refactor(storefront): remove supabase shim and restore customer storefronts

The legacy src/lib/supabase.ts shim returned { data: null } for every
query, so 15+ pages were silently rendering empty state — including the
two customer-facing storefronts (tuxedo, indian-river-direct) and
several v1 admin pages. Replace every caller with canonical access:

- New src/actions/storefront.ts server-action module: brand lookup,
  public stops, active products, stop-by-slug, wholesale settings,
  portal config. Uses the shared pg Pool and SECURITY DEFINER RPCs.
- src/actions/brand-settings.ts: getBrandSettingsPublic inlined the
  brands + brand_settings LEFT JOIN wholesale_settings query (the
  RPC it called did not exist; try/catch was masking the failure).
- src/actions/ai/preferences.ts: switched get/saveAIPreferences to
  pool.query.
- src/actions/square-sync-ui.ts: new getSquareQueueCount action for
  SquareSyncWidget (replaces shim count).
- src/app/api/{tuxedo,indian-river-direct}/schedule-pdf/route.ts:
  use pool.query.
- next.config.ts: redirects /admin/{products/:id,reports,taxes,
  settings/{shipping,integrations,billing}} → their v2 / settings
  equivalents, then deleted those pages.
- Deleted src/lib/supabase.ts (no remaining imports).

Tests: 174/175 (unchanged from baseline; pre-existing getAdminUser
mock issue is tracked in Step 5).

src/app/indian-river-direct/faq/FAQClientPage.tsx

@@ -6,7 +6,7 @@ import { motion } from "framer-motion";
 import StorefrontHeader from "@/components/storefront/StorefrontHeader";
 import StorefrontFooter from "@/components/storefront/StorefrontFooter";
 import LayoutContainer from "@/components/layout/LayoutContainer";
-import { supabase } from "@/lib/supabase";
+import { getBrandSettingsPublic } from "@/actions/brand-settings";
 
 type FAQCategory = {
   category: string;
@@ -136,10 +136,10 @@ export default function IndianRiverFAQPage() {
   const [searchQuery, setSearchQuery] = useState("");
 
   useEffect(() => {
-    supabase.from("brand_settings").select("phone").eq("brand_id",
-      "b1cb7a96-d82b-40b1-80b1-d6dd26c56e28"
-    ).single().then(({ data }) => {
-      if (data && (data as { phone: string | null }).phone) setFaqCategories(buildFaqCategories((data as { phone: string | null }).phone!));
+    getBrandSettingsPublic("indian-river-direct").then((result) => {
+      if (result.success && result.settings?.phone) {
+        setFaqCategories(buildFaqCategories(result.settings.phone));
+      }
     });
   }, []);