Fix regen: render=False on hidden Textboxes to stop 'Too many arguments' error

Gradio's Svelte client throws api_info.ts:423 'Too many arguments provided
for the endpoint' when gr.Textbox(visible=False) components are in the
inputs list — the client counts them as DOM components and rejects the call.

Switching to render=False prevents any DOM element from being created, so
Gradio's internal validation no longer sees them as extra inputs. The JS
fireRegen() still passes values at the correct positional index via the
direct queue/join fetch, which bypasses Svelte validation entirely.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app.py

@@ -1777,11 +1777,12 @@ with gr.Blocks(title="Generate Audio for Video", css=_SLOT_CSS, js=_GLOBAL_JS) a
                     (taro_slot_grps, taro_slot_vids,
                      taro_slot_waves) = _make_output_slots("taro")
 
-            # Hidden regen plumbing — gr.Textbox(visible=False) so JS can pass
-            # values directly via the queue/join data array (gr.State is server-side
-            # and ignores data array values; Textbox is client-side and accepts them).
-            taro_regen_seg   = gr.Textbox(value="0", visible=False)
-            taro_regen_state = gr.Textbox(value="", visible=False)
+            # Hidden regen plumbing — render=False so no DOM element is created,
+            # avoiding Gradio's "Too many arguments" Svelte validation error.
+            # JS passes values directly via queue/join data array at the correct
+            # positional index (these show up as inputs to the fn but have no DOM).
+            taro_regen_seg   = gr.Textbox(value="0", render=False)
+            taro_regen_state = gr.Textbox(value="", render=False)
 
             for trigger in [taro_video, taro_steps, taro_cf_dur]:
                 trigger.change(
@@ -1886,10 +1887,10 @@ with gr.Blocks(title="Generate Audio for Video", css=_SLOT_CSS, js=_GLOBAL_JS) a
                     (mma_slot_grps, mma_slot_vids,
                      mma_slot_waves) = _make_output_slots("mma")
 
-            # Hidden regen plumbing — gr.Textbox(visible=False) so JS can pass
-            # values directly via the queue/join data array.
-            mma_regen_seg   = gr.Textbox(value="0", visible=False)
-            mma_regen_state = gr.Textbox(value="", visible=False)
+            # Hidden regen plumbing — render=False so no DOM element is created,
+            # avoiding Gradio's "Too many arguments" Svelte validation error.
+            mma_regen_seg   = gr.Textbox(value="0", render=False)
+            mma_regen_state = gr.Textbox(value="", render=False)
 
             mma_samples.change(
                 fn=_update_slot_visibility,
@@ -1978,10 +1979,10 @@ with gr.Blocks(title="Generate Audio for Video", css=_SLOT_CSS, js=_GLOBAL_JS) a
                     (hf_slot_grps, hf_slot_vids,
                      hf_slot_waves) = _make_output_slots("hf")
 
-            # Hidden regen plumbing — gr.Textbox(visible=False) so JS can pass
-            # values directly via the queue/join data array.
-            hf_regen_seg    = gr.Textbox(value="0", visible=False)
-            hf_regen_state  = gr.Textbox(value="", visible=False)
+            # Hidden regen plumbing — render=False so no DOM element is created,
+            # avoiding Gradio's "Too many arguments" Svelte validation error.
+            hf_regen_seg    = gr.Textbox(value="0", render=False)
+            hf_regen_state  = gr.Textbox(value="", render=False)
 
             hf_samples.change(
                 fn=_update_slot_visibility,