Map buttons to custom CC values with reverse-map feedback

include/app_task.h

@@ -28,6 +28,7 @@ private:
     static const uint8_t NUM_PADS = 10;
     PadMapping pad_mapping[NUM_PADS];
     bool last_switch_state[NUM_PADS];
+    uint8_t cc_map[NUM_PADS];
     
     // SysEx reassembly buffer
     static const uint8_t SYSEX_MAX_LEN = 64;