Add configurable parallel extraction count (1-8, default 2)

- New setting maxParallelExtract in AppSettings
- UI input in Entpacken tab: "Parallele Entpackungen"
- Replaces hardcoded maxConcurrent=2 in acquirePostProcessSlot

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

src/main/constants.ts

@@ -64,6 +64,7 @@ export function defaultSettings(): AppSettings {
     reconnectWaitSeconds: 45,
     completedCleanupPolicy: "never",
     maxParallel: 4,
+    maxParallelExtract: 2,
     retryLimit: 0,
     speedLimitEnabled: false,
     speedLimitKbps: 0,

src/main/download-manager.ts

@@ -2997,7 +2997,7 @@ export class DownloadManager extends EventEmitter {
   }
 
   private async acquirePostProcessSlot(): Promise<void> {
-    const maxConcurrent = 2;
+    const maxConcurrent = this.settings.maxParallelExtract || 2;
     if (this.packagePostProcessActive < maxConcurrent) {
       this.packagePostProcessActive += 1;
       return;

src/main/storage.ts

@@ -96,6 +96,7 @@ export function normalizeSettings(settings: AppSettings): AppSettings {
     autoResumeOnStart: Boolean(settings.autoResumeOnStart),
     autoReconnect: Boolean(settings.autoReconnect),
     maxParallel: clampNumber(settings.maxParallel, defaults.maxParallel, 1, 50),
+    maxParallelExtract: clampNumber(settings.maxParallelExtract, defaults.maxParallelExtract, 1, 8),
     retryLimit: clampNumber(settings.retryLimit, defaults.retryLimit, 0, 99),
     reconnectWaitSeconds: clampNumber(settings.reconnectWaitSeconds, defaults.reconnectWaitSeconds, 10, 600),
     completedCleanupPolicy: settings.completedCleanupPolicy,

src/renderer/App.tsx

@@ -2431,6 +2431,7 @@ export function App(): ReactElement {
                     <label className="toggle-line"><input type="checkbox" checked={settingsDraft.autoRename4sf4sj} onChange={(e) => setBool("autoRename4sf4sj", e.target.checked)} /> Auto-Rename (Beta)</label>
                     <label className="toggle-line"><input type="checkbox" checked={settingsDraft.createExtractSubfolder} onChange={(e) => setBool("createExtractSubfolder", e.target.checked)} /> Entpackte Dateien in Paket-Unterordner speichern</label>
                     <label className="toggle-line"><input type="checkbox" checked={settingsDraft.hybridExtract} onChange={(e) => setBool("hybridExtract", e.target.checked)} /> Hybrid-Extract</label>
+                    <div><label>Parallele Entpackungen</label><input type="number" min={1} max={8} value={settingsDraft.maxParallelExtract} onChange={(e) => setNum("maxParallelExtract", Math.max(1, Math.min(8, Number(e.target.value) || 2)))} /></div>
                     <label className="toggle-line"><input type="checkbox" checked={settingsDraft.collectMkvToLibrary} onChange={(e) => setBool("collectMkvToLibrary", e.target.checked)} /> MKV nach Paketabschluss in Sammelordner verschieben (flach)</label>
                     <label>MKV-Sammelordner</label>
                     <div className="input-row">

src/shared/types.ts

@@ -65,6 +65,7 @@ export interface AppSettings {
   reconnectWaitSeconds: number;
   completedCleanupPolicy: FinishedCleanupPolicy;
   maxParallel: number;
+  maxParallelExtract: number;
   retryLimit: number;
   speedLimitEnabled: boolean;
   speedLimitKbps: number;