fix(preview): sync fs_dev_servers state with container suspension to properly handle idle wakeup

vibn-frontend/lib/dev-container.ts

@@ -186,6 +186,7 @@ function renderDevCompose(projectSlug: string, projectId: string): string {
     image: ${VIBN_DEV_IMAGE}
     pull_policy: never
     restart: unless-stopped
+    command: ["bash", "-c", "echo 'Booting Vibn Container...'; if [ -f /workspace/package.json ]; then echo 'Found package.json, checking deps...'; if [ ! -d /workspace/node_modules ]; then npm install; fi; echo 'Starting dev server...'; npx next dev -H 0.0.0.0 --webpack; else echo 'No package.json found. Standing by...'; sleep infinity; fi"]
     working_dir: /workspace
     volumes:
       - workspace:/workspace
@@ -335,6 +336,29 @@ export async function ensureDevContainer(
     ],
   );
 
+  // In Path 2, the dev container natively runs the Next.js server on port 3000.
+  // We automatically inject the static preview tracking row so the UI sees it instantly.
+  const previewUrl = buildPreviewUrl(opts.projectId, opts.projectSlug, 3000);
+  if (previewUrl) {
+    await query(
+      `INSERT INTO fs_dev_servers
+         (id, project_id, workspace, name, command, port, preview_url, state)
+       VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+       ON CONFLICT (id) DO UPDATE
+         SET state = EXCLUDED.state`,
+      [
+        `ds_primary_${opts.projectId.replace(/-/g, "").slice(0, 10)}`,
+        opts.projectId,
+        opts.workspace.slug,
+        "Primary App",
+        "npx next dev -H 0.0.0.0 --webpack",
+        3000,
+        previewUrl,
+        "running",
+      ],
+    );
+  }
+
   // Bookkeeping link so apps_list / projects_get see the dev container
   // under the right Vibn project.
   try {
@@ -364,11 +388,17 @@ export async function suspendDevContainer(projectId: string): Promise<void> {
       WHERE project_id = $1`,
     [projectId],
   );
+
+  // Also mark the fixed port-3000 app as stopped so the UI knows
+  await query(
+    `UPDATE fs_dev_servers SET state = 'stopped' WHERE project_id = $1 AND port = 3000`,
+    [projectId],
+  ).catch(() => {});
 }
 
 export async function resumeDevContainer(projectId: string): Promise<void> {
   const row = await getDevContainerRow(projectId);
-  if (!row) throw new Error(`No dev container provisioned for ${projectId}`);
+  if (!row) return;
   if (row.state === "running") return;
   await startService(row.service_uuid);
   await query(
@@ -377,6 +407,12 @@ export async function resumeDevContainer(projectId: string): Promise<void> {
       WHERE project_id = $1`,
     [projectId],
   );
+
+  // Mark the fixed port-3000 app as running again since the container boots it
+  await query(
+    `UPDATE fs_dev_servers SET state = 'running' WHERE project_id = $1 AND port = 3000`,
+    [projectId],
+  ).catch(() => {});
 }
 
 async function touchActivity(projectId: string): Promise<void> {