Move Sound Effects into its own top-level tab

Was a section tacked onto Pipeline Studio; Steve asked for it as a
separate tab instead to keep the existing tabs from getting crowded.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01SN15Vxn4svKuhYxFsVtMJf

webui/app.py

@@ -806,24 +806,6 @@ with gr.Blocks(title="Audio-demo pipeline studio") as demo:
                     save_char_btn = gr.Button("Save as new character (status: draft)")
                     save_char_status = gr.Markdown()
 
-            with gr.Row():
-                with gr.Column():
-                    gr.Markdown(
-                        "## 5. Sound effects (MOSS-SoundEffect)\n"
-                        "Text-only ambience/SFX generation - no reference audio or character "
-                        "voice involved, a separate model from the voice pipeline above."
-                    )
-                    sfx_description = gr.Textbox(
-                        label="Description",
-                        placeholder=(
-                            'e.g. "A door creaking open slowly, then closing with a soft thud." '
-                            'or "A busy outdoor market with distant chatter and footsteps."'
-                        ),
-                        lines=2,
-                    )
-                    sfx_btn = gr.Button("Generate sound effect", variant="primary")
-                    sfx_audio = gr.Audio(label="Generated sound effect", type="filepath")
-
             strip_btn.click(strip_vocals, inputs=[input_audio], outputs=[vocals_out, no_vocals_out])
             use_vocals_btn.click(
                 use_as_reference, inputs=[vocals_out, history_state],
@@ -862,6 +844,23 @@ with gr.Blocks(title="Audio-demo pipeline studio") as demo:
                 inputs=[new_char_name, new_char_role, new_char_prose, gen_language, current_ref_audio, history_state],
                 outputs=[save_char_status],
             )
+        with gr.Tab("Sound Effects"):
+            gr.Markdown(
+                "# Sound effects (MOSS-SoundEffect)\n"
+                "Text-only ambience/SFX generation - a separate model from the "
+                "voice pipeline in Pipeline Studio, no reference audio or "
+                "character voice involved."
+            )
+            sfx_description = gr.Textbox(
+                label="Description",
+                placeholder=(
+                    'e.g. "A door creaking open slowly, then closing with a soft thud." '
+                    'or "A busy outdoor market with distant chatter and footsteps."'
+                ),
+                lines=2,
+            )
+            sfx_btn = gr.Button("Generate sound effect", variant="primary")
+            sfx_audio = gr.Audio(label="Generated sound effect", type="filepath")
             sfx_btn.click(generate_sound_effect, inputs=[sfx_description], outputs=[sfx_audio])
 
         with gr.Tab("Characters"):