fixed build issues. its builds now

lib/buildOverlaps.ts

@@ -1,5 +1,7 @@
 // /lib/buildOverlaps.ts
-import type { CategoryId } from "@/types/builderSlots";
+import type { BuilderSlotKey } from "@/types/builderSlots";
+
+type CategoryId = BuilderSlotKey;
 
 export type OverlapChipModel = {
   key: string;
@@ -25,10 +27,10 @@ export const UPPER_OVERLAP_CATEGORIES = new Set<CategoryId>([
 
 export const LOWER_OVERLAP_CATEGORIES = new Set<CategoryId>([
   "lower-receiver",
-  "lower-parts",
+  "lower-parts-kit",
   "trigger",
   "grip",
-  "safety",
+  "safety-selector",
   "buffer",
   "stock",
 ]);

lib/catalogMappings.ts

@@ -41,7 +41,7 @@ export const CATEGORY_TO_PART_ROLES: Partial<Record<BuilderSlotKey, string[]>> =
   "lower-parts-kit": ["lower-parts-kit", "lower-parts"],
   trigger: ["trigger", "trigger-kit"],
   grip: ["pistol-grip", "grip"],
-  safety: ["safety", "safety-selector"],
+  "safety-selector": ["safety", "safety-selector"],
   buffer: ["buffer-kit", "buffer"],
   stock: ["stock"],