refactor: migrate to new db_* Directus collections
- DrawIt: load db_pictures (status=draft), create db_objects/db_words
with blurhash placeholder, finish sets status=objects_created
- GenerateIt: load db_pictures (status=objects_created), right panel
replaced with manual QA pairs (db_pairs + db_question + db_statement)
- Backend: new routes for db_pictures, db_objects, db_words, db_pairs
- Types/API: full db_* type definitions and API helpers
- Directus: user_notes field in db_objects, M2M db_words<->db_pictures
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
admin
7c983a7460