feat: expose prefer_filename_for_name on bulk archive upload too

Maintainer review on #2610 flagged that upload-bulk would diverge from
upload if only the single-file route got the flag. Applies to every
file in the batch, same default-off behavior.

backend/app/api/routes/archives.py

@@ -3365,10 +3365,15 @@ async def upload_archive(
 async def upload_archives_bulk(
     files: list[UploadFile] = File(...),
     printer_id: int | None = None,
+    prefer_filename_for_name: bool = False,
     db: AsyncSession = Depends(get_db),
     current_user: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_CREATE),
 ):
-    """Bulk upload multiple 3MF files to archive."""
+    """Bulk upload multiple 3MF files to archive.
+
+    prefer_filename_for_name: applied to every file in the batch. See
+    upload_archive for details.
+    """
     from backend.app.api.routes.library import validate_print_file_upload
 
     results = []
@@ -3403,6 +3408,7 @@ async def upload_archives_bulk(
                 printer_id=printer_id,
                 source_file=temp_path,
                 created_by_id=current_user.id if current_user else None,
+                prefer_filename_for_name=prefer_filename_for_name,
             )
 
             if archive:

backend/tests/integration/test_archives_api.py

@@ -76,6 +76,59 @@ class TestArchivesAPI:
         kwargs = archive_print_mock.await_args.kwargs
         assert kwargs.get("prefer_filename_for_name") is False
 
+    @pytest.mark.asyncio
+    @pytest.mark.integration
+    @pytest.mark.parametrize("prefer_filename_for_name", [True, False])
+    async def test_upload_archives_bulk_forwards_prefer_filename_for_name(
+        self, async_client: AsyncClient, archive_factory, printer_factory, db_session, prefer_filename_for_name
+    ):
+        """POST /archives/upload-bulk must forward prefer_filename_for_name to
+        ArchiveService.archive_print for every file in the batch, keeping this
+        route consistent with the single-file /archives/upload endpoint."""
+        printer = await printer_factory()
+        archive = await archive_factory(printer.id, print_name="Mocked Return Archive")
+        archive_print_mock = AsyncMock(return_value=archive)
+
+        files = [
+            ("files", ("first.gcode.3mf", b"PK\x03\x04fake3mf", "application/octet-stream")),
+            ("files", ("second.gcode.3mf", b"PK\x03\x04fake3mf", "application/octet-stream")),
+        ]
+        params = {"prefer_filename_for_name": prefer_filename_for_name}
+
+        with patch(
+            "backend.app.api.routes.archives.ArchiveService.archive_print",
+            archive_print_mock,
+        ):
+            response = await async_client.post("/api/v1/archives/upload-bulk", files=files, params=params)
+
+        assert response.status_code == 200
+        assert archive_print_mock.await_count == 2
+        for call in archive_print_mock.await_args_list:
+            assert call.kwargs.get("prefer_filename_for_name") is prefer_filename_for_name
+
+    @pytest.mark.asyncio
+    @pytest.mark.integration
+    async def test_upload_archives_bulk_defaults_prefer_filename_for_name_false(
+        self, async_client: AsyncClient, archive_factory, printer_factory, db_session
+    ):
+        """Omitting the query param on the bulk route must not change existing
+        behavior for callers that predate this flag."""
+        printer = await printer_factory()
+        archive = await archive_factory(printer.id, print_name="Mocked Return Archive")
+        archive_print_mock = AsyncMock(return_value=archive)
+
+        files = [("files", ("existing-caller.gcode.3mf", b"PK\x03\x04fake3mf", "application/octet-stream"))]
+
+        with patch(
+            "backend.app.api.routes.archives.ArchiveService.archive_print",
+            archive_print_mock,
+        ):
+            response = await async_client.post("/api/v1/archives/upload-bulk", files=files)
+
+        assert response.status_code == 200
+        kwargs = archive_print_mock.await_args.kwargs
+        assert kwargs.get("prefer_filename_for_name") is False
+
     # ========================================================================
     # List endpoints
     # ========================================================================