fix(backoffice): scope copy-permissions-from to the selected unit (EDRFREIGHT-308)

The "Copy Permissions From" dropdown in the position-type form only
filtered candidates by the selected organization's full unit set,
ignoring the form's own "Select Unit" field entirely — so switching
units never re-scoped the list, unlike the equivalent unit filter on
the position-management table.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/edr-freight-web/backoffice/src/locales/am/translation.json

@@ -2653,6 +2653,7 @@
     "copyPermissionsHint": "የነበረ የቦታ አይነት ይምረጡ፤ ፍቃዶቹ አስቀድመው ይሞላሉ፣ ከታች ማስተካከል ይችላሉ።",
     "copyPermissionsFailed": "ፍቃዶችን መቅዳት አልተቻለም",
     "selectOrganizationToCopy": "መቅዳት የሚችሏቸውን የቦታ ዓይነቶች ለማየት መጀመሪያ ድርጅት ይምረጡ",
+    "selectUnitToCopy": "መቅዳት የሚችሏቸውን የቦታ ዓይነቶች ለማየት መጀመሪያ ክፍል ይምረጡ",
     "cannotClearAllPermissions": "ተቀምጧል። ፍቃዶቹ አልተቀየሩም — ይህ የቦታ ዓይነት ቢያንስ አንድ ፍቃድ ሊኖረው ይገባል።",
     "permissionsSelected": "{{count}} ተመርጠዋል",
     "positionTypeCreated": "የቦታ ዓይነት ተፈጥሯል",

apps/edr-freight-web/backoffice/src/locales/en/translation.json

@@ -2762,6 +2762,7 @@
     "copyPermissionsHint": "Pick an existing position type to pre-fill its permissions, then edit below.",
     "copyPermissionsFailed": "Failed to copy permissions",
     "selectOrganizationToCopy": "Select an organization to see the position types you can copy from",
+    "selectUnitToCopy": "Select a unit to see the position types you can copy from",
     "cannotClearAllPermissions": "Saved. Permissions were left unchanged — this position type must keep at least one permission.",
     "permissionsSelected": "{{count}} selected",
     "positionTypeCreated": "Position type created",

apps/edr-freight-web/backoffice/src/locales/fr/translation.json

@@ -1888,6 +1888,7 @@
     "copyPermissionsHint": "Choisissez un type de poste existant pour préremplir ses autorisations, puis modifiez ci-dessous.",
     "copyPermissionsFailed": "Échec de la copie des autorisations",
     "selectOrganizationToCopy": "Sélectionnez une organisation pour voir les types de poste que vous pouvez copier",
+    "selectUnitToCopy": "Sélectionnez une unité pour voir les types de poste que vous pouvez copier",
     "cannotClearAllPermissions": "Enregistré. Les autorisations n'ont pas été modifiées — ce type de poste doit conserver au moins une autorisation.",
     "permissionsSelected": "{{count}} sélectionné(s)",
     "positionTypeCreated": "Type de poste créé",

apps/edr-freight-web/backoffice/src/user-management/components/position-management/CreatePositionForm.tsx

@@ -115,6 +115,7 @@ export const CreatePositionForm = ({
   });
 
   const selectedOrganizationId = form.watch("organizationId");
+  const selectedUnitId = form.watch("unitId");
 
   const { organizationsResponse, isLoading: isLoadingOrgs } = useOrganizations(
     "Org",
@@ -163,36 +164,32 @@ export const CreatePositionForm = ({
     enabled: mode === "edit" && !!positionTypeId,
   });
 
-  // A position type belongs to a unit, and a unit to an organization — IAM has
-  // no organizationId on the type itself and no organization-scoped route, so
-  // the picked org narrows the list through its units. isSystem types are the
-  // shared "commons" and stay available to every organization.
-  const orgUnitIds = useMemo(
-    () =>
-      new Set(
-        (unitsResponse?.data?.items ?? []).map((unit: UnitDto) => unit.id),
-      ),
-    [unitsResponse],
-  );
-
+  // A position type belongs to a single unit — scope copy sources to the
+  // selected unit, same as the "Select Unit" filter on the position list page.
+  // isSystem types are the shared "commons" and stay available everywhere.
   const copyFromOptions = useMemo(() => {
-    if (!selectedOrganizationId) return [];
+    if (!selectedUnitId) return [];
     return positionTypes.filter(
       (type: PositionTypeDto) =>
         type.id !== positionTypeId &&
-        (type.isSystem || (!!type.unitId && orgUnitIds.has(type.unitId))),
+        (type.isSystem || type.unitId === selectedUnitId),
     );
-  }, [positionTypes, orgUnitIds, selectedOrganizationId, positionTypeId]);
+  }, [positionTypes, selectedUnitId, positionTypeId]);
 
   // Reset the selected unit when the organization changes so a unit from a
-  // different org can't be submitted by mistake. The copy source is cleared
-  // too — it is scoped to the old organization.
+  // different org can't be submitted by mistake.
   useEffect(() => {
     if (mode === "edit") return;
     form.setValue("unitId", "");
-    setCopyFromPositionId("");
   }, [selectedOrganizationId, mode, form]);
 
+  // The copy source is scoped to the selected unit — clear it whenever the
+  // unit changes (including as a side effect of the org reset above) so a
+  // stale selection from a different unit can't be submitted.
+  useEffect(() => {
+    setCopyFromPositionId("");
+  }, [selectedUnitId]);
+
   useEffect(() => {
     if (mode !== "edit" || !initialValues || !positionTypeId) return;
     if (hasLoadedEditData.current) return;
@@ -335,11 +332,13 @@ export const CreatePositionForm = ({
 
   const copyFromPlaceholder = !selectedOrganizationId
     ? t("contentManagement.selectOrganizationToCopy")
-    : isCopying || isLoadingPositionTypes || isLoadingUnits
-      ? t("common.loading")
-      : isErrorPositionTypes
-        ? t("contentManagement.failedToLoadPositionTypes")
-        : t("contentManagement.selectPositionToCopy");
+    : !selectedUnitId
+      ? t("contentManagement.selectUnitToCopy")
+      : isCopying || isLoadingPositionTypes || isLoadingUnits
+        ? t("common.loading")
+        : isErrorPositionTypes
+          ? t("contentManagement.failedToLoadPositionTypes")
+          : t("contentManagement.selectPositionToCopy");
 
   return (
     <Form {...form}>
@@ -454,6 +453,7 @@ export const CreatePositionForm = ({
             onValueChange={handleCopyFrom}
             disabled={
               !selectedOrganizationId ||
+              !selectedUnitId ||
               isLoadingPositionTypes ||
               isLoadingUnits ||
               isCopying