chore: 修复 clippy 错误（loop never loops → if-let）并应用自动修复

src/logger.rs

@@ -28,8 +28,8 @@ pub fn init_logger(log_dir: Option<&str>, with_file: bool) {
         .with_target(false)
         .with_ansi(true);
 
-    if with_file {
-        if let Some(dir) = log_dir {
+    if with_file
+        && let Some(dir) = log_dir {
             let dir_path = PathBuf::from(dir);
             std::fs::create_dir_all(&dir_path).ok();
 
@@ -46,7 +46,6 @@ pub fn init_logger(log_dir: Option<&str>, with_file: bool) {
                 .init();
             return;
         }
-    }
 
     tracing_subscriber::registry()
         .with(env_filter)