Clean up formatting and code style across the project.
- Remove unnecessary whitespace and empty lines in `src/model/cell.rs` ,
`src/model/types.rs` , and `src/draw.rs` .
- Reformat long lines and function calls in `src/command/cmd.rs` ,
`src/ui/grid.rs` , and `src/ui/tile_bar.rs` for better readability.
- Consolidate imports and simplify expressions in `src/command/keymap.rs` and
`src/ui/app.rs` .
Co-Authored-By: fiddlerwoaroof/git-smart-commit (unsloth/gemma-4-26B-A4B-it-GGUF:UD-Q5_K_XL)
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