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

app/[workspace]/project/[projectId]/(home)/layout.tsx

@@ -0,0 +1,34 @@
+"use client";
+
+/**
+ * Project home scaffold.
+ *
+ * Mirrors the /[workspace]/projects scaffold: VIBNSidebar on the left,
+ * cream main area on the right. Used only for the project home page
+ * (`/{workspace}/project/{id}`) — sub-routes use the (workspace) group
+ * with the ProjectShell tab nav instead.
+ */
+
+import { ReactNode } from "react";
+import { useParams } from "next/navigation";
+import { Toaster } from "sonner";
+import { VIBNSidebar } from "@/components/layout/vibn-sidebar";
+import { ProjectAssociationPrompt } from "@/components/project-association-prompt";
+
+export default function ProjectHomeLayout({ children }: { children: ReactNode }) {
+  const params = useParams();
+  const workspace = params.workspace as string;
+
+  return (
+    <>
+      <div style={{ display: "flex", height: "100vh", background: "#f6f4f0", overflow: "hidden" }}>
+        <VIBNSidebar workspace={workspace} />
+        <main style={{ flex: 1, overflow: "auto" }}>
+          {children}
+        </main>
+      </div>
+      <ProjectAssociationPrompt workspace={workspace} />
+      <Toaster position="top-center" />
+    </>
+  );
+}