feat(mcp): Change default port from 8000 to 8080

- Aligns with WEB_HOST environment variable
- External URL: https://d8d-ai-vscode-8080-223-236-template-6-group.dev.d8d.fun/sse

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

src/mcp_server/server.py

@@ -742,7 +742,7 @@ async def main():
     """Main entry point for the MCP server (HTTP mode)."""
     # Get configuration from environment
     host = os.getenv("MCP_HOST", "0.0.0.0")
-    port = int(os.getenv("MCP_PORT", "8000"))
+    port = int(os.getenv("MCP_PORT", "8080"))
 
     print(f"Starting Novel Translator MCP Server on http://{host}:{port}")
     print(f"Transport: SSE (Server-Sent Events)")