fix(proxy): fix double encoding issue in proxy auth and add debug logs

- Remove encodeURIComponent in mergeAuth() since URL object's
  username/password setters already do percent-encoding automatically
- Add GP-010 debug log for database read operations
- Add GP-011 debug log to track incoming URL info (length, has_auth)
- Fix username.trim() in fallback branch for consistent behavior

src-tauri/src/commands/global_proxy.rs

@@ -0,0 +1,247 @@
+//! 全局出站代理相关命令
+//!
+//! 提供获取、设置和测试全局代理的 Tauri 命令。
+
+use crate::proxy::http_client;
+use crate::store::AppState;
+use serde::Serialize;
+use std::net::{Ipv4Addr, SocketAddrV4, TcpStream};
+use std::time::{Duration, Instant};
+
+/// 获取全局代理 URL
+///
+/// 返回当前配置的代理 URL，null 表示直连。
+#[tauri::command]
+pub fn get_global_proxy_url(state: tauri::State<'_, AppState>) -> Result<Option<String>, String> {
+    let result = state.db.get_global_proxy_url().map_err(|e| e.to_string())?;
+    log::debug!(
+        "[GlobalProxy] [GP-010] Read from database: {}",
+        result
+            .as_ref()
+            .map(|u| http_client::mask_url(u))
+            .unwrap_or_else(|| "None".to_string())
+    );
+    Ok(result)
+}
+
+/// 设置全局代理 URL
+///
+/// - 传入非空字符串：启用代理
+/// - 传入空字符串：清除代理（直连）
+///
+/// 执行顺序：先验证 → 写 DB → 再应用
+/// 这样确保 DB 写失败时不会出现运行态与持久化不一致的问题
+#[tauri::command]
+pub fn set_global_proxy_url(state: tauri::State<'_, AppState>, url: String) -> Result<(), String> {
+    // 调试：显示接收到的 URL 信息（不包含敏感内容）
+    let has_auth = url.contains('@') && (url.starts_with("http://") || url.starts_with("socks"));
+    log::debug!(
+        "[GlobalProxy] [GP-011] Received URL: length={}, has_auth={}",
+        url.len(),
+        has_auth
+    );
+
+    let url_opt = if url.trim().is_empty() {
+        None
+    } else {
+        Some(url.as_str())
+    };
+
+    // 1. 先验证代理配置是否有效（不应用）
+    http_client::validate_proxy(url_opt)?;
+
+    // 2. 验证成功后保存到数据库
+    state
+        .db
+        .set_global_proxy_url(url_opt)
+        .map_err(|e| e.to_string())?;
+
+    // 3. DB 写入成功后再应用到运行态
+    http_client::apply_proxy(url_opt)?;
+
+    log::info!(
+        "[GlobalProxy] [GP-009] Configuration updated: {}",
+        url_opt
+            .map(http_client::mask_url)
+            .unwrap_or_else(|| "direct connection".to_string())
+    );
+
+    Ok(())
+}
+
+/// 代理测试结果
+#[derive(Debug, Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ProxyTestResult {
+    /// 是否连接成功
+    pub success: bool,
+    /// 延迟（毫秒）
+    pub latency_ms: u64,
+    /// 错误信息
+    pub error: Option<String>,
+}
+
+/// 测试代理连接
+///
+/// 通过指定的代理 URL 发送测试请求，返回连接结果和延迟。
+/// 使用多个测试目标，任一成功即认为代理可用。
+#[tauri::command]
+pub async fn test_proxy_url(url: String) -> Result<ProxyTestResult, String> {
+    if url.trim().is_empty() {
+        return Err("Proxy URL is empty".to_string());
+    }
+
+    let start = Instant::now();
+
+    // 构建带代理的临时客户端
+    let proxy = reqwest::Proxy::all(&url).map_err(|e| format!("Invalid proxy URL: {e}"))?;
+
+    let client = reqwest::Client::builder()
+        .proxy(proxy)
+        .timeout(std::time::Duration::from_secs(10))
+        .connect_timeout(std::time::Duration::from_secs(10))
+        .build()
+        .map_err(|e| format!("Failed to build client: {e}"))?;
+
+    // 使用多个测试目标，提高兼容性
+    // 优先使用 httpbin（专门用于 HTTP 测试），回退到其他公共端点
+    let test_urls = [
+        "https://httpbin.org/get",
+        "https://www.google.com",
+        "https://api.anthropic.com",
+    ];
+
+    let mut last_error = None;
+
+    for test_url in test_urls {
+        match client.head(test_url).send().await {
+            Ok(resp) => {
+                let latency = start.elapsed().as_millis() as u64;
+                log::debug!(
+                    "[GlobalProxy] Test successful: {} -> {} via {} ({}ms)",
+                    http_client::mask_url(&url),
+                    test_url,
+                    resp.status(),
+                    latency
+                );
+                return Ok(ProxyTestResult {
+                    success: true,
+                    latency_ms: latency,
+                    error: None,
+                });
+            }
+            Err(e) => {
+                log::debug!("[GlobalProxy] Test to {test_url} failed: {e}");
+                last_error = Some(e);
+            }
+        }
+    }
+
+    // 所有测试目标都失败
+    let latency = start.elapsed().as_millis() as u64;
+    let error_msg = last_error
+        .map(|e| e.to_string())
+        .unwrap_or_else(|| "All test targets failed".to_string());
+
+    log::debug!(
+        "[GlobalProxy] Test failed: {} -> {} ({}ms)",
+        http_client::mask_url(&url),
+        error_msg,
+        latency
+    );
+
+    Ok(ProxyTestResult {
+        success: false,
+        latency_ms: latency,
+        error: Some(error_msg),
+    })
+}
+
+/// 获取当前出站代理状态
+///
+/// 返回当前是否启用了出站代理以及代理 URL。
+#[tauri::command]
+pub fn get_upstream_proxy_status() -> UpstreamProxyStatus {
+    let url = http_client::get_current_proxy_url();
+    UpstreamProxyStatus {
+        enabled: url.is_some(),
+        proxy_url: url,
+    }
+}
+
+/// 出站代理状态信息
+#[derive(Debug, Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct UpstreamProxyStatus {
+    /// 是否启用代理
+    pub enabled: bool,
+    /// 代理 URL
+    pub proxy_url: Option<String>,
+}
+
+/// 检测到的代理信息
+#[derive(Debug, Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct DetectedProxy {
+    /// 代理 URL
+    pub url: String,
+    /// 代理类型 (http/socks5)
+    pub proxy_type: String,
+    /// 端口
+    pub port: u16,
+}
+
+/// 常见代理端口配置
+/// 格式：(端口, 主要类型, 是否同时支持 http 和 socks5)
+/// 对于 mixed 端口，会同时返回两种协议供用户选择
+const PROXY_PORTS: &[(u16, &str, bool)] = &[
+    (7890, "http", true),     // Clash (mixed mode)
+    (7891, "socks5", false),  // Clash SOCKS only
+    (1080, "socks5", false),  // 通用 SOCKS5
+    (8080, "http", false),    // 通用 HTTP
+    (8888, "http", false),    // Charles/Fiddler
+    (3128, "http", false),    // Squid
+    (10808, "socks5", false), // V2Ray SOCKS
+    (10809, "http", false),   // V2Ray HTTP
+];
+
+/// 扫描本地代理
+///
+/// 检测常见端口是否有代理服务在运行。
+/// 使用异步任务避免阻塞 UI 线程。
+#[tauri::command]
+pub async fn scan_local_proxies() -> Vec<DetectedProxy> {
+    // 使用 spawn_blocking 避免阻塞主线程
+    tokio::task::spawn_blocking(|| {
+        let mut found = Vec::new();
+
+        for &(port, primary_type, is_mixed) in PROXY_PORTS {
+            let addr = SocketAddrV4::new(Ipv4Addr::LOCALHOST, port);
+            if TcpStream::connect_timeout(&addr.into(), Duration::from_millis(100)).is_ok() {
+                // 添加主要类型
+                found.push(DetectedProxy {
+                    url: format!("{primary_type}://127.0.0.1:{port}"),
+                    proxy_type: primary_type.to_string(),
+                    port,
+                });
+                // 对于 mixed 端口，同时添加另一种协议
+                if is_mixed {
+                    let alt_type = if primary_type == "http" {
+                        "socks5"
+                    } else {
+                        "http"
+                    };
+                    found.push(DetectedProxy {
+                        url: format!("{alt_type}://127.0.0.1:{port}"),
+                        proxy_type: alt_type.to_string(),
+                        port,
+                    });
+                }
+            }
+        }
+
+        found
+    })
+    .await
+    .unwrap_or_default()
+}

src-tauri/src/commands/misc.rs

@@ -91,11 +91,8 @@ pub async fn get_tool_versions() -> Result<Vec<ToolVersion>, String> {
     let tools = vec!["claude", "codex", "gemini"];
     let mut results = Vec::new();
 
-    // 用于获取远程版本的 client
-    let client = reqwest::Client::builder()
-        .user_agent("cc-switch/1.0")
-        .build()
-        .map_err(|e| e.to_string())?;
+    // 使用全局 HTTP 客户端（已包含代理配置）
+    let client = crate::proxy::http_client::get();
 
     for tool in tools {
         // 1. 获取本地版本 - 先尝试直接执行，失败则扫描常见路径

src-tauri/src/commands/mod.rs

@@ -4,6 +4,7 @@ mod config;
 mod deeplink;
 mod env;
 mod failover;
+mod global_proxy;
 mod import_export;
 mod mcp;
 mod misc;
@@ -20,6 +21,7 @@ pub use config::*;
 pub use deeplink::*;
 pub use env::*;
 pub use failover::*;
+pub use global_proxy::*;
 pub use import_export::*;
 pub use mcp::*;
 pub use misc::*;

src-tauri/src/database/dao/settings.rs

@@ -63,6 +63,41 @@ impl Database {
         }
     }
 
+    // --- 全局出站代理 ---
+
+    /// 全局代理 URL 的存储键名
+    const GLOBAL_PROXY_URL_KEY: &'static str = "global_proxy_url";
+
+    /// 获取全局出站代理 URL
+    ///
+    /// 返回 None 表示未配置或已清除代理（直连）
+    /// 返回 Some(url) 表示已配置代理
+    pub fn get_global_proxy_url(&self) -> Result<Option<String>, AppError> {
+        self.get_setting(Self::GLOBAL_PROXY_URL_KEY)
+    }
+
+    /// 设置全局出站代理 URL
+    ///
+    /// - 传入非空字符串：启用代理
+    /// - 传入空字符串或 None：清除代理设置（直连）
+    pub fn set_global_proxy_url(&self, url: Option<&str>) -> Result<(), AppError> {
+        match url {
+            Some(u) if !u.trim().is_empty() => {
+                self.set_setting(Self::GLOBAL_PROXY_URL_KEY, u.trim())
+            }
+            _ => {
+                // 清除代理设置
+                let conn = lock_conn!(self.conn);
+                conn.execute(
+                    "DELETE FROM settings WHERE key = ?1",
+                    params![Self::GLOBAL_PROXY_URL_KEY],
+                )
+                .map_err(|e| AppError::Database(e.to_string()))?;
+                Ok(())
+            }
+        }
+    }
+
     // --- 代理接管状态管理（已废弃，使用 proxy_config.enabled 替代）---
 
     /// 获取指定应用的代理接管状态

src-tauri/src/lib.rs

@@ -644,6 +644,37 @@ pub fn run() {
             let skill_service = SkillService::new();
             app.manage(commands::skill::SkillServiceState(Arc::new(skill_service)));
 
+            // 初始化全局出站代理 HTTP 客户端
+            {
+                let db = &app.state::<AppState>().db;
+                let proxy_url = db.get_global_proxy_url().ok().flatten();
+
+                if let Err(e) = crate::proxy::http_client::init(proxy_url.as_deref()) {
+                    log::error!(
+                        "[GlobalProxy] [GP-005] Failed to initialize with saved config: {e}"
+                    );
+
+                    // 清除无效的代理配置
+                    if proxy_url.is_some() {
+                        log::warn!(
+                            "[GlobalProxy] [GP-006] Clearing invalid proxy config from database"
+                        );
+                        if let Err(clear_err) = db.set_global_proxy_url(None) {
+                            log::error!(
+                                "[GlobalProxy] [GP-007] Failed to clear invalid config: {clear_err}"
+                            );
+                        }
+                    }
+
+                    // 使用直连模式重新初始化
+                    if let Err(fallback_err) = crate::proxy::http_client::init(None) {
+                        log::error!(
+                            "[GlobalProxy] [GP-008] Failed to initialize direct connection: {fallback_err}"
+                        );
+                    }
+                }
+            }
+
             // 异常退出恢复 + 代理状态自动恢复
             let app_handle = app.handle().clone();
             tauri::async_runtime::spawn(async move {
@@ -841,6 +872,12 @@ pub fn run() {
             commands::upsert_universal_provider,
             commands::delete_universal_provider,
             commands::sync_universal_provider,
+            // Global upstream proxy
+            commands::get_global_proxy_url,
+            commands::set_global_proxy_url,
+            commands::test_proxy_url,
+            commands::get_upstream_proxy_status,
+            commands::scan_local_proxies,
         ]);
 
     let app = builder

src-tauri/src/proxy/forwarder.rs

@@ -12,10 +12,9 @@ use super::{
     ProxyError,
 };
 use crate::{app_config::AppType, provider::Provider};
-use reqwest::{Client, Response};
+use reqwest::Response;
 use serde_json::Value;
 use std::sync::Arc;
-use std::time::Duration;
 use tokio::sync::RwLock;
 
 /// Headers 黑名单 - 不透传到上游的 Headers
@@ -81,8 +80,6 @@ pub struct ForwardError {
 }
 
 pub struct RequestForwarder {
-    client: Option<Client>,
-    client_init_error: Option<String>,
     /// 共享的 ProviderRouter（持有熔断器状态）
     router: Arc<ProviderRouter>,
     status: Arc<RwLock<ProxyStatus>>,
@@ -93,6 +90,8 @@ pub struct RequestForwarder {
     app_handle: Option<tauri::AppHandle>,
     /// 请求开始时的"当前供应商 ID"（用于判断是否需要同步 UI/托盘）
     current_provider_id_at_start: String,
+    /// 非流式请求超时（秒）
+    non_streaming_timeout: std::time::Duration,
 }
 
 impl RequestForwarder {
@@ -108,51 +107,14 @@ impl RequestForwarder {
         _streaming_first_byte_timeout: u64,
         _streaming_idle_timeout: u64,
     ) -> Self {
-        // 全局超时设置为 1800 秒（30 分钟），确保业务层超时配置能正常工作
-        // 参考 Claude Code Hub 的 undici 全局超时设计
-        const GLOBAL_TIMEOUT_SECS: u64 = 1800;
-
-        let timeout_secs = if non_streaming_timeout > 0 {
-            non_streaming_timeout
-        } else {
-            GLOBAL_TIMEOUT_SECS
-        };
-
-        // 注意：这里不能用 expect/unwrap。
-        // release 配置为 panic=abort，一旦 build 失败会导致整个应用闪退。
-        // 常见原因：用户环境变量里存在不合法/不支持的代理（HTTP(S)_PROXY/ALL_PROXY 等）。
-        let (client, client_init_error) = match Client::builder()
-            .timeout(Duration::from_secs(timeout_secs))
-            .build()
-        {
-            Ok(client) => (Some(client), None),
-            Err(e) => {
-                // 降级：忽略系统/环境代理，避免因代理配置问题导致整个应用崩溃
-                match Client::builder()
-                    .timeout(Duration::from_secs(timeout_secs))
-                    .no_proxy()
-                    .build()
-                {
-                    Ok(client) => (Some(client), Some(e.to_string())),
-                    Err(fallback_err) => (
-                        None,
-                        Some(format!(
-                            "Failed to create HTTP client: {e}; no_proxy fallback failed: {fallback_err}"
-                        )),
-                    ),
-                }
-            }
-        };
-
         Self {
-            client,
-            client_init_error,
             router,
             status,
             current_providers,
             failover_manager,
             app_handle,
             current_provider_id_at_start,
+            non_streaming_timeout: std::time::Duration::from_secs(non_streaming_timeout),
         }
     }
 
@@ -416,16 +378,17 @@ impl RequestForwarder {
         // 默认使用空白名单，过滤所有 _ 前缀字段
         let filtered_body = filter_private_params_with_whitelist(request_body, &[]);
 
-        // 构建请求
-        let client = self.client.as_ref().ok_or_else(|| {
-            ProxyError::ForwardFailed(
-                self.client_init_error
-                    .clone()
-                    .unwrap_or_else(|| "HTTP client is not initialized".to_string()),
-            )
-        })?;
+        // 每次请求时获取最新的全局 HTTP 客户端（支持热更新代理配置）
+        let client = super::http_client::get();
         let mut request = client.post(&url);
 
+        // 只有当 timeout > 0 时才设置请求超时
+        // Duration::ZERO 在 reqwest 中表示"立刻超时"而不是"禁用超时"
+        // 故障转移关闭时会传入 0，此时应该使用 client 的默认超时（600秒）
+        if !self.non_streaming_timeout.is_zero() {
+            request = request.timeout(self.non_streaming_timeout);
+        }
+
         // 过滤黑名单 Headers，保护隐私并避免冲突
         for (key, value) in headers {
             if HEADER_BLACKLIST

src-tauri/src/proxy/http_client.rs

@@ -0,0 +1,301 @@
+//! 全局 HTTP 客户端模块
+//!
+//! 提供支持全局代理配置的 HTTP 客户端。
+//! 所有需要发送 HTTP 请求的模块都应使用此模块提供的客户端。
+
+use once_cell::sync::OnceCell;
+use reqwest::Client;
+use std::sync::RwLock;
+use std::time::Duration;
+
+/// 全局 HTTP 客户端实例
+static GLOBAL_CLIENT: OnceCell<RwLock<Client>> = OnceCell::new();
+
+/// 当前代理 URL（用于日志和状态查询）
+static CURRENT_PROXY_URL: OnceCell<RwLock<Option<String>>> = OnceCell::new();
+
+/// 初始化全局 HTTP 客户端
+///
+/// 应在应用启动时调用一次。
+///
+/// # Arguments
+/// * `proxy_url` - 代理 URL，如 `http://127.0.0.1:7890` 或 `socks5://127.0.0.1:1080`
+///   传入 None 或空字符串表示直连
+pub fn init(proxy_url: Option<&str>) -> Result<(), String> {
+    let effective_url = proxy_url.filter(|s| !s.trim().is_empty());
+    let client = build_client(effective_url)?;
+
+    // 尝试初始化全局客户端，如果已存在则记录警告并使用 apply_proxy 更新
+    if GLOBAL_CLIENT.set(RwLock::new(client.clone())).is_err() {
+        log::warn!(
+            "[GlobalProxy] [GP-003] Already initialized, updating instead: {}",
+            effective_url
+                .map(mask_url)
+                .unwrap_or_else(|| "direct connection".to_string())
+        );
+        // 已初始化，改用 apply_proxy 更新
+        return apply_proxy(proxy_url);
+    }
+
+    // 初始化代理 URL 记录
+    let _ = CURRENT_PROXY_URL.set(RwLock::new(effective_url.map(|s| s.to_string())));
+
+    log::info!(
+        "[GlobalProxy] Initialized: {}",
+        effective_url
+            .map(mask_url)
+            .unwrap_or_else(|| "direct connection".to_string())
+    );
+
+    Ok(())
+}
+
+/// 验证代理配置（不应用）
+///
+/// 只验证代理 URL 是否有效，不实际更新全局客户端。
+/// 用于在持久化之前验证配置的有效性。
+///
+/// # Arguments
+/// * `proxy_url` - 代理 URL，None 或空字符串表示直连
+///
+/// # Returns
+/// 验证成功返回 Ok(())，失败返回错误信息
+pub fn validate_proxy(proxy_url: Option<&str>) -> Result<(), String> {
+    let effective_url = proxy_url.filter(|s| !s.trim().is_empty());
+    // 只调用 build_client 来验证，但不应用
+    build_client(effective_url)?;
+    Ok(())
+}
+
+/// 应用代理配置（假设已验证）
+///
+/// 直接应用代理配置到全局客户端，不做额外验证。
+/// 应在 validate_proxy 成功后调用。
+///
+/// # Arguments
+/// * `proxy_url` - 代理 URL，None 或空字符串表示直连
+pub fn apply_proxy(proxy_url: Option<&str>) -> Result<(), String> {
+    let effective_url = proxy_url.filter(|s| !s.trim().is_empty());
+    let new_client = build_client(effective_url)?;
+
+    // 更新客户端
+    if let Some(lock) = GLOBAL_CLIENT.get() {
+        let mut client = lock.write().map_err(|e| {
+            log::error!("[GlobalProxy] [GP-001] Failed to acquire write lock: {e}");
+            "Failed to update proxy: lock poisoned".to_string()
+        })?;
+        *client = new_client;
+    } else {
+        // 如果还没初始化，则初始化
+        return init(proxy_url);
+    }
+
+    // 更新代理 URL 记录
+    if let Some(lock) = CURRENT_PROXY_URL.get() {
+        let mut url = lock.write().map_err(|e| {
+            log::error!("[GlobalProxy] [GP-002] Failed to acquire URL write lock: {e}");
+            "Failed to update proxy URL record: lock poisoned".to_string()
+        })?;
+        *url = effective_url.map(|s| s.to_string());
+    }
+
+    log::info!(
+        "[GlobalProxy] Applied: {}",
+        effective_url
+            .map(mask_url)
+            .unwrap_or_else(|| "direct connection".to_string())
+    );
+
+    Ok(())
+}
+
+/// 更新代理配置（热更新）
+///
+/// 可在运行时调用以更改代理设置，无需重启应用。
+/// 注意：此函数同时验证和应用，如果需要先验证后持久化再应用，
+/// 请使用 validate_proxy + apply_proxy 组合。
+///
+/// # Arguments
+/// * `proxy_url` - 新的代理 URL，None 或空字符串表示直连
+#[allow(dead_code)]
+pub fn update_proxy(proxy_url: Option<&str>) -> Result<(), String> {
+    let effective_url = proxy_url.filter(|s| !s.trim().is_empty());
+    let new_client = build_client(effective_url)?;
+
+    // 更新客户端
+    if let Some(lock) = GLOBAL_CLIENT.get() {
+        let mut client = lock.write().map_err(|e| {
+            log::error!("[GlobalProxy] [GP-001] Failed to acquire write lock: {e}");
+            "Failed to update proxy: lock poisoned".to_string()
+        })?;
+        *client = new_client;
+    } else {
+        // 如果还没初始化，则初始化
+        return init(proxy_url);
+    }
+
+    // 更新代理 URL 记录
+    if let Some(lock) = CURRENT_PROXY_URL.get() {
+        let mut url = lock.write().map_err(|e| {
+            log::error!("[GlobalProxy] [GP-002] Failed to acquire URL write lock: {e}");
+            "Failed to update proxy URL record: lock poisoned".to_string()
+        })?;
+        *url = effective_url.map(|s| s.to_string());
+    }
+
+    log::info!(
+        "[GlobalProxy] Updated: {}",
+        effective_url
+            .map(mask_url)
+            .unwrap_or_else(|| "direct connection".to_string())
+    );
+
+    Ok(())
+}
+
+/// 获取全局 HTTP 客户端
+///
+/// 返回配置了代理的客户端（如果已配置代理），否则返回直连客户端。
+pub fn get() -> Client {
+    GLOBAL_CLIENT
+        .get()
+        .and_then(|lock| lock.read().ok())
+        .map(|c| c.clone())
+        .unwrap_or_else(|| {
+            // 如果还没初始化，创建一个默认客户端（配置与 build_client 一致）
+            log::warn!("[GlobalProxy] [GP-004] Client not initialized, using fallback");
+            Client::builder()
+                .timeout(Duration::from_secs(600))
+                .connect_timeout(Duration::from_secs(30))
+                .pool_max_idle_per_host(10)
+                .tcp_keepalive(Duration::from_secs(60))
+                .no_proxy()
+                .build()
+                .unwrap_or_default()
+        })
+}
+
+/// 获取当前代理 URL
+///
+/// 返回当前配置的代理 URL，None 表示直连。
+pub fn get_current_proxy_url() -> Option<String> {
+    CURRENT_PROXY_URL
+        .get()
+        .and_then(|lock| lock.read().ok())
+        .and_then(|url| url.clone())
+}
+
+/// 检查是否正在使用代理
+#[allow(dead_code)]
+pub fn is_proxy_enabled() -> bool {
+    get_current_proxy_url().is_some()
+}
+
+/// 构建 HTTP 客户端
+fn build_client(proxy_url: Option<&str>) -> Result<Client, String> {
+    let mut builder = Client::builder()
+        .timeout(Duration::from_secs(600))
+        .connect_timeout(Duration::from_secs(30))
+        .pool_max_idle_per_host(10)
+        .tcp_keepalive(Duration::from_secs(60));
+
+    // 有代理地址则使用代理，否则直连
+    if let Some(url) = proxy_url {
+        // 先验证 URL 格式和 scheme
+        let parsed = url::Url::parse(url)
+            .map_err(|e| format!("Invalid proxy URL '{}': {}", mask_url(url), e))?;
+
+        let scheme = parsed.scheme();
+        if !["http", "https", "socks5", "socks5h"].contains(&scheme) {
+            return Err(format!(
+                "Invalid proxy scheme '{}' in URL '{}'. Supported: http, https, socks5, socks5h",
+                scheme,
+                mask_url(url)
+            ));
+        }
+
+        let proxy = reqwest::Proxy::all(url)
+            .map_err(|e| format!("Invalid proxy URL '{}': {}", mask_url(url), e))?;
+        builder = builder.proxy(proxy);
+        log::debug!("[GlobalProxy] Proxy configured: {}", mask_url(url));
+    } else {
+        builder = builder.no_proxy();
+        log::debug!("[GlobalProxy] Direct connection (no proxy)");
+    }
+
+    builder
+        .build()
+        .map_err(|e| format!("Failed to build HTTP client: {e}"))
+}
+
+/// 隐藏 URL 中的敏感信息（用于日志）
+pub fn mask_url(url: &str) -> String {
+    if let Ok(parsed) = url::Url::parse(url) {
+        // 隐藏用户名和密码，保留 scheme、host 和端口
+        let host = parsed.host_str().unwrap_or("?");
+        match parsed.port() {
+            Some(port) => format!("{}://{}:{}", parsed.scheme(), host, port),
+            None => format!("{}://{}", parsed.scheme(), host),
+        }
+    } else {
+        // URL 解析失败，返回部分内容
+        if url.len() > 20 {
+            format!("{}...", &url[..20])
+        } else {
+            url.to_string()
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_mask_url() {
+        assert_eq!(mask_url("http://127.0.0.1:7890"), "http://127.0.0.1:7890");
+        assert_eq!(
+            mask_url("http://user:pass@127.0.0.1:7890"),
+            "http://127.0.0.1:7890"
+        );
+        assert_eq!(
+            mask_url("socks5://admin:secret@proxy.example.com:1080"),
+            "socks5://proxy.example.com:1080"
+        );
+        // 无端口的 URL 不应显示 ":?"
+        assert_eq!(
+            mask_url("http://proxy.example.com"),
+            "http://proxy.example.com"
+        );
+        assert_eq!(
+            mask_url("https://user:pass@proxy.example.com"),
+            "https://proxy.example.com"
+        );
+    }
+
+    #[test]
+    fn test_build_client_direct() {
+        let result = build_client(None);
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_build_client_with_http_proxy() {
+        let result = build_client(Some("http://127.0.0.1:7890"));
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_build_client_with_socks5_proxy() {
+        let result = build_client(Some("socks5://127.0.0.1:1080"));
+        assert!(result.is_ok());
+    }
+
+    #[test]
+    fn test_build_client_invalid_url() {
+        // reqwest::Proxy::all 对某些无效 URL 不会立即报错
+        // 使用明确无效的 scheme 来触发错误
+        let result = build_client(Some("invalid-scheme://127.0.0.1:7890"));
+        assert!(result.is_err(), "Should reject invalid proxy scheme");
+    }
+}

src-tauri/src/proxy/mod.rs

@@ -12,6 +12,7 @@ pub mod handler_config;
 pub mod handler_context;
 mod handlers;
 mod health;
+pub mod http_client;
 pub mod log_codes;
 pub mod model_mapper;
 pub mod provider_router;

src-tauri/src/services/skill.rs

@@ -7,7 +7,6 @@
 
 use anyhow::{anyhow, Context, Result};
 use chrono::{DateTime, Utc};
-use reqwest::Client;
 use serde::{Deserialize, Serialize};
 use std::collections::{HashMap, HashSet};
 use std::fs;
@@ -143,9 +142,7 @@ pub struct SkillMetadata {
 
 // ========== SkillService ==========
 
-pub struct SkillService {
-    http_client: Client,
-}
+pub struct SkillService;
 
 impl Default for SkillService {
     fn default() -> Self {
@@ -155,13 +152,7 @@ impl Default for SkillService {
 
 impl SkillService {
     pub fn new() -> Self {
-        Self {
-            http_client: Client::builder()
-                .user_agent("cc-switch")
-                .timeout(std::time::Duration::from_secs(10))
-                .build()
-                .unwrap_or_else(|_| Client::new()),
-        }
+        Self
     }
 
     // ========== 路径管理 ==========
@@ -863,7 +854,8 @@ impl SkillService {
 
     /// 下载并解压 ZIP
     async fn download_and_extract(&self, url: &str, dest: &Path) -> Result<()> {
-        let response = self.http_client.get(url).send().await?;
+        let client = crate::proxy::http_client::get();
+        let response = client.get(url).send().await?;
         if !response.status().is_success() {
             let status = response.status().as_u16().to_string();
             return Err(anyhow::anyhow!(format_skill_error(

src-tauri/src/services/speedtest.rs

@@ -1,7 +1,7 @@
 use futures::future::join_all;
 use reqwest::{Client, Url};
 use serde::Serialize;
-use std::time::{Duration, Instant};
+use std::time::Instant;
 
 use crate::error::AppError;
 
@@ -65,17 +65,21 @@ impl SpeedtestService {
         }
 
         let timeout = Self::sanitize_timeout(timeout_secs);
-        let client = Self::build_client(timeout)?;
+        let (client, request_timeout) = Self::build_client(timeout)?;
 
         let tasks = valid_targets.into_iter().map(|(idx, trimmed, parsed_url)| {
             let client = client.clone();
             async move {
                 // 先进行一次热身请求，忽略结果，仅用于复用连接/绕过首包惩罚。
-                let _ = client.get(parsed_url.clone()).send().await;
+                let _ = client
+                    .get(parsed_url.clone())
+                    .timeout(request_timeout)
+                    .send()
+                    .await;
 
                 // 第二次请求开始计时，并将其作为结果返回。
                 let start = Instant::now();
-                let latency = match client.get(parsed_url).send().await {
+                let latency = match client.get(parsed_url).timeout(request_timeout).send().await {
                     Ok(resp) => EndpointLatency {
                         url: trimmed,
                         latency: Some(start.elapsed().as_millis()),
@@ -112,19 +116,11 @@ impl SpeedtestService {
         Ok(results.into_iter().flatten().collect::<Vec<_>>())
     }
 
-    fn build_client(timeout_secs: u64) -> Result<Client, AppError> {
-        Client::builder()
-            .timeout(Duration::from_secs(timeout_secs))
-            .redirect(reqwest::redirect::Policy::limited(5))
-            .user_agent("cc-switch-speedtest/1.0")
-            .build()
-            .map_err(|e| {
-                AppError::localized(
-                    "speedtest.client_create_failed",
-                    format!("创建 HTTP 客户端失败: {e}"),
-                    format!("Failed to create HTTP client: {e}"),
-                )
-            })
+    fn build_client(timeout_secs: u64) -> Result<(Client, std::time::Duration), AppError> {
+        // 使用全局 HTTP 客户端（已包含代理配置）
+        // 返回 timeout Duration 供请求级别使用
+        let timeout = std::time::Duration::from_secs(timeout_secs);
+        Ok((crate::proxy::http_client::get(), timeout))
     }
 
     fn sanitize_timeout(timeout_secs: Option<u64>) -> u64 {

src-tauri/src/services/stream_check.rs

@@ -7,7 +7,7 @@ use regex::Regex;
 use reqwest::Client;
 use serde::{Deserialize, Serialize};
 use serde_json::json;
-use std::time::{Duration, Instant};
+use std::time::Instant;
 
 use crate::app_config::AppType;
 use crate::error::AppError;
@@ -136,23 +136,36 @@ impl StreamCheckService {
             .extract_auth(provider)
             .ok_or_else(|| AppError::Message("未找到 API Key".to_string()))?;
 
-        let client = Client::builder()
-            .timeout(Duration::from_secs(config.timeout_secs))
-            .user_agent("cc-switch/1.0")
-            .build()
-            .map_err(|e| AppError::Message(format!("创建客户端失败: {e}")))?;
+        // 使用全局 HTTP 客户端（已包含代理配置）
+        let client = crate::proxy::http_client::get();
+        let request_timeout = std::time::Duration::from_secs(config.timeout_secs);
 
         let model_to_test = Self::resolve_test_model(app_type, provider, config);
 
         let result = match app_type {
             AppType::Claude => {
-                Self::check_claude_stream(&client, &base_url, &auth, &model_to_test).await
+                Self::check_claude_stream(
+                    &client,
+                    &base_url,
+                    &auth,
+                    &model_to_test,
+                    request_timeout,
+                )
+                .await
             }
             AppType::Codex => {
-                Self::check_codex_stream(&client, &base_url, &auth, &model_to_test).await
+                Self::check_codex_stream(&client, &base_url, &auth, &model_to_test, request_timeout)
+                    .await
             }
             AppType::Gemini => {
-                Self::check_gemini_stream(&client, &base_url, &auth, &model_to_test).await
+                Self::check_gemini_stream(
+                    &client,
+                    &base_url,
+                    &auth,
+                    &model_to_test,
+                    request_timeout,
+                )
+                .await
             }
         };
 
@@ -193,6 +206,7 @@ impl StreamCheckService {
         base_url: &str,
         auth: &AuthInfo,
         model: &str,
+        timeout: std::time::Duration,
     ) -> Result<(u16, String), AppError> {
         let base = base_url.trim_end_matches('/');
         let url = if base.ends_with("/v1") {
@@ -213,6 +227,7 @@ impl StreamCheckService {
             .header("x-api-key", &auth.api_key)
             .header("anthropic-version", "2023-06-01")
             .header("Content-Type", "application/json")
+            .timeout(timeout)
             .json(&body)
             .send()
             .await
@@ -243,6 +258,7 @@ impl StreamCheckService {
         base_url: &str,
         auth: &AuthInfo,
         model: &str,
+        timeout: std::time::Duration,
     ) -> Result<(u16, String), AppError> {
         let base = base_url.trim_end_matches('/');
         let url = if base.ends_with("/v1") {
@@ -275,6 +291,7 @@ impl StreamCheckService {
             .post(&url)
             .header("Authorization", format!("Bearer {}", auth.api_key))
             .header("Content-Type", "application/json")
+            .timeout(timeout)
             .json(&body)
             .send()
             .await
@@ -304,6 +321,7 @@ impl StreamCheckService {
         base_url: &str,
         auth: &AuthInfo,
         model: &str,
+        timeout: std::time::Duration,
     ) -> Result<(u16, String), AppError> {
         let base = base_url.trim_end_matches('/');
         let url = format!("{base}/v1/chat/completions");
@@ -320,6 +338,7 @@ impl StreamCheckService {
             .post(&url)
             .header("Authorization", format!("Bearer {}", auth.api_key))
             .header("Content-Type", "application/json")
+            .timeout(timeout)
             .json(&body)
             .send()
             .await

src-tauri/src/usage_script.rs

@@ -1,8 +1,6 @@
-use reqwest::Client;
 use rquickjs::{Context, Function, Runtime};
 use serde_json::Value;
 use std::collections::HashMap;
-use std::time::Duration;
 use url::{Host, Url};
 
 use crate::error::AppError;
@@ -215,18 +213,10 @@ struct RequestConfig {
 
 /// 发送 HTTP 请求
 async fn send_http_request(config: &RequestConfig, timeout_secs: u64) -> Result<String, AppError> {
-    // 约束超时范围，防止异常配置导致长时间阻塞
-    let timeout = timeout_secs.clamp(2, 30);
-    let client = Client::builder()
-        .timeout(Duration::from_secs(timeout))
-        .build()
-        .map_err(|e| {
-            AppError::localized(
-                "usage_script.client_create_failed",
-                format!("创建客户端失败: {e}"),
-                format!("Failed to create client: {e}"),
-            )
-        })?;
+    // 使用全局 HTTP 客户端（已包含代理配置）
+    let client = crate::proxy::http_client::get();
+    // 约束超时范围，防止异常配置导致长时间阻塞（最小 2 秒，最大 30 秒）
+    let request_timeout = std::time::Duration::from_secs(timeout_secs.clamp(2, 30));
 
     // 严格校验 HTTP 方法，非法值不回退为 GET
     let method: reqwest::Method = config.method.parse().map_err(|_| {
@@ -237,7 +227,9 @@ async fn send_http_request(config: &RequestConfig, timeout_secs: u64) -> Result<
         )
     })?;
 
-    let mut req = client.request(method.clone(), &config.url);
+    let mut req = client
+        .request(method.clone(), &config.url)
+        .timeout(request_timeout);
 
     // 添加请求头
     for (k, v) in &config.headers {

src/App.tsx

@@ -502,7 +502,9 @@ function App() {
                       onDuplicate={handleDuplicateProvider}
                       onConfigureUsage={setUsageProvider}
                       onOpenWebsite={handleOpenWebsite}
-                      onOpenTerminal={activeApp === "claude" ? handleOpenTerminal : undefined}
+                      onOpenTerminal={
+                        activeApp === "claude" ? handleOpenTerminal : undefined
+                      }
                       onCreate={() => setIsAddOpen(true)}
                     />
                   </motion.div>

src/components/providers/ProviderCard.tsx

@@ -341,7 +341,9 @@ export function ProviderCard({
               onTest={onTest ? () => onTest(provider) : undefined}
               onConfigureUsage={() => onConfigureUsage(provider)}
               onDelete={() => onDelete(provider)}
-              onOpenTerminal={onOpenTerminal ? () => onOpenTerminal(provider) : undefined}
+              onOpenTerminal={
+                onOpenTerminal ? () => onOpenTerminal(provider) : undefined
+              }
               // 故障转移相关
               isAutoFailoverEnabled={isAutoFailoverEnabled}
               isInFailoverQueue={isInFailoverQueue}

src/components/proxy/ProxyPanel.tsx

@@ -106,13 +106,11 @@ export function ProxyPanel() {
     // 校验地址格式（简单的 IP 地址或 localhost 校验）
     const addressTrimmed = listenAddress.trim();
     const ipv4Regex = /^(\d{1,3}\.){3}\d{1,3}$/;
-    // 规范化 localhost 为 127.0.0.1
-    const normalizedAddress =
-      addressTrimmed === "localhost" ? "127.0.0.1" : addressTrimmed;
     const isValidAddress =
-      normalizedAddress === "0.0.0.0" ||
-      (ipv4Regex.test(normalizedAddress) &&
-        normalizedAddress.split(".").every((n) => {
+      addressTrimmed === "localhost" ||
+      addressTrimmed === "0.0.0.0" ||
+      (ipv4Regex.test(addressTrimmed) &&
+        addressTrimmed.split(".").every((n) => {
           const num = parseInt(n);
           return num >= 0 && num <= 255;
         }));
@@ -148,11 +146,9 @@ export function ProxyPanel() {
     try {
       await updateGlobalConfig.mutateAsync({
         ...globalConfig,
-        listenAddress: normalizedAddress,
+        listenAddress: addressTrimmed,
         listenPort: port,
       });
-      // 同步更新本地状态为规范化后的值
-      setListenAddress(normalizedAddress);
       toast.success(
         t("proxy.settings.configSaved", { defaultValue: "代理配置已保存" }),
         { closeButton: true },

src/components/settings/GlobalProxySettings.tsx

@@ -0,0 +1,275 @@
+/**
+ * 全局出站代理设置组件
+ *
+ * 提供配置全局代理的输入界面，支持用户名密码认证。
+ */
+
+import { useState, useEffect, useMemo } from "react";
+import { useTranslation } from "react-i18next";
+import { Input } from "@/components/ui/input";
+import { Button } from "@/components/ui/button";
+import { Loader2, TestTube2, Search, Eye, EyeOff, X } from "lucide-react";
+import {
+  useGlobalProxyUrl,
+  useSetGlobalProxyUrl,
+  useTestProxy,
+  useScanProxies,
+  type DetectedProxy,
+} from "@/hooks/useGlobalProxy";
+
+/** 从完整 URL 提取认证信息 */
+function extractAuth(url: string): {
+  baseUrl: string;
+  username: string;
+  password: string;
+} {
+  if (!url.trim()) return { baseUrl: "", username: "", password: "" };
+
+  try {
+    const parsed = new URL(url);
+    const username = decodeURIComponent(parsed.username || "");
+    const password = decodeURIComponent(parsed.password || "");
+    // 移除认证信息，获取基础 URL
+    parsed.username = "";
+    parsed.password = "";
+    return { baseUrl: parsed.toString(), username, password };
+  } catch {
+    return { baseUrl: url, username: "", password: "" };
+  }
+}
+
+/** 将认证信息合并到 URL */
+function mergeAuth(
+  baseUrl: string,
+  username: string,
+  password: string,
+): string {
+  if (!baseUrl.trim()) return "";
+  if (!username.trim()) return baseUrl;
+
+  try {
+    const parsed = new URL(baseUrl);
+    // URL 对象的 username/password setter 会自动进行 percent-encoding
+    // 不要使用 encodeURIComponent，否则会导致双重编码
+    parsed.username = username.trim();
+    if (password) {
+      parsed.password = password;
+    }
+    return parsed.toString();
+  } catch {
+    // URL 解析失败，尝试手动插入（此时需要手动编码）
+    const match = baseUrl.match(/^(\w+:\/\/)(.+)$/);
+    if (match) {
+      const auth = password
+        ? `${encodeURIComponent(username.trim())}:${encodeURIComponent(password)}@`
+        : `${encodeURIComponent(username.trim())}@`;
+      return `${match[1]}${auth}${match[2]}`;
+    }
+    return baseUrl;
+  }
+}
+
+export function GlobalProxySettings() {
+  const { t } = useTranslation();
+  const { data: savedUrl, isLoading } = useGlobalProxyUrl();
+  const setMutation = useSetGlobalProxyUrl();
+  const testMutation = useTestProxy();
+  const scanMutation = useScanProxies();
+
+  const [url, setUrl] = useState("");
+  const [username, setUsername] = useState("");
+  const [password, setPassword] = useState("");
+  const [showPassword, setShowPassword] = useState(false);
+  const [dirty, setDirty] = useState(false);
+  const [detected, setDetected] = useState<DetectedProxy[]>([]);
+
+  // 计算完整 URL（含认证信息）
+  const fullUrl = useMemo(
+    () => mergeAuth(url, username, password),
+    [url, username, password],
+  );
+
+  // 同步远程配置
+  useEffect(() => {
+    if (savedUrl !== undefined) {
+      const { baseUrl, username: u, password: p } = extractAuth(savedUrl || "");
+      setUrl(baseUrl);
+      setUsername(u);
+      setPassword(p);
+      setDirty(false);
+    }
+  }, [savedUrl]);
+
+  const handleSave = async () => {
+    await setMutation.mutateAsync(fullUrl);
+    setDirty(false);
+  };
+
+  const handleTest = async () => {
+    if (fullUrl) {
+      await testMutation.mutateAsync(fullUrl);
+    }
+  };
+
+  const handleScan = async () => {
+    const result = await scanMutation.mutateAsync();
+    setDetected(result);
+  };
+
+  const handleSelect = (proxyUrl: string) => {
+    const { baseUrl, username: u, password: p } = extractAuth(proxyUrl);
+    setUrl(baseUrl);
+    setUsername(u);
+    setPassword(p);
+    setDirty(true);
+    setDetected([]);
+  };
+
+  const handleClear = () => {
+    setUrl("");
+    setUsername("");
+    setPassword("");
+    setDirty(true);
+  };
+
+  const handleKeyDown = (e: React.KeyboardEvent) => {
+    if (e.key === "Enter" && dirty && !setMutation.isPending) {
+      handleSave();
+    }
+  };
+
+  // 只在首次加载且无数据时显示加载状态
+  if (isLoading && savedUrl === undefined) {
+    return (
+      <div className="flex items-center justify-center p-4">
+        <Loader2 className="h-5 w-5 animate-spin text-muted-foreground" />
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-3">
+      {/* 描述 */}
+      <p className="text-sm text-muted-foreground">
+        {t("settings.globalProxy.hint")}
+      </p>
+
+      {/* 代理地址输入框和按钮 */}
+      <div className="flex gap-2">
+        <Input
+          placeholder="http://127.0.0.1:7890 / socks5://127.0.0.1:1080"
+          value={url}
+          onChange={(e) => {
+            setUrl(e.target.value);
+            setDirty(true);
+          }}
+          onKeyDown={handleKeyDown}
+          className="font-mono text-sm flex-1"
+        />
+        <Button
+          variant="outline"
+          size="icon"
+          disabled={scanMutation.isPending}
+          onClick={handleScan}
+          title={t("settings.globalProxy.scan")}
+        >
+          {scanMutation.isPending ? (
+            <Loader2 className="h-4 w-4 animate-spin" />
+          ) : (
+            <Search className="h-4 w-4" />
+          )}
+        </Button>
+        <Button
+          variant="outline"
+          size="icon"
+          disabled={!fullUrl || testMutation.isPending}
+          onClick={handleTest}
+          title={t("settings.globalProxy.test")}
+        >
+          {testMutation.isPending ? (
+            <Loader2 className="h-4 w-4 animate-spin" />
+          ) : (
+            <TestTube2 className="h-4 w-4" />
+          )}
+        </Button>
+        <Button
+          variant="outline"
+          size="icon"
+          disabled={!url && !username && !password}
+          onClick={handleClear}
+          title={t("settings.globalProxy.clear")}
+        >
+          <X className="h-4 w-4" />
+        </Button>
+        <Button
+          onClick={handleSave}
+          disabled={!dirty || setMutation.isPending}
+          size="sm"
+        >
+          {setMutation.isPending && (
+            <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+          )}
+          {t("common.save")}
+        </Button>
+      </div>
+
+      {/* 认证信息：用户名 + 密码（可选） */}
+      <div className="flex gap-2">
+        <Input
+          placeholder={t("settings.globalProxy.username")}
+          value={username}
+          onChange={(e) => {
+            setUsername(e.target.value);
+            setDirty(true);
+          }}
+          onKeyDown={handleKeyDown}
+          className="font-mono text-sm flex-1"
+        />
+        <div className="relative flex-1">
+          <Input
+            type={showPassword ? "text" : "password"}
+            placeholder={t("settings.globalProxy.password")}
+            value={password}
+            onChange={(e) => {
+              setPassword(e.target.value);
+              setDirty(true);
+            }}
+            onKeyDown={handleKeyDown}
+            className="font-mono text-sm pr-10"
+          />
+          <Button
+            type="button"
+            variant="ghost"
+            size="icon"
+            className="absolute right-0 top-0 h-full px-3 hover:bg-transparent"
+            onClick={() => setShowPassword(!showPassword)}
+            tabIndex={-1}
+          >
+            {showPassword ? (
+              <EyeOff className="h-4 w-4 text-muted-foreground" />
+            ) : (
+              <Eye className="h-4 w-4 text-muted-foreground" />
+            )}
+          </Button>
+        </div>
+      </div>
+
+      {/* 扫描结果 */}
+      {detected.length > 0 && (
+        <div className="flex flex-wrap gap-2">
+          {detected.map((p) => (
+            <Button
+              key={p.url}
+              variant="secondary"
+              size="sm"
+              onClick={() => handleSelect(p.url)}
+              className="font-mono text-xs"
+            >
+              {p.url}
+            </Button>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}

src/components/settings/SettingsPage.tsx

@@ -9,6 +9,7 @@ import {
   Database,
   Server,
   ChevronDown,
+  Globe,
 } from "lucide-react";
 import * as AccordionPrimitive from "@radix-ui/react-accordion";
 import { toast } from "sonner";
@@ -34,6 +35,7 @@ import { WindowSettings } from "@/components/settings/WindowSettings";
 import { DirectorySettings } from "@/components/settings/DirectorySettings";
 import { ImportExportSection } from "@/components/settings/ImportExportSection";
 import { AboutSection } from "@/components/settings/AboutSection";
+import { GlobalProxySettings } from "@/components/settings/GlobalProxySettings";
 import { ProxyPanel } from "@/components/proxy";
 import { PricingConfigPanel } from "@/components/usage/PricingConfigPanel";
 import { ModelTestConfigPanel } from "@/components/usage/ModelTestConfigPanel";
@@ -495,6 +497,28 @@ export function SettingsPage({
                       </AccordionContent>
                     </AccordionItem>
 
+                    <AccordionItem
+                      value="globalProxy"
+                      className="rounded-xl glass-card overflow-hidden"
+                    >
+                      <AccordionTrigger className="px-6 py-4 hover:no-underline hover:bg-muted/50 data-[state=open]:bg-muted/50">
+                        <div className="flex items-center gap-3">
+                          <Globe className="h-5 w-5 text-cyan-500" />
+                          <div className="text-left">
+                            <h3 className="text-base font-semibold">
+                              {t("settings.advanced.globalProxy.title")}
+                            </h3>
+                            <p className="text-sm text-muted-foreground font-normal">
+                              {t("settings.advanced.globalProxy.description")}
+                            </p>
+                          </div>
+                        </div>
+                      </AccordionTrigger>
+                      <AccordionContent className="px-6 pb-6 pt-4 border-t border-border/50">
+                        <GlobalProxySettings />
+                      </AccordionContent>
+                    </AccordionItem>
+
                     <AccordionItem
                       value="data"
                       className="rounded-xl glass-card overflow-hidden"

src/hooks/useGlobalProxy.ts

@@ -0,0 +1,109 @@
+/**
+ * 全局出站代理 React Hooks
+ *
+ * 提供获取、设置和测试全局代理的 React Query hooks。
+ */
+
+import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
+import { toast } from "sonner";
+import { useTranslation } from "react-i18next";
+import {
+  getGlobalProxyUrl,
+  setGlobalProxyUrl,
+  testProxyUrl,
+  getUpstreamProxyStatus,
+  scanLocalProxies,
+  type ProxyTestResult,
+  type UpstreamProxyStatus,
+  type DetectedProxy,
+} from "@/lib/api/globalProxy";
+
+/**
+ * 获取全局代理 URL
+ */
+export function useGlobalProxyUrl() {
+  return useQuery({
+    queryKey: ["globalProxyUrl"],
+    queryFn: getGlobalProxyUrl,
+    staleTime: 30 * 1000, // 30秒内不重新获取，避免展开时闪烁
+  });
+}
+
+/**
+ * 设置全局代理 URL
+ */
+export function useSetGlobalProxyUrl() {
+  const queryClient = useQueryClient();
+  const { t } = useTranslation();
+
+  return useMutation({
+    mutationFn: setGlobalProxyUrl,
+    onSuccess: () => {
+      toast.success(t("settings.globalProxy.saved"));
+      queryClient.invalidateQueries({ queryKey: ["globalProxyUrl"] });
+      queryClient.invalidateQueries({ queryKey: ["upstreamProxyStatus"] });
+    },
+    onError: (error: unknown) => {
+      const message =
+        error instanceof Error
+          ? error.message
+          : typeof error === "string"
+            ? error
+            : "Unknown error";
+      toast.error(t("settings.globalProxy.saveFailed", { error: message }));
+    },
+  });
+}
+
+/**
+ * 测试代理连接
+ */
+export function useTestProxy() {
+  const { t } = useTranslation();
+
+  return useMutation({
+    mutationFn: testProxyUrl,
+    onSuccess: (result: ProxyTestResult) => {
+      if (result.success) {
+        toast.success(
+          t("settings.globalProxy.testSuccess", { latency: result.latencyMs }),
+        );
+      } else {
+        toast.error(
+          t("settings.globalProxy.testFailed", { error: result.error }),
+        );
+      }
+    },
+    onError: (error: Error) => {
+      toast.error(error.message);
+    },
+  });
+}
+
+/**
+ * 获取当前出站代理状态
+ */
+export function useUpstreamProxyStatus() {
+  return useQuery<UpstreamProxyStatus>({
+    queryKey: ["upstreamProxyStatus"],
+    queryFn: getUpstreamProxyStatus,
+  });
+}
+
+/**
+ * 扫描本地代理
+ */
+export function useScanProxies() {
+  const { t } = useTranslation();
+
+  return useMutation({
+    mutationFn: scanLocalProxies,
+    onError: (error: Error) => {
+      toast.error(
+        t("settings.globalProxy.scanFailed", { error: error.message }),
+      );
+    },
+  });
+}
+
+export type { DetectedProxy };

src/i18n/locales/en.json

@@ -183,6 +183,10 @@
         "title": "Cost Pricing",
         "description": "Manage token pricing rules for each model"
       },
+      "globalProxy": {
+        "title": "Global Outbound Proxy",
+        "description": "Configure proxy for CC Switch to access external APIs"
+      },
       "data": {
         "title": "Data Management",
         "description": "Import/export configurations and backup/restore"
@@ -271,7 +275,21 @@
     "restartLater": "Restart Later",
     "restartFailed": "Application restart failed, please manually close and reopen.",
     "devModeRestartHint": "Dev Mode: Automatic restart not supported, please manually restart the application.",
-    "saving": "Saving..."
+    "saving": "Saving...",
+    "globalProxy": {
+      "label": "Global Proxy",
+      "hint": "Proxy all requests (API, Skills download, etc.). Leave empty for direct connection.",
+      "username": "Username (optional)",
+      "password": "Password (optional)",
+      "test": "Test Connection",
+      "scan": "Scan Local Proxies",
+      "clear": "Clear",
+      "scanFailed": "Scan failed: {{error}}",
+      "saved": "Proxy settings saved",
+      "saveFailed": "Save failed: {{error}}",
+      "testSuccess": "Connected! Latency {{latency}}ms",
+      "testFailed": "Connection failed: {{error}}"
+    }
   },
   "apps": {
     "claude": "Claude Code",

src/i18n/locales/ja.json

@@ -183,6 +183,10 @@
         "title": "コスト計算",
         "description": "各モデルのトークン料金ルールを管理"
       },
+      "globalProxy": {
+        "title": "グローバル送信プロキシ",
+        "description": "CC Switch が外部 API にアクセスする際のプロキシを設定"
+      },
       "data": {
         "title": "データ管理",
         "description": "設定のインポート/エクスポートとバックアップ/復元"
@@ -271,7 +275,21 @@
     "restartLater": "後で再起動",
     "restartFailed": "アプリの再起動に失敗しました。手動で閉じて再度開いてください。",
     "devModeRestartHint": "開発モードでは自動再起動をサポートしていません。手動で再起動してください。",
-    "saving": "保存中..."
+    "saving": "保存中...",
+    "globalProxy": {
+      "label": "グローバルプロキシ",
+      "hint": "すべてのリクエスト（API、Skills ダウンロードなど）をプロキシ経由で送信します。空欄で直接接続。",
+      "username": "ユーザー名（任意）",
+      "password": "パスワード（任意）",
+      "test": "接続テスト",
+      "scan": "ローカルプロキシをスキャン",
+      "clear": "クリア",
+      "scanFailed": "スキャンに失敗しました: {{error}}",
+      "saved": "プロキシ設定を保存しました",
+      "saveFailed": "保存に失敗しました: {{error}}",
+      "testSuccess": "接続成功！遅延 {{latency}}ms",
+      "testFailed": "接続に失敗しました: {{error}}"
+    }
   },
   "apps": {
     "claude": "Claude Code",

src/i18n/locales/zh.json

@@ -183,6 +183,10 @@
         "title": "成本定价",
         "description": "管理各模型 Token 计费规则"
       },
+      "globalProxy": {
+        "title": "全局出站代理",
+        "description": "配置 CC Switch 访问外部 API 时使用的代理"
+      },
       "data": {
         "title": "数据管理",
         "description": "导入导出配置与备份恢复"
@@ -271,7 +275,21 @@
     "restartLater": "稍后重启",
     "restartFailed": "应用重启失败，请手动关闭后重新打开。",
     "devModeRestartHint": "开发模式下不支持自动重启，请手动重新启动应用。",
-    "saving": "正在保存..."
+    "saving": "正在保存...",
+    "globalProxy": {
+      "label": "全局代理",
+      "hint": "代理所有请求（API、Skills 下载等）。留空表示直连。",
+      "username": "用户名（可选）",
+      "password": "密码（可选）",
+      "test": "测试连接",
+      "scan": "扫描本地代理",
+      "clear": "清除",
+      "scanFailed": "扫描失败：{{error}}",
+      "saved": "代理设置已保存",
+      "saveFailed": "保存失败：{{error}}",
+      "testSuccess": "连接成功！延迟 {{latency}}ms",
+      "testFailed": "连接失败：{{error}}"
+    }
   },
   "apps": {
     "claude": "Claude Code",

src/lib/api/globalProxy.ts

@@ -0,0 +1,85 @@
+/**
+ * 全局出站代理 API
+ *
+ * 提供获取、设置和测试全局代理的功能。
+ */
+
+import { invoke } from "@tauri-apps/api/core";
+
+/**
+ * 代理测试结果
+ */
+export interface ProxyTestResult {
+  success: boolean;
+  latencyMs: number;
+  error: string | null;
+}
+
+/**
+ * 出站代理状态
+ */
+export interface UpstreamProxyStatus {
+  enabled: boolean;
+  proxyUrl: string | null;
+}
+
+/**
+ * 检测到的代理
+ */
+export interface DetectedProxy {
+  url: string;
+  proxyType: string;
+  port: number;
+}
+
+/**
+ * 获取全局代理 URL
+ *
+ * @returns 代理 URL，null 表示未配置（直连）
+ */
+export async function getGlobalProxyUrl(): Promise<string | null> {
+  return invoke<string | null>("get_global_proxy_url");
+}
+
+/**
+ * 设置全局代理 URL
+ *
+ * @param url - 代理 URL（如 http://127.0.0.1:7890 或 socks5://127.0.0.1:1080）
+ *              空字符串表示清除代理（直连）
+ */
+export async function setGlobalProxyUrl(url: string): Promise<void> {
+  try {
+    return await invoke("set_global_proxy_url", { url });
+  } catch (error) {
+    // Tauri invoke 错误可能是字符串
+    throw new Error(typeof error === "string" ? error : String(error));
+  }
+}
+
+/**
+ * 测试代理连接
+ *
+ * @param url - 要测试的代理 URL
+ * @returns 测试结果，包含是否成功、延迟和错误信息
+ */
+export async function testProxyUrl(url: string): Promise<ProxyTestResult> {
+  return invoke<ProxyTestResult>("test_proxy_url", { url });
+}
+
+/**
+ * 获取当前出站代理状态
+ *
+ * @returns 代理状态，包含是否启用和代理 URL
+ */
+export async function getUpstreamProxyStatus(): Promise<UpstreamProxyStatus> {
+  return invoke<UpstreamProxyStatus>("get_upstream_proxy_status");
+}
+
+/**
+ * 扫描本地代理
+ *
+ * @returns 检测到的代理列表
+ */
+export async function scanLocalProxies(): Promise<DetectedProxy[]> {
+  return invoke<DetectedProxy[]>("scan_local_proxies");
+}