Add accumulator preview reordering

loop_nodes.py

@@ -283,6 +283,57 @@ def accumulator_delete_entries(
     return result
 
 
+def accumulator_move_entry(
+    store_key: str,
+    entry_id: str = "",
+    index: int = 0,
+    direction: str = "up",
+) -> dict[str, Any]:
+    key = str(store_key or "").strip()
+    if not key:
+        raise ValueError("store_key is required for accumulator preview actions")
+    store = _ACCUMULATOR_STORES.setdefault(key, [])
+    if not store:
+        result = accumulator_list_entries(key)
+        result["moved"] = False
+        return result
+    zero_index = -1
+    entry_id = str(entry_id or "").strip()
+    if entry_id:
+        for current_index, entry in enumerate(store):
+            if str(entry.get("id") or "") == entry_id:
+                zero_index = current_index
+                break
+    elif int(index) > 0:
+        candidate = int(index) - 1
+        if candidate < len(store):
+            zero_index = candidate
+    else:
+        raise ValueError("entry_id or 1-based index is required")
+    if zero_index < 0:
+        result = accumulator_list_entries(key)
+        result["moved"] = False
+        return result
+    direction = str(direction or "up").strip().lower()
+    if direction == "top":
+        target_index = 0
+    elif direction == "bottom":
+        target_index = len(store) - 1
+    elif direction == "down":
+        target_index = min(len(store) - 1, zero_index + 1)
+    else:
+        target_index = max(0, zero_index - 1)
+    moved = target_index != zero_index
+    if moved:
+        entry = store.pop(zero_index)
+        store.insert(target_index, entry)
+    result = accumulator_list_entries(key)
+    result["moved"] = moved
+    result["from_index"] = zero_index + 1
+    result["to_index"] = target_index + 1
+    return result
+
+
 def _require_image_saving() -> None:
     if folder_paths is None or np is None or Image is None:
         raise RuntimeError("Image preview/save helpers require ComfyUI image dependencies.")