style: remove tab separators

docs/editing.md

@@ -218,7 +218,7 @@ Use `:tab.new` to open the current buffer in a new, focused tab with one pane. E
 | `:tab.close` | `config.core.tab.close` | Close the current tab and all its panes, protecting unsaved changes |
 | `:tab.force_close` | `config.core.tab.force_close` | Explicitly discard exclusively displayed edits and close the tab |
 
-Multiple tabs show a single top row with padded numbered filenames, subtle separators, and dirty markers. The active tab uses bold accent text; the row keeps the terminal's background instead of painting a full-width band. Narrow terminals keep the active tab visible. New/close actions have no default keybinding; for example, `config.bind "leader t", config.core.tab.new`.
+Multiple tabs show a single top row with padded numbered filenames and dirty markers. The active tab uses bold accent text; the row keeps the terminal's background instead of painting a full-width band. Narrow terminals keep the active tab visible. New/close actions have no default keybinding; for example, `config.bind "leader t", config.core.tab.new`.
 
 Closing a tab refuses dirty buffers whose final displayed owner would disappear, including a comparison's working and return buffers. Buffers displayed in another tab remain open with their edits, even on force-close. Other hidden buffers remain loaded. Closing the last tab quits only if every open buffer is clean; force-close quits without saving.
 

src/tui.rs

@@ -1042,21 +1042,13 @@ fn draw_tab_bar(frame: &mut Frame, editor: &Editor, area: Rect) -> Rect {
     let mut first = active;
     let padding = u16::from(bar.width > 1);
     let mut width = labels[active].width() + usize::from(padding);
-    while first > 0 && width + 2 + labels[first - 1].width() <= usize::from(bar.width) {
+    while first > 0 && width + labels[first - 1].width() <= usize::from(bar.width) {
         first -= 1;
-        width += 2 + labels[first].width();
+        width += labels[first].width();
     }
     let inactive = Style::default().fg(Color::Gray);
     let mut x = bar.x + padding;
     for (index, label) in labels.iter().enumerate().skip(first) {
-        if index != first {
-            let width = 2.min(bar.right() - x);
-            frame.render_widget(
-                Paragraph::new("│ ").style(Style::default().fg(Color::DarkGray)),
-                Rect::new(x, bar.y, width, 1),
-            );
-            x += width;
-        }
         let width = label.width().min(usize::from(bar.right() - x)) as u16;
         let style = if index == active {
             Style::default()