fix(FN-3161): migrate roadmap dashboard surface to bundled plugin

- Move RoadmapsView UI, hooks, and tests from dashboard app into fusion-plugin-roadmap
- Replace the built-in roadmaps route/nav wiring with plugin view registration and host rendering
- Add bundled plugin view registration bootstrap in dashboard startup
- Update roadmap plugin build/test config and add FN-3161 removal changeset

Fusion-Task-Id: FN-3161

packages/dashboard/app/plugins/PluginDashboardViewHost.tsx

@@ -1,5 +1,6 @@
 import { PluginDashboardViewHost as RegistryPluginDashboardViewHost } from "./pluginViewRegistry";
-import type { PluginDashboardViewContext, PluginTaskView } from "./pluginViewRegistry";
+import type { PluginTaskView } from "./pluginViewRegistry";
+import type { PluginDashboardViewContext } from "./types";
 
 export function PluginDashboardViewHost({ taskView, context }: { taskView: PluginTaskView; context?: PluginDashboardViewContext }) {
   return <RegistryPluginDashboardViewHost viewId={taskView} context={context} />;

packages/dashboard/app/plugins/pluginViewRegistry.tsx

@@ -1,20 +1,11 @@
-import type { Task, TaskDetail, WorkflowStep } from "@fusion/core";
+import type { PluginDashboardViewContext } from "./types";
 import { AlertTriangle } from "lucide-react";
 import { lazy, Suspense, type LazyExoticComponent, type ReactElement, type ReactNode } from "react";
 import { ErrorBoundary } from "../components/ErrorBoundary";
-import type { DetailTaskTab } from "../hooks/useModalManager";
 import "./pluginViewRegistry.css";
 
 export type PluginTaskView = `plugin:${string}:${string}`;
 
-export interface PluginDashboardViewContext {
-  projectId?: string;
-  tasks: Task[];
-  workflowSteps: WorkflowStep[];
-  openTaskDetail: (task: Task | TaskDetail, initialTab?: DetailTaskTab) => void;
-  renderTaskCard?: (task: Task | TaskDetail) => ReactNode;
-}
-
 type PluginViewComponent = LazyExoticComponent<({ context }: { context?: PluginDashboardViewContext }) => ReactElement>;
 
 const registry = new Map<string, PluginViewComponent>();
@@ -46,25 +37,15 @@ export function getPluginViewComponent(pluginId: string, viewId: string): Plugin
   return registry.get(getPluginViewId(pluginId, viewId)) ?? null;
 }
 
+export function isPluginViewRegistered(pluginId: string, viewId: string): boolean {
+  return registry.has(getPluginViewId(pluginId, viewId));
+}
+
 /** Test helper for clearing global registry state. */
 export function __test_clearPluginViewRegistry(): void {
   registry.clear();
-  registerBundledPluginViews();
 }
 
-function registerBundledPluginViews(): void {
-  registerPluginView(
-    "fusion-plugin-dependency-graph",
-    "graph",
-    lazy(async () => {
-      const mod = await import("@fusion-plugin-examples/dependency-graph/dashboard-view");
-      return { default: mod.DependencyGraphDashboardView };
-    }),
-  );
-}
-
-registerBundledPluginViews();
-
 function PluginViewUnavailable({ viewId }: { viewId: string }): ReactNode {
   return (
     <section className="card plugin-dashboard-view-missing" data-testid="plugin-view-unavailable">

packages/dashboard/app/plugins/registerBundledPluginViews.ts

@@ -0,0 +1,27 @@
+import { lazy } from "react";
+import { registerPluginView } from "./pluginViewRegistry";
+
+let registered = false;
+
+export function registerBundledPluginViews(): void {
+  if (registered) return;
+  registered = true;
+
+  registerPluginView(
+    "fusion-plugin-dependency-graph",
+    "graph",
+    lazy(async () => {
+      const mod = await import("@fusion-plugin-examples/dependency-graph/dashboard-view");
+      return { default: mod.DependencyGraphDashboardView };
+    }),
+  );
+
+  registerPluginView(
+    "roadmap-planner",
+    "roadmaps",
+    lazy(async () => {
+      const mod = await import("@fusion-plugin-examples/roadmap/dashboard-view");
+      return { default: mod.RoadmapDashboardView };
+    }),
+  );
+}

packages/dashboard/app/plugins/types.ts

@@ -14,6 +14,8 @@ import type { Task, TaskDetail, WorkflowStep } from "@fusion/core";
 /** Tab identifiers for the task detail modal. Mirrors the dashboard's local enum. */
 export type DetailTaskTab = "definition" | "logs" | "changes" | "comments" | "model" | "workflow";
 
+export type PluginToastType = "success" | "error" | "warning" | "info";
+
 /** Runtime context passed to a plugin dashboard view component. */
 export interface PluginDashboardViewContext {
   projectId?: string;
@@ -21,6 +23,7 @@ export interface PluginDashboardViewContext {
   workflowSteps: WorkflowStep[];
   openTaskDetail: (task: Task | TaskDetail, initialTab?: DetailTaskTab) => void;
   renderTaskCard?: (task: Task | TaskDetail) => ReactNode;
+  addToast?: (message: string, type?: PluginToastType) => void;
 }
 
 /** Composite view ID format: `plugin:{pluginId}:{viewId}`. */