Stock is scoped to a catalog + cost centers only, per direction that
physical GRV/stock-take/recipe transactions belong in an external
system (Matrix), not this accounting app. Stock Control/GRN/Variance/
PPV GL accounts are now plain postable accounts rather than locked
control accounts.
Also fixes session loss on page refresh: auth stores now persist to
localStorage, and ProtectedRoute waits for rehydration before deciding
to redirect to login.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JWqiUSojMLUoN7mrJqdEbN
