314ed3756a Fix import failures for Japanese filenames with dakuten on macOS (#35204)
* 🐛 fix: normalize Unicode filenames in import attachment lookup

Fix import failures for files with Japanese dakuten/handakuten characters
(e.g., ガ, パ, べ) on macOS.

macOS stores filenames in NFD (decomposed) form while Linux/Windows use
NFC (composed) form. This mismatch caused attachment lookup failures
when zip filenames and JSONL paths used different normalization forms.

Changes:
- Add NormalizeFilename utility function using golang.org/x/text/unicode/norm
- Normalize filenames when building attachment maps from zip files
- Normalize paths when looking up attachments in maps
- Apply fixes to both server (import.go) and mmctl (validate.go)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* avoid duplicating normalizeFilename

* add coverage for Korean filenames

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: Jesse Hallam <jesse@mattermost.com>
Co-authored-by: Mattermost Build <build@mattermost.com>
2026-03-18 12:16:55 +00:00
2026-03-18 12:07:34 +00:00
2018-05-30 10:23:25 -04:00

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