feat: add page items

frontend/src/App.jsx

@@ -8,6 +8,7 @@ import NotFoundPage from "./pages/NotFoundPage";
 import Contact from "./pages/Contact";
 import Cart from "./pages/Cart";
 import Profile from "./pages/Profile";
+import ItemPage from "./pages/ItemPage";
 
 const PrivateRoute = ({ children }) => {
   const token = localStorage.getItem("token");
@@ -37,6 +38,7 @@ export default function App() {
             </PrivateRoute>
           }
         />
+        <Route path="items/:id" element={<ItemPage />} />
         <Route path="*" element={<NotFoundPage />} />
       </Routes>
     </BrowserRouter>

frontend/src/components/CardItem.jsx

@@ -1,7 +1,9 @@
 import { useState } from "react";
 import Arrow from "../components/Arrow";
+import { useNavigate } from "react-router-dom";
 
 export default function CardItem({ item, onAddToCart }) {
+  const navigate = useNavigate();
   const isPiece = item.unit_type === "piece";
   const step = isPiece ? 1 : 0.1;
   const minValue = isPiece ? 1 : 0.1;
@@ -20,7 +22,10 @@ export default function CardItem({ item, onAddToCart }) {
 
   return (
     <div className="flex flex-col text-white w-full">
-      <div className="w-full rounded-md overflow-hidden bg-slate-800/60 flex h-[400px] md:h-[600px] flex-col items-center justify-center border border-slate-700/50 select-none">
+      <div
+        className="w-full rounded-md overflow-hidden bg-slate-800/60 flex h-[400px] md:h-[600px] flex-col items-center justify-center border border-slate-700/50 select-none cursor-pointer"
+        onClick={() => navigate(`/items/${item.id}`)}
+      >
         <img
           src={item.avatar_url}
           alt={item.name}

frontend/src/pages/Cart.jsx

@@ -1,7 +1,10 @@
 import { useState, useEffect } from "react";
 import PageLayout from "../components/PageLayout";
 import { getCart, removeFromCart, createOrder } from "../api/index";
+import { useNavigate } from "react-router-dom";
+
 export default function Cart() {
+  const navigate = useNavigate();
   const [items, setItems] = useState([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState(null);
@@ -63,7 +66,8 @@ export default function Cart() {
                 <img
                   src={`/static/items/${ci.item.avatar_url}`}
                   alt={ci.item.name}
-                  className="w-20 md:w-40 h-20 md:h-40 object-cover rounded-md shrink-0"
+                  className="w-20 md:w-40 h-20 md:h-40 object-cover rounded-md shrink-0 cursor-pointer"
+                  onClick={() => navigate(`/items/${ci.item.id}`)}
                 />
                 <div className="grow">
                   <p className="font-medium text-base md:text-lg">

frontend/src/pages/ItemPage.jsx

@@ -0,0 +1,150 @@
+import PageLayout from "../components/PageLayout";
+import { useState, useEffect } from "react";
+import { useParams } from "react-router-dom";
+import { getItem, addToCart } from "../api/index";
+import Arrow from "../components/Arrow";
+
+export default function ItemPage() {
+  const { id } = useParams();
+  const [item, setItem] = useState(null);
+  const [loading, setLoading] = useState(true);
+  const [quantity, setQuantity] = useState(1);
+
+  useEffect(() => {
+    getItem(id)
+      .then((res) => setItem(res.data))
+      .catch(() => { })
+      .finally(() => setLoading(false));
+  }, [id]);
+
+  const isPiece = item?.unit_type === "piece";
+  const step = isPiece ? 1 : 0.1;
+  const minValue = isPiece ? 1 : 0.1;
+
+  useEffect(() => {
+    if (item) setQuantity(isPiece ? 1 : 0.1);
+  }, [item, isPiece]);
+
+  const handleIncrement = () => {
+    setQuantity((prev) => parseFloat((prev + step).toFixed(3)));
+  };
+  const handleDecrement = () => {
+    setQuantity((prev) =>
+      prev > minValue ? parseFloat((prev - step).toFixed(3)) : minValue,
+    );
+  };
+
+  const handleAddToCart = async () => {
+    try {
+      await addToCart({ item_id: item.id, quantity });
+      alert(`${item.name} добавлен в корзину`);
+    } catch {
+      alert("Не удалось добавить товар в корзину");
+    }
+  };
+
+  if (loading) {
+    return (
+      <PageLayout>
+        <p className="text-white p-6 md:p-16">Загрузка...</p>
+      </PageLayout>
+    );
+  }
+
+  if (!item) {
+    return (
+      <PageLayout>
+        <p className="text-white p-6 md:p-16">Товар не найден</p>
+      </PageLayout>
+    );
+  }
+
+  return (
+    <PageLayout>
+      <main className="px-6 md:px-16 grow w-full mb-10 text-white">
+        <div className="flex flex-col md:flex-row gap-8 md:gap-12 mt-6">
+          {/* ЛЕВО — фото */}
+          <div className="md:w-1/2">
+            <img
+              src={item.avatar_url}
+              alt={item.name}
+              className="w-full h-[300px] md:h-[500px] object-cover rounded-lg"
+            />
+          </div>
+
+          {/* ПРАВО — всё инфо в одной колонке */}
+          <div className="md:w-1/2 flex flex-col">
+            <h1 className="text-2xl md:text-4xl font-medium uppercase mb-3">
+              {item.name}
+            </h1>
+
+            <p className="text-2xl md:text-3xl font-medium mb-6">
+              {item.price} ₽
+              <span className="text-base text-white/50"> / {item.unit}</span>
+            </p>
+
+            <div className="flex flex-col gap-2 text-white/70 text-sm md:text-base mb-8">
+              <div className="flex justify-between border-b border-white/10 pb-2">
+                <span className="text-white/50">Категория</span>
+                <span>{item.category}</span>
+              </div>
+              <div className="flex justify-between border-b border-white/10 pb-2">
+                <span className="text-white/50">Город</span>
+                <span>{item.city}</span>
+              </div>
+              <div className="flex justify-between border-b border-white/10 pb-2">
+                <span className="text-white/50">Тип</span>
+                <span>{isPiece ? "Поштучно" : "На вес"}</span>
+              </div>
+              <div className="flex justify-between border-b border-white/10 pb-2">
+                <span className="text-white/50">В наличии</span>
+                <span
+                  className={item.stock > 0 ? "text-green-400" : "text-red-400"}
+                >
+                  {item.stock > 0 ? `${item.stock} ${item.unit}` : "нет"}
+                </span>
+              </div>
+            </div>
+
+            <div className="flex items-center gap-6 mb-6">
+              <span className="text-white/50 text-sm">Количество:</span>
+              <button
+                onClick={handleDecrement}
+                className="w-10 h-10 flex items-center justify-center bg-white/10 hover:bg-white/20 rounded font-medium text-xl cursor-pointer select-none transition-colors"
+              >
+                -
+              </button>
+              <span className="mx-2 font-mono text-sm min-w-20 text-center">
+                {quantity} {item.unit}
+              </span>
+              <button
+                onClick={handleIncrement}
+                className="w-10 h-10 flex items-center justify-center bg-white/10 hover:bg-white/20 rounded font-medium text-xl cursor-pointer select-none transition-colors"
+              >
+                +
+              </button>
+            </div>
+
+            <p className="text-lg mb-6">
+              Стоимость:{" "}
+              <span className="font-medium">
+                {parseFloat((quantity * item.price).toFixed(2))} ₽
+              </span>
+            </p>
+
+            <button
+              onClick={handleAddToCart}
+              disabled={item.stock <= 0}
+              className="group flex items-center gap-4 text-base font-bold text-white cursor-pointer disabled:opacity-40 disabled:cursor-not-allowed"
+            >
+              <span>
+                {item.stock > 0 ? "Добавить в корзину" : "Нет в наличии"}
+              </span>
+              <Arrow />
+            </button>
+          </div>
+        </div>
+      </main>
+    </PageLayout>
+  );
+}

frontend/src/pages/Profile.jsx

@@ -97,7 +97,8 @@ export default function Profile() {
                         <img
                           src={`/static/items/${oi.item?.avatar_url}`}
                           alt={oi.item?.name}
-                          className="w-10 h-10 object-cover rounded shrink-0"
+                          className="w-10 h-10 md:w-30 md:h-30 object-cover rounded shrink-0 cursor-pointer"
+                          onClick={() => navigate(`/items/${oi.item.id}`)}
                         />
                         <span className="grow">{oi.item?.name}</span>
                         <span className="whitespace-nowrap shrink-0">