feat(commandline): allow history to never fade when fade time is 0

src/app/view/mod.rs

@@ -2534,11 +2534,10 @@ impl OpenCADStudio {
             Subscription::none()
         };
         // While the command-line overlay is still displaying any
-        // recently-pushed history entry, re-render every frame so the
+        // recently-pushed history entry that is expiring, re-render every frame so the
         // entry disappears at the moment its visible window expires.
-        // The subscription auto-stops once no entry is fresh enough
-        // (typically within a few seconds of the last command).
-        let history_tick = if self.command_line.has_visible_history() {
+        // The subscription auto-stops once no entry is expiring.
+        let history_tick = if self.command_line.has_expiring_history() {
             window::frames().map(Message::Tick)
         } else {
             Subscription::none()