feat(health-check): replace real-LLM probe with HTTP reachability check

The provider panel health check sent a real streaming model request, which many third-party providers block (401/403/WAF), causing false negatives while only stable official endpoints passed. Replace it with a lightweight reachability probe: GET the provider base_url and treat any HTTP response (200/4xx/5xx) as reachable; only DNS/connect/TLS/timeout count as failure. Latency is the probe's TTFB.

Backend (services/stream_check.rs): rewrite ~2200 -> ~350 lines, dropping real-request building, format conversion, auth and API-path resolution while keeping per-app base_url extraction. Defaults: 8s timeout, 1 retry, 1500ms degraded threshold.

Failover invariant: the reachability check must never reset the circuit breaker (reachable != usable; a 403 host is reachable but broken for real traffic). Remove the resetCircuitBreaker call from useStreamCheck; failover failure detection stays driven solely by real proxy traffic (forwarder/circuit_breaker untouched). useResetCircuitBreaker is kept dormant for a future manual-recovery entry.

Open the check to all providers: drop the official/copilot/codex-oauth/third-party gating and the 'sends a real request' confirm dialog. For official providers whose base_url is intentionally empty, fall back to the endpoint the client actually uses (Claude -> api.anthropic.com, Codex -> chatgpt.com/backend-api/codex, Gemini -> generativelanguage). Non-official providers with a missing base_url still error to avoid a false green light. Claude Desktop Official is native 1P mode (talks to claude.ai, cc-switch not in the request path, no reliable endpoint) so its button stays hidden.

Slim StreamCheckConfig and per-provider testConfig to timeout/threshold/retries (drop test model + prompt); sync zh/en/ja/zh-TW. Retain the now-unused anthropic_to_openai/anthropic_to_gemini transform utilities and their test suites.

src/components/providers/ProviderActions.tsx

@@ -1,4 +1,5 @@
 import {
+  Activity,
   BarChart3,
   Check,
   Copy,
@@ -8,7 +9,6 @@ import {
   Play,
   Plus,
   Terminal,
-  TestTube2,
   Trash2,
   Zap,
 } from "lucide-react";
@@ -310,7 +310,7 @@ export function ProviderActions({
           variant="ghost"
           onClick={onTest || undefined}
           disabled={isTesting}
-          title={t("modelTest.testProvider", "测试模型")}
+          title={t("provider.connectivityCheck", "检测连通")}
           className={cn(
             iconButtonClass,
             !onTest && "opacity-40 cursor-not-allowed text-muted-foreground",
@@ -319,7 +319,7 @@ export function ProviderActions({
           {isTesting ? (
             <Loader2 className="h-4 w-4 animate-spin" />
           ) : (
-            <TestTube2 className="h-4 w-4" />
+            <Activity className="h-4 w-4" />
           )}
         </Button>
 

src/components/providers/ProviderCard.tsx

@@ -232,9 +232,6 @@ export function ProviderCard({
     provider.meta?.apiFormat,
     (provider.settingsConfig as Record<string, any>)?.config,
   ]);
-  const isClaudeThirdParty =
-    appId === "claude" && provider.category === "third_party";
-
   // 获取用量数据以判断是否有多套餐
   // 累加模式应用（OpenCode/OpenClaw/Hermes）：使用 isInConfig 代替 isCurrent
   const shouldAutoQuery =
@@ -551,11 +548,13 @@ export function ProviderCard({
               onEdit={() => onEdit(provider)}
               onDuplicate={() => onDuplicate(provider)}
               onTest={
+                // 连通检测对所有供应商开放（官方会回退到客户端实际会连的官方端点），
+                // 唯独 Claude Desktop 官方除外：它是原生 1P 模式（走 claude.ai，cc-switch
+                // 不在请求路径上），没有可靠的探测目标，故隐藏其检测按钮。
                 onTest &&
-                !isOfficial &&
-                !isCopilot &&
-                !isCodexOauth &&
-                !isClaudeThirdParty
+                !(
+                  appId === "claude-desktop" && provider.category === "official"
+                )
                   ? () => onTest(provider)
                   : undefined
               }

src/components/providers/ProviderList.tsx

@@ -45,8 +45,6 @@ import {
 import { useCallback } from "react";
 import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
-import { ConfirmDialog } from "@/components/ConfirmDialog";
-import { settingsApi } from "@/lib/api/settings";
 
 interface ProviderListProps {
   providers: Record<string, Provider>;
@@ -192,9 +190,6 @@ export function ProviderList({
   const [searchTerm, setSearchTerm] = useState("");
   const [isSearchOpen, setIsSearchOpen] = useState(false);
   const searchInputRef = useRef<HTMLInputElement>(null);
-  const [showStreamCheckConfirm, setShowStreamCheckConfirm] = useState(false);
-  const [pendingTestProvider, setPendingTestProvider] =
-    useState<Provider | null>(null);
   const { data: claudeDesktopStatus } = useQuery({
     queryKey: ["claudeDesktopStatus"],
     queryFn: () => providersApi.getClaudeDesktopStatus(),
@@ -202,41 +197,14 @@ export function ProviderList({
     refetchInterval: appId === "claude-desktop" ? 5000 : false,
   });
 
-  // Query settings for streamCheckConfirmed flag
-  const { data: settings } = useQuery({
-    queryKey: ["settings"],
-    queryFn: () => settingsApi.get(),
-  });
-
+  // 连通性检查不发真实请求、无封号/计费风险，直接执行（无需确认弹窗）。
   const handleTest = useCallback(
     (provider: Provider) => {
-      if (!settings?.streamCheckConfirmed) {
-        setPendingTestProvider(provider);
-        setShowStreamCheckConfirm(true);
-      } else {
-        checkProvider(provider.id, provider.name);
-      }
+      checkProvider(provider.id, provider.name);
     },
-    [checkProvider, settings?.streamCheckConfirmed],
+    [checkProvider],
   );
 
-  const handleStreamCheckConfirm = async () => {
-    setShowStreamCheckConfirm(false);
-    try {
-      if (settings) {
-        const { webdavSync: _, ...rest } = settings;
-        await settingsApi.save({ ...rest, streamCheckConfirmed: true });
-        await queryClient.invalidateQueries({ queryKey: ["settings"] });
-      }
-    } catch (error) {
-      console.error("Failed to save stream check confirmed:", error);
-    }
-    if (pendingTestProvider) {
-      checkProvider(pendingTestProvider.id, pendingTestProvider.name);
-      setPendingTestProvider(null);
-    }
-  };
-
   // Import current live config as default provider
   const queryClient = useQueryClient();
   const importMutation = useMutation({
@@ -558,19 +526,6 @@ export function ProviderList({
       ) : (
         renderProviderList()
       )}
-
-      <ConfirmDialog
-        isOpen={showStreamCheckConfirm}
-        variant="info"
-        title={t("confirm.streamCheck.title")}
-        message={t("confirm.streamCheck.message")}
-        confirmText={t("confirm.streamCheck.confirm")}
-        onConfirm={() => void handleStreamCheckConfirm()}
-        onCancel={() => {
-          setShowStreamCheckConfirm(false);
-          setPendingTestProvider(null);
-        }}
-      />
     </div>
   );
 }

src/components/providers/forms/ProviderAdvancedConfig.tsx

@@ -61,7 +61,7 @@ export function ProviderAdvancedConfig({
             <FlaskConical className="h-4 w-4 text-muted-foreground" />
             <span className="font-medium">
               {t("providerAdvanced.testConfig", {
-                defaultValue: "模型测试配置",
+                defaultValue: "连通检测配置",
               })}
             </span>
           </div>
@@ -106,31 +106,10 @@ export function ProviderAdvancedConfig({
             <p className="text-sm text-muted-foreground">
               {t("providerAdvanced.testConfigDesc", {
                 defaultValue:
-                  "为此供应商配置单独的模型测试参数，不启用时使用全局配置。",
+                  "为此供应商配置单独的连通检测参数（超时/阈值/重试），不启用时使用全局配置。",
               })}
             </p>
             <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
-              <div className="space-y-2">
-                <Label htmlFor="test-model">
-                  {t("providerAdvanced.testModel", {
-                    defaultValue: "测试模型",
-                  })}
-                </Label>
-                <Input
-                  id="test-model"
-                  value={testConfig.testModel || ""}
-                  onChange={(e) =>
-                    onTestConfigChange({
-                      ...testConfig,
-                      testModel: e.target.value || undefined,
-                    })
-                  }
-                  placeholder={t("providerAdvanced.testModelPlaceholder", {
-                    defaultValue: "留空使用全局配置",
-                  })}
-                  disabled={!testConfig.enabled}
-                />
-              </div>
               <div className="space-y-2">
                 <Label htmlFor="test-timeout">
                   {t("providerAdvanced.timeoutSecs", {
@@ -141,7 +120,7 @@ export function ProviderAdvancedConfig({
                   id="test-timeout"
                   type="number"
                   min={1}
-                  max={300}
+                  max={60}
                   value={testConfig.timeoutSecs || ""}
                   onChange={(e) =>
                     onTestConfigChange({
@@ -151,26 +130,7 @@ export function ProviderAdvancedConfig({
                         : undefined,
                     })
                   }
-                  placeholder="45"
-                  disabled={!testConfig.enabled}
-                />
-              </div>
-              <div className="space-y-2">
-                <Label htmlFor="test-prompt">
-                  {t("providerAdvanced.testPrompt", {
-                    defaultValue: "测试提示词",
-                  })}
-                </Label>
-                <Input
-                  id="test-prompt"
-                  value={testConfig.testPrompt || ""}
-                  onChange={(e) =>
-                    onTestConfigChange({
-                      ...testConfig,
-                      testPrompt: e.target.value || undefined,
-                    })
-                  }
-                  placeholder="Who are you?"
+                  placeholder="8"
                   disabled={!testConfig.enabled}
                 />
               </div>
@@ -184,7 +144,7 @@ export function ProviderAdvancedConfig({
                   id="degraded-threshold"
                   type="number"
                   min={100}
-                  max={60000}
+                  max={10000}
                   value={testConfig.degradedThresholdMs || ""}
                   onChange={(e) =>
                     onTestConfigChange({
@@ -194,7 +154,7 @@ export function ProviderAdvancedConfig({
                         : undefined,
                     })
                   }
-                  placeholder="6000"
+                  placeholder="1500"
                   disabled={!testConfig.enabled}
                 />
               </div>
@@ -208,7 +168,7 @@ export function ProviderAdvancedConfig({
                   id="max-retries"
                   type="number"
                   min={0}
-                  max={10}
+                  max={5}
                   value={testConfig.maxRetries ?? ""}
                   onChange={(e) =>
                     onTestConfigChange({
@@ -218,7 +178,7 @@ export function ProviderAdvancedConfig({
                         : undefined,
                     })
                   }
-                  placeholder="2"
+                  placeholder="1"
                   disabled={!testConfig.enabled}
                 />
               </div>