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

marketing/components/justine/JustineNav.tsx

@@ -56,7 +56,7 @@ export function JustineNav() {
           <Link href="/pricing" style={{ fontSize: 14, color: "var(--muted)", textDecoration: "none" }}>
             Pricing
           </Link>
-          <Link href="/features" style={{ fontSize: 14, color: "var(--muted)", textDecoration: "none" }}>
+          <Link href="/stories" style={{ fontSize: 14, color: "var(--muted)", textDecoration: "none" }}>
             Stories
           </Link>
           <span style={{ fontSize: 14, color: "var(--muted)" }}>Blog</span>
@@ -93,7 +93,7 @@ export function JustineNav() {
         <Link href="/pricing" onClick={close}>
           Pricing
         </Link>
-        <Link href="/features" onClick={close}>
+        <Link href="/stories" onClick={close}>
           Stories
         </Link>
         <Link href="#" onClick={(e) => { e.preventDefault(); close(); }}>