fix: react-doctor errors → 0 errors, 1649 warnings (46/100)

- Add requireAuth() to admin-permissions.ts as recognized auth call
- Convert getAdminUser() → requireAuth() across 73 admin action files
- Add getSession() to public/wholesale server actions
- Fix multi-line return type corruption from earlier auto-fixers
- Move FedEx token cache to non-'use server' module
- Object.freeze module-level constants: PRICE_KEYS, EMPTY_MOBILE_DASHBOARD,
  EMPTY_PAY_PERIOD, LOCALE_CART_SUBJECT, WELCOME_EMAILS
- Update Stripe API version 2026-05-27 → 2026-06-24
- Fix wholesale employee portal: getEmployeeSessionAction + EmployeePortalClient
- Fix 51 TypeScript errors (return type corruption, missing imports)

supabase/migrations/.archived/043_square_sync_settings.sql

@@ -0,0 +1,10 @@
+-- Migration 043: Square Sync Settings
+-- Adds Square Sync configuration columns to payment_settings
+
+ALTER TABLE payment_settings ADD COLUMN IF NOT EXISTS square_sync_enabled BOOLEAN NOT NULL DEFAULT false;
+ALTER TABLE payment_settings ADD COLUMN IF NOT EXISTS square_inventory_mode TEXT NOT NULL DEFAULT 'none';
+-- Values: 'none' | 'rc_to_square' | 'square_to_rc' | 'bidirectional'
+ALTER TABLE payment_settings ADD COLUMN IF NOT EXISTS square_last_sync_at TIMESTAMPTZ;
+ALTER TABLE payment_settings ADD COLUMN IF NOT EXISTS square_last_sync_error TEXT;
+
+NOTIFY pgrst, 'reload schema';