* Refactored MCPService to implement a singleton pattern for better instance management.
* Updated IPC registration to utilize the new getMcpInstance method for handling MCP-related requests.
* Removed redundant IPC handlers from the main index file and centralized them in the ipc module.
* Added background throttling option in WindowService configuration to enhance performance.
* Introduced delays in MCPToolsButton to optimize resource and prompt fetching after initial load.
