Improve accumulator preview interactions

loop_nodes.py

@@ -238,17 +238,20 @@ def _accumulator_status(key: str, store: list[dict[str, Any]]) -> str:
     return f"key={key}; entries={len(store)}; image_entries={len(images)}; formats={shape_text}"
 
 
-def accumulator_list_entries(store_key: str) -> dict[str, Any]:
+def accumulator_list_entries(store_key: str, preview_limit: int = 0) -> 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, [])
-    return {
+    result = {
         "store_key": key,
         "entries": _entry_infos(store),
         "count": len(store),
         "status": _accumulator_status(key, store),
     }
+    if int(preview_limit) > 0:
+        result["images"] = _preview_image_results(store, preview_limit, None, None)
+    return result
 
 
 def accumulator_delete_entries(
@@ -256,6 +259,7 @@ def accumulator_delete_entries(
     entry_id: str = "",
     index: int = 0,
     clear: bool = False,
+    preview_limit: int = 0,
 ) -> dict[str, Any]:
     key = str(store_key or "").strip()
     if not key:
@@ -278,7 +282,7 @@ def accumulator_delete_entries(
                 removed = 1
         else:
             raise ValueError("entry_id or 1-based index is required")
-    result = accumulator_list_entries(key)
+    result = accumulator_list_entries(key, preview_limit=preview_limit)
     result["removed"] = removed
     return result
 
@@ -288,13 +292,15 @@ def accumulator_move_entry(
     entry_id: str = "",
     index: int = 0,
     direction: str = "up",
+    target_index: int = 0,
+    preview_limit: int = 0,
 ) -> 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 = accumulator_list_entries(key, preview_limit=preview_limit)
         result["moved"] = False
         return result
     zero_index = -1
@@ -311,26 +317,33 @@ def accumulator_move_entry(
     else:
         raise ValueError("entry_id or 1-based index is required")
     if zero_index < 0:
-        result = accumulator_list_entries(key)
+        result = accumulator_list_entries(key, preview_limit=preview_limit)
         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:
+    requested_target = int(target_index)
+    if requested_target > 0:
         entry = store.pop(zero_index)
-        store.insert(target_index, entry)
-    result = accumulator_list_entries(key)
+        target_zero_index = max(0, min(len(store), requested_target - 1))
+        store.insert(target_zero_index, entry)
+        moved = target_zero_index != zero_index
+    else:
+        direction = str(direction or "up").strip().lower()
+        if direction == "top":
+            target_zero_index = 0
+        elif direction == "bottom":
+            target_zero_index = len(store) - 1
+        elif direction == "down":
+            target_zero_index = min(len(store) - 1, zero_index + 1)
+        else:
+            target_zero_index = max(0, zero_index - 1)
+        moved = target_zero_index != zero_index
+        if moved:
+            entry = store.pop(zero_index)
+            store.insert(target_zero_index, entry)
+    result = accumulator_list_entries(key, preview_limit=preview_limit)
     result["moved"] = moved
     result["from_index"] = zero_index + 1
-    result["to_index"] = target_index + 1
+    result["to_index"] = target_zero_index + 1
     return result