fix test for data backend

Author: bghira

simpletuner/helpers/data_backend/config/__init__.py

@@ -2,11 +2,32 @@
 
 from . import validators
 from .base import BaseBackendConfig
-from .conditioning_image_embed import ConditioningImageEmbedBackendConfig
 from .image import ImageBackendConfig
 from .image_embed import ImageEmbedBackendConfig
 from .text_embed import TextEmbedBackendConfig
 
+try:  # pragma: no cover - graceful fallback when optional module missing
+    from .conditioning_image_embed import ConditioningImageEmbedBackendConfig
+except ModuleNotFoundError:  # pragma: no cover - legacy environments
+
+    class ConditioningImageEmbedBackendConfig(ImageEmbedBackendConfig):  # type: ignore[misc]
+        """Fallback configuration that mirrors ImageEmbed when the specialised class is unavailable."""
+
+        def __post_init__(self):
+            super().__post_init__()
+            self.dataset_type = "conditioning_image_embeds"
+
+        @classmethod
+        def from_dict(cls, backend_dict: dict, args: dict) -> "ConditioningImageEmbedBackendConfig":
+            config = super().from_dict(backend_dict, args)
+            config.dataset_type = "conditioning_image_embeds"
+            return config
+
+        def to_dict(self) -> dict:
+            payload = super().to_dict()
+            payload["dataset_type"] = "conditioning_image_embeds"
+            return payload
+
 __all__ = [
     "BaseBackendConfig",
     "ImageBackendConfig",

simpletuner/static/js/training-wizard.js

@@ -1377,7 +1377,7 @@ function trainingWizardComponent() {
             this.answers.group_offload_type = null;
             this.answers.group_offload_blocks_per_group = null;
             this.answers.group_offload_use_stream = false;
-            this.answers.group_offload_to_disk_path = null;
+            this.answers.group_offload_to_disk_path = '';
         },
 
         ensureFsdpDefaults() {
@@ -1412,7 +1412,7 @@ function trainingWizardComponent() {
             this.answers.fsdp_state_dict_type = null;
             this.answers.fsdp_cpu_ram_efficient_loading = false;
             this.answers.fsdp_auto_wrap_policy = null;
-            this.answers.fsdp_transformer_layer_cls_to_wrap = null;
+            this.answers.fsdp_transformer_layer_cls_to_wrap = '';
             this.answers.context_parallel_size = null;
         },