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-tauri/src/commands/stream_check.rs

@@ -1,4 +1,7 @@
-//! 流式健康检查命令
+//! 供应商连通性检查命令
+//!
+//! 注意：本检查只探测 base_url 是否可达，不发真实大模型请求，也不触碰故障转移
+//! 熔断器（熔断器由真实转发流量驱动）。详见 `services::stream_check`。
 
 use crate::app_config::AppType;
 use crate::commands::copilot::CopilotAuthState;
@@ -10,7 +13,7 @@ use crate::store::AppState;
 use std::collections::HashSet;
 use tauri::State;
 
-/// 流式健康检查（单个供应商）
+/// 连通性检查（单个供应商）
 #[tauri::command]
 pub async fn stream_check_provider(
     state: State<'_, AppState>,
@@ -25,25 +28,12 @@ pub async fn stream_check_provider(
         .get(&provider_id)
         .ok_or_else(|| AppError::Message(format!("供应商 {provider_id} 不存在")))?;
 
-    let auth_override = resolve_copilot_auth_override(provider, &copilot_state).await?;
+    // Copilot 端点是动态的（随 OAuth token 解析），需预先取出 host 再探测；
+    // 其余供应商传 None，由服务层从 settings_config 提取 base_url。无需鉴权。
     let base_url_override = resolve_copilot_base_url_override(provider, &copilot_state).await?;
-    let claude_api_format_override = resolve_claude_api_format_override(
-        &app_type,
-        provider,
-        &config,
-        &copilot_state,
-        auth_override.as_ref(),
-    )
-    .await?;
-    let result = StreamCheckService::check_with_retry(
-        &app_type,
-        provider,
-        &config,
-        auth_override,
-        base_url_override,
-        claude_api_format_override,
-    )
-    .await?;
+    let result =
+        StreamCheckService::check_with_retry(&app_type, provider, &config, base_url_override)
+            .await?;
 
     // 记录日志
     let _ =
@@ -54,7 +44,7 @@ pub async fn stream_check_provider(
     Ok(result)
 }
 
-/// 批量流式健康检查
+/// 批量连通性检查
 #[tauri::command]
 pub async fn stream_check_all_providers(
     state: State<'_, AppState>,
@@ -65,7 +55,6 @@ pub async fn stream_check_all_providers(
     let config = state.db.get_stream_check_config()?;
     let providers = state.db.get_all_providers(app_type.as_str())?;
 
-    let mut results = Vec::new();
     let allowed_ids: Option<HashSet<String>> = if proxy_targets_only {
         let mut ids = HashSet::new();
         if let Ok(Some(current_id)) = state.db.get_current_provider(app_type.as_str()) {
@@ -81,6 +70,7 @@ pub async fn stream_check_all_providers(
         None
     };
 
+    let mut results = Vec::new();
     for (id, provider) in providers {
         if let Some(ids) = &allowed_ids {
             if !ids.contains(&id) {
@@ -88,54 +78,22 @@ pub async fn stream_check_all_providers(
             }
         }
 
-        let auth_override = resolve_copilot_auth_override(&provider, &copilot_state).await?;
         let base_url_override =
             resolve_copilot_base_url_override(&provider, &copilot_state).await?;
-        let claude_api_format_override = resolve_claude_api_format_override(
-            &app_type,
-            &provider,
-            &config,
-            &copilot_state,
-            auth_override.as_ref(),
-        )
-        .await
-        .unwrap_or_else(|e| {
-            log::warn!(
-                "[StreamCheck] Failed to resolve Claude API format override for {}: {}",
-                provider.id,
-                e
-            );
-            None
-        });
-        let result = StreamCheckService::check_with_retry(
-            &app_type,
-            &provider,
-            &config,
-            auth_override,
-            base_url_override,
-            claude_api_format_override,
-        )
-        .await
-        .unwrap_or_else(|e| {
-            let (http_status, message) = match &e {
-                crate::error::AppError::HttpStatus { status, .. } => (
-                    Some(*status),
-                    StreamCheckService::classify_http_status(*status).to_string(),
-                ),
-                _ => (None, e.to_string()),
-            };
-            StreamCheckResult {
-                status: HealthStatus::Failed,
-                success: false,
-                message,
-                response_time_ms: None,
-                http_status,
-                model_used: String::new(),
-                tested_at: chrono::Utc::now().timestamp(),
-                retry_count: 0,
-                error_category: None,
-            }
-        });
+        let result =
+            StreamCheckService::check_with_retry(&app_type, &provider, &config, base_url_override)
+                .await
+                .unwrap_or_else(|e| StreamCheckResult {
+                    status: HealthStatus::Failed,
+                    success: false,
+                    message: e.to_string(),
+                    response_time_ms: None,
+                    http_status: None,
+                    model_used: String::new(),
+                    tested_at: chrono::Utc::now().timestamp(),
+                    retry_count: 0,
+                    error_category: None,
+                });
 
         let _ = state
             .db
@@ -147,13 +105,13 @@ pub async fn stream_check_all_providers(
     Ok(results)
 }
 
-/// 获取流式检查配置
+/// 获取连通性检查配置
 #[tauri::command]
 pub fn get_stream_check_config(state: State<'_, AppState>) -> Result<StreamCheckConfig, AppError> {
     state.db.get_stream_check_config()
 }
 
-/// 保存流式检查配置
+/// 保存连通性检查配置
 #[tauri::command]
 pub fn save_stream_check_config(
     state: State<'_, AppState>,
@@ -162,39 +120,8 @@ pub fn save_stream_check_config(
     state.db.save_stream_check_config(&config)
 }
 
-async fn resolve_copilot_auth_override(
-    provider: &crate::provider::Provider,
-    copilot_state: &State<'_, CopilotAuthState>,
-) -> Result<Option<crate::proxy::providers::AuthInfo>, AppError> {
-    let is_copilot = is_copilot_provider(provider);
-
-    if !is_copilot {
-        return Ok(None);
-    }
-
-    let auth_manager = copilot_state.0.read().await;
-    let account_id = provider
-        .meta
-        .as_ref()
-        .and_then(|meta| meta.managed_account_id_for("github_copilot"));
-
-    let token = match account_id.as_deref() {
-        Some(id) => auth_manager
-            .get_valid_token_for_account(id)
-            .await
-            .map_err(|e| AppError::Message(format!("GitHub Copilot 认证失败: {e}")))?,
-        None => auth_manager
-            .get_valid_token()
-            .await
-            .map_err(|e| AppError::Message(format!("GitHub Copilot 认证失败: {e}")))?,
-    };
-
-    Ok(Some(crate::proxy::providers::AuthInfo::new(
-        token,
-        crate::proxy::providers::AuthStrategy::GitHubCopilot,
-    )))
-}
-
+/// Copilot 供应商的 base_url 需要从 OAuth 管理器动态解析（按账号或默认端点）。
+/// `is_full_url` 的供应商已是完整地址，无需解析。
 async fn resolve_copilot_base_url_override(
     provider: &crate::provider::Provider,
     copilot_state: &State<'_, CopilotAuthState>,
@@ -238,54 +165,6 @@ fn is_copilot_provider(provider: &crate::provider::Provider) -> bool {
             .unwrap_or(false)
 }
 
-async fn resolve_claude_api_format_override(
-    app_type: &AppType,
-    provider: &crate::provider::Provider,
-    config: &StreamCheckConfig,
-    copilot_state: &State<'_, CopilotAuthState>,
-    auth_override: Option<&crate::proxy::providers::AuthInfo>,
-) -> Result<Option<String>, AppError> {
-    if *app_type != AppType::Claude {
-        return Ok(None);
-    }
-
-    let is_copilot = auth_override
-        .map(|auth| auth.strategy == crate::proxy::providers::AuthStrategy::GitHubCopilot)
-        .unwrap_or(false);
-    if !is_copilot {
-        return Ok(None);
-    }
-
-    let model_id = StreamCheckService::resolve_effective_test_model(app_type, provider, config);
-    let auth_manager = copilot_state.0.read().await;
-    let account_id = provider
-        .meta
-        .as_ref()
-        .and_then(|meta| meta.managed_account_id_for("github_copilot"));
-
-    let vendor_result = match account_id.as_deref() {
-        Some(id) => {
-            auth_manager
-                .get_model_vendor_for_account(id, &model_id)
-                .await
-        }
-        None => auth_manager.get_model_vendor(&model_id).await,
-    };
-
-    let api_format = match vendor_result {
-        Ok(Some(vendor)) if vendor.eq_ignore_ascii_case("openai") => "openai_responses",
-        Ok(Some(_)) | Ok(None) => "openai_chat",
-        Err(err) => {
-            log::warn!(
-                "[StreamCheck] Failed to resolve Copilot model vendor for {model_id}: {err}. Falling back to chat/completions"
-            );
-            "openai_chat"
-        }
-    };
-
-    Ok(Some(api_format.to_string()))
-}
-
 #[cfg(test)]
 mod tests {
     use super::is_copilot_provider;

src-tauri/src/provider.rs

@@ -287,21 +287,15 @@ pub struct UsageResult {
     pub error: Option<String>,
 }
 
-/// 供应商单独的模型测试配置
+/// 供应商单独的连通检测配置
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct ProviderTestConfig {
     /// 是否启用单独配置（false 时使用全局配置）
     #[serde(default)]
     pub enabled: bool,
-    /// 测试用的模型名称（覆盖全局配置）
-    #[serde(rename = "testModel", skip_serializing_if = "Option::is_none")]
-    pub test_model: Option<String>,
     /// 超时时间（秒）
     #[serde(rename = "timeoutSecs", skip_serializing_if = "Option::is_none")]
     pub timeout_secs: Option<u64>,
-    /// 测试提示词
-    #[serde(rename = "testPrompt", skip_serializing_if = "Option::is_none")]
-    pub test_prompt: Option<String>,
     /// 降级阈值（毫秒）
     #[serde(
         rename = "degradedThresholdMs",

src-tauri/src/proxy/providers/mod.rs

@@ -48,8 +48,7 @@ pub use claude::{
 pub use codex::CodexAdapter;
 pub use codex::{
     apply_codex_chat_upstream_model, codex_provider_upstream_model,
-    codex_provider_uses_chat_completions, is_origin_only_url, resolve_codex_chat_reasoning_config,
-    should_convert_codex_responses_to_chat,
+    resolve_codex_chat_reasoning_config, should_convert_codex_responses_to_chat,
 };
 pub use gemini::GeminiAdapter;
 

src-tauri/src/proxy/providers/transform.rs

@@ -112,6 +112,10 @@ pub fn resolve_reasoning_effort(body: &Value) -> Option<&'static str> {
 }
 
 /// Anthropic 请求 → OpenAI Chat Completions 请求
+///
+/// 转换工具库 API：当前无生产调用方（连通性检查不再发真实请求，曾是其唯一 crate 内
+/// 消费者），但保留其转换逻辑与下方测试套件，供代理转换路径复用 / 未来接线。
+#[allow(dead_code)]
 pub fn anthropic_to_openai(body: Value) -> Result<Value, ProxyError> {
     anthropic_to_openai_with_reasoning_content(body, false)
 }

src-tauri/src/proxy/providers/transform_gemini.rs

@@ -39,6 +39,11 @@ pub(crate) fn is_synthesized_tool_call_id(id: &str) -> bool {
     id.starts_with(SYNTHESIZED_ID_PREFIX)
 }
 
+/// Anthropic 请求 → Gemini 原生请求。
+///
+/// 转换工具库 API：当前无生产调用方（连通性检查不再发真实请求，曾是其唯一 crate 内
+/// 消费者），但保留其转换逻辑与下方测试套件，供代理转换路径复用 / 未来接线。
+#[allow(dead_code)]
 pub fn anthropic_to_gemini(body: Value) -> Result<Value, ProxyError> {
     anthropic_to_gemini_with_shadow(body, None, None, None)
 }