[User] Update personal userspace and keymaps, add reactive underglow (#6410)

* Update MODERN_DOLCH_RED color

* Remove unused RAL_LAL tap dance

* Disable Space Cadet on all boards

* Rework SEND_STRING_CLEAN into CLEAN_MODS, fix DST_P_R/DST_N_A

* Disable unnecessary underglow animations

* Rearrange feature flags in rules.mk files

* Change custom colors from structs to defines

* Add some explicit initializers

* Add MODERN_DOLCH_CYAN color

* Add IS_LAYER_ON_STATE()/IS_LAYER_OFF_STATE() macros

* Add led_set_keymap() template function

* Change underglow color based on Caps/Fn state

* Preserve val when changing underglow colors

* Only trigger Fn light for Fn layer

* Refactor fn_light() and caps_light() slightly

* Add comments to fn_light() and caps_light()

1 files changed, 41 insertions, 1 deletions

diff --git a/keyboards/kbdfans/kbd6x/keymaps/konstantin/keymap.c b/keyboards/kbdfans/kbd6x/keymaps/konstantin/keymap.c
index b348b0b7bf..c5c8c09636 100644
--- a/keyboards/kbdfans/kbd6x/keymaps/konstantin/keymap.c
+++ b/keyboards/kbdfans/kbd6x/keymaps/konstantin/keymap.c
@@ -10,7 +10,7 @@ enum layers_keymap {
 };
 
 void eeconfig_init_keymap(void) {
-    rgblight_sethsv(MODERN_DOLCH_RED.h, MODERN_DOLCH_RED.s, MODERN_DOLCH_RED.v);
+    rgblight_sethsv(MODERN_DOLCH_RED);
     rgblight_mode(RGBLIGHT_MODE_RAINBOW_SWIRL);
 }
 
@@ -31,6 +31,46 @@ bool process_record_keymap(uint16_t keycode, keyrecord_t *record) {
     }
 }
 
+static bool skip_caps = false;
+
+static void fn_light(uint32_t state) {
+    if (IS_LAYER_ON_STATE(state, L_FN)) {
+        rgblight_mode_noeeprom(RGBLIGHT_MODE_STATIC_LIGHT);
+        rgblight_sethsv_noeeprom(modern_dolch_red.h, modern_dolch_red.s, rgblight_get_val());
+        skip_caps = true;
+    } else {
+        rgblight_config_t saved = { .raw = eeconfig_read_rgblight() };
+        rgblight_sethsv_noeeprom(saved.hue, saved.sat, saved.val);
+        rgblight_mode_noeeprom(saved.mode);
+    }
+    // caps_light will be called automatically after this
+}
+
+static void caps_light(uint8_t usb_led) {
+    if (skip_caps) {
+        skip_caps = false;
+        return;  // Skip calls triggered by the Fn layer turning on
+    }
+    if (IS_LED_ON(usb_led, USB_LED_CAPS_LOCK)) {
+        rgblight_mode_noeeprom(RGBLIGHT_MODE_STATIC_LIGHT);
+        rgblight_sethsv_noeeprom(modern_dolch_cyan.h, modern_dolch_cyan.s, rgblight_get_val());
+    } else {
+        fn_light(layer_state);  // Caps is off, check if Fn light should be on
+    }
+}
+
+uint32_t layer_state_set_keymap(uint32_t state) {
+    static uint32_t prev_state = L_BASE;
+    if (IS_LAYER_ON_STATE(state, L_FN) != IS_LAYER_ON_STATE(prev_state, L_FN)) {
+        fn_light(state);  // Fn state changed since last time
+    }
+    return prev_state = state;
+}
+
+void led_set_keymap(uint8_t usb_led) {
+    caps_light(usb_led);
+}
+
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     /* Base layer
      * ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐