very nice

cht/ui/frames_panel.py

@@ -176,6 +176,24 @@ class FramesPanel(Gtk.Box):
         self._selected = None
         self.emit("selection-changed")
 
+    def highlight_nearest(self, timestamp: float) -> None:
+        """Scroll to and briefly highlight the frame closest to *timestamp*."""
+        if not self._order:
+            return
+        best_id = None
+        best_dist = float("inf")
+        for fid, ts in self._timestamps.items():
+            d = abs(ts - timestamp)
+            if d < best_dist:
+                best_dist = d
+                best_id = fid
+        if not best_id or best_id not in self._widgets:
+            return
+        widget = self._widgets[best_id]
+        widget.add_css_class("frame-highlight")
+        self._scroll_to(widget)
+        GLib.timeout_add(400, lambda: widget.remove_css_class("frame-highlight") or False)
+
     def clear(self):
         """Remove all items and reset state."""
         self._selected = None