feat(frontend): modernize Angular app

ui/src/app/pipes/file-size.pipe.ts

@@ -0,0 +1,16 @@
+import { Pipe, PipeTransform } from "@angular/core";
+
+@Pipe({
+    name: 'fileSize',
+})
+export class FileSizePipe implements PipeTransform {
+  transform(value: number): string {
+      if (isNaN(value) || value === 0) return '0 Bytes';
+
+      const units = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
+      const unitIndex = Math.floor(Math.log(value) / Math.log(1000)); // Use 1000 for common units
+
+      const unitValue = value / Math.pow(1000, unitIndex);
+      return `${unitValue.toFixed(2)} ${units[unitIndex]}`;
+  }
+}