fix(stalker): keep renderer helpers ES2018 compatible

libs/playlist/import/feature/src/lib/stalker-portal-import/stalker-import-playlist.ts

@@ -189,7 +189,11 @@ function required(value: string | null): string {
 }
 
 function compact<T extends object>(value: T): T {
-    return Object.fromEntries(
-        Object.entries(value).filter(([, entry]) => entry !== undefined)
-    ) as T;
+    const result: Record<string, unknown> = {};
+    for (const [key, entry] of Object.entries(value)) {
+        if (entry !== undefined) {
+            result[key] = entry;
+        }
+    }
+    return result as T;
 }

libs/services/src/lib/playlist-backup.service.ts

@@ -1369,13 +1369,13 @@ export class PlaylistBackupService {
         if (value === undefined) {
             return '';
         }
-        return JSON.stringify(
-            Object.fromEntries(
-                Object.entries(value)
-                    .filter(([, field]) => field !== undefined)
-                    .sort(([left], [right]) => left.localeCompare(right))
-            )
-        );
+        const stable: Record<string, unknown> = {};
+        for (const [key, field] of Object.entries(value)
+            .filter(([, entry]) => entry !== undefined)
+            .sort(([left], [right]) => left.localeCompare(right))) {
+            stable[key] = field;
+        }
+        return JSON.stringify(stable);
     }
 
     private canonicalizeM3u(rawM3u: string): string {