feat(FN-3396): bundle Cursor CLI as a plugin provider with dashboard auth w

Merges FN-3396's full Cursor CLI provider integration (Steps 1–4): defines a CLI-backed provider contract, adds the `fusion-plugin-cursor-runtime` plugin package with process management and runtime probes, wires dashboard auth flows and UI (ProviderCard, onboarding modal, settings), and bundles the

Fusion-Task-Id: FN-3396

plugins/fusion-plugin-cursor-runtime/src/index.ts

@@ -0,0 +1,65 @@
+import { definePlugin } from "@fusion/plugin-sdk";
+import type { FusionPlugin } from "@fusion/plugin-sdk";
+import { probeCursorBinary } from "./probe.js";
+import { discoverCursorProviderModels } from "./provider.js";
+import { CursorRuntimeAdapter } from "./runtime-adapter.js";
+
+const plugin: FusionPlugin = definePlugin({
+  manifest: {
+    id: "fusion-plugin-cursor-runtime",
+    name: "Cursor Runtime Plugin",
+    version: "0.1.0",
+    description: "Cursor CLI runtime support for Fusion",
+    runtime: {
+      runtimeId: "cursor",
+      name: "Cursor Runtime",
+      version: "0.1.0",
+    },
+  },
+  state: "installed",
+  hooks: {},
+  runtime: {
+    metadata: {
+      runtimeId: "cursor",
+      name: "Cursor Runtime",
+      version: "0.1.0",
+    },
+    factory: async () => new CursorRuntimeAdapter(),
+  },
+  cliProviders: [
+    {
+      providerId: "cursor-cli",
+      displayName: "Cursor CLI",
+      binaryName: "cursor-agent",
+      providerType: "cli",
+      statusRoute: "/providers/cursor-cli/status",
+      authRoute: "/auth/cursor-cli",
+      actions: [
+        { actionId: "enable", label: "Enable", actionType: "enable", method: "POST", route: "/auth/cursor-cli" },
+        { actionId: "disable", label: "Disable", actionType: "disable", method: "POST", route: "/auth/cursor-cli" },
+        { actionId: "test", label: "Test", actionType: "test", method: "GET", route: "/providers/cursor-cli/status" }
+      ],
+      probe: async () => {
+        const status = await probeCursorBinary();
+        return {
+          available: status.available,
+          authenticated: status.authenticated,
+          binaryPath: status.binaryPath,
+          binaryName: status.binaryName,
+          version: status.version,
+          reason: status.reason,
+        };
+      },
+      discoverModels: discoverCursorProviderModels,
+      runtime: {
+        runtimeId: "cursor",
+        createAdapter: async () => new CursorRuntimeAdapter(),
+      },
+    },
+  ],
+});
+
+export default plugin;
+export { probeCursorBinary } from "./probe.js";
+export { discoverCursorProviderModels } from "./provider.js";
+export type { CursorBinaryStatus } from "./types.js";