refactor(proxy): remove is_proxy_target in favor of failover_queue

- Remove `is_proxy_target` field from Provider struct (Rust & TypeScript)
- Remove related DAO methods: get_proxy_target_provider, set_proxy_target
- Remove deprecated Tauri commands: get_proxy_targets, set_proxy_target
- Add `is_available()` method to CircuitBreaker for availability checks
  without consuming HalfOpen probe permits (used in select_providers)
- Keep `allow_request()` for actual request gating with permit tracking
- Update stream_check to use failover_queue instead of is_proxy_target
- Clean up commented-out reset circuit breaker button in ProviderActions
- Remove unused useProxyTargets and useSetProxyTarget hooks

src/components/providers/ProviderActions.tsx

@@ -7,7 +7,6 @@ import {
   Play,
   TestTube2,
   Trash2,
-  RotateCcw,
 } from "lucide-react";
 import { useTranslation } from "react-i18next";
 import { Button } from "@/components/ui/button";
@@ -23,9 +22,6 @@ interface ProviderActionsProps {
   onTest?: () => void;
   onConfigureUsage: () => void;
   onDelete: () => void;
-  onResetCircuitBreaker?: () => void;
-  isProxyTarget?: boolean;
-  consecutiveFailures?: number;
 }
 
 export function ProviderActions({
@@ -38,9 +34,6 @@ export function ProviderActions({
   onTest,
   onConfigureUsage,
   onDelete,
-  onResetCircuitBreaker,
-  isProxyTarget,
-  consecutiveFailures = 0,
 }: ProviderActionsProps) {
   const { t } = useTranslation();
   const iconButtonClass = "h-8 w-8 p-1";
@@ -123,33 +116,6 @@ export function ProviderActions({
           <BarChart3 className="h-4 w-4" />
         </Button>
 
-        {/* 重置熔断器按钮 - 代理目标启用时显示 */}
-        {/* TODO: 暂时隐藏，后续根据故障转移功能启用 */}
-        {/* {onResetCircuitBreaker && isProxyTarget && (
-          <Button
-            size="icon"
-            variant="ghost"
-            onClick={onResetCircuitBreaker}
-            disabled={consecutiveFailures === 0}
-            title={
-              consecutiveFailures > 0
-                ? t("provider.resetCircuitBreaker", {
-                    defaultValue: "重置熔断器",
-                  })
-                : t("provider.noFailures", {
-                    defaultValue: "当前无失败记录",
-                  })
-            }
-            className={cn(
-              iconButtonClass,
-              consecutiveFailures > 0 &&
-                "hover:text-orange-500 dark:hover:text-orange-400",
-            )}
-          >
-            <RotateCcw className="h-4 w-4" />
-          </Button>
-        )} */}
-
         <Button
           size="icon"
           variant="ghost"

src/components/providers/ProviderCard.tsx

@@ -12,11 +12,7 @@ import { ProviderActions } from "@/components/providers/ProviderActions";
 import { ProviderIcon } from "@/components/ProviderIcon";
 import UsageFooter from "@/components/UsageFooter";
 import { ProviderHealthBadge } from "@/components/providers/ProviderHealthBadge";
-import {
-  useProviderHealth,
-  useResetCircuitBreaker,
-} from "@/lib/query/failover";
-import { toast } from "sonner";
+import { useProviderHealth } from "@/lib/query/failover";
 import { useUsageQuery } from "@/lib/query/queries";
 
 interface DragHandleProps {
@@ -98,32 +94,6 @@ export function ProviderCard({
   // 获取供应商健康状态
   const { data: health } = useProviderHealth(provider.id, appId);
 
-  // 重置熔断器
-  const resetCircuitBreaker = useResetCircuitBreaker();
-
-  const handleResetCircuitBreaker = async () => {
-    try {
-      await resetCircuitBreaker.mutateAsync({
-        providerId: provider.id,
-        appType: appId,
-      });
-      toast.success(
-        t("provider.circuitBreakerReset", {
-          defaultValue: "熔断器已重置",
-        }),
-        { closeButton: true },
-      );
-    } catch (error) {
-      toast.error(
-        t("provider.circuitBreakerResetFailed", {
-          defaultValue: "重置失败",
-        }) +
-          ": " +
-          String(error),
-      );
-    }
-  };
-
   const fallbackUrlText = t("provider.notConfigured", {
     defaultValue: "未配置接口地址",
   });
@@ -338,13 +308,6 @@ export function ProviderCard({
               onTest={onTest ? () => onTest(provider) : undefined}
               onConfigureUsage={() => onConfigureUsage(provider)}
               onDelete={() => onDelete(provider)}
-              onResetCircuitBreaker={
-                isProxyRunning && provider.isProxyTarget
-                  ? handleResetCircuitBreaker
-                  : undefined
-              }
-              isProxyTarget={provider.isProxyTarget}
-              consecutiveFailures={health?.consecutive_failures ?? 0}
             />
           </div>
         </div>

src/components/proxy/AutoFailoverConfigPanel.tsx

@@ -101,7 +101,7 @@ export function AutoFailoverConfigPanel({
           <AlertDescription className="text-sm">
             {t(
               "proxy.autoFailover.info",
-              "当启用多个代理目标时，系统会按优先级顺序依次尝试。当某个供应商连续失败达到阈值时，熔断器会自动打开，跳过该供应商。",
+              "当故障转移队列中配置了多个供应商时，系统会在请求失败时按优先级顺序依次尝试。当某个供应商连续失败达到阈值时，熔断器会打开并在一段时间内跳过该供应商。",
             )}
           </AlertDescription>
         </Alert>

src/components/proxy/ProxyPanel.tsx

@@ -4,7 +4,7 @@ import { Button } from "@/components/ui/button";
 import { useProxyStatus } from "@/hooks/useProxyStatus";
 import { ProxySettingsDialog } from "./ProxySettingsDialog";
 import { toast } from "sonner";
-import { useProxyTargets } from "@/lib/query/failover";
+import { useFailoverQueue } from "@/lib/query/failover";
 import { ProviderHealthBadge } from "@/components/providers/ProviderHealthBadge";
 import { useProviderHealth } from "@/lib/query/failover";
 import type { ProxyStatus } from "@/types/proxy";
@@ -13,10 +13,11 @@ export function ProxyPanel() {
   const { status, isRunning } = useProxyStatus();
   const [showSettings, setShowSettings] = useState(false);
 
-  // 获取所有三个应用类型的代理目标列表
-  const { data: claudeTargets = [] } = useProxyTargets("claude");
-  const { data: codexTargets = [] } = useProxyTargets("codex");
-  const { data: geminiTargets = [] } = useProxyTargets("gemini");
+  // 获取所有三个应用类型的故障转移队列（不包含当前供应商）
+  // 当前供应商始终优先，队列仅用于失败后的备用顺序
+  const { data: claudeQueue = [] } = useFailoverQueue("claude");
+  const { data: codexQueue = [] } = useFailoverQueue("codex");
+  const { data: geminiQueue = [] } = useFailoverQueue("gemini");
 
   const formatUptime = (seconds: number): string => {
     const hours = Math.floor(seconds / 3600);
@@ -95,9 +96,9 @@ export function ProxyPanel() {
               </div>
 
               {/* 供应商队列 - 按应用类型分组展示 */}
-              {(claudeTargets.length > 0 ||
-                codexTargets.length > 0 ||
-                geminiTargets.length > 0) && (
+              {(claudeQueue.length > 0 ||
+                codexQueue.length > 0 ||
+                geminiQueue.length > 0) && (
                 <div className="pt-3 border-t border-border space-y-3">
                   <div className="flex items-center gap-2">
                     <ListOrdered className="h-3.5 w-3.5 text-muted-foreground" />
@@ -107,31 +108,49 @@ export function ProxyPanel() {
                   </div>
 
                   {/* Claude 队列 */}
-                  {claudeTargets.length > 0 && (
+                  {claudeQueue.length > 0 && (
                     <ProviderQueueGroup
                       appType="claude"
                       appLabel="Claude"
-                      targets={claudeTargets}
+                      targets={claudeQueue
+                        .filter((item) => item.enabled)
+                        .sort((a, b) => a.queueOrder - b.queueOrder)
+                        .map((item) => ({
+                          id: item.providerId,
+                          name: item.providerName,
+                        }))}
                       status={status}
                     />
                   )}
 
                   {/* Codex 队列 */}
-                  {codexTargets.length > 0 && (
+                  {codexQueue.length > 0 && (
                     <ProviderQueueGroup
                       appType="codex"
                       appLabel="Codex"
-                      targets={codexTargets}
+                      targets={codexQueue
+                        .filter((item) => item.enabled)
+                        .sort((a, b) => a.queueOrder - b.queueOrder)
+                        .map((item) => ({
+                          id: item.providerId,
+                          name: item.providerName,
+                        }))}
                       status={status}
                     />
                   )}
 
                   {/* Gemini 队列 */}
-                  {geminiTargets.length > 0 && (
+                  {geminiQueue.length > 0 && (
                     <ProviderQueueGroup
                       appType="gemini"
                       appLabel="Gemini"
-                      targets={geminiTargets}
+                      targets={geminiQueue
+                        .filter((item) => item.enabled)
+                        .sort((a, b) => a.queueOrder - b.queueOrder)
+                        .map((item) => ({
+                          id: item.providerId,
+                          name: item.providerName,
+                        }))}
                       status={status}
                     />
                   )}

src/components/settings/SettingsPage.tsx

@@ -7,7 +7,9 @@ import {
   Coins,
   Database,
   Server,
+  ChevronDown,
 } from "lucide-react";
+import * as AccordionPrimitive from "@radix-ui/react-accordion";
 import { toast } from "sonner";
 import {
   Dialog,
@@ -279,10 +281,10 @@ export function SettingsPage({
 
                     <AccordionItem
                       value="proxy"
-                      className="rounded-xl glass-card overflow-hidden"
+                      className="rounded-xl glass-card overflow-hidden [&[data-state=open]>.accordion-header]:bg-muted/50"
                     >
-                      <AccordionTrigger className="px-6 py-4 hover:no-underline hover:bg-muted/50 data-[state=open]:bg-muted/50">
-                        <div className="flex flex-1 items-center justify-between pr-4">
+                      <AccordionPrimitive.Header className="accordion-header flex items-center justify-between px-6 py-4 hover:bg-muted/50">
+                        <AccordionPrimitive.Trigger className="flex flex-1 items-center justify-between hover:no-underline [&[data-state=open]>svg]:rotate-180">
                           <div className="flex items-center gap-3">
                             <Server className="h-5 w-5 text-green-500" />
                             <div className="text-left">
@@ -294,27 +296,26 @@ export function SettingsPage({
                               </p>
                             </div>
                           </div>
-                          <div
-                            className="flex items-center gap-4"
-                            onClick={(e) => e.stopPropagation()}
+                          <ChevronDown className="h-4 w-4 shrink-0 transition-transform duration-200" />
+                        </AccordionPrimitive.Trigger>
+
+                        <div className="flex items-center gap-4 pl-4">
+                          <Badge
+                            variant={isRunning ? "default" : "secondary"}
+                            className="gap-1.5 h-6"
                           >
-                            <Badge
-                              variant={isRunning ? "default" : "secondary"}
-                              className="gap-1.5 h-6"
-                            >
-                              <Activity
-                                className={`h-3 w-3 ${isRunning ? "animate-pulse" : ""}`}
-                              />
-                              {isRunning ? "运行中" : "已停止"}
-                            </Badge>
-                            <Switch
-                              checked={isRunning}
-                              onCheckedChange={handleToggleProxy}
-                              disabled={isProxyPending}
+                            <Activity
+                              className={`h-3 w-3 ${isRunning ? "animate-pulse" : ""}`}
                             />
-                          </div>
+                            {isRunning ? "运行中" : "已停止"}
+                          </Badge>
+                          <Switch
+                            checked={isRunning}
+                            onCheckedChange={handleToggleProxy}
+                            disabled={isProxyPending}
+                          />
                         </div>
-                      </AccordionTrigger>
+                      </AccordionPrimitive.Header>
                       <AccordionContent className="px-6 pb-6 pt-0 border-t border-border/50">
                         <ProxyPanel />
                       </AccordionContent>
@@ -344,10 +345,10 @@ export function SettingsPage({
 
                     <AccordionItem
                       value="failover"
-                      className="rounded-xl glass-card overflow-hidden"
+                      className="rounded-xl glass-card overflow-hidden [&[data-state=open]>.accordion-header]:bg-muted/50"
                     >
-                      <AccordionTrigger className="px-6 py-4 hover:no-underline hover:bg-muted/50 data-[state=open]:bg-muted/50">
-                        <div className="flex flex-1 items-center justify-between pr-4">
+                      <AccordionPrimitive.Header className="accordion-header flex items-center justify-between px-6 py-4 hover:bg-muted/50">
+                        <AccordionPrimitive.Trigger className="flex flex-1 items-center justify-between hover:no-underline [&[data-state=open]>svg]:rotate-180">
                           <div className="flex items-center gap-3">
                             <Activity className="h-5 w-5 text-orange-500" />
                             <div className="text-left">
@@ -359,20 +360,16 @@ export function SettingsPage({
                               </p>
                             </div>
                           </div>
-                          <div
-                            className="flex items-center gap-4"
-                            onClick={(e) => e.stopPropagation()}
-                          >
-                            <div className="flex items-center gap-2">
-                              {/* Removed status text as requested */}
-                              <Switch
-                                checked={failoverEnabled}
-                                onCheckedChange={setFailoverEnabled}
-                              />
-                            </div>
-                          </div>
+                          <ChevronDown className="h-4 w-4 shrink-0 transition-transform duration-200" />
+                        </AccordionPrimitive.Trigger>
+
+                        <div className="flex items-center gap-2 pl-4">
+                          <Switch
+                            checked={failoverEnabled}
+                            onCheckedChange={setFailoverEnabled}
+                          />
                         </div>
-                      </AccordionTrigger>
+                      </AccordionPrimitive.Header>
                       <AccordionContent className="px-6 pb-6 pt-4 border-t border-border/50">
                         <div className="space-y-6">
                           {/* 故障转移队列管理 */}

src/i18n/locales/en.json

@@ -864,7 +864,7 @@
       "toggleFailed": "Failed to update status"
     },
     "autoFailover": {
-      "info": "When multiple proxy targets are enabled, the system will try them in priority order. When a provider fails consecutively reaching the threshold, the circuit breaker will open and skip that provider.",
+      "info": "When the failover queue has multiple providers, the system will try them in priority order when requests fail. When a provider reaches the consecutive failure threshold, the circuit breaker will open and skip it temporarily.",
       "configSaved": "Auto failover config saved",
       "configSaveFailed": "Failed to save",
       "retrySettings": "Retry & Timeout Settings",

src/i18n/locales/zh.json

@@ -864,7 +864,7 @@
       "toggleFailed": "状态更新失败"
     },
     "autoFailover": {
-      "info": "当启用多个代理目标时，系统会按优先级顺序依次尝试。当某个供应商连续失败达到阈值时，熔断器会自动打开，跳过该供应商。",
+      "info": "当故障转移队列中配置了多个供应商时，系统会在请求失败时按优先级顺序依次尝试。当某个供应商连续失败达到阈值时，熔断器会打开并在一段时间内跳过该供应商。",
       "configSaved": "自动故障转移配置已保存",
       "configSaveFailed": "保存失败",
       "retrySettings": "重试与超时设置",

src/lib/api/failover.ts

@@ -18,26 +18,9 @@ export interface Provider {
   meta?: unknown;
   icon?: string;
   iconColor?: string;
-  isProxyTarget?: boolean;
 }
 
 export const failoverApi = {
-  // ========== 旧版代理目标 API（保留向后兼容）==========
-
-  // 获取代理目标列表
-  async getProxyTargets(appType: string): Promise<Provider[]> {
-    return invoke("get_proxy_targets", { appType });
-  },
-
-  // 设置代理目标
-  async setProxyTarget(
-    providerId: string,
-    appType: string,
-    enabled: boolean,
-  ): Promise<void> {
-    return invoke("set_proxy_target", { providerId, appType, enabled });
-  },
-
   // ========== 熔断器 API ==========
 
   // 获取供应商健康状态

src/lib/api/providers.ts

@@ -38,10 +38,6 @@ export const providersApi = {
     return await invoke("switch_provider", { id, app: appId });
   },
 
-  async setProxyTarget(id: string, appId: AppId): Promise<boolean> {
-    return await invoke("set_proxy_target_provider", { id, app: appId });
-  },
-
   async importDefault(appId: AppId): Promise<boolean> {
     return await invoke("import_default_config", { app: appId });
   },

src/lib/query/failover.ts

@@ -1,50 +1,6 @@
 import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
 import { failoverApi } from "@/lib/api/failover";
 
-// ========== 旧版代理目标 Hooks（保留向后兼容）==========
-
-/**
- * 获取代理目标列表
- */
-export function useProxyTargets(appType: string) {
-  return useQuery({
-    queryKey: ["proxyTargets", appType],
-    queryFn: () => failoverApi.getProxyTargets(appType),
-    enabled: !!appType,
-  });
-}
-
-/**
- * 设置代理目标
- */
-export function useSetProxyTarget() {
-  const queryClient = useQueryClient();
-
-  return useMutation({
-    mutationFn: ({
-      providerId,
-      appType,
-      enabled,
-    }: {
-      providerId: string;
-      appType: string;
-      enabled: boolean;
-    }) => failoverApi.setProxyTarget(providerId, appType, enabled),
-    onSuccess: (_, variables) => {
-      // 刷新代理目标列表
-      queryClient.invalidateQueries({
-        queryKey: ["proxyTargets", variables.appType],
-      });
-      // 刷新供应商列表
-      queryClient.invalidateQueries({ queryKey: ["providers"] });
-      // 刷新健康状态
-      queryClient.invalidateQueries({
-        queryKey: ["providerHealth", variables.providerId, variables.appType],
-      });
-    },
-  });
-}
-
 // ========== 熔断器 Hooks ==========
 
 /**

src/lib/query/mutations.ts

@@ -180,35 +180,6 @@ export const useSwitchProviderMutation = (appId: AppId) => {
   });
 };
 
-export const useSetProxyTargetMutation = (appId: AppId) => {
-  const queryClient = useQueryClient();
-  const { t } = useTranslation();
-
-  return useMutation({
-    mutationFn: async (providerId: string) => {
-      return await providersApi.setProxyTarget(providerId, appId);
-    },
-    onSuccess: async () => {
-      await queryClient.invalidateQueries({ queryKey: ["providers", appId] });
-      toast.success(
-        t("notifications.proxyTargetSet", {
-          defaultValue: "已设置代理目标",
-        }),
-        { closeButton: true },
-      );
-    },
-    onError: (error: Error) => {
-      const detail = extractErrorMessage(error) || t("common.unknown");
-      toast.error(
-        t("notifications.setProxyTargetFailed", {
-          defaultValue: "设置代理目标失败: {{error}}",
-          error: detail,
-        }),
-      );
-    },
-  });
-};
-
 export const useSaveSettingsMutation = () => {
   const queryClient = useQueryClient();
 

src/types.ts

@@ -23,8 +23,6 @@ export interface Provider {
   // 图标配置
   icon?: string; // 图标名称（如 "openai", "anthropic"）
   iconColor?: string; // 图标颜色（Hex 格式，如 "#00A67E"）
-  // 新增：是否为代理目标
-  isProxyTarget?: boolean;
 }
 
 export interface AppConfig {