fix: pass outputDuration through parent-child ease curve connections

The easeCurve settings handle propagated bezierHandles and easingPreset
but omitted outputDuration, so children always used their local duration
instead of the parent's.

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

src/store/execution/__tests__/videoProcessingExecutors.test.ts

@@ -219,6 +219,7 @@ describe("executeEaseCurve", () => {
         easeCurve: {
           bezierHandles: [0.42, 0, 0.58, 1],
           easingPreset: "ease-in-out",
+          outputDuration: 10,
         },
       }),
       getEdges: vi.fn().mockReturnValue([
@@ -232,6 +233,7 @@ describe("executeEaseCurve", () => {
     expect(ctx.updateNodeData).toHaveBeenCalledWith("ec-1", expect.objectContaining({
       bezierHandles: [0.42, 0, 0.58, 1],
       easingPreset: "ease-in-out",
+      outputDuration: 10,
       inheritedFrom: "parent-ec",
     }));
   });

src/store/execution/videoProcessingExecutors.ts

@@ -235,9 +235,11 @@ export async function executeEaseCurve(ctx: NodeExecutionContext): Promise<void>
     // Propagate parent easeCurve settings if inherited
     let activeBezierHandles = nodeData.bezierHandles;
     let activeEasingPreset = nodeData.easingPreset;
+    let activeOutputDuration = nodeData.outputDuration;
     if (inputs.easeCurve) {
       activeBezierHandles = inputs.easeCurve.bezierHandles;
       activeEasingPreset = inputs.easeCurve.easingPreset;
+      activeOutputDuration = inputs.easeCurve.outputDuration;
       const edges = getEdges();
       const easeCurveSourceId =
         edges.filter(
@@ -246,6 +248,7 @@ export async function executeEaseCurve(ctx: NodeExecutionContext): Promise<void>
       updateNodeData(node.id, {
         bezierHandles: activeBezierHandles,
         easingPreset: activeEasingPreset,
+        outputDuration: activeOutputDuration,
         inheritedFrom: easeCurveSourceId,
       });
     }
@@ -295,7 +298,7 @@ export async function executeEaseCurve(ctx: NodeExecutionContext): Promise<void>
     const outputBlob = await applySpeedCurveAsync(
       videoBlob,
       videoDuration,
-      nodeData.outputDuration,
+      activeOutputDuration,
       (progress) => {
         updateNodeData(node.id, { progress: progress.progress });
       },

src/store/utils/__tests__/connectedInputs.test.ts

@@ -255,6 +255,7 @@ describe("getConnectedInputsPure", () => {
       makeNode("ec", "easeCurve", {
         bezierHandles: [0.25, 0.1, 0.25, 1.0],
         easingPreset: "ease-in-out",
+        outputDuration: 8,
         outputVideo: null,
       }),
       makeNode("vs", "videoStitch"),
@@ -270,6 +271,7 @@ describe("getConnectedInputsPure", () => {
     expect(result.easeCurve).toEqual({
       bezierHandles: [0.25, 0.1, 0.25, 1.0],
       easingPreset: "ease-in-out",
+      outputDuration: 8,
     });
   });
 

src/store/utils/connectedInputs.ts

@@ -39,7 +39,7 @@ export interface ConnectedInputs {
   model3d: string | null;
   text: string | null;
   dynamicInputs: Record<string, string | string[]>;
-  easeCurve: { bezierHandles: [number, number, number, number]; easingPreset: string | null } | null;
+  easeCurve: { bezierHandles: [number, number, number, number]; easingPreset: string | null; outputDuration: number } | null;
 }
 
 /**
@@ -308,6 +308,7 @@ export function getConnectedInputsPure(
         easeCurve = {
           bezierHandles: sourceData.bezierHandles,
           easingPreset: sourceData.easingPreset,
+          outputDuration: sourceData.outputDuration,
         };
       }
     }