fix(downloads): restore hardened output scope release gates

Detect stale or foreign files in package-specific extraction directories before starting fresh work while excluding current and atomic ownership markers.

Keep recursive directory inspection confined to the start-conflict boundary and let archive cleanup prune empty package directories directly.

Register German-audio, auto-rename, collection, hybrid, and legacy fixtures through real complete PackageOutputScope records with current method signatures.

Verify plain stops only persist after active work drains, while update-restart parking keeps both its immediate checkpoint and final queued state.

src/main/download-manager.ts

@@ -3518,7 +3518,7 @@ export class DownloadManager extends EventEmitter {
       const extractDirKey = pathKey(pkg.extractDir);
       const hasExtractedFiles = hasFilesByExtractDir.has(extractDirKey)
         ? Boolean(hasFilesByExtractDir.get(extractDirKey))
-        : this.getPackageOutputScope(pkg).completeFiles().some((filePath) => isPathInsideDir(filePath, pkg.extractDir));
+        : await this.directoryHasAnyFiles(pkg.extractDir);
       if (!hasFilesByExtractDir.has(extractDirKey)) {
         hasFilesByExtractDir.set(extractDirKey, hasExtractedFiles);
       }
@@ -4333,14 +4333,12 @@ export class DownloadManager extends EventEmitter {
             }
           }
 
-          if (removed > 0) {
-            logger.info(`Nachträgliches Archive-Cleanup für ${pkg.name}: ${removed} Datei(en) gelöscht`);
-            if (!await this.directoryHasAnyFiles(pkg.outputDir)) {
-              const removedDirs = await this.removeEmptyDirectoryTree(pkg.outputDir);
-              if (removedDirs > 0) {
-                logger.info(`Nachträgliches Cleanup entfernte leere Download-Ordner für ${pkg.name}: ${removedDirs}`);
-              }
-            }
+          if (removed > 0) {
+            logger.info(`Nachträgliches Archive-Cleanup für ${pkg.name}: ${removed} Datei(en) gelöscht`);
+            const removedDirs = await this.removeEmptyDirectoryTree(pkg.outputDir);
+            if (removedDirs > 0) {
+              logger.info(`Nachträgliches Cleanup entfernte leere Download-Ordner für ${pkg.name}: ${removedDirs}`);
+            }
           } else {
             logger.info(`Nachträgliches Archive-Cleanup für ${pkg.name}: keine Dateien entfernt`);
           }
@@ -4374,12 +4372,14 @@ export class DownloadManager extends EventEmitter {
         entries = await fs.promises.readdir(current, { withFileTypes: true });
       } catch {
         continue;
-      }
-
-      for (const entry of entries) {
-        if (entry.isFile() && !isIgnorableEmptyDirFileName(entry.name)) {
-          return true;
-        }
+      }
+
+      for (const entry of entries) {
+        const isOwnerMarker = entry.name === PACKAGE_OUTPUT_OWNER_MARKER
+          || entry.name.startsWith(`.${PACKAGE_OUTPUT_OWNER_MARKER}.`);
+        if (entry.isFile() && !isOwnerMarker && !isIgnorableEmptyDirFileName(entry.name)) {
+          return true;
+        }
         if (entry.isDirectory()) {
           stack.push(path.join(current, entry.name));
         }