4.12.25

🐛 Bug Fix

• Source mode / complex scripts (Thai, Arabic, Hindi, Hebrew, Persian): the ACE source editor was loaded from CDN at version 1.4.2 (2018), which predates working bidirectional-text and combining-character support — complex-script text rendered misaligned with the underlying code ("invisible characters" after lines), the caret/selection landed on the wrong characters and copying lost as many characters as there were combining marks. The default sourceEditorCDNUrlsJS now points to ACE 1.43.3, which ships an automatic per-line bidi handler and years of complex-script rendering fixes; all existing source-mode integration tests pass against the new build, plus new regression tests for the Thai round-trip and the bidi layer.