Extract row text field resolution

prompt_builder.py

@@ -812,6 +812,14 @@ def _format(template: str, context: dict[str, Any]) -> str:
     return row_rendering_policy.format_template(template, context)
 
 
+def _row_text_fields(
+    category: dict[str, Any],
+    subcategory: dict[str, Any],
+    item: Any,
+) -> row_rendering_policy.RowTextFields:
+    return row_rendering_policy.resolve_row_text_fields(category, subcategory, item)
+
+
 def _clean_prompt_punctuation(text: str) -> str:
     return row_expression_policy.clean_prompt_punctuation(text)
 
@@ -2269,18 +2277,7 @@ def _build_custom_row(
     position_key = str(action_route.get("position_key") or "")
     action_family = str(action_route.get("action_family") or "")
 
-    negative_prompt = str(_merged_field(category, subcategory, item, "negative_prompt", g.NEGATIVE_PROMPT))
-    positive_suffix = str(_merged_field(category, subcategory, item, "positive_suffix", GENERIC_POSITIVE_SUFFIX))
-    style = str(
-        _merged_field(
-            category,
-            subcategory,
-            item,
-            "style",
-            "sexy but tasteful adult pin-up coloured-pencil comic illustration",
-        )
-    )
-    item_label = str(_merged_field(category, subcategory, item, "item_label", category["name"]))
+    text_fields = _row_text_fields(category, subcategory, item)
 
     assembly_request = row_assembly_policy.CustomRowAssemblyRequest(
         row_number=row_number,
@@ -2295,10 +2292,10 @@ def _build_custom_row(
         item_axis_values=item_axis_values,
         item_template_metadata=item_template_metadata,
         formatter_hints=item_formatter_hints,
-        item_label=item_label,
-        style=style,
-        positive_suffix=positive_suffix,
-        negative_prompt=negative_prompt,
+        item_label=text_fields.item_label,
+        style=text_fields.style,
+        positive_suffix=text_fields.positive_suffix,
+        negative_prompt=text_fields.negative_prompt,
         scene_slug=scene_slug,
         scene=scene,
         pose=pose,