diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index bff29df22..208665965 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -144,6 +144,18 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "async-compression"
+version = "0.4.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d10e4f991a553474232bc0a31799f6d24b034a84c0971d80d2e2f78b2e576e40"
+dependencies = [
+ "compression-codecs",
+ "compression-core",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "async-executor"
 version = "1.13.3"
@@ -805,6 +817,24 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "compression-codecs"
+version = "0.4.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00828ba6fd27b45a448e57dbfe84f1029d4c9f26b368157e9a448a5f49a2ec2a"
+dependencies = [
+ "brotli",
+ "compression-core",
+ "flate2",
+ "memchr",
+]
+
+[[package]]
+name = "compression-core"
+version = "0.4.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75984efb6ed102a0d42db99afb6c1948f0380d1d91808d5529916e6c08b49d8d"
+
 [[package]]
 name = "concurrent-queue"
 version = "2.5.0"
@@ -5993,13 +6023,18 @@ version = "0.6.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4e6559d53cc268e5031cd8429d05415bc4cb4aefc4aa5d6cc35fbf5b924a1f8"
 dependencies = [
+ "async-compression",
  "bitflags 2.10.0",
  "bytes",
+ "futures-core",
  "futures-util",
  "http",
  "http-body",
+ "http-body-util",
  "iri-string",
  "pin-project-lite",
+ "tokio",
+ "tokio-util",
  "tower 0.5.2",
  "tower-layer",
  "tower-service",
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index ea9035ffe..9ee261706 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -29,7 +29,7 @@ axum-server = { version = "0.7", features = ["tls-rustls"] }
 rustls-pemfile = "2"
 tower = "0.4"
 tower-http = { version = "0.5", features = ["limit", "cors"] }
-reqwest = { version = "0.12", features = ["json", "stream"] }
+reqwest = { version = "0.12", features = ["json", "stream", "gzip", "brotli", "deflate"] }
 uuid = { version = "1", features = ["v4"] }
 chrono = { version = "0.4", features = ["serde"] }
 dirs = "5"
diff --git a/src-tauri/src/app/commands/config.rs b/src-tauri/src/app/commands/config.rs
index 7fd2138b6..ad3b1449e 100644
--- a/src-tauri/src/app/commands/config.rs
+++ b/src-tauri/src/app/commands/config.rs
@@ -182,3 +182,158 @@ pub async fn set_endpoint_provider(
     );
     Ok(provider_display.to_string())
 }
+
+/// 根据 API Key Provider 更新环境变量
+///
+/// 当用户在 API Server 页面选择一个 API Key Provider 时调用
+/// 会更新 ~/.claude/settings.json 和 shell 配置文件中的环境变量
+#[tauri::command]
+pub async fn update_provider_env_vars(
+    logs: tauri::State<'_, LogState>,
+    provider_type: String,
+    api_host: String,
+    api_key: Option<String>,
+) -> Result<(), String> {
+    use crate::services::live_sync::write_env_to_shell_config;
+    use serde_json::{json, Value};
+    use std::fs;
+
+    let home = dirs::home_dir().ok_or("Cannot find home directory")?;
+
+    // 根据 provider_type 确定要更新的环境变量
+    // 参考 Claude Code 文档：https://code.claude.com/docs/en/llm-gateway
+    let env_vars: Vec<(String, String)> = match provider_type.to_lowercase().as_str() {
+        // Anthropic 兼容类型 - 包括大多数第三方 Provider
+        // 如 DeepSeek、智谱、MiniMax、OpenRouter、AiHubMix 等
+        "anthropic" | "new-api" | "gateway" => {
+            let mut vars = vec![("ANTHROPIC_BASE_URL".to_string(), api_host.clone())];
+            if let Some(key) = api_key {
+                vars.push(("ANTHROPIC_AUTH_TOKEN".to_string(), key));
+            }
+            vars
+        }
+        // OpenAI 兼容类型 - 用于 Codex 等
+        "openai" | "openai-response" => {
+            let mut vars = vec![("OPENAI_BASE_URL".to_string(), api_host.clone())];
+            if let Some(key) = api_key {
+                vars.push(("OPENAI_API_KEY".to_string(), key));
+            }
+            vars
+        }
+        // Gemini 类型
+        "gemini" => {
+            let mut vars = vec![("GEMINI_API_BASE_URL".to_string(), api_host.clone())];
+            if let Some(key) = api_key {
+                vars.push(("GEMINI_API_KEY".to_string(), key));
+            }
+            vars
+        }
+        // Azure OpenAI 类型
+        "azure-openai" => {
+            let mut vars = vec![("AZURE_OPENAI_BASE_URL".to_string(), api_host.clone())];
+            if let Some(key) = api_key {
+                vars.push(("AZURE_OPENAI_API_KEY".to_string(), key));
+            }
+            vars
+        }
+        // Google Vertex AI 类型
+        "vertexai" => {
+            let mut vars = vec![("ANTHROPIC_VERTEX_BASE_URL".to_string(), api_host.clone())];
+            if let Some(key) = api_key {
+                vars.push(("GOOGLE_APPLICATION_CREDENTIALS".to_string(), key));
+            }
+            vars
+        }
+        // AWS Bedrock 类型
+        "aws-bedrock" => {
+            let vars = vec![
+                ("ANTHROPIC_BEDROCK_BASE_URL".to_string(), api_host.clone()),
+                ("CLAUDE_CODE_USE_BEDROCK".to_string(), "1".to_string()),
+            ];
+            // Bedrock 通常使用 AWS 凭证，不需要单独的 API Key
+            vars
+        }
+        // Ollama 本地部署
+        "ollama" => {
+            let vars = vec![("OLLAMA_BASE_URL".to_string(), api_host.clone())];
+            vars
+        }
+        _ => {
+            // 未知类型，默认使用 ANTHROPIC_BASE_URL（因为大多数第三方 Provider 都是 Anthropic 兼容的）
+            logs.write().await.add(
+                "info",
+                &format!(
+                    "Provider 类型 '{}' 使用默认 ANTHROPIC_BASE_URL",
+                    provider_type
+                ),
+            );
+            let mut vars = vec![("ANTHROPIC_BASE_URL".to_string(), api_host.clone())];
+            if let Some(key) = api_key {
+                vars.push(("ANTHROPIC_AUTH_TOKEN".to_string(), key));
+            }
+            vars
+        }
+    };
+
+    // 1. 更新 ~/.claude/settings.json
+    let claude_dir = home.join(".claude");
+    let settings_path = claude_dir.join("settings.json");
+
+    // 确保目录存在
+    if !claude_dir.exists() {
+        fs::create_dir_all(&claude_dir).map_err(|e| e.to_string())?;
+    }
+
+    // 读取现有配置
+    let mut settings: Value = if settings_path.exists() {
+        let content = fs::read_to_string(&settings_path).map_err(|e| e.to_string())?;
+        serde_json::from_str(&content).unwrap_or(json!({}))
+    } else {
+        json!({})
+    };
+
+    // 更新 env 字段
+    let settings_obj = settings.as_object_mut().ok_or("Invalid settings format")?;
+    if !settings_obj.contains_key("env") {
+        settings_obj.insert("env".to_string(), json!({}));
+    }
+
+    if let Some(env_obj) = settings_obj.get_mut("env").and_then(|v| v.as_object_mut()) {
+        for (key, value) in &env_vars {
+            env_obj.insert(key.clone(), json!(value));
+        }
+    }
+
+    // 写入配置文件
+    let content = serde_json::to_string_pretty(&settings).map_err(|e| e.to_string())?;
+    fs::write(&settings_path, content).map_err(|e| e.to_string())?;
+
+    // 2. 更新 shell 配置文件
+    if let Err(e) = write_env_to_shell_config(&env_vars) {
+        logs.write()
+            .await
+            .add("warn", &format!("写入 shell 配置文件失败: {}", e));
+        // 不中断流程
+    }
+
+    logs.write().await.add(
+        "info",
+        &format!(
+            "已更新 {} 环境变量: {}",
+            provider_type,
+            env_vars
+                .iter()
+                .map(|(k, _)| k.as_str())
+                .collect::<Vec<_>>()
+                .join(", ")
+        ),
+    );
+
+    tracing::info!(
+        "[CONFIG] Provider 环境变量已更新: type={}, api_host={}",
+        provider_type,
+        api_host
+    );
+
+    Ok(())
+}
diff --git a/src-tauri/src/commands/plugin_cmd.rs b/src-tauri/src/commands/plugin_cmd.rs
index d05ceb89e..f2539bbe3 100644
--- a/src-tauri/src/commands/plugin_cmd.rs
+++ b/src-tauri/src/commands/plugin_cmd.rs
@@ -175,12 +175,40 @@ pub struct PluginUIInfo {
 /// 尝试读取 plugin.json 文件并解析为 PluginManifest
 fn read_plugin_manifest(install_path: &Path) -> Option<PluginManifest> {
     let manifest_path = install_path.join("plugin.json");
+    tracing::debug!(
+        "read_plugin_manifest: install_path={:?}, manifest_path={:?}, exists={}",
+        install_path,
+        manifest_path,
+        manifest_path.exists()
+    );
+
     if !manifest_path.exists() {
+        tracing::debug!("read_plugin_manifest: manifest file does not exist");
         return None;
     }
 
-    let content = std::fs::read_to_string(&manifest_path).ok()?;
-    serde_json::from_str(&content).ok()
+    match std::fs::read_to_string(&manifest_path) {
+        Ok(content) => {
+            tracing::debug!(
+                "read_plugin_manifest: file content length={}",
+                content.len()
+            );
+            match serde_json::from_str(&content) {
+                Ok(manifest) => {
+                    tracing::debug!("read_plugin_manifest: parsed successfully");
+                    Some(manifest)
+                }
+                Err(e) => {
+                    tracing::error!("read_plugin_manifest: JSON parse error: {}", e);
+                    None
+                }
+            }
+        }
+        Err(e) => {
+            tracing::error!("read_plugin_manifest: read file error: {}", e);
+            None
+        }
+    }
 }
 
 /// 获取带有 UI 配置的已安装插件列表
@@ -322,7 +350,17 @@ pub async fn read_plugin_manifest_cmd(
     let plugins_dir = manager.plugins_dir();
     let plugin_path = plugins_dir.join(&plugin_id);
 
-    Ok(read_plugin_manifest(&plugin_path))
+    tracing::debug!(
+        "read_plugin_manifest_cmd: plugin_id={}, plugins_dir={:?}, plugin_path={:?}",
+        plugin_id,
+        plugins_dir,
+        plugin_path
+    );
+
+    let result = read_plugin_manifest(&plugin_path);
+    tracing::debug!("read_plugin_manifest_cmd: result={:?}", result.is_some());
+
+    Ok(result)
 }
 
 /// 启动插件 UI（用于 binary 类型插件）
diff --git a/src-tauri/src/providers/claude_custom.rs b/src-tauri/src/providers/claude_custom.rs
index 23d4264a9..f46d42e15 100644
--- a/src-tauri/src/providers/claude_custom.rs
+++ b/src-tauri/src/providers/claude_custom.rs
@@ -29,6 +29,9 @@ fn create_http_client() -> Client {
         .connect_timeout(Duration::from_secs(30))
         .timeout(Duration::from_secs(600)) // 10 分钟总超时，支持长时间流式响应
         .tcp_keepalive(Duration::from_secs(60)) // TCP keepalive 保持连接活跃
+        .gzip(true) // 自动解压 gzip 响应
+        .brotli(true) // 自动解压 brotli 响应
+        .deflate(true) // 自动解压 deflate 响应
         .build()
         .unwrap_or_else(|_| Client::new())
 }
diff --git a/src-tauri/src/providers/openai_custom.rs b/src-tauri/src/providers/openai_custom.rs
index 99b8f4e54..a6e2794c8 100644
--- a/src-tauri/src/providers/openai_custom.rs
+++ b/src-tauri/src/providers/openai_custom.rs
@@ -3,6 +3,7 @@ use crate::models::openai::ChatCompletionRequest;
 use reqwest::Client;
 use serde::{Deserialize, Serialize};
 use std::error::Error;
+use std::time::Duration;
 
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct OpenAICustomConfig {
@@ -16,11 +17,24 @@ pub struct OpenAICustomProvider {
     pub client: Client,
 }
 
+/// 创建配置好的 HTTP 客户端
+fn create_http_client() -> Client {
+    Client::builder()
+        .connect_timeout(Duration::from_secs(30))
+        .timeout(Duration::from_secs(600)) // 10 分钟总超时
+        .tcp_keepalive(Duration::from_secs(60))
+        .gzip(true) // 自动解压 gzip 响应
+        .brotli(true) // 自动解压 brotli 响应
+        .deflate(true) // 自动解压 deflate 响应
+        .build()
+        .unwrap_or_else(|_| Client::new())
+}
+
 impl Default for OpenAICustomProvider {
     fn default() -> Self {
         Self {
             config: OpenAICustomConfig::default(),
-            client: Client::new(),
+            client: create_http_client(),
         }
     }
 }
@@ -38,7 +52,7 @@ impl OpenAICustomProvider {
                 base_url,
                 enabled: true,
             },
-            client: Client::new(),
+            client: create_http_client(),
         }
     }