fix(youtube): various unthemed texts related to playlists (#1555)

Co-authored-by: uncenter <[email protected]>

styles/youtube/catppuccin.user.less

@@ -1210,6 +1210,29 @@
     .video-summary-content-view-model-wiz__paragraph {
       color: @text;
     }
+
+    /* Playlist collapsed sidebar */
+    #next-video-title {
+      color: @text !important;
+    }
+    #publisher-container {
+      .yt-simple-endpoint.style-scope.yt-formatted-string,
+      .index-message-wrapper.style-scope.ytd-playlist-panel-renderer,
+      .index-message-wrapper.style-scope.ytd-playlist-panel-renderer::before {
+        color: @subtext0 !important;
+      }
+    }
+
+    /* Playlist metadata */
+    .metadata-stats.style-scope.ytd-playlist-byline-renderer,
+    .yt-lockup-metadata-view-model-wiz__metadata {
+      color: @subtext0 !important;
+    }
+
+    /* Playlist titles in search results */
+    .yt-core-attributed-string.yt-core-attributed-string--white-space-pre-wrap {
+      color: @text !important;
+    }
   }
 }