clean up code and logs (#1809)

abstract base64 functions and clean up console logs

frontend/projects/shared/src/util/base-64.ts

@@ -0,0 +1,9 @@
+import * as Base64 from 'base64-js'
+
+export function encodeBase64(text: string) {
+  return Base64.fromByteArray(new TextEncoder().encode(text))
+}
+
+export function decodeBase64(encoded: string) {
+  return new TextDecoder().decode(Base64.toByteArray(encoded))
+}