feat(FN-3158): migrate roadmap domain modules to fusion-plugin-roadmap pack

The merge extracts the roadmap domain into a standalone plugin package (`plugins/fusion-plugin-roadmap`), wiring it into the CLI bundle and dashboard scaffold, with new modules for roadmap types, store, ordering, and handoff logic. A secondary change normalizes shell host bootstrap, introducing `She

Fusion-Task-Id: FN-3158

plugins/fusion-plugin-roadmap/src/__tests__/index.test.ts

@@ -1,5 +1,6 @@
+import { readFileSync } from "node:fs";
+import { resolve } from "node:path";
 import { describe, expect, it } from "vitest";
-import { RoadmapStore as CoreRoadmapStore } from "@fusion/core";
 import plugin, {
   RoadmapStore,
   applyRoadmapFeatureReorder,
@@ -14,12 +15,33 @@ import plugin, {
 } from "../index.js";
 
 describe("fusion-plugin-roadmap package surface", () => {
+  it("keeps manifest and plugin entry metadata aligned", () => {
+    const manifest = JSON.parse(readFileSync(resolve(process.cwd(), "manifest.json"), "utf8")) as {
+      id: string;
+      version: string;
+      dashboardViews?: Array<{ viewId: string }>;
+    };
+
+    expect(plugin.manifest.id).toBe(manifest.id);
+    expect(plugin.manifest.version).toBe(manifest.version);
+    expect(plugin.dashboardViews?.[0]?.viewId).toBe(manifest.dashboardViews?.[0]?.viewId);
+  });
+
+  it("declares expected package exports", () => {
+    const pkg = JSON.parse(readFileSync(resolve(process.cwd(), "package.json"), "utf8")) as {
+      exports: Record<string, unknown>;
+    };
+
+    expect(pkg.exports).toHaveProperty(".");
+    expect(pkg.exports).toHaveProperty("./server");
+    expect(pkg.exports).toHaveProperty("./dashboard-view");
+  });
+
   it("exports plugin manifest with roadmap id", () => {
     expect(plugin.manifest.id).toBe("fusion-plugin-roadmap");
   });
 
   it("re-exports roadmap domain symbols", () => {
-    expect(RoadmapStore).toBe(CoreRoadmapStore);
     expect(typeof normalizeRoadmapMilestoneOrder).toBe("function");
     expect(typeof applyRoadmapMilestoneReorder).toBe("function");
     expect(typeof normalizeRoadmapFeatureOrder).toBe("function");