feat: add warehouse and bin management API with mock data implementation

- Implemented warehouses API with methods for listing, creating, and managing bins.
- Added wastage API to handle stock write-offs and integrate with stock adjustments.
- Created auth token management for storing and retrieving access tokens.
- Developed error mapping for consistent user-facing error messages.
- Introduced client-side validations for GRN, master data, and procurement processes.
- Defined common types for pagination, problem details, and various master data entities.
- Established procurement and stock management types to support frontend functionality.

Frontend/erp-system/components/receiving/status-badges.tsx

@@ -0,0 +1,34 @@
+import { Badge } from "@/components/ui/badge"
+import { GrnStatus, HoldStatus } from "@/types/grn"
+
+// Fixed width (not w-fit) so every status pill is the same size regardless of
+// label length ("Draft" vs "Confirmed" vs "Available").
+const badgeSize = "h-6 w-28 justify-center px-2.5 py-1 text-sm"
+
+function grnClass(status: GrnStatus) {
+  if (status === "Draft") return "bg-warning/10 text-warning border-transparent"
+  if (status === "Confirmed") return "bg-success/10 text-success border-transparent"
+  return "bg-destructive/10 text-destructive border-transparent" // Closed
+}
+
+export function GrnStatusBadge({ status }: { status: GrnStatus }) {
+  return (
+    <Badge variant="outline" className={`${badgeSize} ${grnClass(status)}`}>
+      {status}
+    </Badge>
+  )
+}
+
+function holdClass(status: HoldStatus) {
+  if (status === "OnHold") return "bg-warning/10 text-warning border-transparent"
+  if (status === "Rejected") return "bg-destructive/10 text-destructive border-transparent"
+  return "bg-success/10 text-success border-transparent" // Available
+}
+
+export function HoldStatusBadge({ status }: { status: HoldStatus }) {
+  return (
+    <Badge variant="outline" className={`${badgeSize} ${holdClass(status)}`}>
+      {status}
+    </Badge>
+  )
+}