it_manager/locations: редактор шаблона этикеток, раздельная печать QR/EAN и карточка поставщика.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/locations/views.py

@@ -165,6 +165,34 @@ def pharmacy_update_view(request, pk):
     return render_page(request, 'pharmacy-detail.html', context)
 
 
+def _vendor_detail_context(request, vendor, *, form=None, edit_mode=False,
+                           form_message=None, form_error=None):
+    can_edit = user_can_manage_vendors(request.user)
+    if edit_mode and can_edit and form is None:
+        form = PortalVendorForm(instance=vendor)
+    return {
+        'vendor': vendor,
+        'can_edit_vendor': can_edit,
+        'vendor_edit_mode': bool(edit_mode and can_edit),
+        'vendor_edit_form': form if (edit_mode and can_edit) else None,
+        'vendor_form_message': form_message,
+        'vendor_form_error': form_error,
+    }
+
+
+@login_required
+def vendor_detail_view(request, pk):
+    vendor = get_object_or_404(
+        Location.objects.select_related('location_region'),
+        pk=pk, location_type='vendor',
+    )
+    edit_mode = request.GET.get('edit') == '1'
+    if edit_mode and not user_can_manage_vendors(request.user):
+        return HttpResponseForbidden()
+    context = _vendor_detail_context(request, vendor, edit_mode=edit_mode)
+    return render_page(request, 'vendor-detail.html', context)
+
+
 @login_required
 @require_POST
 def vendor_create_view(request):
@@ -188,9 +216,22 @@ def vendor_update_view(request, pk):
 
     vendor = get_object_or_404(Location, pk=pk, location_type='vendor')
     form = PortalVendorForm(request.POST, instance=vendor)
+    # Если пришли с карточки — остаёмся на ней
+    from_card = request.POST.get('from_card') == '1'
     if form.is_valid():
-        form.save()
+        vendor = form.save()
+        if from_card:
+            context = _vendor_detail_context(
+                request, vendor, form_message='Изменения сохранены.',
+            )
+            return render_page(request, 'vendor-detail.html', context)
         return _dislocation_vendors_response(request, message='Изменения сохранены.')
+    if from_card:
+        context = _vendor_detail_context(
+            request, vendor, form=form, edit_mode=True,
+            form_error=_vendor_form_errors(form),
+        )
+        return render_page(request, 'vendor-detail.html', context)
     return _dislocation_vendors_response(
         request, error=_vendor_form_errors(form), form=form,
     )