Update personal userspace and keymaps + improve custom functionality (#5289)

* Change how desktop commands work

* Add DST_MOD_MASK as a config option

* DST_RMV → DST_REM

* Add melody96:konstantin keymap

* Update custom SEND_STRING

* Move feature flags from userspace into keyboard rules

* Use "Vo-", "Vo+" instead of "VoD", "VoU" in keymap comments

* Add RGB controls and numpad Unicode to Melody96 keymap

* Add RGB_SET keycode to Melody96 and RGB files to userspace

* Generate UNICODE and UNICODEMAP constants using macros

* Avoid collisions with X_* send string constants

* Use two spaces before inline comments

* Add _keymap versions of other custom Quantum functions

Not added: eeconfig_update_keymap, eeconfig_read_keymap

* Switch to UNICODEMAP in keyboard rules

* Make toggle_numpad a nested function in process_record_user

* Set Melody96 underglow color to Godspeed blue on EEPROM reset

* Remove most _keymap and _user definitions in userspace

Some keyboards misuse _user functions by defining them in the base files
instead of the corresponding _kb functions (especially led_set_user and
matrix_init_user). Until this is fixed (#5148), I've removed definitions
in my userspace that could cause linking collisions.

* Update GODSPEED_BLUE values and RGB mode keys

* Add GODSPEED_YELLOW color

* Set preferred intervals for rgblight effects

* Update tap dance function names

* Replace td_lshift_fn with generic td_mod_layer, add TD_RCTL_FN

Move TD_FN_RCTL after TD_RCTL_FN

* Replace td_fn_rctrl with generic td_layer_mod

* Add blank lines, prefer explicit initialization

* ACTION_TAP_DANCE_DOUBLE_MODS → ACTION_TAP_DANCE_DOUBLE_MOD

* Update Godspeed colors

* Add media controls to Melody96 keymap

* Add SysRq, Break combos and other keys to Melody96 keymap

9 files changed, 236 insertions, 90 deletions

diff --git a/users/konstantin/konstantin.c b/users/konstantin/konstantin.c
index 47596279c3..753742fa78 100644
--- a/users/konstantin/konstantin.c
+++ b/users/konstantin/konstantin.c
@@ -1,15 +1,25 @@
 #include "konstantin.h"
 
-#ifdef LAYER_NUMPAD
-static void toggle_numpad(void) {
-  layer_invert(L_NUMPAD);
-  bool numpad_on = IS_LAYER_ON(L_NUMPAD);
-  bool num_lock_on = IS_HOST_LED_ON(USB_LED_NUM_LOCK);
-  if (num_lock_on != numpad_on) {
-    tap_code(KC_NLCK); // Toggle Num Lock to match layer state
-  }
+__attribute__((weak))
+void keyboard_pre_init_keymap(void) {}
+
+void keyboard_pre_init_user(void) {
+  keyboard_pre_init_keymap();
+}
+
+__attribute__((weak))
+void eeconfig_init_keymap(void) {}
+
+void eeconfig_init_user(void) {
+  eeconfig_init_keymap();
+}
+
+__attribute__((weak))
+void keyboard_post_init_keymap(void) {}
+
+void keyboard_post_init_user(void) {
+  keyboard_post_init_keymap();
 }
-#endif
 
 __attribute__((weak))
 bool process_record_keymap(uint16_t keycode, keyrecord_t *record) {
@@ -21,6 +31,16 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
     return false;
   }
 
+#ifdef LAYER_NUMPAD
+  void toggle_numpad(void) {
+    layer_invert(L_NUMPAD);
+    bool numpad = IS_LAYER_ON(L_NUMPAD), num_lock = IS_HOST_LED_ON(USB_LED_NUM_LOCK);
+    if (num_lock != numpad) {
+      tap_code(KC_NLCK);  // Toggle Num Lock to match layer state
+    }
+  }
+#endif
+
   switch (keycode) {
   case CLEAR:
     if (record->event.pressed) {
@@ -28,12 +48,24 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
     }
     return false;
 
+  case DST_P_R:
+    (record->event.pressed ? register_code16 : unregister_code16)(
+      (get_mods() & DST_MOD_MASK) ? DST_REM : DST_PRV
+    );
+    return false;
+
+  case DST_N_A:
+    (record->event.pressed ? register_code16 : unregister_code16)(
+      (get_mods() & DST_MOD_MASK) ? DST_ADD : DST_NXT
+    );
+    return false;
+
 #ifdef LAYER_FN
-  static bool fn_lock;
+    static bool fn_lock;
 
   case FN_FNLK:
     if (record->event.pressed && record->tap.count == TAPPING_TOGGLE) {
-      fn_lock = !IS_LAYER_ON(L_FN); // Fn layer will be toggled after this
+      fn_lock = !IS_LAYER_ON(L_FN);  // Fn layer will be toggled after this
     }
     return true;
 #endif
diff --git a/users/konstantin/konstantin.h b/users/konstantin/konstantin.h
index f67f9f1b7e..0639b93a6d 100644
--- a/users/konstantin/konstantin.h
+++ b/users/konstantin/konstantin.h
@@ -1,10 +1,13 @@
 #pragma once
 
 #include "quantum.h"
+#if defined(RGBLIGHT_ENABLE) || defined(RGBMATRIX_ENABLE)
+  #include "rgb.h"
+#endif
 #ifdef TAP_DANCE_ENABLE
   #include "tap_dance.h"
 #endif
-#ifdef UNICODE_ENABLE
+#if defined(UNICODE_ENABLE) || defined(UNICODEMAP_ENABLE)
   #include "unicode.h"
 #endif
 
@@ -14,6 +17,10 @@
   #define FN_FNLK TT(L_FN)
 #endif
 
+#define KC_SYSR LALT(KC_PSCR)
+#undef  KC_BRK
+#define KC_BRK  LCTL(KC_PAUS)
+
 #define MV_UP   LCTL(KC_UP)
 #define MV_DOWN LCTL(KC_DOWN)
 #define MV_LEFT LCTL(KC_LEFT)
@@ -23,20 +30,30 @@
 #define PRV_TAB LCTL(KC_PGUP)
 #define NXT_TAB LCTL(KC_PGDN)
 
+#define DST_ADD LCTL(LGUI(KC_D))
+#define DST_REM LCTL(LGUI(KC_F4))
+#define DST_PRV LCTL(LGUI(KC_LEFT))
+#define DST_NXT LCTL(LGUI(KC_RGHT))
+#ifndef DST_MOD_MASK
+  #define DST_MOD_MASK MOD_MASK_CTRL
+#endif
+
 #define LCT_CPS LCTL_T(KC_CAPS)
 
 #ifdef SEND_STRING_CLEAN
   #undef  SEND_STRING
-  #define SEND_STRING(...) {            \
-      uint8_t ss_mods = get_mods();     \
-      clear_mods();                     \
-      send_string_P(PSTR(__VA_ARGS__)); \
-      set_mods(ss_mods);                \
+  #define SEND_STRING(string) {     \
+      uint8_t ss_mods = get_mods(); \
+      clear_mods();                 \
+      send_string_P(PSTR(string));  \
+      set_mods(ss_mods);            \
     }
 #endif
 
 enum keycodes_user {
   CLEAR = SAFE_RANGE,
+  DST_P_R,
+  DST_N_A,
 #ifdef LAYER_NUMPAD
   NUMPAD,
 #endif
@@ -56,5 +73,9 @@ enum layers_user {
   L_RANGE_KEYMAP,
 };
 
+void keyboard_pre_init_keymap(void);
+void eeconfig_init_keymap(void);
+void keyboard_post_init_keymap(void);
+
 bool process_record_keymap(uint16_t keycode, keyrecord_t *record);
 uint32_t layer_state_set_keymap(uint32_t state);
diff --git a/users/konstantin/rgb.c b/users/konstantin/rgb.c
new file mode 100644
index 0000000000..0f0c73c49e
--- /dev/null
+++ b/users/konstantin/rgb.c
@@ -0,0 +1,24 @@
+#include "rgb.h"
+
+#ifdef RGBLIGHT_EFFECT_BREATHING
+const uint8_t RGBLED_BREATHING_INTERVALS[] PROGMEM = {20, 30, 5, 10};
+#endif
+
+#ifdef RGBLIGHT_EFFECT_RAINBOW_MOOD
+const uint8_t RGBLED_RAINBOW_MOOD_INTERVALS[] PROGMEM = {20, 50, 100};
+#endif
+
+#ifdef RGBLIGHT_EFFECT_RAINBOW_SWIRL
+const uint8_t RGBLED_RAINBOW_SWIRL_INTERVALS[] PROGMEM = {20, 50, 100};
+#endif
+
+#ifdef RGBLIGHT_EFFECT_SNAKE
+const uint8_t RGBLED_SNAKE_INTERVALS[] PROGMEM = {20, 50, 100};
+#endif
+
+#ifdef RGBLIGHT_EFFECT_KNIGHT
+const uint8_t RGBLED_KNIGHT_INTERVALS[] PROGMEM = {20, 50, 100};
+#endif
+
+const hsv_t GODSPEED_BLUE   = { .h = 280, .s = 68,  .v = RGBLIGHT_LIMIT_VAL };
+const hsv_t GODSPEED_YELLOW = { .h = 38,  .s = 153, .v = RGBLIGHT_LIMIT_VAL };
diff --git a/users/konstantin/rgb.h b/users/konstantin/rgb.h
new file mode 100644
index 0000000000..53b5821b0e
--- /dev/null
+++ b/users/konstantin/rgb.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include "quantum.h"
+
+typedef struct {
+  uint16_t h;  // 0–360
+  uint8_t  s;  // 0–255
+  uint8_t  v;  // 0–255
+} hsv_t;
+
+typedef struct {
+  uint8_t r;  // 0–255
+  uint8_t g;  // 0–255
+  uint8_t b;  // 0–255
+} rgb_t;
+
+extern const hsv_t GODSPEED_BLUE;
+extern const hsv_t GODSPEED_YELLOW;
diff --git a/users/konstantin/rules.mk b/users/konstantin/rules.mk
index d2522b9523..6bda030fb0 100644
--- a/users/konstantin/rules.mk
+++ b/users/konstantin/rules.mk
@@ -1,15 +1,12 @@
-BOOTMAGIC_ENABLE   = no
-COMMAND_ENABLE     = yes
-CONSOLE_ENABLE     = yes
-EXTRAKEY_ENABLE    = yes
-MOUSEKEY_ENABLE    = yes
-NKRO_ENABLE        = yes
-TAP_DANCE_ENABLE   = yes
-UNICODE_ENABLE     = yes
-
 SRC += konstantin.c
+ifneq (,$(filter yes,$(RGBLIGHT_ENABLE) $(RGB_MATRIX_ENABLE)))  # if either is yes
+  SRC += rgb.c
+endif
 ifeq ($(strip $(TAP_DANCE_ENABLE)), yes)
   SRC += tap_dance.c
 endif
+ifneq (,$(filter yes,$(UNICODE_ENABLE) $(UNICODEMAP_ENABLE)))  # if either is yes
+  SRC += unicode.c
+endif
 
 EXTRAFLAGS += -flto
diff --git a/users/konstantin/tap_dance.c b/users/konstantin/tap_dance.c
index b13f33c024..0b405939b3 100644
--- a/users/konstantin/tap_dance.c
+++ b/users/konstantin/tap_dance.c
@@ -1,93 +1,117 @@
 #include "tap_dance.h"
 #include "konstantin.h"
 
-#define ACTION_TAP_DANCE_DOUBLE_MODS(mod1, mod2) { \
-    .fn = { td_double_mods_each, NULL, td_double_mods_reset }, \
-    .user_data = &(qk_tap_dance_pair_t){ mod1, mod2 }, \
+#define ACTION_TAP_DANCE_DOUBLE_MOD(mod1, mod2) {                   \
+    .fn        = { td_double_mod_each, NULL, td_double_mod_reset }, \
+    .user_data = &(qk_tap_dance_pair_t){ mod1, mod2 },              \
   }
 
-void td_double_mods_each(qk_tap_dance_state_t *state, void *user_data) {
-  qk_tap_dance_pair_t *mods = (qk_tap_dance_pair_t *)user_data;
+void td_double_mod_each(qk_tap_dance_state_t *state, void *user_data) {
+  qk_tap_dance_pair_t *data = (qk_tap_dance_pair_t *)user_data;
+
   // Single tap → mod1, double tap → mod2, triple tap etc. → mod1+mod2
   if (state->count == 1 || state->count == 3) {
-    register_code(mods->kc1);
+    register_code(data->kc1);
   } else if (state->count == 2) {
-    unregister_code(mods->kc1);
-    register_code(mods->kc2);
+    unregister_code(data->kc1);
+    register_code(data->kc2);
   }
-  // Prevent tap dance from sending kc1 and kc2 as weak mods
-  state->weak_mods &= ~(MOD_BIT(mods->kc1) | MOD_BIT(mods->kc2));
+  // Prevent tap dance from sending the mods as weak mods
+  state->weak_mods &= ~(MOD_BIT(data->kc1) | MOD_BIT(data->kc2));
 }
 
-void td_double_mods_reset(qk_tap_dance_state_t *state, void *user_data) {
-  qk_tap_dance_pair_t *mods = (qk_tap_dance_pair_t *)user_data;
+void td_double_mod_reset(qk_tap_dance_state_t *state, void *user_data) {
+  qk_tap_dance_pair_t *data = (qk_tap_dance_pair_t *)user_data;
+
   if (state->count == 1 || state->count >= 3) {
-    unregister_code(mods->kc1);
+    unregister_code(data->kc1);
   }
   if (state->count >= 2) {
-    unregister_code(mods->kc2);
+    unregister_code(data->kc2);
   }
 }
 
-struct {
-  bool fn_on; // Layer state when tap dance started
-  bool started;
-} td_fn_rctrl_data;
-
-void td_fn_rctrl_each(qk_tap_dance_state_t *state, void *user_data) {
-  if (!td_fn_rctrl_data.started) {
-    td_fn_rctrl_data.fn_on = IS_LAYER_ON(L_FN);
-    td_fn_rctrl_data.started = true;
+#define ACTION_TAP_DANCE_MOD_LAYER(mod, layer) {                  \
+    .fn        = { td_mod_layer_each, NULL, td_mod_layer_reset }, \
+    .user_data = &(qk_tap_dance_dual_role_t){ mod, layer },       \
   }
-  // Single tap → Fn, double tap → RCtrl, triple tap etc. → Fn+RCtrl
+
+void td_mod_layer_each(qk_tap_dance_state_t *state, void *user_data) {
+  qk_tap_dance_dual_role_t *data = (qk_tap_dance_dual_role_t *)user_data;
+
+  // Single tap → mod, double tap → layer, triple tap etc. → mod+layer
   if (state->count == 1 || state->count == 3) {
-    layer_on(L_FN);
+    register_code(data->kc);
   } else if (state->count == 2) {
-    if (!td_fn_rctrl_data.fn_on) {
-      layer_off(L_FN);
-    }
-    register_code(KC_RCTL);
+    unregister_code(data->kc);
+    // Prevent tap dance from sending the mod as a weak mod
+    state->weak_mods &= ~MOD_BIT(data->kc);
+    layer_on(data->layer);
   }
 }
 
-void td_fn_rctrl_reset(qk_tap_dance_state_t *state, void *user_data) {
-  if ((state->count == 1 || state->count >= 3) && !td_fn_rctrl_data.fn_on) {
-    layer_off(L_FN);
+void td_mod_layer_reset(qk_tap_dance_state_t *state, void *user_data) {
+  qk_tap_dance_dual_role_t *data = (qk_tap_dance_dual_role_t *)user_data;
+
+  if (state->count == 1 || state->count >= 3) {
+    unregister_code(data->kc);
   }
   if (state->count >= 2) {
-    unregister_code(KC_RCTL);
+    layer_off(data->layer);
   }
-  td_fn_rctrl_data.started = false;
 }
 
-void td_lsft_fn_each(qk_tap_dance_state_t *state, void *user_data) {
-  // Single tap → LShift, double tap → Fn, triple tap etc. → Fn+LShift
+#define ACTION_TAP_DANCE_LAYER_MOD(layer, mod) {                  \
+    .fn        = { td_layer_mod_each, NULL, td_layer_mod_reset }, \
+    .user_data = &(qk_tap_dance_layer_mod_t){ layer, mod, 0, 0 }, \
+  }
+
+typedef struct {
+  uint8_t  layer;
+  uint16_t kc;
+  bool     layer_on;  // Layer state when tap dance started
+  bool     started;
+} qk_tap_dance_layer_mod_t;
+
+void td_layer_mod_each(qk_tap_dance_state_t *state, void *user_data) {
+  qk_tap_dance_layer_mod_t *data = (qk_tap_dance_layer_mod_t *)user_data;
+  if (!data->started) {
+    data->layer_on = IS_LAYER_ON(data->layer);
+    data->started = true;
+  }
+
+  // Single tap → layer, double tap → mod, triple tap etc. → layer+mod
   if (state->count == 1 || state->count == 3) {
-    register_code(KC_LSFT);
+    layer_on(data->layer);
   } else if (state->count == 2) {
-    unregister_code(KC_LSFT);
-    // Prevent tap dance from sending LShift as a weak mod
-    state->weak_mods &= ~MOD_BIT(KC_LSFT);
-    layer_on(L_FN);
+    if (!data->layer_on) {
+      layer_off(data->layer);
+    }
+    register_code(data->kc);
   }
 }
 
-void td_lsft_fn_reset(qk_tap_dance_state_t *state, void *user_data) {
-  if (state->count == 1 || state->count >= 3) {
-    unregister_code(KC_LSFT);
+void td_layer_mod_reset(qk_tap_dance_state_t *state, void *user_data) {
+  qk_tap_dance_layer_mod_t *data = (qk_tap_dance_layer_mod_t *)user_data;
+
+  if ((state->count == 1 || state->count >= 3) && !data->layer_on) {
+    layer_off(data->layer);
   }
   if (state->count >= 2) {
-    layer_off(L_FN);
+    unregister_code(data->kc);
   }
+
+  data->started = false;
 }
 
 qk_tap_dance_action_t tap_dance_actions[] = {
-  [TD_DESKTOP] = ACTION_TAP_DANCE_DOUBLE(LCTL(LGUI(KC_D)), LCTL(LGUI(KC_F4))), // Add/close virtual desktop
+  [TD_DST_A_R] = ACTION_TAP_DANCE_DOUBLE(DST_ADD, DST_REM),
 
-  [TD_RAL_LAL] = ACTION_TAP_DANCE_DOUBLE_MODS(KC_RALT, KC_LALT),
-  [TD_RAL_RGU] = ACTION_TAP_DANCE_DOUBLE_MODS(KC_RALT, KC_RGUI),
-  [TD_RCT_RSF] = ACTION_TAP_DANCE_DOUBLE_MODS(KC_RCTL, KC_RSFT),
+  [TD_RAL_LAL] = ACTION_TAP_DANCE_DOUBLE_MOD(KC_RALT, KC_LALT),
+  [TD_RAL_RGU] = ACTION_TAP_DANCE_DOUBLE_MOD(KC_RALT, KC_RGUI),
+  [TD_RCT_RSF] = ACTION_TAP_DANCE_DOUBLE_MOD(KC_RCTL, KC_RSFT),
 
-  [TD_FN_RCTL] = ACTION_TAP_DANCE_FN_ADVANCED(td_fn_rctrl_each, NULL, td_fn_rctrl_reset),
-  [TD_LSFT_FN] = ACTION_TAP_DANCE_FN_ADVANCED(td_lsft_fn_each, NULL, td_lsft_fn_reset),
+  [TD_LSFT_FN] = ACTION_TAP_DANCE_MOD_LAYER(KC_LSFT, L_FN),
+  [TD_RCTL_FN] = ACTION_TAP_DANCE_MOD_LAYER(KC_RCTL, L_FN),
+  [TD_FN_RCTL] = ACTION_TAP_DANCE_LAYER_MOD(L_FN, KC_RCTL),
 };
diff --git a/users/konstantin/tap_dance.h b/users/konstantin/tap_dance.h
index 922a635141..ad7c04cb7f 100644
--- a/users/konstantin/tap_dance.h
+++ b/users/konstantin/tap_dance.h
@@ -2,24 +2,24 @@
 
 #include "quantum.h"
 
-#define DESKTOP TD(TD_DESKTOP)
-#define DSKTP_L LCTL(LGUI(KC_LEFT))
-#define DSKTP_R LCTL(LGUI(KC_RGHT))
+#define DST_A_R TD(TD_DST_A_R)
 
 #define RAL_LAL TD(TD_RAL_LAL)
 #define RAL_RGU TD(TD_RAL_RGU)
 #define RCT_RSF TD(TD_RCT_RSF)
 
-#define FN_RCTL TD(TD_FN_RCTL)
 #define LSFT_FN TD(TD_LSFT_FN)
+#define RCTL_FN TD(TD_RCTL_FN)
+#define FN_RCTL TD(TD_FN_RCTL)
 
 enum tap_dance {
-  TD_DESKTOP,
+  TD_DST_A_R,
 
   TD_RAL_LAL,
   TD_RAL_RGU,
   TD_RCT_RSF,
 
-  TD_FN_RCTL,
   TD_LSFT_FN,
+  TD_RCTL_FN,
+  TD_FN_RCTL,
 };
diff --git a/users/konstantin/unicode.c b/users/konstantin/unicode.c
new file mode 100644
index 0000000000..144c0aaf75
--- /dev/null
+++ b/users/konstantin/unicode.c
@@ -0,0 +1,7 @@
+#include "unicode.h"
+
+#ifdef UNICODEMAP_ENABLE
+const uint32_t PROGMEM unicode_map[] = {
+  FOREACH_UNICODE(UCM_ENTRY)
+};
+#endif
diff --git a/users/konstantin/unicode.h b/users/konstantin/unicode.h
index 09af7e1c7f..c8eddabb71 100644
--- a/users/konstantin/unicode.h
+++ b/users/konstantin/unicode.h
@@ -2,10 +2,33 @@
 
 #include "quantum.h"
 
-#define COMMA   UC(0x002C)
-#define L_PAREN UC(0x0028)
-#define R_PAREN UC(0x0029)
-#define EQUALS  UC(0x003D)
-#define TIMES   UC(0x00D7)
-#define DIVIDE  UC(0x00F7)
-#define MINUS   UC(0x2212)
+#define FOREACH_UNICODE(M) \
+  M(COMMA,   0x002C)       \
+  M(L_PAREN, 0x0028)       \
+  M(R_PAREN, 0x0029)       \
+  M(EQUALS,  0x003D)       \
+  M(TIMES,   0x00D7)       \
+  M(DIVIDE,  0x00F7)       \
+  M(MINUS,   0x2212)
+
+#define UC_KEYCODE(name, code)  name = UC(code),
+
+#define UCM_NAME(name, code)    UCM_ ## name,
+#define UCM_ENTRY(name, code)   [UCM_ ## name] = code,
+#define UCM_KEYCODE(name, code) name = X(UCM_ ## name),
+
+#if defined(UNICODE_ENABLE)
+enum unicode_keycodes {
+  FOREACH_UNICODE(UC_KEYCODE)
+};
+#elif defined(UNICODEMAP_ENABLE)
+enum unicode_names {
+  FOREACH_UNICODE(UCM_NAME)
+};
+
+extern const uint32_t PROGMEM unicode_map[];
+
+enum unicode_keycodes {
+  FOREACH_UNICODE(UCM_KEYCODE)
+};
+#endif