Cap the .abv1 import drop zone (was rendering a screen-filling arrow)

Gradio v6's gr.File defaults to a SVG arrow that scales to fill its
parent — and the parent had no height cap inside an Accordion, so it
swallowed the whole viewport below the import row.

* gr.File now passes height=120 + elem_classes=['dc-import-file']
* CSS constrains the drop zone to max-height 140px and the inner SVG
to 28x28 so it reads as a small hint rather than a poster.

app.py

@@ -2238,6 +2238,8 @@ def build_ui() -> gr.Blocks:
                     label="Drop or browse for a .abv1 bundle",
                     file_types=[".abv1", ".zip"],
                     type="filepath",
+                    height=120,
+                    elem_classes=["dc-import-file"],
                 )
                 import_status = gr.Markdown("")
             # 6-up metric tile grid: BPM / KEY / LUFS / TRUE PK / LRA / LENGTH.

theme.py

@@ -1350,6 +1350,27 @@ span.has-info {
     color: var(--coralb) !important;
 }
 
+/* ---- File-upload zones — Gradio v6 fills the drop area with a huge
+       SVG arrow that swallows the entire viewport when the parent has
+       no height cap. Constrain to a sensible 120px row + size the icon
+       down to ~28px so it reads as a hint, not a poster. */
+.dc-import-file, .dc-import-file > div,
+.dc-import-file .file-preview,
+.dc-import-file [class*="upload-container"],
+.dc-import-file .upload-button,
+.dc-import-file .file-wrap {
+    min-height: 0 !important;
+    max-height: 140px !important;
+    overflow: hidden !important;
+}
+.dc-import-file svg,
+.dc-import-file [class*="upload-container"] svg {
+    width: 28px !important;
+    height: 28px !important;
+    max-width: 28px !important;
+    max-height: 28px !important;
+}
+
 /* ---- Tab strip — flat, centered, cap-styled section index. Reads as
        a navigation header rather than a button row. */
 .tab-nav, .tabs > .tab-nav, [class*="tab-nav"] {