admin page for category mappings. fixed some bugs and other tweaks

app/gunbuilder/page.tsx

@@ -30,6 +30,9 @@ const PART_ROLE_TO_CATEGORY: Record<string, CategoryId> = {
   "buffer-kit": "buffer" as CategoryId,
   "lower-parts-kit": "lowerParts" as CategoryId,
   sight: "sights" as CategoryId,
+  "lower-receiver": "lower" as CategoryId,
+  optic: "optic" as CategoryId,
+  stock: "stock" as CategoryId,
 };
 
 type BuildState = Partial<Record<CategoryId, string>>; // categoryId -> partId
@@ -177,7 +180,7 @@ export default function GunbuilderPage() {
               Shadow Standard
             </p>
             <h1 className="mt-1 text-2xl md:text-3xl font-semibold tracking-tight">
-              Gunbuilder <span className="text-amber-300">Prototype</span>
+              The Armory <span className="text-amber-300">Prototype</span>
             </h1>
             <p className="mt-2 text-sm text-zinc-400 max-w-xl">
               Choose one part per category to assemble an AR-15 build. Parts are
@@ -288,7 +291,7 @@ export default function GunbuilderPage() {
                     : ""
                 }`}
               >
-                Continue to Buy
+                Build Summary
               </Link>
               <button
                 type="button"