clean ui

backend/src/plugins/storage/plugin.py

@@ -228,6 +228,25 @@ class StoragePlugin(PluginBase):
                 f"[StoragePlugin][Action] Listing files in root: {root}, category: {category}, subpath: {subpath}, recursive: {recursive}"
             )
             files = []
+
+            # Root view contract: show category directories only.
+            if category is None and not subpath:
+                for cat in FileCategory:
+                    base_dir = root / cat.value
+                    if not base_dir.exists():
+                        continue
+                    stat = base_dir.stat()
+                    files.append(
+                        StoredFile(
+                            name=cat.value,
+                            path=cat.value,
+                            size=0,
+                            created_at=datetime.fromtimestamp(stat.st_ctime),
+                            category=cat,
+                            mime_type="directory",
+                        )
+                    )
+                return sorted(files, key=lambda x: x.name)
             
             categories = [category] if category else list(FileCategory)