Unify create-flow gutters, viewport height, and action-bar width so tablet and wide layouts stay aligned with step content.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/unit/flowSteps.test.ts

@@ -10,6 +10,7 @@ import {
   resolveCreateFlowBackTarget,
   shouldOfferCreateFlowSaveAndExit,
   isDirectTemplateReviewEntry,
+  createFlowStepUsesSelectSplitScroll,
   TEMPLATES_FACET_RECOMMEND_QUERY,
   TEMPLATES_FACET_RECOMMEND_VALUE,
   TEMPLATE_REVIEW_FROM_CREATE_FLOW_QUERY,
@@ -221,4 +222,14 @@ describe("flowSteps", () => {
     ).toBe(false);
     expect(isDirectTemplateReviewEntry(null)).toBe(false);
   });
+
+  it("uses split-column scroll for select, right-rail, and stakeholders", () => {
+    expect(createFlowStepUsesSelectSplitScroll("community-structure")).toBe(
+      true,
+    );
+    expect(createFlowStepUsesSelectSplitScroll("confirm-stakeholders")).toBe(
+      true,
+    );
+    expect(createFlowStepUsesSelectSplitScroll("community-name")).toBe(false);
+  });
 });