fix(multiple-subtitles): [PKG-MULTI-SUB-08] preserve entity text and semantic cue wrappers

packages/artplayer-plugin-multiple-subtitles/src/text.ts

@@ -0,0 +1,20 @@
+// Keep the vendor's lenient aliases while making complete named references exact.
+export const cueEntities = {
+  '&amp': '&',
+  '&': '&',
+  '&lt': '<',
+  '&lt;': '<',
+  '&gt': '>',
+  '&gt;': '>',
+  '&lrm': '\u200E',
+  '&lrm;': '\u200E',
+  '&rlm': '\u200F',
+  '&rlm;': '\u200F',
+  '&nbsp': '\u00A0',
+  '&nbsp;': '\u00A0',
+}
+
+// Serialization protects the whole VTT once; this protects cue text after onVttLoad unescape.
+export function escapeCueText(value: string): string {
+  return value.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;')
+}