Disable dropdown filtering so all options always show

The config/cast dropdowns are short fixed lists, but Gradio's default
filterable mode put the current value into a text box and filtered the
list on open — collapsing it (e.g. SOUND BED showed only "No music").
Set filterable=False on FORMAT, LENGTH, SOUND BED and the Cast voice
pickers so a click shows the full list.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app.py

@@ -837,17 +837,19 @@ def build_ui():
 
                         with gr.Row(elem_classes=["pf-config"], equal_height=True):
                             with gr.Column(elem_classes=["pf-config-card"]):
-                                style = gr.Dropdown(STYLES, value="interview", label="FORMAT")
+                                style = gr.Dropdown(STYLES, value="interview", label="FORMAT",
+                                                    filterable=False)
                             with gr.Column(elem_classes=["pf-config-card"]):
                                 duration = gr.Dropdown(
                                     [("1 min", 1), ("2 min", 2)],
-                                    value=2, label="LENGTH",
+                                    value=2, label="LENGTH", filterable=False,
                                 )
                             with gr.Column(elem_classes=["pf-config-card"]):
                                 num_speakers = gr.Slider(1, MAX_SPEAKERS, value=2, step=1, label="VOICES")
                             with gr.Column(elem_classes=["pf-config-card"]):
                                 bed_step1 = gr.Dropdown(
                                     [b[0] for b in SOUND_BEDS], value="Ambient Drift", label="SOUND BED",
+                                    filterable=False,
                                 )
 
                         # ---- Cast: pick the voice used for each speaker ----
@@ -865,7 +867,7 @@ def build_ui():
                                     vp = gr.Dropdown(
                                         LIBRARY_VOICE_NAMES, value=default,
                                         label=f"Speaker {i + 1}", visible=(i < 2),
-                                        elem_classes=["pf-config-card"],
+                                        elem_classes=["pf-config-card"], filterable=False,
                                     )
                                     voice_pickers.append(vp)