feat(provider): 增加 Claude Code 适配器、高级配置能力与 OAuth 账号类型统一解析

- 新增 Claude Code provider adapter (context, envelope, plugin, constants)
- 扩展 provider admin 路由，支持 Claude Code 高级配置 (CRUD)
- 统一 OAuth 账号类型解析逻辑，前后端对齐
- 重构 BatchAssignModelsDialog / ModelMappingDialog，简化组件逻辑
- handler 基类增强: request_builder 支持 Claude Code 信封格式
- CLI stream/sync mixin 适配 Claude Code 流式与同步模式
- 扩展 candidate builder / failover / scheduler 对 Claude Code 的支持
- 前端增加请求时间线可视化 (HorizontalRequestTimeline)
- 补充 Claude Code envelope / runtime controls / distributed sessions 等测试

Closes #183
Closes #185

Co-Authored-By: AAEE86 <[email protected]>

frontend/src/features/usage/components/RequestDetailDrawer.vue

@@ -370,6 +370,51 @@
                 </div>
               </Card>
 
+              <!-- 号池调度摘要 -->
+              <Card v-if="poolSummary">
+                <div class="p-3 sm:p-4">
+                  <div class="text-xs text-muted-foreground mb-2 font-medium">
+                    号池调度
+                  </div>
+                  <div class="flex items-center gap-3 flex-wrap text-sm">
+                    <span class="font-mono">
+                      {{ poolSummary.total_keys }} 候选
+                    </span>
+                    <span class="text-muted-foreground">|</span>
+                    <span class="font-mono">
+                      {{ poolSummary.attempted }} 尝试
+                    </span>
+                    <template v-if="poolSummary.skipped_cooldown > 0">
+                      <span class="text-muted-foreground">|</span>
+                      <span class="font-mono text-amber-600 dark:text-amber-400">
+                        {{ poolSummary.skipped_cooldown }} 冷却跳过
+                      </span>
+                    </template>
+                    <template v-if="poolSummary.skipped_cost > 0">
+                      <span class="text-muted-foreground">|</span>
+                      <span class="font-mono text-orange-600 dark:text-orange-400">
+                        {{ poolSummary.skipped_cost }} 成本跳过
+                      </span>
+                    </template>
+                    <template v-if="poolSummary.sticky_session">
+                      <span class="text-muted-foreground">|</span>
+                      <Badge
+                        variant="outline"
+                        class="text-[10px] px-1.5 py-0 h-4"
+                      >
+                        粘性会话
+                      </Badge>
+                    </template>
+                    <template v-if="poolSummary.success_reason">
+                      <span class="text-muted-foreground">|</span>
+                      <span class="text-xs text-muted-foreground">
+                        {{ poolSummary.success_reason }}
+                      </span>
+                    </template>
+                  </div>
+                </div>
+              </Card>
+
               <!-- 请求链路追踪卡片 -->
               <div v-if="detail.request_id || detail.id">
                 <HorizontalRequestTimeline
@@ -733,6 +778,13 @@ const isDark = computed(() => {
   return document.documentElement.classList.contains('dark')
 })
 
+// 号池调度摘要
+const poolSummary = computed(() => {
+  const ps = detail.value?.metadata?.pool_summary as Record<string, unknown> | undefined
+  if (!ps || !ps.enabled) return null
+  return ps
+})
+
 // 检测是否有提供商请求头
 const hasProviderHeaders = computed(() => {
   return !!(detail.value?.provider_request_headers &&