fix(ui): simplify operator layout picker

src/trx-client/trx-frontend/trx-frontend-http/assets/web/style.css

@@ -2949,8 +2949,7 @@ button.is-active {
 #ptt-btn.is-active { background: var(--accent-red) !important; border-color: var(--accent-red) !important; color: white !important; }
 .is-busy { cursor: progress !important; opacity: 0.68; }
 .operator-layout-picker {
-  display: inline-grid;
-  grid-template-columns: auto auto;
+  display: inline-flex;
   align-items: center;
   min-height: 2rem;
   padding-left: 0.6rem;
@@ -2980,17 +2979,6 @@ button.is-active {
 }
 .operator-layout-picker:focus-within { border-color: var(--accent-green); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent-green) 20%, transparent); }
 .operator-layout-picker select:focus-visible { outline: 0; }
-.operator-layout-description {
-  grid-column: 1 / -1;
-  max-width: 22rem;
-  padding: 0 0.55rem 0.35rem 0;
-  color: var(--text-muted);
-  font-size: var(--fs-xs);
-  font-weight: 500;
-  letter-spacing: 0;
-  line-height: 1.35;
-  text-transform: none;
-}
 .advanced-radio-controls {
   margin-top: var(--space-3);
   border: 1px solid color-mix(in srgb, var(--border-light) 75%, transparent);