fix: handle PathBuf correctly

src/command/types.rs

@@ -1,3 +1,5 @@
+use std::path::PathBuf;
+
 use crate::view::Axis;
 use serde::{Deserialize, Serialize};
 
@@ -80,7 +82,7 @@ pub enum Command {
 
     /// Import a JSON file via the analyzer (non-interactive, uses auto-detected proposals).
     ImportJson {
-        path: String,
+        path: PathBuf,
         model_name: Option<String>,
         /// Dot-path to the records array (empty = root)
         array_path: Option<String>,