Refactor: move public storefront stop data to server-side + parallel agent work

Server-side / caching refactor (Grok):
- New RPC get_public_stops_for_brand (migration 148) for public storefront stops
- New server action getPublicStopsForBrand with revalidate=300 + tags
- Add revalidateTag invalidation to createStopsBatch + publishStop
- Convert /tuxedo/stops and /indian-river-direct/stops to Server Components
- Extract TuxedoStopsList + IndianRiverStopsList as client islands (GSAP only)
- Removes supabase-js from browser bundle on those routes
- Both pages now statically prerendered (5m ISR)

Parallel agent changes also staged:
- AI provider model list refresh (claude-sonnet-4-5, etc.)
- ESLint directive patches for react-hooks/set-state-in-effect
- Admin + storefront + checkout + cart updates
- New admin_create_stop_rpcs migration (147)
- Misc fixes across ~90 files

Build verified: typecheck clean, lint clean on new files, production build succeeds.

src/app/admin/products/[id]/page.tsx

@@ -3,6 +3,7 @@ import ProductEditForm from "@/components/admin/ProductEditForm";
 import { getAdminUser } from "@/lib/admin-permissions";
 import AdminAccessDenied from "@/components/admin/AdminAccessDenied";
 import { redirect } from "next/navigation";
+import Link from "next/link";
 
 type ProductDetailPageProps = {
   params: Promise<{
@@ -36,12 +37,12 @@ export default async function ProductDetailPage({ params }: ProductDetailPagePro
           <pre className="mt-4 rounded-xl bg-white p-4 text-sm text-stone-600">
             {error?.message ?? "Product not found"}
           </pre>
-          <a
+          <Link
             href="/admin/products"
             className="mt-4 inline-block text-stone-500 hover:text-stone-700"
           >
             ← Back to Products
-          </a>
+          </Link>
         </div>
       </main>
     );
@@ -50,12 +51,12 @@ export default async function ProductDetailPage({ params }: ProductDetailPagePro
   return (
     <main className="min-h-screen px-6 py-12" style={{ backgroundColor: "var(--admin-bg)" }}>
       <div className="mx-auto max-w-4xl">
-        <a
+        <Link
           href="/admin/products"
           className="text-sm text-stone-500 hover:text-stone-700"
         >
           ← Back to Products
-        </a>
+        </Link>
 
         <div className="mt-6 rounded-2xl bg-white p-8 shadow-xl shadow-stone-200/50">
           <div className="flex items-start justify-between">

src/app/admin/products/new/page.tsx

@@ -1,20 +1,33 @@
 import { getAdminUser } from "@/lib/admin-permissions";
 import NewProductForm from "@/components/admin/NewProductForm";
+import { getBrands } from "@/actions/admin/users";
 import { redirect } from "next/navigation";
+import Link from "next/link";
 
 export default async function NewProductPage() {
   const adminUser = await getAdminUser();
   if (!adminUser?.can_manage_products) redirect("/admin/pickup");
+
+  // Resolve brand from the signed-in admin. For brand_admin / store_employee
+  // this is their assigned brand. For platform_admin (brand_id === null) we
+  // fetch the full brand list so they can choose.
+  const isPlatformAdmin = !adminUser.brand_id;
+  let brands: { id: string; name: string }[] = [];
+  if (isPlatformAdmin) {
+    const result = await getBrands();
+    brands = result.brands ?? [];
+  }
+
   return (
     <main className="min-h-screen px-6 py-12" style={{ backgroundColor: "var(--admin-bg)" }}>
       <div className="mx-auto max-w-4xl">
         <div className="mb-8">
-          <a
+          <Link
             href="/admin/products"
             className="text-sm text-stone-500 hover:text-stone-700"
           >
             ← Back to Products
-          </a>
+          </Link>
         </div>
 
         <div className="rounded-2xl bg-white p-8 shadow-xl shadow-stone-200/50">
@@ -23,10 +36,16 @@ export default async function NewProductPage() {
           </h1>
 
           <p className="mt-2 text-stone-500">
-            Add a new product for Tuxedo Corn or Indian River Direct.
+            {isPlatformAdmin
+              ? "Add a new product to any brand you administer."
+              : "Add a new product to your brand's catalog."}
           </p>
 
-          <NewProductForm />
+          <NewProductForm
+            defaultBrandId={adminUser.brand_id ?? ""}
+            brands={brands}
+            lockBrand={!isPlatformAdmin}
+          />
         </div>
       </div>
     </main>