fix(ts_web): resolve TypeScript nullability and event typing issues across web components

ts_web/elements/00group-media/dees-pdf-shared/utils.ts

@@ -21,9 +21,9 @@ export function throttle<T extends (...args: any[]) => any>(
 ): (...args: Parameters<T>) => void {
   let inThrottle: boolean;
 
-  return function executedFunction(...args: Parameters<T>) {
+  return (...args: Parameters<T>) => {
     if (!inThrottle) {
-      func.apply(this, args);
+      func(...args);
       inThrottle = true;
       setTimeout(() => inThrottle = false, limit);
     }

ts_web/elements/00group-media/dees-tile-pdf/demo.ts

@@ -7,7 +7,7 @@ export const demo = () => {
   ];
 
   const generateGridItems = (count: number) => {
-    const items = [];
+    const items: ReturnType<typeof html>[] = [];
     for (let i = 0; i < count; i++) {
       const pdfUrl = samplePdfs[i % samplePdfs.length];
       items.push(html`