style: cleanup formatting and code style across the project

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)

src/draw.rs

@@ -257,6 +257,7 @@ fn draw_content(f: &mut Frame, area: Rect, app: &App) {
     f.render_widget(
         GridWidget::new(
             &app.model,
+            &app.layout,
             &app.mode,
             &app.search_query,
             &app.buffers,
@@ -282,11 +283,7 @@ fn draw_bottom_bar(f: &mut Frame, area: Rect, app: &App) {
             Some((format!("edit: {buf}▌"), Color::Green))
         }
         AppMode::FormulaEdit { .. } => {
-            let buf = app
-                .buffers
-                .get("formula")
-                .map(|s| s.as_str())
-                .unwrap_or("");
+            let buf = app.buffers.get("formula").map(|s| s.as_str()).unwrap_or("");
             Some((format!("formula: {buf}▌"), Color::Cyan))
         }
         AppMode::CategoryAdd { .. } => {
@@ -302,11 +299,7 @@ fn draw_bottom_bar(f: &mut Frame, area: Rect, app: &App) {
             Some((format!("add item to {category}: {buf}▌"), Color::Green))
         }
         AppMode::ExportPrompt { .. } => {
-            let buf = app
-                .buffers
-                .get("export")
-                .map(|s| s.as_str())
-                .unwrap_or("");
+            let buf = app.buffers.get("export").map(|s| s.as_str()).unwrap_or("");
             Some((format!("export path: {buf}▌"), Color::Yellow))
         }
         _ => None,
@@ -349,7 +342,6 @@ fn draw_status(f: &mut Frame, area: Rect, app: &App) {
     f.render_widget(Paragraph::new(line).style(mode_style(&app.mode)), area);
 }
 
-
 fn draw_welcome(f: &mut Frame, area: Rect) {
     let popup = centered_popup(area, 58, 20);
     let inner = draw_popup_frame(f, popup, "  Welcome to improvise  ", Color::Blue);