Hide the download file box until Get Files is clicked

It was defaulting to visible=True, so an empty "Download" file box showed up
on page load even before any translation or download attempt.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app.py

@@ -107,7 +107,7 @@ def build_app() -> gr.Blocks:
                     label="Files to include", choices=[], value=[], visible=False, scale=2,
                 )
                 get_files_btn = gr.Button("Get Files", variant="primary", scale=0, min_width=100, visible=False)
-            download_zip = gr.File(label="Download", visible=True, interactive=False)
+            download_zip = gr.File(label="Download", visible=False, interactive=False)
 
             slot_groups, slot_sources, slot_targets, slot_translate_btns = [], [], [], []
 

tests/test_app.py

@@ -19,3 +19,15 @@ def test_build_app_falls_back_gracefully_if_model_fetch_fails():
          patch("app.DEFAULT_MODEL", "model/a"):
         demo = build_app()
     assert demo is not None
+
+
+def test_download_file_hidden_until_get_files_clicked():
+    with patch("app.list_model_choices", return_value=["model/a"]), \
+         patch("app.DEFAULT_MODEL", "model/a"):
+        demo = build_app()
+    download_components = [
+        b for b in demo.blocks.values()
+        if b.__class__.__name__ == "File" and b.label == "Download"
+    ]
+    assert len(download_components) == 1
+    assert download_components[0].visible is False