Add portable mode with removable media detection and scanning

src/ui/detail_view.rs

@@ -1800,6 +1800,22 @@ fn build_storage_tab(
         .build();
     size_group.add(&appimage_row);
 
+    if record.is_portable {
+        let location_label = if let Some(ref mp) = record.mount_point {
+            format!("Portable ({})", mp)
+        } else {
+            "Portable (removable media)".to_string()
+        };
+        let location_row = adw::ActionRow::builder()
+            .title("Location")
+            .subtitle(&location_label)
+            .build();
+        let badge = widgets::status_badge("Portable", "info");
+        badge.set_valign(gtk::Align::Center);
+        location_row.add_suffix(&badge);
+        size_group.add(&location_row);
+    }
+
     if !fp.paths.is_empty() {
         let categories = [
             ("Configuration", fp.config_size),