add todo comment

apps/app/src/styles/theme/_hsl-reboot-bootstrap-theme-colors.scss

@@ -21,18 +21,20 @@ $hsl-colors: (
   }
 }
 
-@each $color, $value in $hsl-colors {
-  .text-#{$color} {
-    color: $value !important;
-    @if $emphasized-link-hover-darken-percentage != 0 {
-      a {
-        @include hover-focus() {
-          color: hsl.darken($value, $emphasized-link-hover-darken-percentage) !important;
-        }
-      }
-    }
-  }
-}
+// TODO: hover-focus() dropped in bootstrap v5
+// https://redmine.weseek.co.jp/issues/128307
+// @each $color, $value in $hsl-colors {
+//   .text-#{$color} {
+//     color: $value !important;
+//     @if $emphasized-link-hover-darken-percentage != 0 {
+//       a {
+//         @include hover-focus() {
+//           color: hsl.darken($value, $emphasized-link-hover-darken-percentage) !important;
+//         }
+//       }
+//     }
+//   }
+// }
 
 @each $color, $value in $hsl-colors {
   .btn-#{$color} {

apps/app/src/styles/theme/_reboot-bootstrap-theme-colors.scss

@@ -72,24 +72,26 @@
   }
 }
 
-@each $color, $value in $theme-colors {
-  .alert-#{$color} {
-    @include alert-variant(
-      theme-color-level($color, $alert-bg-level),
-      theme-color-level($color, $alert-border-level),
-      theme-color-level($color, $alert-color-level)
-    );
-  }
-  // Alert link
-  :root, .wiki {
-    .alert.alert-#{$color} {
-      a,
-      a:hover {
-        color: theme-color-level($color, $alert-color-level - 2);
-      }
-    }
-  }
-}
+// TODO: activate (https://redmine.weseek.co.jp/issues/128307)
+// theme-color-level() dropped in bootstrap v5
+// @each $color, $value in $theme-colors {
+//   .alert-#{$color} {
+//     @include alert-variant(
+//       theme-color-level($color, $alert-bg-level),
+//       theme-color-level($color, $alert-border-level),
+//       theme-color-level($color, $alert-color-level)
+//     );
+//   }
+//   // Alert link
+//   :root, .wiki {
+//     .alert.alert-#{$color} {
+//       a,
+//       a:hover {
+//         color: theme-color-level($color, $alert-color-level - 2);
+//       }
+//     }
+//   }
+// }
 
 @each $color, $value in $theme-colors {
   .bg-#{$color} {

apps/app/src/styles/theme/apply-colors.scss

@@ -66,6 +66,7 @@ code:not([class^='language-']) {
 //
 
 // TODO: activate (https://redmine.weseek.co.jp/issues/128307)
+// theme-color-level() dropped in bootstrap v5
 // Alert link
 // @each $color, $value in $theme-colors {
 //   .alert.alert-#{$color} {
@@ -90,6 +91,7 @@ code:not([class^='language-']) {
 }
 
 // TODO: activate (https://redmine.weseek.co.jp/issues/128307)
+// form-control-focus() dropped in bootstrap v5
 // Form
 // .form-control {
 //   @include form-control-focus();

apps/app/src/styles/theme/mixins/_hsl-badge.scss

@@ -7,10 +7,12 @@
   background-color: $bg;
 
   @at-root a#{&} {
-    @include bs.hover-focus() {
-      color: hsl.contrast($bg);
-      background-color: hsl.darken($bg, 10%);
-    }
+    // TODO: hover-focus() dropped in bootstrap v5
+    // https://redmine.weseek.co.jp/issues/128307
+    // @include bs.hover-focus() {
+    //   color: hsl.contrast($bg);
+    //   background-color: hsl.darken($bg, 10%);
+    // }
 
     &:focus,
     &.focus {