tweaks

cht/app.py

@@ -1,5 +1,6 @@
 import logging
 import os
+import signal
 import sys
 import threading
 import gi
@@ -19,13 +20,30 @@ class ChtApp(Adw.Application):
             application_id=APP_ID,
             flags=Gio.ApplicationFlags.DEFAULT_FLAGS,
         )
+        # Let GLib handle SIGINT/SIGTERM so Ctrl+C triggers graceful shutdown
+        GLib.unix_signal_add(GLib.PRIORITY_HIGH, signal.SIGINT, self._on_signal)
+        GLib.unix_signal_add(GLib.PRIORITY_HIGH, signal.SIGTERM, self._on_signal)
+
+    def _on_signal(self):
+        log = logging.getLogger("cht")
+        log.info("Signal received — shutting down gracefully")
+        self.quit()
+        return GLib.SOURCE_REMOVE
+
+    def do_shutdown(self):
+        # Ensure all windows tear down before the process exits
+        for win in self.get_windows():
+            if hasattr(win, "teardown"):
+                win.teardown()
+        Adw.Application.do_shutdown(self)
 
     def do_activate(self):
         win = self.props.active_window
         if not win:
             css = Gtk.CssProvider()
             css.load_from_string(
-                ".frame-selected { border: 3px solid @accent_color; border-radius: 6px; }"
+                ".frame-selected { border: 3px solid @accent_color; border-radius: 6px; }\n"
+                "row.frame-selected { background: alpha(@accent_color, 0.25); border: none; border-radius: 0; }"
             )
             Gtk.StyleContext.add_provider_for_display(
                 Gdk.Display.get_default(),