Add per-app storage breakdown to detail view

src/ui/detail_view.rs

@@ -1523,6 +1523,22 @@ fn build_storage_tab(
     size_group.add(&appimage_row);
 
     if !fp.paths.is_empty() {
+        let categories = [
+            ("Configuration", fp.config_size),
+            ("Application data", fp.data_size),
+            ("Cache", fp.cache_size),
+            ("State", fp.state_size),
+            ("Other", fp.other_size),
+        ];
+        for (label, size) in &categories {
+            if *size > 0 {
+                let row = adw::ActionRow::builder()
+                    .title(*label)
+                    .subtitle(&widgets::format_size(*size as i64))
+                    .build();
+                size_group.add(&row);
+            }
+        }
         let data_total = fp.data_total();
         if data_total > 0 {
             let total_row = adw::ActionRow::builder()