fix: handle Cloud Run 409 by linking to existing service; show provisioning spinner not failure

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

lib/cloud-run-workspace.ts

@@ -112,6 +112,16 @@ export async function provisionTheiaWorkspace(
 
   if (!createRes.ok) {
     const body = await createRes.text();
+
+    // 409 = service already exists — fetch its URL instead of failing
+    if (createRes.status === 409) {
+      console.log(`[workspace] Cloud Run service already exists: ${serviceName} — fetching existing URL`);
+      const serviceUrl = await waitForServiceUrl(serviceName, token);
+      await allowUnauthenticated(serviceName, token);
+      console.log(`[workspace] Linked to existing service: ${serviceName} → ${serviceUrl}`);
+      return { serviceUrl, serviceName };
+    }
+
     throw new Error(`Cloud Run create service failed (${createRes.status}): ${body}`);
   }