- PinterestSettings: replace inline error markup with the shared
InputError component (matches the rest of the form patterns)
- Extract PinterestBoard type to @/types and use it across
PinterestSettings, ScheduleTab, PostEditorSidebar, Edit — drops
the duplicated inline {id, name} shape from 4 call sites
- Block publish/schedule when Pinterest is selected but no board is
picked (mirrors tiktokComplianceValid). Tooltip surfaces the same
i18n key the backend uses, so frontend + backend speak the same
language
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