style: reformat code and cleanup whitespace

Reformat code for improved readability and remove unnecessary whitespace.

Co-Authored-By: fiddlerwoaroof/git-smart-commit (gemma-4-26B-A4B-it-UD-Q5_K_XL.gguf)

crates/improvise-core/src/workbook.rs

@@ -138,7 +138,6 @@ impl Workbook {
             view.col_offset = 0;
         }
     }
-
 }
 
 #[cfg(test)]

src/draw.rs

@@ -246,8 +246,11 @@ fn draw_content(f: &mut Frame, area: Rect, app: &App) {
         }
         if app.category_panel_open {
             let a = Rect::new(side.x, y, side.width, ph);
-            let content =
+            let content = CategoryContent::new(
-                CategoryContent::new(&app.workbook.model, app.workbook.active_view(), &app.expanded_cats);
+                &app.workbook.model,
+                app.workbook.active_view(),
+                &app.expanded_cats,
+            );
             f.render_widget(Panel::new(content, &app.mode, app.cat_panel_cursor), a);
             y += ph;
         }

src/import/wizard.rs

@@ -222,7 +222,8 @@ impl ImportPipeline {
                     if let Some(val) = map.get(&measure.field).and_then(|v| v.as_f64()) {
                         let mut cell_coords = coords.clone();
                         cell_coords.push(("_Measure".to_string(), measure.field.clone()));
-                        wb.model.set_cell(CellKey::new(cell_coords), CellValue::Number(val));
+                        wb.model
+                            .set_cell(CellKey::new(cell_coords), CellValue::Number(val));
                     }
                 }
             }
@@ -1112,6 +1113,9 @@ mod tests {
             ("Date_Month".to_string(), "2026-03".to_string()),
             ("_Measure".to_string(), "Amount".to_string()),
         ]);
-        assert_eq!(wb.model.get_cell(&key).and_then(|v| v.as_f64()), Some(100.0));
+        assert_eq!(
+            wb.model.get_cell(&key).and_then(|v| v.as_f64()),
+            Some(100.0)
+        );
     }
 }

src/persistence/mod.rs

@@ -578,11 +578,7 @@ fn coord_str(key: &CellKey) -> String {
         .join(", ")
 }
 
-pub fn export_csv(
+pub fn export_csv(workbook: &Workbook, view_name: &str, path: &Path) -> Result<()> {
-    workbook: &Workbook,
-    view_name: &str,
-    path: &Path,
-) -> Result<()> {
     let view = workbook
         .views
         .get(view_name)
@@ -1429,10 +1425,7 @@ Type=Food = 42
     fn category_name_with_comma_space_in_data() {
         let mut m = Workbook::new("Test");
         m.add_category("Income, Gross").unwrap();
-        m.model
+        m.model.category_mut("Income, Gross").unwrap().add_item("A");
-            .category_mut("Income, Gross")
-            .unwrap()
-            .add_item("A");
         m.add_category("Month").unwrap();
         m.model.category_mut("Month").unwrap().add_item("Jan");
         m.model.set_cell(
@@ -1602,8 +1595,7 @@ mod parser_prop_tests {
             for (i, value) in values.into_iter().enumerate() {
                 let a = &items1[i % items1.len()];
                 let b = &items2[i % items2.len()];
-                m.model
+                m.model.set_cell(coord(&[("CatA", a), ("CatB", b)]), value);
-                    .set_cell(coord(&[("CatA", a), ("CatB", b)]), value);
             }
 
             m

src/ui/grid.rs

@@ -915,7 +915,10 @@ mod tests {
     fn formula_cell_renders_computed_value() {
         let mut m = Workbook::new("Test");
         m.add_category("Region").unwrap(); // → Column
-        m.model.category_mut("_Measure").unwrap().add_item("Revenue");
+        m.model
+            .category_mut("_Measure")
+            .unwrap()
+            .add_item("Revenue");
         m.model.category_mut("_Measure").unwrap().add_item("Cost");
         // Profit is a formula target — dynamically included in _Measure
         m.model.category_mut("Region").unwrap().add_item("East");
@@ -927,7 +930,8 @@ mod tests {
             coord(&[("_Measure", "Cost"), ("Region", "East")]),
             CellValue::Number(600.0),
         );
-        m.model.add_formula(parse_formula("Profit = Revenue - Cost", "_Measure").unwrap());
+        m.model
+            .add_formula(parse_formula("Profit = Revenue - Cost", "_Measure").unwrap());
         m.active_view_mut()
             .set_axis("_Index", crate::view::Axis::None);
         m.active_view_mut()

src/ui/tile_bar.rs

@@ -18,12 +18,7 @@ pub struct TileBar<'a> {
 }
 
 impl<'a> TileBar<'a> {
-    pub fn new(
+    pub fn new(model: &'a Model, view: &'a View, mode: &'a AppMode, tile_cat_idx: usize) -> Self {
-        model: &'a Model,
-        view: &'a View,
-        mode: &'a AppMode,
-        tile_cat_idx: usize,
-    ) -> Self {
         Self {
             model,
             view,