Refactor Unicode feature (#18333)

quantum/process_keycode/process_unicode.c

@@ -15,14 +15,14 @@
  */
 
 #include "process_unicode.h"
-#include "action_util.h"
-#include "eeprom.h"
+#include "unicode.h"
+#include "quantum_keycodes.h"
 
 bool process_unicode(uint16_t keycode, keyrecord_t *record) {
-    if (keycode >= QK_UNICODE && keycode <= QK_UNICODE_MAX && record->event.pressed) {
-        unicode_input_start();
-        register_hex(keycode & 0x7FFF);
-        unicode_input_finish();
+    if (record->event.pressed) {
+        if (keycode >= QK_UNICODE && keycode <= QK_UNICODE_MAX) {
+            register_unicode(keycode & 0x7FFF);
+        }
     }
     return true;
 }