Feat: entretien de la codebase

crates/ratatui/src/section_header.rs

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+use ratatui::layout::{Constraint, Layout, Rect};
+use ratatui::style::{Modifier, Style};
+use ratatui::widgets::Paragraph;
+use ratatui::Frame;
+
+use crate::theme;
+
+pub fn render_section_header(frame: &mut Frame, title: &str, focused: bool, area: Rect) {
+    let theme = theme::get();
+    let [header_area, divider_area] =
+        Layout::vertical([Constraint::Length(1), Constraint::Length(1)]).areas(area);
+
+    let header_style = if focused {
+        Style::new()
+            .fg(theme.engine.header_focused)
+            .add_modifier(Modifier::BOLD)
+    } else {
+        Style::new()
+            .fg(theme.engine.header)
+            .add_modifier(Modifier::BOLD)
+    };
+
+    frame.render_widget(Paragraph::new(title).style(header_style), header_area);
+
+    let divider = "─".repeat(area.width as usize);
+    frame.render_widget(
+        Paragraph::new(divider).style(Style::new().fg(theme.engine.divider)),
+        divider_area,
+    );
+}