Command line: hovered history lines stay until the pointer leaves

Lines still showing when the pointer reaches the overlay history no
longer fade under it; leaving restarts their COMMANDLINEFADETIME.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/mod.rs

@@ -3059,6 +3059,8 @@ pub enum Message {
     /// User clicked a command-line option button — feed its keyword to the
     /// active command as if typed (empty keyword = Enter). (#304)
     CommandOptionPick(String),
+    /// The pointer entered (true) or left the command line's overlay history.
+    CommandHistoryHover(bool),
     ToggleLayers,
     /// Open/focus (or close) the Reference Manager palette.
     ToggleXrefManager,

src/app/update/mod.rs

@@ -2857,6 +2857,11 @@ impl OpenCADStudio {
                 self.focus_cmd_input()
             }
 
+            Message::CommandHistoryHover(hovered) => {
+                self.command_line.set_history_hover(hovered);
+                Task::none()
+            }
+
             Message::CommandHistoryToggle => {
                 self.command_line.toggle_history();
                 if !self.command_line.history_open {

src/ui/command_line.rs

@@ -194,6 +194,9 @@ pub struct CommandLine {
     /// COMMANDLINEOPACITY: how opaque the command line's panels are, in
     /// percent (20–100, default 80), so the drawing shows through.
     opacity_percent: u8,
+    /// Since when the pointer rests on the overlay history: lines still
+    /// showing then stay until it leaves, and fade from that moment.
+    hover_since: Option<Instant>,
 }
 
 impl Default for CommandLine {
@@ -221,6 +224,7 @@ impl Default for CommandLine {
             cliprompt_lines: 3,
             fade_ms: DEFAULT_COMMANDLINE_FADE_MS,
             opacity_percent: 80,
+            hover_since: None,
         }
     }
 }
@@ -527,7 +531,32 @@ impl CommandLine {
     }
 
     fn entry_visible(&self, e: &HistoryEntry) -> bool {
-        e.pinned || self.fade_ms == 0 || e.created_at.elapsed().as_secs_f32() < self.fade_secs()
+        let held = self.hover_since.is_some_and(|since| {
+            since.saturating_duration_since(e.created_at).as_secs_f32() < self.fade_secs()
+        });
+        e.pinned
+            || self.fade_ms == 0
+            || held
+            || e.created_at.elapsed().as_secs_f32() < self.fade_secs()
+    }
+
+    /// The pointer entered or left the overlay history. Leaving restarts the
+    /// fade of every line it held.
+    pub fn set_history_hover(&mut self, hovered: bool) {
+        if hovered {
+            self.hover_since.get_or_insert_with(Instant::now);
+            return;
+        }
+        let Some(since) = self.hover_since.take() else {
+            return;
+        };
+        let fade = self.fade_secs();
+        let now = Instant::now();
+        for entry in &mut self.history {
+            if since.saturating_duration_since(entry.created_at).as_secs_f32() < fade {
+                entry.created_at = now;
+            }
+        }
     }
 
     /// Height of the overlaid prompt lines currently shown above the input
@@ -1144,16 +1173,20 @@ impl CommandLine {
         let recent_history: Element<'a, Message> = if self.history_open || !has_recent_history {
             container(column![]).height(0).into()
         } else {
-            container(history_rows)
-                .style(move |theme: &Theme| container::Style {
-                    background: Some(Background::Color(
-                        theme.palette().background.base.color.scale_alpha(opacity),
-                    )),
-                    ..Default::default()
-                })
-                .width(Length::Fill)
-                .padding([2, 0])
-                .into()
+            iced::widget::mouse_area(
+                container(history_rows)
+                    .style(move |theme: &Theme| container::Style {
+                        background: Some(Background::Color(
+                            theme.palette().background.base.color.scale_alpha(opacity),
+                        )),
+                        ..Default::default()
+                    })
+                    .width(Length::Fill)
+                    .padding([2, 0]),
+            )
+            .on_enter(Message::CommandHistoryHover(true))
+            .on_exit(Message::CommandHistoryHover(false))
+            .into()
         };
         let history_divider: Element<'a, Message> = if self.history_open {
             rule::horizontal(1).into()