Feat/provider individual config (#663)

* refactor(ui): simplify UpdateBadge to minimal dot indicator

* feat(provider): add individual test and proxy config for providers

Add support for provider-specific model test and proxy configurations:

- Add ProviderTestConfig and ProviderProxyConfig types in Rust and TypeScript
- Create ProviderAdvancedConfig component with collapsible panels
- Update stream_check service to merge provider config with global config
- Proxy config UI follows global proxy style (single URL input)

Provider-level configs stored in meta field, no database schema changes needed.

* feat(ui): add failover toggle and improve proxy controls

- Add FailoverToggle component with slide animation
- Simplify ProxyToggle style to match FailoverToggle
- Add usage statistics button when proxy is active
- Fix i18n parameter passing for failover messages
- Add missing failover translation keys (inQueue, addQueue, priority)
- Replace AboutSection icon with app logo

* fix(proxy): support system proxy fallback and provider-level proxy config

- Remove no_proxy() calls in http_client.rs to allow system proxy fallback
- Add get_for_provider() to build HTTP client with provider-specific proxy
- Update forwarder.rs and stream_check.rs to use provider proxy config
- Fix EditProviderDialog.tsx to include provider.meta in useMemo deps
- Add useEffect in ProviderAdvancedConfig.tsx to sync expand state

Fixes #636
Fixes #583

* fix(ui): sync toast theme with app setting

* feat(settings): add log config management

Fixes #612
Fixes #514

* fix(proxy): increase request body size limit to 200MB

Fixes #666

* docs(proxy): update timeout config descriptions and defaults

Fixes #612

* fix(proxy): filter x-goog-api-key header to prevent duplication

* fix(proxy): prevent proxy recursion when system proxy points to localhost

Detect if HTTP_PROXY, HTTPS_PROXY, or ALL_PROXY environment variables
point to loopback addresses (localhost, 127.0.0.1), and bypass system
proxy in such cases to avoid infinite request loops.

* fix(i18n): add providerAdvanced i18n keys and fix failover toast parameter

- Add providerAdvanced.* i18n keys to en.json, zh.json, and ja.json
- Fix failover toggleFailed toast to pass detail parameter
- Remove Chinese fallback text from UI for English/Japanese users

* fix(tray): restore tray-provider events and enable Auto failover properly

- Emit provider-switched event on tray provider click (backward compatibility)
- Auto button now: starts proxy, takes over live config, enables failover

* fix(log): enable dynamic log level and single file mode

- Initialize log at Trace level for dynamic adjustment
- Change rotation strategy to KeepSome(1) for single file
- Set max file size to 1GB
- Delete old log file on startup for clean start

* fix(tray): fix clippy uninlined format args warning

Use inline format arguments: {app_type_str} instead of {}

* fix(provider): allow typing :// in endpoint URL inputs

Change input type from "url" to "text" to prevent browser
URL validation from blocking :// input.

Closes #681

* fix(stream-check): use Gemini native streaming API format

- Change endpoint from OpenAI-compatible to native streamGenerateContent
- Add alt=sse parameter for SSE format response
- Use x-goog-api-key header instead of Bearer token
- Convert request body to Gemini contents/parts format

* feat(proxy): add request logging for debugging

Add debug logs for outgoing requests including URL and body content
with byte size, matching the existing response logging format.

* fix(log): prevent usize underflow in KeepSome rotation strategy

KeepSome(n) internally computes n-2, so n=1 causes underflow.
Use KeepSome(2) as the minimum safe value.

src-tauri/src/services/stream_check.rs

@@ -78,15 +78,19 @@ pub struct StreamCheckService;
 
 impl StreamCheckService {
     /// 执行流式健康检查（带重试）
+    ///
+    /// 如果 Provider 配置了单独的测试配置（meta.testConfig），则使用该配置覆盖全局配置
     pub async fn check_with_retry(
         app_type: &AppType,
         provider: &Provider,
         config: &StreamCheckConfig,
     ) -> Result<StreamCheckResult, AppError> {
+        // 合并供应商单独配置和全局配置
+        let effective_config = Self::merge_provider_config(provider, config);
         let mut last_result = None;
 
-        for attempt in 0..=config.max_retries {
-            let result = Self::check_once(app_type, provider, config).await;
+        for attempt in 0..=effective_config.max_retries {
+            let result = Self::check_once(app_type, provider, &effective_config).await;
 
             match &result {
                 Ok(r) if r.success => {
@@ -97,7 +101,7 @@ impl StreamCheckService {
                 }
                 Ok(r) => {
                     // 失败但非异常，判断是否重试
-                    if Self::should_retry(&r.message) && attempt < config.max_retries {
+                    if Self::should_retry(&r.message) && attempt < effective_config.max_retries {
                         last_result = Some(r.clone());
                         continue;
                     }
@@ -107,7 +111,8 @@ impl StreamCheckService {
                     });
                 }
                 Err(e) => {
-                    if Self::should_retry(&e.to_string()) && attempt < config.max_retries {
+                    if Self::should_retry(&e.to_string()) && attempt < effective_config.max_retries
+                    {
                         continue;
                     }
                     return Err(AppError::Message(e.to_string()));
@@ -123,10 +128,51 @@ impl StreamCheckService {
             http_status: None,
             model_used: String::new(),
             tested_at: chrono::Utc::now().timestamp(),
-            retry_count: config.max_retries,
+            retry_count: effective_config.max_retries,
         }))
     }
 
+    /// 合并供应商单独配置和全局配置
+    ///
+    /// 如果供应商配置了 meta.testConfig 且 enabled 为 true，则使用供应商配置覆盖全局配置
+    fn merge_provider_config(
+        provider: &Provider,
+        global_config: &StreamCheckConfig,
+    ) -> StreamCheckConfig {
+        let test_config = provider
+            .meta
+            .as_ref()
+            .and_then(|m| m.test_config.as_ref())
+            .filter(|tc| tc.enabled);
+
+        match test_config {
+            Some(tc) => StreamCheckConfig {
+                timeout_secs: tc.timeout_secs.unwrap_or(global_config.timeout_secs),
+                max_retries: tc.max_retries.unwrap_or(global_config.max_retries),
+                degraded_threshold_ms: tc
+                    .degraded_threshold_ms
+                    .unwrap_or(global_config.degraded_threshold_ms),
+                claude_model: tc
+                    .test_model
+                    .clone()
+                    .unwrap_or_else(|| global_config.claude_model.clone()),
+                codex_model: tc
+                    .test_model
+                    .clone()
+                    .unwrap_or_else(|| global_config.codex_model.clone()),
+                gemini_model: tc
+                    .test_model
+                    .clone()
+                    .unwrap_or_else(|| global_config.gemini_model.clone()),
+                test_prompt: tc
+                    .test_prompt
+                    .clone()
+                    .unwrap_or_else(|| global_config.test_prompt.clone()),
+            },
+            None => global_config.clone(),
+        }
+    }
+
     /// 单次流式检查
     async fn check_once(
         app_type: &AppType,
@@ -144,8 +190,9 @@ impl StreamCheckService {
             .extract_auth(provider)
             .ok_or_else(|| AppError::Message("API Key not found".to_string()))?;
 
-        // 使用全局 HTTP 客户端（已包含代理配置）
-        let client = crate::proxy::http_client::get();
+        // 获取 HTTP 客户端：优先使用供应商单独代理配置，否则使用全局客户端
+        let proxy_config = provider.meta.as_ref().and_then(|m| m.proxy_config.as_ref());
+        let client = crate::proxy::http_client::get_for_provider(proxy_config);
         let request_timeout = std::time::Duration::from_secs(config.timeout_secs);
 
         let model_to_test = Self::resolve_test_model(app_type, provider, config);
@@ -389,6 +436,8 @@ impl StreamCheckService {
     }
 
     /// Gemini 流式检查
+    ///
+    /// 使用 Gemini 原生 API 格式 (streamGenerateContent)
     async fn check_gemini_stream(
         client: &Client,
         base_url: &str,
@@ -398,20 +447,28 @@ impl StreamCheckService {
         timeout: std::time::Duration,
     ) -> Result<(u16, String), AppError> {
         let base = base_url.trim_end_matches('/');
-        let url = format!("{base}/v1/chat/completions");
+        // Gemini 原生 API: /v1beta/models/{model}:streamGenerateContent?alt=sse
+        // 智能处理 /v1beta 路径：如果 base_url 不包含版本路径，则添加 /v1beta
+        // alt=sse 参数使 API 返回 SSE 格式（text/event-stream）而非 JSON 数组
+        let url = if base.contains("/v1beta") || base.contains("/v1/") {
+            format!("{base}/models/{model}:streamGenerateContent?alt=sse")
+        } else {
+            format!("{base}/v1beta/models/{model}:streamGenerateContent?alt=sse")
+        };
 
+        // Gemini 原生请求体格式
         let body = json!({
-            "model": model,
-            "messages": [{ "role": "user", "content": test_prompt }],
-            "max_tokens": 1,
-            "temperature": 0,
-            "stream": true
+            "contents": [{
+                "role": "user",
+                "parts": [{ "text": test_prompt }]
+            }]
         });
 
         let response = client
             .post(&url)
-            .header("Authorization", format!("Bearer {}", auth.api_key))
+            .header("x-goog-api-key", &auth.api_key)
             .header("Content-Type", "application/json")
+            .header("Accept", "text/event-stream")
             .timeout(timeout)
             .json(&body)
             .send()