feat: implement 20ft container weight-pairing validation

- Added ContainerValidationService to handle 20ft weight-pairing logic.
- Introduced validate20ftWeightPairing utility function to check weight differences.
- Updated BookingPricingService to include overweight line details and pairing errors in price response.
- Enhanced BookingTransitionService to reject submissions with unpairable 20ft containers.
- Created ShipmentValidation interface for pre-submit validation of container contracts.
- Integrated shipment validation into the contract booking process, providing warnings for overweight containers and hard blocks for pairing errors.
- Updated front-end components to display validation results and prevent submission when errors are present.

apps/edr-freight-web/backoffice/src/App.tsx

@@ -61,7 +61,13 @@ import UserManagementHostPage from "./pages/dashboard/user-management/UserManage
 import PaymentsPage from "./pages/payments/PaymentsPage";
 //import EmployeesPage from "./pages/dashboard/user-management/EmployeesPage";
 import { RequirePermission } from "./components/auth/RequirePermission";
-import { FREIGHT_PERMS, hasPermission as hasFreightPermission } from "./lib/permissions";
+import {
+  FREIGHT_PERMS,
+  hasPermission as hasFreightPermission,
+  isDjiboutiGl,
+  isEthiopianGl,
+  isSuperAdmin,
+} from "./lib/permissions";
 import PermissionsPage from "./pages/dashboard/user-management/PermissionsPage";
 import PositionTypesPage from "./pages/dashboard/user-management/PositionTypesPage";
 import RolesPage from "./pages/dashboard/user-management/RolesPage";
@@ -435,12 +441,35 @@ const buildSidebarSections = (demoItems: SidebarItem[]): SidebarSection[] => [
   },
 ];
 
-/** Keep only items the user is permitted to see; drop now-empty sections. */
+/** Hrefs of the two document-clearance menu items (stable identifiers). */
+const ET_CLEARANCE_HREF = "/dashboard/contracts/clearance";
+const DJ_CLEARANCE_HREF = "/dashboard/gl-djibouti/clearance";
+
+const isEtClearanceItem = (item: SidebarItem): boolean =>
+  item.href === ET_CLEARANCE_HREF;
+const isDjClearanceItem = (item: SidebarItem): boolean =>
+  item.href === DJ_CLEARANCE_HREF;
+const isClearanceItem = (item: SidebarItem): boolean =>
+  isEtClearanceItem(item) || isDjClearanceItem(item);
+
+/**
+ * Keep only items the user is permitted to see; drop now-empty sections.
+ *
+ * Position-scoped visibility (super_admin bypasses all of this):
+ * - Ethiopian GL  → sees ONLY the ET document-clearance page.
+ * - Djibouti GL   → sees ONLY the DJ clearance page.
+ * - Everyone else → sees everything they have permission for, EXCEPT the two
+ *   clearance pages (those are GL-only).
+ */
 const filterSidebarByPermission = (
   sections: SidebarSection[],
   user: ReturnType<typeof useAuth>["user"],
 ): SidebarSection[] => {
-  const itemAllowed = (item: SidebarItem): boolean => {
+  const superAdmin = isSuperAdmin(user);
+  const etGl = !superAdmin && isEthiopianGl(user);
+  const djGl = !superAdmin && isDjiboutiGl(user);
+
+  const permissionAllowed = (item: SidebarItem): boolean => {
     if (!item.permission) return true;
     const keys = Array.isArray(item.permission)
       ? item.permission
@@ -448,6 +477,19 @@ const filterSidebarByPermission = (
     return keys.some((key) => hasFreightPermission(user, key));
   };
 
+  const itemAllowed = (item: SidebarItem): boolean => {
+    if (superAdmin) return true;
+
+    // GL positions are locked to their single clearance page.
+    if (etGl) return isEtClearanceItem(item);
+    if (djGl) return isDjClearanceItem(item);
+
+    // Everyone else: hide the GL-only clearance pages entirely.
+    if (isClearanceItem(item)) return false;
+
+    return permissionAllowed(item);
+  };
+
   return sections
     .map((section) => ({
       ...section,
@@ -469,6 +511,22 @@ const DashboardShell = () => {
   );
   const displayName = user?.name?.en || user?.username || user?.email || "User";
 
+  // GL positions are locked to their single clearance page: if they navigate
+  // (or deep-link) anywhere else, send them back to their clearance hub.
+  // Super admin is exempt. Allow the clearance path + its detail sub-routes.
+  const superAdmin = isSuperAdmin(user);
+  const glClearanceHome = !superAdmin
+    ? isEthiopianGl(user)
+      ? ET_CLEARANCE_HREF
+      : isDjiboutiGl(user)
+        ? DJ_CLEARANCE_HREF
+        : null
+    : null;
+
+  if (glClearanceHome && !location.pathname.startsWith(glClearanceHome)) {
+    return <Navigate to={glClearanceHome} replace />;
+  }
+
   return (
     <FreightDashboardLayout
       sidebarSections={sidebarSections}