feat(styles): mark the current style with a ✓ in the list

Every style manager now shows a leading ✓ next to the current style
(current text/dim style, active table/multileader/multiline style), with
the other rows padded so names stay aligned. The marker replaces the
multileader/multiline-only ◀ and is wired for all five managers by
threading the current-style name into each view.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/ui/tablestyle.rs

@@ -67,6 +67,7 @@ fn btn_s(accent: bool) -> impl Fn(&Theme, button::Status) -> button::Style {
 pub fn view_window<'a>(
     styles: Vec<String>,
     selected: &'a str,
+    current: &'a str,
     selected_style: Option<&'a acadrust::objects::TableStyle>,
     hmargin_buf: &'a str,
     vmargin_buf: &'a str,
@@ -356,7 +357,7 @@ pub fn view_window<'a>(
         kind: crate::app::StyleKind::Table,
         styles: &styles,
         selected,
-        current: None,
+        current: Some(current),
         rename_active,
         rename_buf,
         on_new: Message::TableStyleDialogNew,