fix(antdx): FileCard / FileCard.List.Item crash when src is a file dict without url

Both constructors handle a `src` dict that has a `path` but no `url` by
serving the local file, but the branch referenced `self.item`, an attribute
that does not exist on either class, so the constructor raised
AttributeError instead. The next line then unconditionally overwrote
`self.src` with the raw dict, so the branch could never take effect even if
the lookup had worked.

Read the path from `src` itself and merge the served file info back into
`src` before the assignment, which is what the code was written to do.
Behaviour for string, url-bearing dict and empty `src` values is unchanged.

Author: Linxiushen

.changeset/fix-file-card-src-dict.md

@@ -0,0 +1,5 @@
+---
+'modelscope_studio': patch
+---
+
+fix: `antdx.FileCard` and `antdx.FileCard.List.Item` raise `AttributeError` when `src` is a file dict without a `url`

backend/modelscope_studio/components/antdx/file_card/__init__.py

@@ -88,7 +88,7 @@ def __init__(
             self.src = self.serve_static_file(src)
         elif isinstance(src, dict):
             if not src.get("url", None) and src.get("path", None):
-                self.src = {**src, **self.serve_static_file(self.item["path"])}
+                src = {**src, **self.serve_static_file(src["path"])}
             self.src = src
 
     FRONTEND_DIR = resolve_frontend_dir('file-card', type="antdx")

backend/modelscope_studio/components/antdx/file_card/list/item/__init__.py

@@ -85,7 +85,7 @@ def __init__(
             self.src = self.serve_static_file(src)
         elif isinstance(src, dict):
             if not src.get("url", None) and src.get("path", None):
-                self.src = {**src, **self.serve_static_file(self.item["path"])}
+                src = {**src, **self.serve_static_file(src["path"])}
             self.src = src
 
     FRONTEND_DIR = resolve_frontend_dir('file-card', ['list', 'item'],