добавил везде /

src/components/ModalRequestForm/ModalRequestForm.tsx

@@ -70,7 +70,7 @@ const ModalRequestForm: React.FC<Props> = ({ open, onClose }) => {
       ...data,
     };
 
-    const response = await client.post<{ success: boolean }>("/email", payload);
+    const response = await client.post<{ success: boolean }>("/email/", payload);
     
     return response.data.success;
   } catch (error) {

src/components/PriceLisForm/PriceLisForm.tsx

@@ -62,7 +62,7 @@ const PriceLisForm: React.FC<Props> = ({ open, onClose }) => {
 
   const sendToBackend = async (data: FormData): Promise<boolean> => {
     try{
-      const response = await client.post<{success: boolean}>("/email", {
+      const response = await client.post<{success: boolean}>("/email/", {
       ...data,
     })
 

src/features/MainPage/PhoneRequest.tsx

@@ -60,7 +60,7 @@ const PhoneRequest: React.FC<Props> = ({ onSend }) => {
         await onSend(phone);
       } else {
         
-        await client.post("/api/contact/send-phone", { phone });
+        await client.post("/api/contact/send-phone/", { phone });
       }
 
       setSuccess(true);

src/features/catalog/categoriesSlice.ts

@@ -5,7 +5,7 @@ import {client} from "../../api/client";
 export const fetchCategories = createAsyncThunk<Category[]>(
   "categories/fetchCategories",
   async () => {
-    const res = await client.get<Category[]>("/categories");
+    const res = await client.get<Category[]>("/categories/");
     return res.data;
   }
 );

src/features/catalog/productsSlice.ts

@@ -32,7 +32,7 @@ export const fetchProductsByCategory = createAsyncThunk(
         else qp.append(k, String(v));
       });
     }
-    const res = await client.get<FetchResponce>(`/products?${qp.toString()}`);
+    const res = await client.get<FetchResponce>(`/products?${qp.toString()}/`);
     // ожидаем { items: Product[], total: number, page: number, limit: number }
     return res.data;
   }
@@ -41,7 +41,7 @@ export const fetchProductsByCategory = createAsyncThunk(
 export const fetchProductById = createAsyncThunk(
   "product/fetchById",
   async (id: string) => {
-    const response = await client.get<Product>(`/products/${id}`);
+    const response = await client.get<Product>(`/products/${id}/`);
     return response.data;
   }
 );