feat(mobile): extend mobile experience to Accounts role for payment actions

- Add ACCOUNTS to MOBILE_ROLES so the desktop-required wall no longer
  blocks them on small screens.
- MobileBottomNav is now role-aware: ACCOUNTS gets Payments + Profile tabs;
  MANAGER/SUPERUSER keep Approvals + Profile.  Role prop threaded from
  layout → MobileBottomNav.
- PaymentActions (both MGR_APPROVED and SENT_FOR_PAYMENT states) stacks
  vertically on small screens — input takes full width, button below it —
  then reverts to the horizontal inline layout at sm+ breakpoint.
- Payments page card bottom row (status badge + action) stacks on mobile
  (flex-col sm:flex-row) so the reference input isn't squashed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

App/pelagia-portal/app/(portal)/layout.tsx

@@ -7,8 +7,8 @@ import { MobileHeader } from "@/components/layout/mobile-header";
 import { MobileBottomNav } from "@/components/layout/mobile-bottom-nav";
 import { DesktopRequired } from "@/components/layout/desktop-required";
 
-// Roles that have a useful mobile experience (approval queue + PO review)
-const MOBILE_ROLES = ["MANAGER", "SUPERUSER"] as const;
+// Roles that have a useful mobile experience
+const MOBILE_ROLES = ["MANAGER", "SUPERUSER", "ACCOUNTS"] as const;
 
 export default async function PortalLayout({
   children,
@@ -67,8 +67,8 @@ export default async function PortalLayout({
           {children}
         </main>
 
-        {/* Mobile bottom nav — managers/superusers only */}
-        {hasMobile && <MobileBottomNav />}
+        {/* Mobile bottom nav — roles with a mobile experience */}
+        {hasMobile && <MobileBottomNav role={session.user.role} />}
 
         {/* Full-screen overlay for roles without a mobile experience */}
         {!hasMobile && <DesktopRequired />}

App/pelagia-portal/app/(portal)/payments/page.tsx

@@ -74,7 +74,7 @@ export default async function PaymentsPage() {
                   </Link>
                 </div>
               </div>
-              <div className="mt-4 border-t border-neutral-100 pt-4 flex items-center justify-between gap-4">
+              <div className="mt-4 border-t border-neutral-100 pt-4 flex flex-col sm:flex-row items-start sm:items-center justify-between gap-3">
                 <span className={`text-xs font-medium rounded-full px-2.5 py-0.5 ${
                   po.status === "SENT_FOR_PAYMENT"
                     ? "bg-primary-50 text-primary-700"

App/pelagia-portal/app/(portal)/payments/payment-actions.tsx

@@ -31,12 +31,12 @@ export function PaymentActions({ poId, poStatus }: { poId: string; poStatus: POS
 
   if (poStatus === "MGR_APPROVED") {
     return (
-      <div className="flex items-center gap-3">
+      <div className="flex flex-col sm:flex-row items-stretch sm:items-center gap-2">
         {error && <span className="text-xs text-danger-700">{error}</span>}
         <button
           onClick={handleProcessPayment}
           disabled={pending}
-          className="rounded-lg bg-primary-600 px-4 py-2 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60 transition-colors whitespace-nowrap"
+          className="w-full sm:w-auto rounded-lg bg-primary-600 px-4 py-2 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60 transition-colors"
         >
           {pending ? "Processing…" : "Start Payment Processing"}
         </button>
@@ -46,7 +46,7 @@ export function PaymentActions({ poId, poStatus }: { poId: string; poStatus: POS
 
   if (poStatus === "SENT_FOR_PAYMENT") {
     return (
-      <form onSubmit={handleMarkPaid} className="flex items-center gap-3">
+      <form onSubmit={handleMarkPaid} className="flex flex-col sm:flex-row items-stretch sm:items-center gap-2 w-full">
         <input
           type="text"
           placeholder="Payment reference / transaction ID"
@@ -58,7 +58,7 @@ export function PaymentActions({ poId, poStatus }: { poId: string; poStatus: POS
         <button
           type="submit"
           disabled={pending}
-          className="rounded-lg bg-success px-4 py-2 text-sm font-semibold text-white hover:opacity-90 disabled:opacity-60 transition-opacity whitespace-nowrap"
+          className="w-full sm:w-auto rounded-lg bg-success px-4 py-2 text-sm font-semibold text-white hover:opacity-90 disabled:opacity-60 transition-opacity"
         >
           {pending ? "Confirming…" : "Confirm Payment Sent"}
         </button>

App/pelagia-portal/components/layout/mobile-bottom-nav.tsx

@@ -2,20 +2,32 @@
 
 import Link from "next/link";
 import { usePathname } from "next/navigation";
-import { CheckSquare, UserCircle } from "lucide-react";
+import { CheckSquare, CreditCard, UserCircle } from "lucide-react";
 import { cn } from "@/lib/utils";
+import type { Role } from "@prisma/client";
 
-const TABS = [
+const MANAGER_TABS = [
   { href: "/approvals", label: "Approvals", icon: CheckSquare },
   { href: "/profile",   label: "Profile",   icon: UserCircle  },
 ];
 
-export function MobileBottomNav() {
+const ACCOUNTS_TABS = [
+  { href: "/payments", label: "Payments", icon: CreditCard },
+  { href: "/profile",  label: "Profile",  icon: UserCircle },
+];
+
+function tabsForRole(role: Role) {
+  if (role === "ACCOUNTS") return ACCOUNTS_TABS;
+  return MANAGER_TABS; // MANAGER, SUPERUSER
+}
+
+export function MobileBottomNav({ role }: { role: Role }) {
   const pathname = usePathname();
+  const tabs = tabsForRole(role);
 
   return (
     <nav className="md:hidden flex h-16 shrink-0 items-stretch border-t border-neutral-200 bg-white">
-      {TABS.map(({ href, label, icon: Icon }) => {
+      {tabs.map(({ href, label, icon: Icon }) => {
         const active = pathname === href || pathname.startsWith(href + "/");
         return (
           <Link