Replace isPublic boolean with visibility enum (private/link/public) across
the full stack. Add shares table to schema for future share link support.
Update all services, routes, schemas, hooks, components, and tests.
Plan: 32-01 (Setup Sharing System - Schema Migration)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Migration adds dominant_color, crop_zoom, crop_x, crop_y to items,
global_items, and thread_candidates. Run db:push to apply.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Add globalItemId and purchasePriceCents columns to items table
- Add globalItemId column to threadCandidates table
- Add tags and globalItemTags tables for tag system
- Remove itemGlobalLinks table (replaced by direct FK)
- Generate migration with data migration step before table drop