feat: add plan stacking

apps/api/src/routes/auth.ts

@@ -115,7 +115,7 @@ export const account = new Elysia({ prefix: "/account" })
   .use(requireAuth)
 
   .get("/settings", async ({ accountId }) => {
-    const [acc] = await sql`SELECT id, email_hash, plan, plan_expires_at, created_at FROM accounts WHERE id = ${accountId}`;
+    const [acc] = await sql`SELECT id, email_hash, plan, plan_expires_at, plan_stack, created_at FROM accounts WHERE id = ${accountId}`;
     const keys = await sql`SELECT id, key, label, created_at, last_used_at FROM api_keys WHERE account_id = ${accountId} ORDER BY created_at DESC`;
     const [{ count: monitorCount }] = await sql`SELECT COUNT(*)::int as count FROM monitors WHERE account_id = ${accountId}`;
     const limits = getPlanLimits(acc.plan);
@@ -124,6 +124,7 @@ export const account = new Elysia({ prefix: "/account" })
       has_email: !!acc.email_hash,
       plan: acc.plan,
       plan_expires_at: acc.plan_expires_at,
+      plan_stack: acc.plan_stack || [],
       monitor_count: monitorCount,
       limits,
       created_at: acc.created_at,