Minor codereview fixes.

src/components/timeline.ts

@@ -849,6 +849,12 @@ export class FrigateCardTimelineCore extends LitElement {
     }
   }
 
+  /**
+   * Generate the context for timeline views.
+   * @param addWindow Whether or not to include the timeline window. If `false`
+   * the window is preserved if it is already in the context.
+   * @returns The TimelineViewContext object.
+   */
   protected _generateViewContext(addWindow: boolean): TimelineViewContext {
     const currentContext = this.view?.context as TimelineViewContext | undefined;
     const newContext: TimelineViewContext = {};

src/components/viewer.ts

@@ -256,7 +256,7 @@ export class FrigateCardViewerCarousel extends FrigateCardMediaCarousel {
   protected _getOptions(): EmblaOptionsType {
     return {
       // Start the carousel on the selected child number.
-      startIndex: this._getSlideForChild(this.view?.childIndex) ?? undefined,
+      startIndex: this._getSlideForChild(this.view?.childIndex) ?? 0,
       draggable: this.viewerConfig?.draggable,
     };
   }