feat: hide Finance nav for non-owner users (Savings visible to all)

src/components/Navigation.jsx

@@ -1,15 +1,21 @@
 import { NavLink } from "react-router-dom"
 import { Home, BarChart3, Wallet, PiggyBank, Settings } from "lucide-react"
+import { useAuthStore } from "../store/auth"
 import clsx from "clsx"
 
+const OWNER_ID = 1
+
 export default function Navigation() {
+  const user = useAuthStore((s) => s.user)
+  const isOwner = user?.id === OWNER_ID
+
   const navItems = [
     { to: "/", icon: Home, label: "Главная" },
     { to: "/tracker", icon: BarChart3, label: "Трекер" },
-    { to: "/finance", icon: Wallet, label: "Финансы" },
+    isOwner && { to: "/finance", icon: Wallet, label: "Финансы" },
     { to: "/savings", icon: PiggyBank, label: "Накопления" },
     { to: "/settings", icon: Settings, label: "Настройки" },
-  ]
+  ].filter(Boolean)
 
   return (
     <nav className="fixed bottom-0 left-0 right-0 bg-white/80 dark:bg-gray-900/80 backdrop-blur-xl border-t border-gray-100 dark:border-gray-800 z-50 transition-colors duration-300">