feat: HVAC ductwork + DWV plumbing systems (#402)

Adds two new MEP node families (HVAC ductwork, DWV plumbing) built on a shared port-connectivity model. Co-authored by @sudhir9297.

apps/ifc-converter/components/IfcConverter.tsx

@@ -115,6 +115,7 @@ export default function IfcConverter() {
     return results
   }, [pascalData, searchQuery])
 
+  // biome-ignore lint/correctness/useExhaustiveDependencies: runs once on mount to load the initial file from the URL.
   useEffect(() => {
     const params = new URLSearchParams(window.location.search)
     const requested = params.get('file')
@@ -201,6 +202,7 @@ export default function IfcConverter() {
     }
   }
 
+  // biome-ignore lint/correctness/useExhaustiveDependencies: stable drop handler; handleFile only calls setState setters, so a mount-time capture stays correct.
   const handleDrop = useCallback((e: React.DragEvent) => {
     e.preventDefault()
     setIsDragging(false)
@@ -234,7 +236,7 @@ export default function IfcConverter() {
     const url = URL.createObjectURL(blob)
     const a = document.createElement('a')
     a.href = url
-    a.download = fileName.replace('.ifc', '') + '_pascal.json'
+    a.download = `${fileName.replace('.ifc', '')}_pascal.json`
     a.click()
     URL.revokeObjectURL(url)
   }

apps/ifc-converter/next-env.d.ts

@@ -1,6 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/types/routes.d.ts";
+import "./.next/dev/types/routes.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.