feat: Dark Mode (#7471)

app/javascript/dashboard/assets/scss/widgets/_conv-header.scss

@@ -1,66 +1 @@
-$resolve-button-width: 8.25rem;
-
-// Conversation header - Light BG
-.conv-header {
-  @include background-white;
-  @include flex;
-  @include flex-align($x: justify, $y: middle);
-  @include border-normal-bottom;
-  padding: var(--space-small) var(--space-normal);
-
-  .multiselect-box {
-    @include flex;
-    @include flex-align($x: justify, $y: middle);
-    border: 1px solid var(--color-border);
-    border-radius: var(--space-smaller);
-    margin-right: var(--space-small);
-    width: 13.5rem;
-
-    .icon {
-      color: $medium-gray;
-      font-size: $font-size-default;
-      line-height: 2.375rem;
-      padding-left: $space-slab;
-      padding-right: $space-smaller;
-    }
-
-    .multiselect {
-      border-radius: var(--border-radius-small);
-      margin: 0;
-      min-width: 0;
-
-      .multiselect__tags {
-        border-color: transparent;
-      }
-    }
-  }
-
-  // User thumbnail and text
-  .user {
-    @include flex;
-    @include flex-align($x: center, $y: middle);
-    margin-right: var(--space-normal);
-    min-width: 0;
-
-    .user--profile__meta {
-      align-items: flex-start;
-      display: flex;
-      flex-direction: column;
-      justify-content: flex-start;
-      margin-left: var(--space-small);
-      min-width: 0;
-    }
-  }
-}
-
-.header-actions-wrap {
-  align-items: center;
-  display: flex;
-  flex-direction: row;
-  flex-grow: 1;
-  justify-content: flex-end;
-
-  &.has-open-sidebar {
-    justify-content: flex-end;
-  }
-}
+// File to be removed