fix: add missing videoTrim case to executeWorkflow switch

Without this, videoTrim nodes were silently skipped during full
workflow execution (Cmd+Enter). The regenerateNode and
executeSelectedNodes paths already had it.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/store/workflowStore.ts

@@ -941,6 +941,9 @@ export const useWorkflowStore = create<WorkflowStore>((set, get) => ({
           case "easeCurve":
             await executeEaseCurve(executionCtx);
             break;
+          case "videoTrim":
+            await executeVideoTrim(executionCtx);
+            break;
           case "videoFrameGrab":
             await executeVideoFrameGrab(executionCtx);
             break;