Method setupResizeObserver

src/utils/VirtualScroller.ts:398–418

* Setup ResizeObserver to detect height changes in rendered items

()

	 * Setup ResizeObserver to detect height changes in rendered items
	 */
	private setupResizeObserver(): void {
		this.resizeObserver = new ResizeObserver((entries) => {
			// Collect indices that need remeasurement
			for (const entry of entries) {
				const element = entry.target as HTMLElement;
				const index = parseInt(element.dataset.virtualIndex || "-1", 10);

				if (index >= 0 && index < this.items.length) {
					this.pendingMeasurements.add(index);
				}
			}

			// Debounce the actual measurement update
			if (this.measurementRAF === null) {
				this.measurementRAF = window.requestAnimationFrame(() => {
					this.processPendingMeasurements();
					this.measurementRAF = null;
				});
			}
		});
	}

	/**
	 * Measure items and update position cache if heights changed