Reformat Rust code with rustfmt, suppress clippy::too_many_arguments for Tauri IPC commands, derive Default for AppSettings, fix unused variable pattern in TableDataView, and add unit tests for utils.
Reformat Rust code with rustfmt, suppress clippy::too_many_arguments for Tauri IPC commands, derive Default for AppSettings, fix unused variable pattern in TableDataView, and add unit tests for utils.