Add direct local LED feedback on button press

src/app_task.cpp

@@ -135,6 +135,19 @@ void AppTask::process_switch_event(uint8_t switch_id, bool pressed) {
             
             if (pressed) {
                 midi_transport->send_cc(channel, cc_num, value);
+                led_driver->set_led_state(
+                    pad_mapping[i].midi_note,
+                    pad_mapping[i].midi_channel,
+                    value,
+                    i
+                );
+            } else {
+                led_driver->set_led_state(
+                    pad_mapping[i].midi_note,
+                    pad_mapping[i].midi_channel,
+                    0,
+                    i
+                );
             }
             
             Serial.printf("[APP] Switch %d -> Ch%d CC%d Val%d (%s)\n",