Disable SSR (ssr_mode=False) to fix regen Too many arguments

Gradio 5.25 SSR is experimental and its client-side argument count
validation (map_data_to_params) rejects .change() calls before they
reach Python, regardless of whether input/output counts are correct.

Disabling SSR (ssr_mode=False in launch()) bypasses this validation
entirely and lets .change() events reach the Python handlers normally.

Also adds startup prints to confirm logging is working and all 8
per-slot regen handlers are registered at app startup.

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

app.py

@@ -1684,6 +1684,7 @@ with gr.Blocks(title="Generate Audio for Video", css=_SLOT_CSS, js=_GLOBAL_JS) a
             # Per-slot regen trigger wiring for TARO
             for _i, _rtrig in enumerate(taro_slot_rtrigs):
                 _slot_id = f"taro_{_i}"
+                print(f"[startup] registering regen handler for slot {_slot_id}")
                 def _make_taro_regen(_si, _sid):
                     def _do(trigger_val, video, seed, cfg, steps, mode, cf_dur, cf_db):
                         print(f"[regen TARO] trigger_val_len={len(trigger_val) if trigger_val else 0} video={video!r}")
@@ -1917,4 +1918,5 @@ with gr.Blocks(title="Generate Audio for Video", css=_SLOT_CSS, js=_GLOBAL_JS) a
     mma_video.change(fn=_sync,  inputs=[mma_video],  outputs=[taro_video, hf_video])
     hf_video.change(fn=_sync,   inputs=[hf_video],   outputs=[taro_video, mma_video])
 
-demo.queue(max_size=10).launch()
+print("[startup] app.py fully loaded — regen handlers registered, SSR disabled")
+demo.queue(max_size=10).launch(ssr_mode=False)