fix: 백엔드 주소 하드코딩 제거 — XGEN_SERVER_URL/XGEN_APP_MODE 환경변수 지원

- XGEN_SERVER_URL: 백엔드 서버 주소 (기본: https://xgen.x2bee.com)
- XGEN_APP_MODE: 앱 모드 (기본: connected, standalone도 가능)
- settings.json > 환경변수 > 기본값 순서로 우선순위 적용
- cli.rs: state.get_server_url() → 환경변수 → 기본값

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: SonAIengine

src-tauri/src/commands/cli.rs

@@ -86,6 +86,7 @@ pub async fn cli_send_message(
 ) -> Result<CliResponse> {
     // Get XGEN API base URL
     let base_url = state.get_server_url().await
+        .or_else(|| std::env::var("XGEN_SERVER_URL").ok())
         .unwrap_or_else(|| "https://xgen.x2bee.com".to_string());
 
     // Use token: prefer passed token, fallback to session stored token
@@ -177,6 +178,7 @@ pub async fn cli_list_providers(
     xgen_token: Option<String>,
 ) -> Result<Value> {
     let base_url = state.get_server_url().await
+        .or_else(|| std::env::var("XGEN_SERVER_URL").ok())
         .unwrap_or_else(|| "https://xgen.x2bee.com".to_string());
     let token = xgen_token.or_else(|| {
         let session = state.cli_session.try_read().ok();

src-tauri/src/lib.rs

@@ -28,15 +28,23 @@ async fn auto_init_app_mode(app: &tauri::AppHandle) -> Result<(), String> {
 
     let config_path = config_dir.join("settings.json");
 
-    // Check if settings file exists — 없으면 기본 Connected 모드 (xgen.x2bee.com)
+    // Check if settings file exists — 없으면 환경변수 또는 기본값으로 Connected 모드
     if !config_path.exists() {
-        log::info!("No settings file found, defaulting to Connected mode (xgen.x2bee.com)");
-        let state = app.state::<Arc<AppState>>();
-        let default_url = "https://xgen.x2bee.com".to_string();
-        let mut mode = state.app_mode.write().await;
-        *mode = state::AppMode::Connected { server_url: default_url.clone() };
-        let mut gateway = state.gateway_url.write().await;
-        *gateway = Some(default_url);
+        let default_url = std::env::var("XGEN_SERVER_URL")
+            .unwrap_or_else(|_| "https://xgen.x2bee.com".to_string());
+        let default_mode = std::env::var("XGEN_APP_MODE")
+            .unwrap_or_else(|_| "connected".to_string());
+
+        if default_mode == "connected" {
+            log::info!("No settings file, using {} mode: {}", default_mode, default_url);
+            let state = app.state::<Arc<AppState>>();
+            let mut mode = state.app_mode.write().await;
+            *mode = state::AppMode::Connected { server_url: default_url.clone() };
+            let mut gateway = state.gateway_url.write().await;
+            *gateway = Some(default_url);
+        } else {
+            log::info!("No settings file, using Standalone mode");
+        }
         return Ok(());
     }