bug fixing

Frontend/erp-system/app/dashboard/receiving/grn/new/page.tsx

@@ -1,6 +1,6 @@
 "use client"
 
-import { useEffect, useMemo, useState } from "react"
+import { useEffect, useState } from "react"
 import { useRouter } from "next/navigation"
 import Link from "next/link"
 import { ArrowLeft, ExternalLink, Plus, RefreshCw, ShieldCheck, Trash2 } from "lucide-react"
@@ -265,17 +265,10 @@ export default function NewGrnPage() {
   // branch to pin to and the Admin must pick one explicitly for this GRN.
   const lockedBranchId = isAdmin ? activeBranchId : myBranchId
   const showBranchPicker = branchingEnabled && isAdmin && !lockedBranchId
+  // The branch this GRN is being raised for — no longer used to filter warehouses
+  // (warehouses are shared infrastructure across branches), only to scope the document itself.
   const effectiveBranchId = branchingEnabled ? (isAdmin ? (activeBranchId ?? branchFilterId) : myBranchId) : null
-  const visibleWarehouses = useMemo(
-    () => (effectiveBranchId === null ? (warehouses ?? []) : (warehouses ?? []).filter((w) => w.branchId === effectiveBranchId)),
-    [warehouses, effectiveBranchId]
-  )
-
-  // Switching branch can strip the currently-picked warehouse out of the visible set —
-  // clear it rather than silently submitting a warehouse from the previous branch.
-  useEffect(() => {
-    setWarehouseId((prev) => (prev !== null && !visibleWarehouses.some((w) => w.warehouseId === prev) ? null : prev))
-  }, [visibleWarehouses])
+  const visibleWarehouses = warehouses ?? []
 
   function switchMode(next: Mode) {
     setMode(next)
@@ -459,6 +452,10 @@ export default function NewGrnPage() {
       setHeaderError("Select a purchase order.")
       return
     }
+    if (branchingEnabled && !effectiveBranchId) {
+      setHeaderError("Select a branch for this GRN.")
+      return
+    }
     if (lines.length === 0) {
       setSubmitError("Add at least one line.")
       return
@@ -513,6 +510,7 @@ export default function NewGrnPage() {
         poId: mode === "po" ? poId : null,
         vendorId: mode === "direct" ? vendorId : null,
         warehouseId: warehouseId as number,
+        branchId: effectiveBranchId ?? 0,
         lines: payloadLines,
       })
       toast.success("GRN created", `${grn.docNo} is ready to confirm.`)