refactor: consolidate authoring binding copies

web/apps/console/src/workspace/authoring/useDraftAuthoring.ts

@@ -2,6 +2,7 @@ import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { useConsoleWorkspace } from "../context.js";
 import {
   createDraftAuthoringClient,
+  copyInputBinding,
   copyStepInputBinding,
   type DraftAuthoringClient,
 } from "../domain/draft-authoring-client.js";
@@ -193,26 +194,7 @@ const copyOutputBindings = (
 
 const copyWorkflowOutputBindings = (
   bindings: ReadonlyArray<InputBinding>,
-): ReadonlyArray<InputBinding> => bindings.map((binding) => (
-  "path" in binding
-    ? {
-        path:
-          typeof binding.path === "string"
-            ? binding.path
-            : { root: binding.path.root, parts: [...binding.path.parts] },
-        target:
-          typeof binding.target === "string"
-            ? binding.target
-            : { root: binding.target.root, parts: [...binding.target.parts] },
-      }
-    : {
-        value: copyJson(binding.value),
-        target:
-          typeof binding.target === "string"
-            ? binding.target
-            : { root: binding.target.root, parts: [...binding.target.parts] },
-      }
-));
+): ReadonlyArray<InputBinding> => bindings.map(copyInputBinding);
 
 const copyContractPatch = (patch: WorkflowContractPatch): WorkflowContractPatch => ({
   ...(patch.inputSchema !== undefined

web/apps/console/src/workspace/domain/draft-authoring-client.test.ts

@@ -18,7 +18,7 @@ import {
   type SetWorkflowStartInput,
   type UpdateCapabilityStepInput,
 } from "./draft-workspace-models.js";
-import { createDraftAuthoringClient } from "./draft-authoring-client.js";
+import { copyInputBinding, createDraftAuthoringClient } from "./draft-authoring-client.js";
 import type { ConsoleWriteExecutor } from "./write-executor.js";
 
 const canonicalWorkspace = {
@@ -65,6 +65,19 @@ const createExecutor = () => {
 };
 
 describe("DraftAuthoringClient", () => {
+  it("copies workflow-compatible input bindings without sharing nested paths", () => {
+    const binding = {
+      path: { root: "state" as const, parts: ["report"] },
+      target: { root: "local" as const, parts: ["text"] },
+    } satisfies InputBinding;
+
+    const copied = copyInputBinding(binding);
+    expect(copied).not.toBe(binding);
+    if (!("path" in copied)) throw new Error("expected a path binding");
+    expect(copied.path).not.toBe(binding.path);
+    expect(copied.target).not.toBe(binding.target);
+  });
+
   it("lowers all six authoring operations and decodes canonical workspaces", async () => {
     const { executor: writeExecutor, run } = createExecutor();
     const client = createDraftAuthoringClient(writeExecutor);

web/apps/console/src/workspace/domain/draft-authoring-client.ts

@@ -5,6 +5,7 @@ import {
   type CreateEmptyDraftInput,
   type CreateFromCapabilityInput,
   type DraftWorkspace,
+  type InputBinding,
   type JsonValue,
   type InputExpression,
   type InputPath,
@@ -112,27 +113,31 @@ export const copyInputExpression = (
   }
 };
 
-export const copyStepInputBinding = (
-  binding: StepInputBinding,
-): StepInputBinding => {
+export const copyInputBinding = (binding: InputBinding): InputBinding => {
   if ("path" in binding) {
     return {
       path: copyInputPath(binding.path),
       target: copyLocalInputPath(binding.target),
     };
   }
-  if ("value" in binding) {
-    return {
-      target: copyLocalInputPath(binding.target),
-      value: copyJsonValue(binding.value),
-    };
-  }
   return {
     target: copyLocalInputPath(binding.target),
-    expression: copyInputExpression(binding.expression),
+    value: copyJsonValue(binding.value),
   };
 };
 
+export const copyStepInputBinding = (
+  binding: StepInputBinding,
+): StepInputBinding => {
+  if ("expression" in binding) {
+    return {
+      target: copyLocalInputPath(binding.target),
+      expression: copyInputExpression(binding.expression),
+    };
+  }
+  return copyInputBinding(binding);
+};
+
 const copyOutputBinding = (binding: OutputBinding): OutputBinding => ({
   source:
     typeof binding.source === "string"