v0.2.14 : aide Nushell, themes de couleurs et cadres blancs

- Aide facon Nushell : help <cmd>, <cmd> -h/--help, help, help commands,
  help --find <texte>, help <agent> (fiche info) - sections Usage/Flags/
  Command Type/Parameters/Input-output/Examples avec couleurs
- Commande version : tableau Nushell (commit, build, rustc, theme...) + --json ;
  build.rs pour commit/branche git ; -V reste la version courte
- Themes : --theme <nom> (default, ocean, sunset, forest, dracula, mono)
  + settings.theme dans la config ; activation VT Windows pour les couleurs
- Cadres blancs Nushell partages : list, search, status, doctor, ls/ps/
  where/get et menu d autocompletion Tab encadre (colonnes name/description)

src/tables.rs

@@ -58,6 +58,26 @@ impl DataTable {
     /// truncated with an ellipsis and the trailing columns are dropped if
     /// that is still not enough — every row stays on a single line.
     pub fn render(&self, color: bool, max_width: usize) -> String {
+        self.render_with(None, color, max_width)
+    }
+
+    /// Render with the colors of a theme (borders dimmed, header row in the
+    /// theme's header style instead of plain bold).
+    pub fn render_themed(
+        &self,
+        theme: &crate::theme::Theme,
+        color: bool,
+        max_width: usize,
+    ) -> String {
+        self.render_with(Some(theme), color, max_width)
+    }
+
+    fn render_with(
+        &self,
+        theme: Option<&crate::theme::Theme>,
+        color: bool,
+        max_width: usize,
+    ) -> String {
         let max_width = max_width.max(20);
         let headers = self.columns.clone();
         if headers.is_empty() {
@@ -133,13 +153,16 @@ impl DataTable {
             line.push(right);
             line
         };
-        let row_line = |row: &[String], bold: bool| -> String {
+        let row_line = |row: &[String], header: bool| -> String {
             let mut line = String::from("│");
             for (i, c) in row.iter().enumerate().take(all_widths.len()) {
                 line.push(' ');
                 let cell = fit_cell(c, all_widths[i]);
-                let rendered = if bold {
-                    cell.bold().to_string()
+                let rendered = if header {
+                    match theme {
+                        Some(t) if color => t.hdr(&cell),
+                        _ => cell.bold().to_string(),
+                    }
                 } else {
                     cell
                 };
@@ -149,26 +172,28 @@ impl DataTable {
             }
             line
         };
-        let dim = |s: &str| -> String {
-            if color {
-                s.dimmed().to_string()
-            } else {
-                s.to_string()
+        let edge = |s: &str| -> String {
+            if !color {
+                return s.to_string();
+            }
+            match theme {
+                Some(t) => t.dimmed(s),
+                None => s.dimmed().to_string(),
             }
         };
 
         let mut out = String::new();
-        out.push_str(&dim(&border('╭', '┬', '╮')));
+        out.push_str(&edge(&border('╭', '┬', '╮')));
         out.push('\n');
         out.push_str(&row_line(&all_headers, true));
         out.push('\n');
-        out.push_str(&dim(&border('├', '┼', '┤')));
+        out.push_str(&edge(&border('├', '┼', '┤')));
         out.push('\n');
         for line in &cells {
             out.push_str(&row_line(line, false));
             out.push('\n');
         }
-        out.push_str(&dim(&border('╰', '┴', '╯')));
+        out.push_str(&edge(&border('╰', '┴', '╯')));
         out.push('\n');
         out
     }