fix: upgrade to Next.js 16.2.1 and resolve bundling issues

- Fixed client bundle contamination by moving child_process-dependent code
- Created standalone /api/robots/command route for SSH robot commands
- Created plugins router to replace robots.plugins for plugin management
- Added getStudyPlugins procedure to studies router
- Fixed trial.studyId references to trial.experiment.studyId
- Updated WizardInterface to use REST API for robot commands

src/trpc/react.tsx

@@ -7,7 +7,7 @@ import { type inferRouterInputs, type inferRouterOutputs } from "@trpc/server";
 import { useState } from "react";
 import SuperJSON from "superjson";
 
-import { type AppRouter } from "~/server/api/root";
+import type { AppRouter } from "~/server/api/root";
 import { createQueryClient } from "./query-client";
 
 let clientQueryClientSingleton: QueryClient | undefined = undefined;