75a7063bff
Backend: - Create app/models/user_preference.py with TenantMixin (user_id, key, value JSONB) - Create app/routes/user_preferences.py with GET/PUT/DELETE endpoints + RBAC - Add user_preferences:read/write to CORE_PERMISSIONS - Add user_preferences to legacy role permissions (admin/editor/viewer) - Register route in app/main.py and app/routes/__init__.py - Create alembic migration 0028_user_preferences - Add UserPreference model to conftest.py for test schema - Fix pre-existing conftest seed (Contact industry field removed in migration 0027) Frontend: - Create frontend/src/api/userPreferences.ts with React Query hooks - Create frontend/src/hooks/useUserPreferences.ts syncing with uiStore - Add i18n entries for de.json and en.json Tests: - 13 tests covering CRUD, tenant isolation, CSRF, unauthenticated access - All tests passing