Fix: Settings-only-Backup-Import wischte Live-Queue + Zaehler (B/I)

importBackup wendete die Settings fuer beide Pfade ueber setSettings an, das bei
nicht-"never"-CleanupPolicy applyRetroactiveCleanupPolicy ausloest. Beim reinen
Settings-Restore purgte das die LIVE-Queue (fertige Items), obwohl der Vertrag
"running queue stays untouched" lautet (Dateien blieben auf Platte). Zudem rollte
der Import die laufenden Usage-/Status-Zaehler auf den (aelteren) Backup-Stand
zurueck (anders als updateSettings).

- setSettings bekommt optionales { suppressRetroactiveCleanup }; der Settings-only
  Import setzt es. Die importierte Policy gilt weiter fuer KUENFTIGE Completions
  ueber den normalen Vorwaertspfad (immediate/package_done) — nur der retroaktive
  Sweep wird hier unterdrueckt.
- overlayLiveUsageCounters aus updateSettings extrahiert und im Settings-only Import
  wiederverwendet (inkl. Key-Filter der Debrid-Link-Per-Key-Usage auf existierende
  Keys). Nicht ueber updateSettings geroutet (vermeidet dessen resetHistoryForRetention).

src/main/app-controller.ts

@@ -303,6 +303,27 @@ export class AppController {
     return next;
   }
 
+  // Carry the live, runtime-maintained usage/status counters onto a settings
+  // object about to be applied, so they are never rolled back to a stale snapshot.
+  // All-time totals take the max; daily/total usage and account statuses are taken
+  // live; per-key Debrid-Link usage is filtered to keys that still exist.
+  private overlayLiveUsageCounters(target: AppSettings): void {
+    const liveSettings = this.manager.getSettings();
+    target.totalDownloadedAllTime = Math.max(target.totalDownloadedAllTime || 0, liveSettings.totalDownloadedAllTime || 0);
+    target.totalCompletedFilesAllTime = Math.max(target.totalCompletedFilesAllTime || 0, liveSettings.totalCompletedFilesAllTime || 0);
+    target.totalRuntimeAllTimeMs = Math.max(target.totalRuntimeAllTimeMs || 0, this.manager.getLiveTotalRuntimeMs());
+    target.providerDailyUsageDay = liveSettings.providerDailyUsageDay;
+    target.providerDailyUsageBytes = { ...(liveSettings.providerDailyUsageBytes || {}) };
+    target.providerTotalUsageBytes = { ...(liveSettings.providerTotalUsageBytes || {}) };
+    target.debridLinkApiKeyDailyUsageBytes = Object.fromEntries(
+      Object.entries(liveSettings.debridLinkApiKeyDailyUsageBytes || {}).filter(([keyId]) => getDebridLinkApiKeyIds(target.debridLinkApiKeys).includes(keyId))
+    );
+    target.debridLinkApiKeyTotalUsageBytes = Object.fromEntries(
+      Object.entries(liveSettings.debridLinkApiKeyTotalUsageBytes || {}).filter(([keyId]) => getDebridLinkApiKeyIds(target.debridLinkApiKeys).includes(keyId))
+    );
+    target.debridAccountStatuses = { ...(liveSettings.debridAccountStatuses || {}) };
+  }
+
   public updateSettings(partial: Partial<AppSettings>): AppSettings {
     const sanitizedPatch = sanitizeSettingsPatch(partial);
     const previousSettings = this.settings;
@@ -315,20 +336,7 @@ export class AppController {
       return previousSettings;
     }
 
-    const liveSettings = this.manager.getSettings();
+    this.overlayLiveUsageCounters(nextSettings);
-    nextSettings.totalDownloadedAllTime = Math.max(nextSettings.totalDownloadedAllTime || 0, liveSettings.totalDownloadedAllTime || 0);
-    nextSettings.totalCompletedFilesAllTime = Math.max(nextSettings.totalCompletedFilesAllTime || 0, liveSettings.totalCompletedFilesAllTime || 0);
-    nextSettings.totalRuntimeAllTimeMs = Math.max(nextSettings.totalRuntimeAllTimeMs || 0, this.manager.getLiveTotalRuntimeMs());
-    nextSettings.providerDailyUsageDay = liveSettings.providerDailyUsageDay;
-    nextSettings.providerDailyUsageBytes = { ...(liveSettings.providerDailyUsageBytes || {}) };
-    nextSettings.providerTotalUsageBytes = { ...(liveSettings.providerTotalUsageBytes || {}) };
-    nextSettings.debridLinkApiKeyDailyUsageBytes = Object.fromEntries(
-      Object.entries(liveSettings.debridLinkApiKeyDailyUsageBytes || {}).filter(([keyId]) => getDebridLinkApiKeyIds(nextSettings.debridLinkApiKeys).includes(keyId))
-    );
-    nextSettings.debridLinkApiKeyTotalUsageBytes = Object.fromEntries(
-      Object.entries(liveSettings.debridLinkApiKeyTotalUsageBytes || {}).filter(([keyId]) => getDebridLinkApiKeyIds(nextSettings.debridLinkApiKeys).includes(keyId))
-    );
-    nextSettings.debridAccountStatuses = { ...(liveSettings.debridAccountStatuses || {}) };
     const retentionChanged = previousSettings.historyRetentionMode !== nextSettings.historyRetentionMode;
     this.settings = nextSettings;
     if (retentionChanged) {
@@ -697,14 +705,18 @@ public async checkDebridAccounts(): Promise<DebridAccountStatus[]> {
       }
     }
     const restoredSettings = normalizeSettings(importedSettings);
+
+    // Settings-only backup: keep the running queue AND the live counters untouched.
+    // Overlay the live usage/status counters so they don't roll back to the backup's
+    // (older) snapshot (BUG I), and suppress the retroactive cleanup sweep so the
+    // backup's cleanup policy can't purge the live completed queue here (BUG B) — the
+    // policy still governs FUTURE completions through the normal path. Do NOT stop the
+    // manager, wipe the session, block persistence or relaunch.
+    if (!hasSession) {
+      this.overlayLiveUsageCounters(restoredSettings);
       this.settings = restoredSettings;
       saveSettings(this.storagePaths, this.settings);
-    this.manager.setSettings(this.settings);
+      this.manager.setSettings(this.settings, { suppressRetroactiveCleanup: true });
-
-    // Settings-only backup: settings are already applied live (same path as the
-    // normal updateSettings flow). Do NOT stop the manager, wipe the session,
-    // block persistence or relaunch — the running queue stays untouched.
-    if (!hasSession) {
       this.audit("INFO", "Backup importiert (nur Einstellungen)", {
         accountSummary: buildAccountSummary(this.settings)
       });
@@ -715,6 +727,10 @@ public async checkDebridAccounts(): Promise<DebridAccountStatus[]> {
       };
     }
 
+    this.settings = restoredSettings;
+    saveSettings(this.storagePaths, this.settings);
+    this.manager.setSettings(this.settings);
+
     this.manager.stop();
     this.manager.abortAllPostProcessing();
     this.manager.clearPersistTimer();

src/main/download-manager.ts

@@ -2081,7 +2081,7 @@ export class DownloadManager extends EventEmitter {
     this.emitState();
   }
 
-  public setSettings(next: AppSettings): void {
+  public setSettings(next: AppSettings, opts?: { suppressRetroactiveCleanup?: boolean }): void {
     const previous = this.settings;
     next.totalDownloadedAllTime = Math.max(next.totalDownloadedAllTime || 0, this.settings.totalDownloadedAllTime || 0);
     next.totalCompletedFilesAllTime = Math.max(next.totalCompletedFilesAllTime || 0, this.settings.totalCompletedFilesAllTime || 0);
@@ -2145,7 +2145,7 @@ export class DownloadManager extends EventEmitter {
 
     this.resolveExistingQueuedOpaqueFilenames();
     void this.cleanupExistingExtractedArchives().catch((err) => logger.warn(`cleanupExistingExtractedArchives Fehler (setSettings): ${compactErrorText(err)}`));
-    if (next.completedCleanupPolicy !== "never") {
+    if (!opts?.suppressRetroactiveCleanup && next.completedCleanupPolicy !== "never") {
       this.applyRetroactiveCleanupPolicy();
     }
     this.emitState();