Add JWT auth with per-user data isolation and account settings.

Users can register, log in, and manage profile/password in a personal account page; server data is scoped by owner across contacts, maps, tags, and import.

Co-authored-by: Cursor <cursoragent@cursor.com>

docker-compose.yml

@@ -11,6 +11,7 @@ services:
       - sqlite_data:/app/data
     environment:
       - DJANGO_SETTINGS_MODULE=config.settings
+      - USE_JWT_AUTH=true
     ports:
       - "8000:8000"
     restart: unless-stopped