feat(pool,trace): 账号封禁原因细分与请求追踪 attempted_only 过滤

- 将账号封禁原因从笼统的"账号异常"细分为封禁/停用/需要验证三类，
  前后端关键词组同步拆分，号池管理页面展示对应分类标签
- trace API 新增 attempted_only 参数，支持仅返回实际尝试过的候选，
  前端时间线组件默认启用过滤，排除 available/unused/skipped 记录

frontend/src/utils/accountBlock.ts

@@ -1,7 +1,19 @@
-// 账号级别封禁/异常的关键词匹配（用于判断 oauth_invalid_reason 是否属于账号封禁）
-const ACCOUNT_BLOCK_REASON_KEYWORDS = [
+// -- 按原因细分的关键词组 --
+
+// 封禁类 (suspended / banned)
+const KEYWORDS_SUSPENDED = [
+  'suspended',
   'account_block',
   'account blocked',
+  '封禁',
+  '封号',
+  '被封',
+  '账户已封禁',
+  '账号异常',
+]
+
+// 停用类 (disabled / deactivated)
+const KEYWORDS_DISABLED = [
   'account has been disabled',
   'account disabled',
   'account has been deactivated',
@@ -9,19 +21,22 @@ const ACCOUNT_BLOCK_REASON_KEYWORDS = [
   'account deactivated',
   'organization has been disabled',
   'organization_disabled',
+  'deactivated',
+  '访问被禁止',
+  '账户访问被禁止',
+]
+
+// 需要验证类
+const KEYWORDS_VERIFICATION = [
   'validation_required',
   'verify your account',
-  'suspended',
-  'deactivated',
-  // Kiro quota refresher 写入的确切文本
-  '账户已封禁',
-  // Antigravity quota refresher 写入的确切文本
-  '账户访问被禁止',
-  '封禁',
-  '封号',
-  '被封',
-  '访问被禁止',
-  '账号异常',
+]
+
+// 合并的完整列表
+const ACCOUNT_BLOCK_REASON_KEYWORDS = [
+  ...KEYWORDS_SUSPENDED,
+  ...KEYWORDS_DISABLED,
+  ...KEYWORDS_VERIFICATION,
 ]
 
 export function isAccountLevelBlockReason(reason: string | null | undefined): boolean {
@@ -33,6 +48,14 @@ export function isAccountLevelBlockReason(reason: string | null | undefined): bo
   return ACCOUNT_BLOCK_REASON_KEYWORDS.some(keyword => lowered.includes(keyword))
 }
 
+export function classifyAccountBlockLabel(reason: string): string {
+  const lowered = reason.toLowerCase()
+  if (KEYWORDS_VERIFICATION.some(kw => lowered.includes(kw))) return '需要验证'
+  if (KEYWORDS_DISABLED.some(kw => lowered.includes(kw))) return '账号停用'
+  if (KEYWORDS_SUSPENDED.some(kw => lowered.includes(kw))) return '账号封禁'
+  return '账号异常'
+}
+
 export function cleanAccountBlockReason(reason: string): string {
   return reason.replace(/^\[ACCOUNT_BLOCK\]\s*/i, '').trim()
 }