Bonus dir detection: normalize separators (Making.Of, Behind.The.Scenes)

The v1.7.130 BONUS_DIR_PATTERNS used substring matching with space-separated
patterns like "making of" and "behind the scenes", but real-world subfolder
names use dot/dash/underscore separators (e.g. "Breaking.Bad.S05.Making.Of").
These were NOT detected as bonus dirs, causing the safety net in v1.7.131 to
apply the source filename's episode token to the package name, producing
mislabeled bonus files like "Breaking.Bad.S05E10.GERMAN.BluRay.720p.TSCC".

Fix: normalize folder segments by stripping all separators ([._-\s]+) before
matching against BONUS_DIR_NORMALIZED_PATTERNS. "Breaking.Bad.S05.Making.Of"
normalizes to "breakingbads05makingof" which matches "makingof".

Also extend BONUS_FILENAME_RE with "inside-e\d+" and "making-of-e\d+" to
catch more filename variants from Breaking Bad BluRay extras.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/download-manager.test.ts

@@ -9451,6 +9451,99 @@ describe("download manager", () => {
     expect(fs.existsSync(flattenedEpisode)).toBe(true);
   }, 20000);
 
+  it("detects dot-separated bonus subdirectories (Making.Of, Behind.The.Scenes)", async () => {
+    const root = fs.mkdtempSync(path.join(os.tmpdir(), "rd-dm-"));
+    tempDirs.push(root);
+
+    const packageName = "Breaking.Bad.S05.GERMAN.DL.720p.BluRay.x264-TSCC";
+    const outputDir = path.join(root, "downloads", packageName);
+    const extractDir = path.join(root, "extract", packageName);
+    fs.mkdirSync(outputDir, { recursive: true });
+
+    // Mix of dot-separated bonus subdirs - must all be detected as bonus
+    const zip = new AdmZip();
+    zip.addFile("Breaking.Bad.S05E01.GERMAN.DL.720p.BluRay.x264-TSCC.mkv", Buffer.from("real-episode"));
+    zip.addFile("Breaking.Bad.S05.Making.Of/SomeBonusClip.mkv", Buffer.from("bonus-1"));
+    zip.addFile("Breaking.Bad.S05.Behind.The.Scenes/AnotherClip.mkv", Buffer.from("bonus-2"));
+    zip.addFile("Breaking.Bad.S05.Deleted.Scenes/DeletedClip.mkv", Buffer.from("bonus-3"));
+    zip.addFile("Breaking.Bad.S05.Gag.Reel/GagClip.mkv", Buffer.from("bonus-4"));
+    const archivePath = path.join(outputDir, "episode.zip");
+    zip.writeZip(archivePath);
+    const archiveSize = fs.statSync(archivePath).size;
+
+    const session = emptySession();
+    const packageId = `${packageName}-pkg`;
+    const itemId = `${packageName}-item`;
+    const createdAt = Date.now() - 20_000;
+    session.packageOrder = [packageId];
+    session.packages[packageId] = {
+      id: packageId,
+      name: packageName,
+      outputDir,
+      extractDir,
+      status: "downloading",
+      itemIds: [itemId],
+      cancelled: false,
+      enabled: true,
+      createdAt,
+      updatedAt: createdAt
+    };
+    session.items[itemId] = {
+      id: itemId,
+      packageId,
+      url: `https://dummy/${packageName}`,
+      provider: "realdebrid",
+      status: "completed",
+      retries: 0,
+      speedBps: 0,
+      downloadedBytes: archiveSize,
+      totalBytes: archiveSize,
+      progressPercent: 100,
+      fileName: "episode.zip",
+      targetPath: archivePath,
+      resumable: true,
+      attempts: 1,
+      lastError: "",
+      fullStatus: "Fertig (100 MB)",
+      createdAt,
+      updatedAt: createdAt
+    };
+
+    const mkvLibraryDir = path.join(root, "mkv-library");
+
+    new DownloadManager(
+      {
+        ...defaultSettings(),
+        token: "rd-token",
+        outputDir: path.join(root, "downloads"),
+        extractDir: path.join(root, "extract"),
+        autoExtract: true,
+        autoRename4sf4sj: false,
+        collectMkvToLibrary: true,
+        mkvLibraryDir,
+        enableIntegrityCheck: false,
+        cleanupMode: "none"
+      },
+      session,
+      createStoragePaths(path.join(root, "state"))
+    );
+
+    const flattenedEpisode = path.join(mkvLibraryDir, "Breaking.Bad.S05E01.GERMAN.DL.720p.BluRay.x264-TSCC.mkv");
+    await waitFor(() => fs.existsSync(flattenedEpisode), 12000);
+
+    // None of the bonus files should have landed in the flat library
+    expect(fs.existsSync(path.join(mkvLibraryDir, "SomeBonusClip.mkv"))).toBe(false);
+    expect(fs.existsSync(path.join(mkvLibraryDir, "AnotherClip.mkv"))).toBe(false);
+    expect(fs.existsSync(path.join(mkvLibraryDir, "DeletedClip.mkv"))).toBe(false);
+    expect(fs.existsSync(path.join(mkvLibraryDir, "GagClip.mkv"))).toBe(false);
+
+    // All bonus files must still exist in their respective subfolders
+    expect(fs.existsSync(path.join(extractDir, "Breaking.Bad.S05.Making.Of", "SomeBonusClip.mkv"))).toBe(true);
+    expect(fs.existsSync(path.join(extractDir, "Breaking.Bad.S05.Behind.The.Scenes", "AnotherClip.mkv"))).toBe(true);
+    expect(fs.existsSync(path.join(extractDir, "Breaking.Bad.S05.Deleted.Scenes", "DeletedClip.mkv"))).toBe(true);
+    expect(fs.existsSync(path.join(extractDir, "Breaking.Bad.S05.Gag.Reel", "GagClip.mkv"))).toBe(true);
+  }, 20000);
+
   it("keeps existing MKV names and appends a suffix while flattening", async () => {
     const root = fs.mkdtempSync(path.join(os.tmpdir(), "rd-dm-"));
     tempDirs.push(root);