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)

docs/water-log.md

@@ -180,7 +180,7 @@ data explicitly checks its gate.
   cold-start paths; the active `getAdminUser().brand_id` always wins
   on later requests.
 - No Supabase REST, no service-role keys — all access is direct
-  through Drizzle over a single shared `pg` Pool (see `src/lib/db.ts`).
+  through Drizzle over a single `pg` Pool.
 
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