fix(smartacme,storage): Respect wildcard domain requests when retrieving certificates and treat empty/whitespace storage values as null in getJSON

ts/storage/classes.storagemanager.ts

@@ -378,7 +378,7 @@ export class StorageManager {
    */
   async getJSON<T = any>(key: string): Promise<T | null> {
     const value = await this.get(key);
-    if (value === null) {
+    if (value === null || value.trim() === '') {
       return null;
     }