fix(tests): fix 3 pre-existing test failures

- OutputNode download tests: add missing `ok: true` to fetch mock
  responses so downloadMedia doesn't bail at the `!response.ok` check
- workflowStore integration test: update easeCurve bounding box
  expectations from 480 to 280 to match actual default dimensions

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

src/components/__tests__/OutputNode.test.tsx

@@ -439,6 +439,7 @@ describe("OutputNode", () => {
     it("should fetch and download for URL-based content", async () => {
       const mockBlob = new Blob(["test"], { type: "image/png" });
       const mockFetch = vi.fn().mockResolvedValue({
+        ok: true,
         blob: () => Promise.resolve(mockBlob),
       });
       global.fetch = mockFetch;
@@ -501,6 +502,7 @@ describe("OutputNode", () => {
     it("should revoke blob URL after download for HTTP content", async () => {
       const mockBlob = new Blob(["test"], { type: "image/png" });
       global.fetch = vi.fn().mockResolvedValue({
+        ok: true,
         blob: () => Promise.resolve(mockBlob),
       });
 

src/store/__tests__/workflowStore.integration.test.ts

@@ -2474,7 +2474,7 @@ describe("workflowStore integration tests", () => {
 
   describe("Group operations with non-standard node types", () => {
     describe("createGroup bounding box calculation", () => {
-      it("should correctly calculate bounding box for easeCurve nodes (340x480)", () => {
+      it("should correctly calculate bounding box for easeCurve nodes (340x280)", () => {
         useWorkflowStore.setState({
           nodes: [
             createTestNode("ease-1", "easeCurve", {
@@ -2509,10 +2509,10 @@ describe("workflowStore integration tests", () => {
 
         expect(groupId).toBeTruthy();
         const group = useWorkflowStore.getState().groups[groupId];
-        // easeCurve is 340x480, so maxX = 500 + 340 = 840, maxY = 100 + 480 = 580
+        // easeCurve is 340x280, so maxX = 500 + 340 = 840, maxY = 100 + 280 = 380
         // With padding=20 and headerHeight=32: position.x = 100-20=80, width = 840-100+40=780
         expect(group.size.width).toBeGreaterThanOrEqual(740); // Must account for 340px wide nodes
-        expect(group.size.height).toBeGreaterThanOrEqual(480); // Must account for 480px tall nodes
+        expect(group.size.height).toBeGreaterThanOrEqual(280); // Must account for 280px tall nodes
       });
 
       it("should correctly calculate bounding box for videoStitch nodes (400x280)", () => {