Rip out Theia, ship P5.1 attach E2E + Justine UI work-in-progress

Theia rip-out:
- Delete app/api/theia-auth/route.ts (Traefik ForwardAuth shim)
- Delete app/api/projects/[projectId]/workspace/route.ts and
  app/api/projects/prewarm/route.ts (Cloud Run Theia provisioning)
- Delete lib/cloud-run-workspace.ts and lib/coolify-workspace.ts
- Strip provisionTheiaWorkspace + theiaWorkspaceUrl/theiaAppUuid/
  theiaError from app/api/projects/create/route.ts response
- Remove Theia callbackUrl branch in app/auth/page.tsx
- Drop "Open in Theia" button + xterm/Theia PTY copy in build/page.tsx
- Drop theiaWorkspaceUrl from deployment/page.tsx Project type
- Strip Theia IDE line + theia-code-os from advisor + agent-chat
  context strings
- Scrub Theia mention from lib/auth/workspace-auth.ts comment

P5.1 (custom apex domains + DNS):
- lib/coolify.ts + lib/opensrs.ts: nameserver normalization, OpenSRS
  XML auth, Cloud DNS plumbing
- scripts/smoke-attach-e2e.ts: full prod GCP + sandbox OpenSRS +
  prod Coolify smoke covering register/zone/A/NS/PATCH/cleanup

In-progress (Justine onboarding/build, MVP setup, agent telemetry):
- New (justine)/stories, project (home) layouts, mvp-setup, run, tasks
  routes + supporting components
- Project shell + sidebar + nav refactor for the Stackless palette
- Agent session API hardening (sessions, events, stream, approve,
  retry, stop) + atlas-chat, advisor, design-surfaces refresh
- New scripts/sync-db-url-from-coolify.mjs +
  scripts/prisma-db-push.mjs + docker-compose.local-db.yml for
  local Prisma workflows
- lib/dev-bypass.ts, lib/chat-context-refs.ts, lib/prd-sections.ts
- Misc: stories CSS, debug/prisma route, modal-theme, BuildLivePlanPanel

Made-with: Cursor

next.config.ts

@@ -1,7 +1,22 @@
 import type { NextConfig } from "next";
+import path from "path";
+import { fileURLToPath } from "url";
+
+// This app lives in vibn-frontend; a lockfile under $HOME can make Turbopack pick the wrong root
+// and hydrate with a mismatched client bundle (e.g. different JustineNav markup).
+const turbopackRoot = path.dirname(fileURLToPath(import.meta.url));
+
+// Google OAuth on localhost: NextAuth must build the same callback URL Google expects.
+// If NEXTAUTH_URL is unset in dev, default it (set explicitly if you use 127.0.0.1 or another port).
+if (process.env.NODE_ENV === "development" && !process.env.NEXTAUTH_URL?.trim()) {
+  process.env.NEXTAUTH_URL = "http://localhost:3000";
+}
 
 const nextConfig: NextConfig = {
-  output: 'standalone',
+  turbopack: {
+    root: turbopackRoot,
+  },
+  output: "standalone",
   serverExternalPackages: ["@prisma/client", "prisma"],
   typescript: {
     ignoreBuildErrors: true,