Add mobile bottom nav + PWA installability

Same shell pattern as top-buh/top-finance/thbd-portal: desktop top nav
stays >=lg, a fixed bottom tab bar takes over below it. Only 2 nav
links here so both fit directly, no overflow menu needed.

Also adds manifest.webmanifest + 192/512 icons (rendered from the
existing icon.svg) and appleWebApp/viewport metadata so the app can be
installed to a phone's home screen.

Nudged ticket-toasts.tsx's fixed bottom offset so it clears the new
bottom nav bar on mobile instead of overlapping it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Gh2UXUQUVBWroWEnn1FLFG

public/manifest.webmanifest

@@ -0,0 +1,14 @@
+{
+  "name": "top-tickets",
+  "short_name": "top-tickets",
+  "description": "Helpdesk for support@top-sysops.ru, Telegram, and the web.",
+  "start_url": "/dashboard",
+  "scope": "/",
+  "display": "standalone",
+  "background_color": "#f8f7fb",
+  "theme_color": "#6d28d9",
+  "icons": [
+    { "src": "/icon-192.png", "sizes": "192x192", "type": "image/png", "purpose": "any" },
+    { "src": "/icon-512.png", "sizes": "512x512", "type": "image/png", "purpose": "any" }
+  ]
+}

src/app/(admin)/layout.tsx

@@ -3,7 +3,7 @@ import Link from "next/link";
 import { Ticket } from "lucide-react";
 import { getCurrentSession } from "@/lib/auth/session";
 import { LogoutButton } from "./logout-button";
-import { NavLinks } from "./nav-links";
+import { NavShell } from "./nav-shell";
 import { ThemeToggle } from "./theme-toggle";
 import { SettingsMenu } from "./settings-menu";
 import { NotificationToggle } from "./notification-toggle";
@@ -21,18 +21,18 @@ export default async function AdminLayout({ children }: { children: React.ReactN
 
   return (
     <div className="flex min-h-screen flex-col bg-bg">
-      <header className="border-b border-border bg-surface">
-        <div className="mx-auto flex max-w-[1800px] flex-wrap items-center gap-x-6 gap-y-2 px-4 py-3 sm:px-6">
-          <Link href="/dashboard" className="flex items-center gap-2 font-display text-[15px] font-bold tracking-tight">
+      <header className="border-b border-border bg-surface pt-[env(safe-area-inset-top)]">
+        <div className="mx-auto flex max-w-[1800px] items-center gap-3 px-4 py-2.5 sm:gap-6 sm:px-6 sm:py-3">
+          <Link href="/dashboard" className="flex shrink-0 items-center gap-2 font-display text-[15px] font-bold tracking-tight">
             <div className="flex h-7 w-7 shrink-0 items-center justify-center rounded-md bg-accent text-white">
               <Ticket size={15} strokeWidth={2.5} />
             </div>
-            top-tickets
+            <span className="hidden sm:inline">top-tickets</span>
           </Link>
-          <div className="order-last w-full overflow-x-auto sm:order-none sm:w-auto sm:flex-1 sm:overflow-visible sm:flex sm:justify-center">
-            <NavLinks isAdmin={isAdmin} />
+          <div className="flex flex-1 justify-center overflow-x-auto">
+            <NavShell isAdmin={isAdmin} />
           </div>
-          <div className="ml-auto flex items-center gap-2 sm:ml-0 sm:gap-3">
+          <div className="ml-auto flex shrink-0 items-center gap-2 sm:ml-0 sm:gap-3">
             <NotificationToggle />
             <ThemeToggle />
             {isAdmin && <SettingsMenu isAdmin={isAdmin} />}
@@ -41,7 +41,10 @@ export default async function AdminLayout({ children }: { children: React.ReactN
           </div>
         </div>
       </header>
-      <main className="mx-auto w-full max-w-[1800px] flex-1 px-4 py-6 sm:px-6">{children}</main>
+      {/* pb: clears the fixed mobile bottom-tab bar (~52px + safe-area) so it never covers the last bit of scrolled content */}
+      <main className="mx-auto w-full max-w-[1800px] flex-1 px-4 py-6 pb-[calc(4.25rem+env(safe-area-inset-bottom))] sm:px-6 lg:pb-6">
+        {children}
+      </main>
       <DesktopNotifications currentUser={currentUser} />
       <TicketToasts currentUser={currentUser} />
     </div>

src/app/(admin)/mobile-nav.tsx

@@ -0,0 +1,34 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { links } from "./nav-data";
+
+/** Bottom tab bar for mobile — mirrors top-buh/top-finance's pattern. Only 2 links here, both fit as primary tabs, no overflow "Ещё" needed. */
+export function MobileNav({ isAdmin }: { isAdmin: boolean }) {
+  const pathname = usePathname();
+  const visibleLinks = links.filter((link) => !link.adminOnly || isAdmin);
+
+  return (
+    <nav
+      className="fixed inset-x-0 bottom-0 z-30 flex border-t border-border bg-surface pb-[env(safe-area-inset-bottom)] lg:hidden"
+      aria-label="Основная навигация"
+    >
+      {visibleLinks.map(({ href, label, icon: Icon }) => {
+        const active = pathname.startsWith(href);
+        return (
+          <Link
+            key={href}
+            href={href}
+            className={`flex flex-1 flex-col items-center gap-0.5 py-2 text-[11px] font-medium ${
+              active ? "text-accent" : "text-text-faint"
+            }`}
+          >
+            <Icon size={20} />
+            {label}
+          </Link>
+        );
+      })}
+    </nav>
+  );
+}

src/app/(admin)/nav-data.ts

@@ -0,0 +1,13 @@
+import { LayoutDashboard, BarChart3 } from "lucide-react";
+
+export interface NavLink {
+  href: string;
+  label: string;
+  icon: typeof LayoutDashboard;
+  adminOnly: boolean;
+}
+
+export const links: NavLink[] = [
+  { href: "/dashboard", label: "Заявки", icon: LayoutDashboard, adminOnly: false },
+  { href: "/stats", label: "Статистика", icon: BarChart3, adminOnly: true },
+];

src/app/(admin)/nav-links.tsx

@@ -2,12 +2,7 @@
 
 import Link from "next/link";
 import { usePathname } from "next/navigation";
-import { LayoutDashboard, BarChart3 } from "lucide-react";
-
-const links = [
-  { href: "/dashboard", label: "Заявки", icon: LayoutDashboard, adminOnly: false },
-  { href: "/stats", label: "Статистика", icon: BarChart3, adminOnly: true },
-];
+import { links } from "./nav-data";
 
 export function NavLinks({ isAdmin }: { isAdmin: boolean }) {
   const pathname = usePathname();

src/app/(admin)/nav-shell.tsx

@@ -0,0 +1,16 @@
+"use client";
+
+import { NavLinks } from "./nav-links";
+import { MobileNav } from "./mobile-nav";
+
+/** Desktop top nav (>=lg) + mobile bottom tab bar (<lg), same split as top-buh/top-finance/top-reservation. */
+export function NavShell({ isAdmin }: { isAdmin: boolean }) {
+  return (
+    <>
+      <div className="hidden lg:flex">
+        <NavLinks isAdmin={isAdmin} />
+      </div>
+      <MobileNav isAdmin={isAdmin} />
+    </>
+  );
+}

src/app/(admin)/ticket-toasts.tsx

@@ -103,7 +103,7 @@ export function TicketToasts({ currentUser }: { currentUser: { id: string; role:
   }
 
   return (
-    <div className="pointer-events-none fixed bottom-4 right-4 z-50 flex w-full max-w-sm flex-col gap-2">
+    <div className="pointer-events-none fixed bottom-[calc(4.25rem+env(safe-area-inset-bottom)+0.5rem)] right-4 z-50 flex w-full max-w-sm flex-col gap-2 lg:bottom-4">
       <AnimatePresence initial={false}>
         {toasts.map((toast) => (
           <motion.div

src/app/layout.tsx

@@ -1,4 +1,4 @@
-import type { Metadata } from "next";
+import type { Metadata, Viewport } from "next";
 import { Onest, Unbounded, JetBrains_Mono } from "next/font/google";
 import "./globals.css";
 
@@ -21,6 +21,23 @@ const mono = JetBrains_Mono({
 export const metadata: Metadata = {
   title: "top-tickets",
   description: "Helpdesk for support@top-sysops.ru, Telegram, and the web.",
+  manifest: "/manifest.webmanifest",
+  appleWebApp: {
+    // iOS ignores the web manifest's `display: standalone` — this pair of
+    // meta tags is the separate (older, Apple-specific) mechanism it
+    // actually reads for "hide Safari's chrome when launched from the
+    // home screen icon".
+    capable: true,
+    statusBarStyle: "black-translucent",
+    title: "top-tickets",
+  },
+};
+
+export const viewport: Viewport = {
+  width: "device-width",
+  initialScale: 1,
+  viewportFit: "cover",
+  themeColor: "#6d28d9",
 };
 
 // Reads the persisted theme before hydration so there's no flash of the