"placeholder" removed

app.py

@@ -306,7 +306,7 @@ def handle_calculate_cost(dialogue_script: str, tts_model: str):
              return "Cost: $0.000000 (No valid lines)"
         cost = calculate_cost(total_chars, len(parsed_lines), tts_model)
         return f"Estimated OpenAI Cost: ${cost:.6f} (for {total_chars} characters in {len(parsed_lines)} lines)"
-    except ValueError as e:
+    except ValueError as e: # Handles MAX_SCRIPT_LENGTH
         return f"Error: {str(e)}"
     except Exception as e:
         return f"Error calculating cost: {str(e)}"
@@ -363,11 +363,19 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
             interactive=True
         )
     
+    initial_json_config_example = """
+[
+  {"speaker": "Alice", "voice": "nova", "speed": 1.1, "instructions": "sound excited"},
+  {"speaker": "Bob", "voice": "echo"},
+  {"speaker": "Narrator", "voice": "shimmer", "instructions": "be very serious"}
+]
+    """.strip()
+
     detailed_speaker_config_input = gr.Code(
         label="Detailed Speaker Configuration (JSON)",
         language="json",
         lines=7,
-        placeholder='[\n  {"speaker": "Alice", "voice": "nova", "speed": 1.1, "instructions": "sound excited"},\n  {"speaker": "Bob", "voice": "echo"},\n  {"speaker": "Narrator", "voice": "shimmer", "instructions": "be very serious"}\n]',
+        value=initial_json_config_example, # Corrected: Use value for default content
         visible=(DEFAULT_SPEAKER_CONFIG_METHOD == "Detailed Configuration (JSON)"),
         info="Define voice, and optionally model-compatible speed/instructions per speaker."
     )