Replace the SignalR-circuit-race-prone Playwright component tests for
GameEdit, Settings, metadata, profile, roles and users with in-process
bUnit component tests. Keep a thin Playwright smoke layer for the true
E2E paths (login, admin navigation/routing, first-time setup, game
import) that bUnit cannot cover.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
