refactor(storefront): replace supabase shim in storefront pages

The legacy lib/supabase.ts shim returns { data: null } for every query,
which silently broke the tuxedo and indian-river-direct storefronts:
they displayed 'No stops on the calendar just yet' regardless of the
real data in Postgres.

Added src/actions/storefront.ts as a new "use server" module with
typed actions that hit the shared pg pool directly:
  - getStorefrontData(slug) — brand + stops + products in one call
  - getStorefrontStopBySlug(slug) — single stop + its products
  - getStorefrontWholesaleSettings(slug) — public invoice/business info

Updated to use these actions instead of the shim:
  - src/app/tuxedo/page.tsx
  - src/app/tuxedo/stops/[slug]/page.tsx
  - src/app/tuxedo/contact/ContactClientPage.tsx
  - src/app/indian-river-direct/page.tsx
  - src/app/indian-river-direct/stops/[slug]/page.tsx

The shim file itself is still imported by other pages and API routes
that will be migrated in follow-up steps.

src/app/tuxedo/page.tsx

@@ -12,8 +12,8 @@ import StorefrontHeader from "@/components/storefront/StorefrontHeader";
 import StorefrontFooter from "@/components/storefront/StorefrontFooter";
 import BrandStylesProvider from "@/components/storefront/BrandStylesProvider";
 import { ScrollReveal, ParallaxLayer, FadeOnScroll } from "@/components/ui/ScrollAnimations";
-import { supabase } from "@/lib/supabase";
 import { getBrandSettingsPublic } from "@/actions/brand-settings";
+import { getStorefrontData } from "@/actions/storefront";
 import { gsap } from "gsap";
 import { ScrollTrigger } from "gsap/ScrollTrigger";
 
@@ -448,12 +448,12 @@ export default function TuxedoPage() {
     async function load() {
       const slug = "tuxedo";
 
-      const [brandResult, settingsResult] = await Promise.all([
-        supabase.from("brands").select("*").eq("slug", slug).single(),
+      const [storefront, settingsResult] = await Promise.all([
+        getStorefrontData(slug),
         getBrandSettingsPublic(slug),
       ]);
 
-      const brandData = brandResult.data as Brand | null;
+      const brandData = storefront.brand as Brand | null;
       setBrand(brandData);
 
       if (settingsResult.success && settingsResult.settings) {
@@ -484,12 +484,8 @@ export default function TuxedoPage() {
       }
 
       if (brandData?.id) {
-        const [{ data: stopsData }, { data: productsData }] = await Promise.all([
-          supabase.from("stops").select("*").eq("brand_id", brandData.id).eq("active", true) as unknown as { data: Stop[] | null },
-          supabase.from("products").select("*").eq("brand_id", brandData.id).eq("active", true) as unknown as { data: Product[] | null },
-        ]);
-        setStops(stopsData ?? []);
-        setProducts(productsData ?? []);
+        setStops(storefront.stops as unknown as Stop[]);
+        setProducts(storefront.products as unknown as Product[]);
       }
     }
     load();