feat: persist custom endpoints to settings.json

- Extend AppSettings to store custom endpoints for Claude and Codex
- Add Tauri commands: get/add/remove/update custom endpoints
- Update frontend API with endpoint persistence methods
- Modify EndpointSpeedTest to load/save custom endpoints via API
- Track endpoint last used time for future sorting/cleanup
- Store endpoints per app type in settings.json instead of localStorage

src-tauri/src/settings.rs

@@ -1,8 +1,19 @@
 use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
 use std::fs;
 use std::path::PathBuf;
 use std::sync::{OnceLock, RwLock};
 
+/// 自定义端点配置
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CustomEndpoint {
+    pub url: String,
+    pub added_at: i64,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub last_used: Option<i64>,
+}
+
 /// 应用设置结构，允许覆盖默认配置目录
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
@@ -17,6 +28,12 @@ pub struct AppSettings {
     pub codex_config_dir: Option<String>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub language: Option<String>,
+    /// Claude 自定义端点列表
+    #[serde(default, skip_serializing_if = "HashMap::is_empty")]
+    pub custom_endpoints_claude: HashMap<String, CustomEndpoint>,
+    /// Codex 自定义端点列表
+    #[serde(default, skip_serializing_if = "HashMap::is_empty")]
+    pub custom_endpoints_codex: HashMap<String, CustomEndpoint>,
 }
 
 fn default_show_in_tray() -> bool {
@@ -35,6 +52,8 @@ impl Default for AppSettings {
             claude_config_dir: None,
             codex_config_dir: None,
             language: None,
+            custom_endpoints_claude: HashMap::new(),
+            custom_endpoints_codex: HashMap::new(),
         }
     }
 }