fix(css): remove ::deep from PlayerTransportZone root-element selectors, replace dead controls-left rule

DeepDrftPublic.Client/Controls/AudioPlayerBar/PlayerTransportZone.razor.css

@@ -1,13 +1,13 @@
 /* Stable minimum width so the transport cluster doesn't reflow */
-::deep .controls-left {
-    min-width: 200px;
+.transport-zone {
+    min-width: 180px;
 }
 
 /* Narrow (< 600px): lay the transport root horizontally (controls beside
    timestamp) so it fits on one line next to VolumeControls. Scoped to the
    root .transport-zone stack so the nested controls stack is untouched. */
 @media (max-width: 599.98px) {
-    ::deep .transport-zone {
+    .transport-zone {
         flex-direction: row !important;
         align-items: center;
     }