让创作节点声明并注入绑定库，并新增用户需求步承接偏好。

装载时同时注入正文安全子集；编排与对话落盘都能看见可用库条目。

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

tests/creation-flow.test.ts

@@ -499,6 +499,16 @@ describe("creation-flow", () => {
     expect(catalog?.modules.find((m) => m.name === "故事推进")?.intake).toBe(
       "dictate",
     );
+    expect(catalog?.modules.find((m) => m.name === "用户需求")?.libraries).toEqual([
+      "preferences",
+    ]);
+    expect(
+      catalog?.modules.find((m) => m.name === "叙事指南")?.libraries,
+    ).toEqual(["style-packs"]);
+    expect(
+      catalog?.modules.find((m) => m.name === "叙事指南与故事推进")?.libraries,
+    ).toEqual(["style-packs"]);
+    expect(dictateBlock).toContain("【偏好库 · 可选用】");
     expect(
       catalogModulesForIntake(catalog!, "recipe").some(
         (m) => m.name === "叙事指南",