feat: provision dedicated per-project Theia workspaces

- lib/coolify-workspace.ts: creates a Coolify docker-image app at
  {slug}.ide.vibnai.com for each project, patches in vibn-auth Traefik
  labels, sets env vars, and starts deployment
- create/route.ts: provisions Theia workspace after Gitea repo creation;
  stores theiaWorkspaceUrl + theiaAppUuid on the project record
- theia-auth/route.ts: for *.ide.vibnai.com hosts, verifies the
  authenticated user is the project owner (slug → fs_projects lookup)
- overview/page.tsx: Open IDE always links (dedicated URL or shared fallback)
- project-creation-modal.tsx: shows dedicated workspace URL in success screen

Co-authored-by: Cursor <cursoragent@cursor.com>

components/project-creation-modal.tsx

@@ -44,6 +44,7 @@ export function ProjectCreationModal({
   const [selectedRepo, setSelectedRepo] = useState<any>(null);
   const [createdProjectId, setCreatedProjectId] = useState<string | null>(null);
   const [createdGiteaRepo, setCreatedGiteaRepo] = useState<{ repo: string; repoUrl: string } | null>(null);
+  const [createdTheiaUrl, setCreatedTheiaUrl] = useState<string | null>(null);
 
   const [loading, setLoading] = useState(false);
   const [githubConnected, setGithubConnected] = useState(false);
@@ -90,6 +91,7 @@ export function ProjectCreationModal({
     setSelectedRepo(null);
     setCreatedProjectId(null);
     setCreatedGiteaRepo(null);
+    setCreatedTheiaUrl(null);
     setLoading(false);
   };
 
@@ -123,6 +125,7 @@ export function ProjectCreationModal({
         const data = await response.json();
         setCreatedProjectId(data.projectId);
         if (data.gitea) setCreatedGiteaRepo(data.gitea);
+        if (data.theiaWorkspaceUrl) setCreatedTheiaUrl(data.theiaWorkspaceUrl);
         toast.success('Project created!');
         setStep(3);
       } else {
@@ -322,12 +325,20 @@ export function ProjectCreationModal({
                     )}
                     Webhook registered (push, PR, issues → Vibn)
                   </li>
+                  <li className="flex items-center gap-2">
+                    {createdTheiaUrl ? (
+                      <CheckCircle2 className="h-3.5 w-3.5 text-green-500 shrink-0" />
+                    ) : (
+                      <XCircle className="h-3.5 w-3.5 text-yellow-500 shrink-0" />
+                    )}
+                    Dedicated IDE workspace{createdTheiaUrl ? ` at ${createdTheiaUrl.replace('https://', '')}` : ' — provisioning failed'}
+                  </li>
                 </ul>
               </div>
 
               <div className="flex gap-3">
                 <a
-                  href="https://theia.vibnai.com"
+                  href={createdTheiaUrl ?? 'https://theia.vibnai.com'}
                   target="_blank"
                   rel="noopener noreferrer"
                   className="flex-1"