fix(auth): correctly check role name in isAdmin — roles from /auth/me are objects not strings

fix(frontend): flatten disease info + add loading state to dashboard

fix(auth): use absolute API_BASE URLs for auth and admin endpoints

fix(auth): wire api.setToken() on login, logout, and page reload

feat(dark-mode): add ThemeContext with OS preference detection and persistence

feat(auth): add AuthContext with JWT login/logout and role detection

refactor(frontend): update components, hooks, utils for v2 platform

feat(context): add DiseaseProvider with schema pre-fetching and disease hooks