chore(i18n): refresh messages.pot creation timestamp to retrigger CI

The previous CI run drift-checked against a stale state and reported
missing msgids that exist in the committed pot at HEAD. Bumping the
POT-Creation-Date forces a fresh CI run with the current branch tip.
No msgid/msgstr changes — the pot already contains the strings CI
flagged.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: MrChengLen

locale/messages.pot

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: FileMorph VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-05-08 15:03+0200\n"
+"POT-Creation-Date: 2026-05-08 15:18+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"