Various enhancements, restyling and new options

module.js

@@ -163,6 +163,33 @@ Hooks.once("init", () => {
     onChange: () => roleRenderer?.rerenderStrip(),
   });
 
+  // Tile shape for participant avatars in the Director's Board
+  adapter.settings.register("tileShape", {
+    scope: "world",
+    config: false,
+    type: String,
+    default: "circle",
+    onChange: () => roleRenderer?.rerenderStrip(),
+  });
+
+  // Tile border width around video shapes (px). 0 = no border.
+  adapter.settings.register("tileBorderWidth", {
+    scope: "world",
+    config: false,
+    type: Number,
+    default: 0,
+    onChange: () => roleRenderer?.rerenderStrip(),
+  });
+
+  // Tile border color around video shapes.
+  adapter.settings.register("tileBorderColor", {
+    scope: "world",
+    config: false,
+    type: String,
+    default: "#ffffff",
+    onChange: () => roleRenderer?.rerenderStrip(),
+  });
+
   // Story 5.2: Video widget width customization — world-scoped settings for small and large tile widths
   adapter.settings.register("widgetWidthSm", {
     scope: "world",