Add user authentication with login/signup/protected routes, boss pokemon
detail fields and result team tracking, moves and abilities selector
components and API, run ownership and visibility controls, and various
UI improvements across encounters, run list, and journal pages.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Set up PostgreSQL database layer with async SQLAlchemy 2.0 and asyncpg driver.
Implements 6 core tables (games, routes, pokemon, route_encounters, nuzlocke_runs,
encounters) with foreign keys, indexes, and an initial Alembic migration.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>