Disable MCP server on Modal deployment

MCP server causes issues on Modal. Use ENABLE_MCP_SERVER env var to control.
- Locally: MCP enabled by default
- Modal: MCP disabled

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app.py

@@ -315,10 +315,13 @@ input::placeholder, textarea::placeholder {
 """
 
 if __name__ == "__main__":
+    # MCP server only works locally, not on Modal
+    enable_mcp = os.getenv("ENABLE_MCP_SERVER", "true").lower() == "true"
+
     app.launch(
         server_name="0.0.0.0",
         server_port=7860,
         share=False,
         css=CUSTOM_CSS,
-        mcp_server=True,  # Enable MCP server - exposes this app as an MCP tool!
+        mcp_server=enable_mcp,
     )

modal_app.py

@@ -38,6 +38,9 @@ def serve():
     """Serve the Gradio app via web_server."""
     import subprocess
     import os
+
+    # Disable MCP server on Modal (causes issues)
+    os.environ["ENABLE_MCP_SERVER"] = "false"
     os.chdir("/app")
     subprocess.Popen(["python", "app.py"])