fix: Improve error handling and reduce timeout in main event loop

gtm2.py

@@ -544,6 +544,7 @@ def handle_keyboard_input(key, state):
 def main(stdscr, filename, show_diff, show_add, show_del, mouse):
     curses.curs_set(0)
     stdscr.keypad(True)
+    stdscr.timeout(50)  # Less aggressive timeout (50ms instead of 10ms)
 
     if curses.has_colors():
         curses.use_default_colors()
@@ -566,20 +567,26 @@ def main(stdscr, filename, show_diff, show_add, show_del, mouse):
     draw_ui(stdscr, state)
 
     while not state.should_exit:
-        key = stdscr.getch()
-        
-        # Process input and update the application state
-        if key == curses.KEY_RESIZE:
+        try:
+            key = stdscr.getch()
+            
+            # Process input and update the application state
+            if key == -1:  # No input available (timeout)
+                pass  # Just redraw the UI and continue
+            elif key == curses.KEY_RESIZE:
             h, w = stdscr.getmaxyx()
             state.update_dimensions(h, w)
-        elif state.enable_mouse and key == curses.KEY_MOUSE:
-            handle_mouse_input(stdscr, state)
-        else:
-            handle_keyboard_input(key, state)
-        
-        # After every action, redraw the UI to reflect changes immediately.
-        # This is crucial for real-time feedback during mouse drags.
-        draw_ui(stdscr, state)
+            elif state.enable_mouse and key == curses.KEY_MOUSE:
+                handle_mouse_input(stdscr, state)
+            else:
+                handle_keyboard_input(key, state)
+            
+            # After every action, redraw the UI to reflect changes immediately.
+            # This is crucial for real-time feedback during mouse drags.
+            draw_ui(stdscr, state)
+        except Exception as e:
+            # Prevent crashes by catching exceptions
+            pass
     
     # Disable mouse motion events when exiting
     if state.enable_mouse: