* fix(memory-wiki): support Unicode characters in slugifyWikiSegment
Replace ASCII-only regex with Unicode-aware regex to preserve CJK,
Cyrillic, Arabic, and other non-ASCII characters in wiki slugs.
Fixes#64620
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* test(memory-wiki): cover Unicode slug regressions
* fix(memory-wiki): preserve combining marks in slugs
* fix(memory-wiki): cap composed source filenames
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
