test: use gpt-oss-20b to do some minor refactoring

src/main.rs

@@ -26,6 +26,11 @@ use ratatui::{
 
 use model::Model;
 use ui::app::{App, AppMode};
+
+fn render_paragraph(f: &mut Frame, area: Rect, text: &str, style: Style) {
+    f.render_widget(Paragraph::new(text).style(style), area);
+}
+
 use ui::category_panel::CategoryPanel;
 use ui::formula_panel::FormulaPanel;
 use ui::grid::GridWidget;
@@ -332,14 +337,14 @@ fn draw_title(f: &mut Frame, area: Rect, app: &App) {
     let right = " ?:help  :q quit ";
     let pad = " ".repeat((area.width as usize).saturating_sub(title.len() + right.len()));
     let line = format!("{title}{pad}{right}");
-    f.render_widget(
+    render_paragraph(
-        Paragraph::new(line).style(
+        f,
+        area,
+        &line,
         Style::default()
             .fg(Color::Black)
             .bg(Color::Blue)
             .add_modifier(Modifier::BOLD),
-        ),
-        area,
     );
 }
 
@@ -450,7 +455,7 @@ fn draw_status(f: &mut Frame, area: Rect, app: &App) {
         _ => Style::default().fg(Color::Black).bg(Color::DarkGray),
     };
 
-    f.render_widget(Paragraph::new(line).style(badge_style), area);
+    render_paragraph(f, area, &line, badge_style);
 }
 
 fn draw_command_bar(f: &mut Frame, area: Rect, app: &App) {
@@ -460,9 +465,11 @@ fn draw_command_bar(f: &mut Frame, area: Rect, app: &App) {
         ""
     };
     let line = format!(":{buf}▌");
-    f.render_widget(
+    render_paragraph(
-        Paragraph::new(line).style(Style::default().fg(Color::White).bg(Color::Black)),
+        f,
         area,
+        &line,
+        Style::default().fg(Color::White).bg(Color::Black),
     );
 }
 
@@ -484,9 +491,11 @@ fn draw_export_prompt(f: &mut Frame, area: Rect, app: &App) {
         .title(" Export CSV — path (Esc cancel) ");
     let inner = block.inner(popup_area);
     f.render_widget(block, popup_area);
-    f.render_widget(
+    render_paragraph(
-        Paragraph::new(format!("{buf}▌")).style(Style::default().fg(Color::Green)),
+        f,
         inner,
+        &format!("{buf}▌"),
+        Style::default().fg(Color::Green),
     );
 }
 

src/ui/grid.rs

@@ -291,7 +291,7 @@ impl<'a> GridWidget<'a> {
                         };
                         let value = self.model.evaluate(&key);
 
-                        let cell_str = format_value(value.as_ref(), fmt_comma, fmt_decimals);
+                        let cell_str = format_cell_value(value.as_ref(), &view.number_format);
                         let is_selected = ri == sel_row && ci == sel_col;
                         let is_search_match = !self.search_query.is_empty()
                             && cell_str
@@ -435,7 +435,7 @@ impl<'a> Widget for GridWidget<'a> {
     }
 }
 
-fn format_value(v: Option<&CellValue>, comma: bool, decimals: u8) -> String {
+pub fn format_value(v: Option<&CellValue>, comma: bool, decimals: u8) -> String {
     match v {
         Some(CellValue::Number(n)) => format_f64(*n, comma, decimals),
         Some(CellValue::Text(s)) => s.clone(),
@@ -443,6 +443,11 @@ fn format_value(v: Option<&CellValue>, comma: bool, decimals: u8) -> String {
     }
 }
 
+fn format_cell_value(v: Option<&CellValue>, fmt: &str) -> String {
+    let (comma, decimals) = parse_number_format(fmt);
+    format_value(v, comma, decimals)
+}
+
 pub fn parse_number_format(fmt: &str) -> (bool, u8) {
     let comma = fmt.contains(',');
     let decimals = fmt