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lib/utils/sanitize.ts

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+import sanitize from 'sanitize-filename';
+
+export function sanitizeName(name: string): string {
+    // Use the same logic as album name to keep consistency and allow brackets
+    return sanitizeAlbumName(name);
+}
+
+export function sanitizeAlbumName(name: string): string {
+    // 1. Replace " / " or "/" with ", "
+    let clean = name.replace(/\s*\/\s*/g, ', ');
+
+    // 1.5 Replace "&" with "and"
+    clean = clean.replace(/&/g, 'and');
+
+    // 2. Remove accents/diacritics (e.g. "Espírito" -> "Espirito")
+    // Note: Re-normalizing to NFC to correctly recompose Korean Hangul characters
+    clean = clean.normalize("NFD").replace(/[\u0300-\u036f]/g, "").normalize("NFC");
+
+    // 3. Remove non-ascii characters but keep [], (), spaces, hyphens and plus signs.
+    // Also allow Asian characters (Chinese, Japanese, Korean) along with CJK punctuation.
+    const allowed = /[^a-zA-Z0-9 \-_.\[\](),+\p{Script=Han}\p{Script=Hiragana}\p{Script=Katakana}\p{Script=Hangul}\u3000-\u303F\uFF00-\uFFEF]/gu;
+
+    clean = clean.replace(allowed, '');
+
+    // 4. Remove double spaces
+    clean = clean.replace(/\s+/g, ' ');
+
+    return clean.trim();
+}