fix(FN-2698): load plugins during CLI runtime startup

- Load configured plugins during dashboard startup before launching the UI flow
- Load plugins during serve and daemon startup so runtime hooks are available immediately
- Add targeted CLI command tests for dashboard, serve, and daemon auto-load behavior at startup
- Add a changeset documenting the plugin runtime startup fix for @runfusion/fusion

packages/cli/src/commands/__tests__/serve.test.ts

@@ -281,6 +281,7 @@ const mocks = vi.hoisted(() => {
   const pluginLoaderCtor = vi.fn().mockImplementation(() => {
     const pluginLoader = {
       loadPlugin: vi.fn().mockResolvedValue(undefined),
+      loadAllPlugins: vi.fn().mockResolvedValue({ loaded: 0, errors: 0 }),
       stopPlugin: vi.fn().mockResolvedValue(undefined),
       reloadPlugin: vi.fn().mockResolvedValue(undefined),
       getPluginRoutes: vi.fn().mockReturnValue([]),
@@ -892,6 +893,41 @@ describe("runServe — Plugin wiring", () => {
     await triggerSignal("SIGINT");
   });
 
+  it("auto-loads installed plugins during startup", async () => {
+    const { PluginLoader } = await import("@fusion/core");
+
+    await runServe(4040, {});
+
+    const loaderInstance = (PluginLoader as unknown as ReturnType<typeof vi.fn>).mock.results[0]?.value as
+      | { loadAllPlugins: ReturnType<typeof vi.fn> }
+      | undefined;
+    expect(loaderInstance?.loadAllPlugins).toHaveBeenCalledTimes(1);
+
+    await triggerSignal("SIGINT");
+  });
+
+  it("continues startup when plugin auto-load fails", async () => {
+    const { PluginLoader } = await import("@fusion/core");
+    const errorSpy = vi.spyOn(console, "error").mockImplementation(() => {});
+    (PluginLoader as unknown as ReturnType<typeof vi.fn>).mockImplementationOnce(() => ({
+      loadPlugin: vi.fn().mockResolvedValue(undefined),
+      loadAllPlugins: vi.fn().mockRejectedValue(new Error("plugin load failed")),
+      stopPlugin: vi.fn().mockResolvedValue(undefined),
+      reloadPlugin: vi.fn().mockResolvedValue(undefined),
+      getPluginRoutes: vi.fn().mockReturnValue([]),
+      getPlugin: vi.fn(),
+      getLoadedPlugins: vi.fn().mockReturnValue([]),
+    }));
+
+    await expect(runServe(4040, {})).resolves.toBeUndefined();
+    expect(errorSpy).toHaveBeenCalledWith(
+      expect.stringContaining("[plugins] Failed to load plugins: plugin load failed")
+    );
+
+    await triggerSignal("SIGINT");
+    errorSpy.mockRestore();
+  });
+
   it("includes plugin wiring in headless server", async () => {
     const { createServer } = await import("@fusion/dashboard");