedulingThresholdPlatformType, number>> | null,
+): AccountSchedulingThresholdsMap {
+  const result = {} as AccountSchedulingThresholdsMap
+  for (const platform of SCHEDULING_THRESHOLD_PLATFORMS) {
+    const value = input?.[platform]
+    result[platform] = typeof value === "number" && Number.isFinite(value)
+      ? Math.min(100, Math.max(1, Math.trunc(value)))
+      : 100
+  }
+  return result
+}
+
+export function sanitizeAccountSchedulingThresholdsMap(
+  input?: Partial<Record<SchedulingThresholdPlatformType, number>> | null,
+): AccountSchedulingThresholdsMap {
+  return normalizeAccountSchedulingThresholdsMap(input)
+}
+
 /** 归一化为全 4 平台 × 3 窗口（缺失填 null），供模板非空绑定 */
 export function normalizePlatformQuotasMap(input?: DefaultPlatformQuotasMap | null): DefaultPlatformQuotasMap {
   const result: DefaultPlatformQuotasMap = {}
@@ -559,6 +591,9 @@ export interface SystemSettings {
   grok_default_text_model: string;
   grok_cross_client_model_map_enabled: boolean;
 
+  // Per-platform account auto-pause thresholds (100 = disabled)
+  account_scheduling_thresholds: AccountSchedulingThresholdsMap;
+
   // Identity patch configuration (Claude -> Gemini)
   enable_identity_patch: boolean;
   identity_patch_prompt: string;
@@ -876,6 +911,7 @@ export interface UpdateSettingsRequest {
   fallback_model_antigravity?: string;
   grok_default_text_model?: string;
   grok_cross_client_model_map_enabled?: boolean;
+  account_scheduling_thresholds?: AccountSchedulingThresholdsMap;
   enable_identity_patch?: boolean;
   identity_patch_prompt?: string;
   ops_monitoring_enabled?: boolean;