fix

src/components/WorkflowCanvas.tsx

@@ -2776,23 +2776,6 @@ export function WorkflowCanvas() {
               </button>
             ) : undefined;
 
-            // Optional toggle for input nodes
-            const isInputNode = node.type === "audioInput";
-            const isOptional = !!(node.data as any)?.isOptional;
-            const optionalToggle = isInputNode ? (
-              <button
-                onClick={() => updateNodeData(node.id, { isOptional: !isOptional })}
-                className={`nodrag nopan text-[10px] py-0.5 px-1.5 rounded transition-colors ${
-                  isOptional
-                    ? "bg-amber-600/80 hover:bg-amber-500/80 text-white border border-amber-500/50"
-                    : "bg-neutral-700 hover:bg-neutral-600 border border-neutral-600 text-neutral-400"
-                }`}
-                title={isOptional ? t("node.optionalTitle") : t("node.markOptionalTitle")}
-              >
-                {isOptional ? t("common.optional") : t("common.required")}
-              </button>
-            ) : undefined;
-
             // Fallback shield button for generation nodes
             const isGenerationNode =
               node.type === "nanoBanana" ||
@@ -2871,7 +2854,6 @@ export function WorkflowCanvas() {
                     {fallbackButton}
                   </>
                 ) : undefined}
-                headerButtons={optionalToggle}
                 onCustomTitleChange={handleCustomTitleChange}
                 onCommentChange={handleCommentChange}
                 onRunNode={handleRunNode}