feat(admin,pool,billing): 端点级模型测试、Provider 自动置顶、缓存 TTL 分级计费展示与账号状态增强

- 模型测试支持指定端点：新增 ModelTestDialog 组件，多端点时弹窗选择，单端点直接测试；
  后端 test-model-failover 接口新增 endpoint_id 参数，支持 global/direct 模式下按端点过滤候选
- 创建 Provider 时优先级自动置顶（provider_priority 默认 None，后端取 min-1），
  显式指定优先级时 shift 已有行；前端创建时不发送 priority，更新时保留
- 缓存计费 UI 增强：RequestDetailDrawer 支持 5min/1h 缓存创建 token 分级展示，
  含按 TTL 匹配单价和分行成本计算；ModelDetailDrawer/ModelsTab 标签区分 5min/1h 缓存创建
- Pool 批量操作额度筛选拆分为「无5H限额」和「无周限额」，按 | 分隔 segment 匹配
- KeyFormDialog 优化非 vertex_ai 时布局，API 密钥输入内联到 grid 右列
- Codex refresher 结构化错误标记：401/402/403 使用 [OAUTH_EXPIRED]/[ACCOUNT_BLOCK] 前缀，
  新增 deactivated_workspace 识别与分类
- 前后端 accountBlock 关键词同步：新增 token invalidated、deactivated_workspace 识别，
  OAuth 失效提示清理 block 前缀后展示
- PoolConfig 新增 batch_concurrency 配置（默认 8，上限 32）
- 预设模型新增 gpt-5.4；TestResultDialog 响应式布局与 key 脱敏优化

tests/services/test_pool_account_state.py

@@ -115,3 +115,25 @@ def test_antigravity_oauth_reason_text_detected_as_disabled() -> None:
     assert state.blocked is True
     assert state.code == "account_disabled"
     assert state.label == "账号停用"
+
+
+def test_resolve_from_structured_oauth_reason_workspace_deactivated() -> None:
+    state = resolve_pool_account_state(
+        provider_type="codex",
+        upstream_metadata=None,
+        oauth_invalid_reason="[ACCOUNT_BLOCK] 工作区已停用 (deactivated_workspace)",
+    )
+    assert state.blocked is True
+    assert state.code == "workspace_deactivated"
+    assert state.label == "工作区停用"
+
+
+def test_resolve_from_structured_oauth_reason_token_invalidated() -> None:
+    state = resolve_pool_account_state(
+        provider_type="codex",
+        upstream_metadata=None,
+        oauth_invalid_reason="[OAUTH_EXPIRED] Your authentication token has been invalidated. Please try signing in again.",
+    )
+    assert state.blocked is True
+    assert state.code == "oauth_expired"
+    assert state.label == "Token 失效"