Fix updater GetUserByName error, mask backup credentials, clean up old scripts

- Migrate deprecated updateRepo value (Sucukdeluxe/) to new default (Administrator/)
- Mask sensitive fields (tokens, passwords) in backup export with ***
- Preserve current credentials when importing backup with masked values
- Remove 22 obsolete release_v*.mjs scripts, release_codeberg.mjs, set_version_node.mjs
- Remove release:codeberg script from package.json

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main/app-controller.ts

@@ -283,7 +283,14 @@ export class AppController {
   }
 
   public exportBackup(): string {
-    const settings = this.settings;
+    const settings = { ...this.settings };
+    const SENSITIVE_KEYS: (keyof AppSettings)[] = ["token", "megaPassword", "bestToken", "allDebridToken"];
+    for (const key of SENSITIVE_KEYS) {
+      const val = settings[key];
+      if (typeof val === "string" && val.length > 0) {
+        (settings as Record<string, unknown>)[key] = `***${val.slice(-4)}`;
+      }
+    }
     const session = this.manager.getSession();
     return JSON.stringify({ version: 1, settings, session }, null, 2);
   }
@@ -298,7 +305,15 @@ export class AppController {
     if (!parsed || typeof parsed !== "object" || !parsed.settings || !parsed.session) {
       return { restored: false, message: "Kein gültiges Backup (settings/session fehlen)" };
     }
-    const restoredSettings = normalizeSettings(parsed.settings as AppSettings);
+    const importedSettings = parsed.settings as AppSettings;
+    const SENSITIVE_KEYS: (keyof AppSettings)[] = ["token", "megaPassword", "bestToken", "allDebridToken"];
+    for (const key of SENSITIVE_KEYS) {
+      const val = (importedSettings as Record<string, unknown>)[key];
+      if (typeof val === "string" && val.startsWith("***")) {
+        (importedSettings as Record<string, unknown>)[key] = (this.settings as Record<string, unknown>)[key];
+      }
+    }
+    const restoredSettings = normalizeSettings(importedSettings);
     this.settings = restoredSettings;
     saveSettings(this.storagePaths, this.settings);
     this.manager.setSettings(this.settings);