Standardize ergo bottom row keys

Author: bcat

keyboards/eco/keymaps/bcat/README.md

@@ -8,13 +8,13 @@ on a Pro Micro (or compatible) controller.
 
 * Based on [split 3x6+3](/layouts/split_3x6_3/bcat) layout. See that page for
   detailed rationale on keymap design.
-* The alpha keys are separated by an extra two columns in the middle to provide
-  a little more hand separation, similar to a split keyboard.
+* The alpha keys are spaced around the middle two columns, providing a little
+  more hand separation, similar to a split keyboard.
 * The top three rows of the extra middle columns feature navigation keys and
   brackets/braces. I don't really use dedicated keys for these, but I had the
   keycaps, so I figured I may as well put them there.
 * I have a Left Alt and Right Super key on the bottom row just like my
-  [Lily58](/keyboards/lily58/keymaps/bcat).
+  [Altair-X](/keyboards/ai03/altair_x/keymaps/bcat).
 * The two keys in each bottom corner are unbound, as is the 2U spacebar in the
   center of the bottom row. These keys are too inconvenient to reach, and
   there's nothing really useful to bind them to anyway.

keyboards/lily58/keymaps/bcat/README.md

@@ -13,9 +13,9 @@ per side.
 * The dedicated Hyphen/Underscore and Equals/Plus keys on the number row are
   placed in the same positions as on the ErgoDox EZ. (There's no real reason for
   this; I just had to do _something_ with those keys.)
-* The extra thumb keys on the bottom row are used for a Left Alt key (for easier
-  Alt+Tab, Alt+F4, etc.) and a dedicated Super key.
-* The extra thumb keys below the controllers are bound to browser zoom keys.
+* The extra bottom row keys are mapped to Alt and Super for convenience, just as
+  they are on my [Altair-X](/keyboards/ai03/altair_x/bcat).
+* The additional keys below the controllers are bound to browser zoom keys.
 </details>
 
 | Default layer ([KLE](http://www.keyboard-layout-editor.com/#/gists/e0eb3af65961e9fd612dcff3ddd88e4f)) |

keyboards/yanghu/unicorne/keymaps/bcat/README.md

@@ -1,17 +1,18 @@
 # bcat's Unicorne layout
 
 The [Unicorne](https://github.com/yanghu/unicorne) keyboard is an un-split Crkbd
-with slightly altered columbar stagger and two extra thumb keys (including
+with slightly altered columnar stagger and two extra thumb keys (including
 rotary encoder compatibility).
 
 <details>
 <summary>Layout notes</summary>
 
 * Based on [split 3x6+3](/layouts/split_3x6_3/bcat) layout. See that page for
   detailed rationale on keymap design.
-* I built my Unicorne with rotary encoders: The left scrolls vertically and the
-  right adjusts volume. These were a fun gimmick at first, but in retrospect,
-  I'd prefer to use that as Alt and Super keys instead.
+* I built my Unicorne without encoders, as I've always found them a fun gimmick,
+  but not something I regularly use.
+* Instead, the extra bottom row keys are mapped to Alt and Super for
+  convenience, just as they are on my [Altair-X](/keyboards/ai03/altair_x/bcat).
 * Since the Unicorne has a speaker, I added bindings on the Adjust layer to
   activate and configure QMK's [music
   mode](https://docs.qmk.fm/features/audio#music-mode).

keyboards/yanghu/unicorne/keymaps/bcat/keymap.c

@@ -15,7 +15,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
         KC_TAB,   KC_Q,     KC_W,     KC_E,     KC_R,     KC_T,                         KC_Y,     KC_U,     KC_I,     KC_O,     KC_P,     KC_BSPC,
         KC_ESC,   KC_A,     KC_S,     KC_D,     KC_F,     KC_G,                         KC_H,     KC_J,     KC_K,     KC_L,     KC_SCLN,  KC_QUOT,
         KC_LSFT,  KC_Z,     KC_X,     KC_C,     KC_V,     KC_B,                         KC_N,     KC_M,     KC_COMM,  KC_DOT,   KC_SLSH,  KC_RSFT,
-                                      KC_MPLY,  KC_LCTL,  TL_LOWR,  KC_SPC,   KC_ENT,   TL_UPPR,  KC_RALT,  KC_MUTE
+                                      KC_LALT,  KC_LCTL,  TL_LOWR,  KC_SPC,   KC_ENT,   TL_UPPR,  KC_RALT,  KC_RGUI
     ),
     [LAYER_LOWER] = LAYOUT(
         CC_ALTT,  KC_EXLM,  KC_AT,    KC_HASH,  KC_DLR,   KC_PERC,                      KC_CIRC,  KC_AMPR,  KC_ASTR,  KC_LPRN,  KC_RPRN,  _______,
@@ -38,21 +38,6 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     // clang-format on
 };
 
-bool encoder_update_user(uint8_t index, bool clockwise) {
-    switch (index) {
-        case 0:
-            // Left encoder (scrolling):
-            tap_code(clockwise ? KC_PGDN : KC_PGUP);
-            return false;
-        case 1:
-            // Right encoder (volume):
-            tap_code(clockwise ? KC_VOLU : KC_VOLD);
-            return false;
-        default:
-            return true;
-    }
-}
-
 #if defined(OLED_ENABLE)
 oled_rotation_t oled_init_user(oled_rotation_t rotation) {
     return OLED_ROTATION_270;