v1.31.6

Fixed

• Follow-up hardening for the CardDAV contact import (#531): imported contacts whose category could not be mapped no longer downgrade an existing, manually chosen category when an already-local contact is adopted during sync; the category fallback now also stays valid when the household has deleted the default "misc" category. The manual .vcf file importer's vCard unescaping was switched to the same single-pass logic as the CardDAV sync, closing an ordering edge case with \\ escape sequences. Behavior is unchanged for normal contacts; this only affects the edge cases above.