- Enhanced `GATEWAY_RUN.md` with detailed debugging steps for handling **400** errors in Mihomo routes, clarifying the configuration requirements and common pitfalls.
- Updated comments in `internal/proxy/mihomo.go` to reflect changes in error handling and proxy behavior, linking to the new debugging section in the documentation.
- Modified the Svelte component logic to ensure proper filtering of selectable groups, improving the user interface for managing Mihomo proxies.