新增 WaitForNode 類別以控制工作流結果完成順序，新增範例圖片、範例工作流

__init__.py

@@ -4,6 +4,7 @@ from .loader_node import DynamicTagLoaderJS
 from .saver_node import DynamicTagSaver
 from .iterator_node import DynamicTagIterator
 from .image_info_node import ImageWorkflowExtractor
+from .wait_for_node import WaitForNode
 
 # ==============================================================================
 # 模組導入與環境檢查
@@ -77,6 +78,7 @@ NODE_CLASS_MAPPINGS = {
     "DynamicTagSaver": DynamicTagSaver,
     "DynamicTagIterator": DynamicTagIterator,
     "WorkflowMetadataReader": ImageWorkflowExtractor,
+    "WaitForNode": WaitForNode,
 }
 
 NODE_DISPLAY_NAME_MAPPINGS = {
@@ -84,6 +86,7 @@ NODE_DISPLAY_NAME_MAPPINGS = {
     "DynamicTagSaver": "💾 Dynamic Tag Saver",
     "DynamicTagIterator": "🔄 Dynamic Tag Iterator",
     "WorkflowMetadataReader": "🔍 Workflow Metadata Reader",
+    "WaitForNode": "⏳ Wait For",
 }
 
 WEB_DIRECTORY = "./web"

wait_for_node.py

@@ -0,0 +1,32 @@
+class AnyType(str):
+    def __ne__(self, __value: object) -> bool:
+        return False
+
+any_type = AnyType("*")
+
+class WaitForNode:
+    """
+    強迫工作流等待特定節點執行完畢。
+    用於控制 ComfyUI 執行的完成順序。
+    """
+    def __init__(self):
+        pass
+
+    @classmethod
+    def INPUT_TYPES(s):
+        return {
+            "required": {
+                "data_input": (any_type,),  # 主要流轉的數據
+            },
+            "optional": {
+                "wait_for": (any_type,),    # 必須先完成的目標
+            }
+        }
+
+    RETURN_TYPES = (any_type,)
+    RETURN_NAMES = ("data_output",)
+    FUNCTION = "execute_wait"
+    CATEGORY = "DynamicTag/FlowControl"
+
+    def execute_wait(self, data_input, wait_for=None):
+        return (data_input,)