diff --git a/app/src/main/java/com/zyzf/coffeepreorder/CoffeeApplication.kt b/app/src/main/java/com/zyzf/coffeepreorder/CoffeeApplication.kt
index 457cbc1..ce12640 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/CoffeeApplication.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/CoffeeApplication.kt
@@ -3,7 +3,6 @@ package com.zyzf.coffeepreorder
 import android.app.Application
 import com.zyzf.coffeepreorder.database.AppContainer
 import com.zyzf.coffeepreorder.database.AppDataContainer
-import com.zyzf.coffeepreorder.database.model.Coffee
 import com.zyzf.coffeepreorder.database.model.User
 
 class CoffeeApplication : Application() {
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/MainComposeActivity.kt b/app/src/main/java/com/zyzf/coffeepreorder/MainComposeActivity.kt
index 3fadc1c..dffe05c 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/MainComposeActivity.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/MainComposeActivity.kt
@@ -1,15 +1,12 @@
 package com.zyzf.coffeepreorder
 
-import android.content.res.Configuration
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
-import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.tooling.preview.Preview
 import com.zyzf.coffeepreorder.ui.navigation.MainNavbar
 import com.zyzf.coffeepreorder.ui.theme.CoffeePreorderTheme
 
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/api/user/RestUserRepository.kt b/app/src/main/java/com/zyzf/coffeepreorder/api/user/RestUserRepository.kt
index 16c051a..03a1ecd 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/api/user/RestUserRepository.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/api/user/RestUserRepository.kt
@@ -6,18 +6,11 @@ import androidx.paging.Pager
 import androidx.paging.PagingConfig
 import androidx.paging.PagingData
 import com.zyzf.coffeepreorder.api.MyServerService
-import com.zyzf.coffeepreorder.api.coffee.CoffeeRemoteMediator
-import com.zyzf.coffeepreorder.api.model.UserRemote
-import com.zyzf.coffeepreorder.api.model.toCoffee
-import com.zyzf.coffeepreorder.api.model.toCoffeeRemote
 import com.zyzf.coffeepreorder.api.model.toUser
 import com.zyzf.coffeepreorder.api.model.toUserRemote
 import com.zyzf.coffeepreorder.database.AppContainer
 import com.zyzf.coffeepreorder.database.AppDatabase
-import com.zyzf.coffeepreorder.database.model.Coffee
 import com.zyzf.coffeepreorder.database.model.User
-import com.zyzf.coffeepreorder.database.repository.CoffeeRepository
-import com.zyzf.coffeepreorder.database.repository.OfflineCoffeeRepository
 import com.zyzf.coffeepreorder.database.repository.OfflineRemoteKeyRepository
 import com.zyzf.coffeepreorder.database.repository.OfflineUserRepository
 import com.zyzf.coffeepreorder.database.repository.UserRepository
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/api/user/UserRemoteMediator.kt b/app/src/main/java/com/zyzf/coffeepreorder/api/user/UserRemoteMediator.kt
index db24acb..e3a2499 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/api/user/UserRemoteMediator.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/api/user/UserRemoteMediator.kt
@@ -6,14 +6,11 @@ import androidx.paging.PagingState
 import androidx.paging.RemoteMediator
 import androidx.room.withTransaction
 import com.zyzf.coffeepreorder.api.MyServerService
-import com.zyzf.coffeepreorder.api.model.toCoffee
 import com.zyzf.coffeepreorder.api.model.toUser
 import com.zyzf.coffeepreorder.database.AppDatabase
-import com.zyzf.coffeepreorder.database.model.Coffee
 import com.zyzf.coffeepreorder.database.model.RemoteKeyType
 import com.zyzf.coffeepreorder.database.model.RemoteKeys
 import com.zyzf.coffeepreorder.database.model.User
-import com.zyzf.coffeepreorder.database.repository.OfflineCoffeeRepository
 import com.zyzf.coffeepreorder.database.repository.OfflineRemoteKeyRepository
 import com.zyzf.coffeepreorder.database.repository.OfflineUserRepository
 import retrofit2.HttpException
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/database/dao/UserDao.kt b/app/src/main/java/com/zyzf/coffeepreorder/database/dao/UserDao.kt
index 4f9c1e1..cc1884b 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/database/dao/UserDao.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/database/dao/UserDao.kt
@@ -6,10 +6,7 @@ import androidx.room.Delete
 import androidx.room.Insert
 import androidx.room.Query
 import androidx.room.Update
-import com.zyzf.coffeepreorder.api.user.RestUserRepository
-import com.zyzf.coffeepreorder.database.model.Coffee
 import com.zyzf.coffeepreorder.database.model.User
-import kotlinx.coroutines.flow.Flow
 
 @Dao
 interface UserDao {
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/database/model/Cart.kt b/app/src/main/java/com/zyzf/coffeepreorder/database/model/Cart.kt
index b031660..ac9a86c 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/database/model/Cart.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/database/model/Cart.kt
@@ -35,8 +35,7 @@ data class Cart(
         other as Cart
         if (uid != other.uid) return false
         if (coffeeId != other.coffeeId) return false
-        if (count != other.count) return false
-        return true
+        return count == other.count
     }
 
     override fun hashCode(): Int {
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/database/model/Coffee.kt b/app/src/main/java/com/zyzf/coffeepreorder/database/model/Coffee.kt
index 5dcac82..2cd4142 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/database/model/Coffee.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/database/model/Coffee.kt
@@ -41,8 +41,7 @@ data class Coffee(
         if (uid != other.uid) return false
         if (name != other.name) return false
         if (cost != other.cost) return false
-        if (ingredients != other.ingredients) return false
-        return true
+        return ingredients == other.ingredients
     }
 
     override fun hashCode(): Int {
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/database/model/User.kt b/app/src/main/java/com/zyzf/coffeepreorder/database/model/User.kt
index 21dea05..c044e5f 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/database/model/User.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/database/model/User.kt
@@ -51,8 +51,7 @@ data class User(
         if (fio != other.fio) return false
         if (phone != other.phone) return false
         if (password != other.password) return false
-        if (role != other.role) return false
-        return true
+        return role == other.role
     }
 
     override fun hashCode(): Int {
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/database/repository/OfflineUserRepository.kt b/app/src/main/java/com/zyzf/coffeepreorder/database/repository/OfflineUserRepository.kt
index 40df1f5..d84de96 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/database/repository/OfflineUserRepository.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/database/repository/OfflineUserRepository.kt
@@ -6,7 +6,6 @@ import androidx.paging.PagingData
 import androidx.paging.PagingSource
 import com.zyzf.coffeepreorder.database.AppContainer
 import com.zyzf.coffeepreorder.database.dao.UserDao
-import com.zyzf.coffeepreorder.database.model.Coffee
 import com.zyzf.coffeepreorder.database.model.User
 import kotlinx.coroutines.flow.Flow
 
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/ui/cart/Cart.kt b/app/src/main/java/com/zyzf/coffeepreorder/ui/cart/Cart.kt
index aadc424..ef411c0 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/ui/cart/Cart.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/ui/cart/Cart.kt
@@ -6,7 +6,6 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
@@ -96,7 +95,7 @@ fun Cart(
         }
     ) { innerPadding ->
         Box (modifier = Modifier
-            .padding(0.dp)
+            .padding(innerPadding)
             .pullRefresh(state)) {
             PullRefreshIndicator(refreshing = refreshing, state = state,
                 modifier = Modifier
@@ -104,34 +103,27 @@ fun Cart(
                     .align(Alignment.TopCenter)
             )
             CartList(
-                modifier = Modifier
-                    .padding(innerPadding)
-                    .pullRefresh(state)
-                    .fillMaxSize(),
                 coffeeList = coffeeListUiState,
                 onDeleteFromCartClick = {currentCoffee: Coffee ->
                     coffee.value = currentCoffee
                     openDialog.value = true
-                },
-                getCoffeeCount = {coffeeId: Int ->
-                    viewModel.getCountForCoffee(coffeeId)
                 }
-            )
+            ) { coffeeId: Int ->
+                viewModel.getCountForCoffee(coffeeId)
+            }
         }
     }
     DeleteFromCartAlertDialog(
-        openDialog = openDialog,
-        onConfirmClick = {
-            coroutineScope.launch {
-                viewModel.deleteCoffeeFromCart(coffee.value)
-            }
+        openDialog = openDialog
+    ) {
+        coroutineScope.launch {
+            viewModel.deleteCoffeeFromCart(coffee.value)
         }
-    )
+    }
 }
 
 @Composable
 private fun CartList(
-    modifier: Modifier = Modifier,
     coffeeList: LazyPagingItems<Coffee>,
     onDeleteFromCartClick: (coffee: Coffee) -> Unit,
     getCoffeeCount: (coffeeId: Int) -> Double
@@ -158,7 +150,6 @@ private fun CartList(
 @Composable
 private fun CartListItem (
     coffee: Coffee,
-    modifier: Modifier = Modifier,
     onDeleteFromCartClick: (coffee: Coffee) -> Unit,
     getCoffeeCount: (coffeeId: Int) -> Double
 ) {
@@ -219,7 +210,6 @@ private fun CartListItem (
 
 @Composable
 private fun DeleteFromCartAlertDialog(
-    modifier: Modifier = Modifier,
     openDialog: MutableState<Boolean>,
     onConfirmClick: () -> Unit
 ) {
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/ui/coffee/CoffeeList.kt b/app/src/main/java/com/zyzf/coffeepreorder/ui/coffee/CoffeeList.kt
index b37fe59..016ca10 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/ui/coffee/CoffeeList.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/ui/coffee/CoffeeList.kt
@@ -15,7 +15,6 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
@@ -131,27 +130,23 @@ fun CoffeeList(
             }
         }
     ) { innerPadding ->
-        Box (modifier = Modifier.padding(0.dp).pullRefresh(state)) {
+        Box (modifier = Modifier.padding(innerPadding).pullRefresh(state)) {
             PullRefreshIndicator(refreshing = refreshing, state = state,
                 modifier = Modifier.zIndex(100f).align(Alignment.TopCenter)
             )
             CoffeeList(
-                modifier = Modifier
-                    .padding(innerPadding)
-                    .fillMaxSize(),
                 coffeeList = coffeeListUiState,
                 onAddToCartClick = { coffeeUid: Int ->
                     coroutineScope.launch {
                         viewModel.addCoffeeToCart(coffeeUid = coffeeUid)
                     }
-                },
-                onEditClick = { currentCoffee: Coffee ->
-                    coroutineScope.launch {
-                        coffee.value = currentCoffee
-                        openDialog.value = true
-                    }
                 }
-            )
+            ) { currentCoffee: Coffee ->
+                coroutineScope.launch {
+                    coffee.value = currentCoffee
+                    openDialog.value = true
+                }
+            }
         }
     }
     AddEditModalBottomSheet(
@@ -290,7 +285,6 @@ private fun AddEditModalBottomSheet(
 
 @Composable
 private fun CoffeeList(
-    modifier: Modifier = Modifier,
     coffeeList: LazyPagingItems<Coffee>,
     onAddToCartClick: (coffeeUid: Int) -> Unit,
     onEditClick: (coffee: Coffee) -> Unit
@@ -304,7 +298,11 @@ private fun CoffeeList(
         ) {index ->
             val coffee = coffeeList[index]
             coffee?.let {
-                CoffeeListItem(coffee = coffee, onAddToCartClick = onAddToCartClick, onEditClick = onEditClick)
+                CoffeeListItem(
+                    coffee = coffee,
+                    onAddToCartClick = onAddToCartClick,
+                    onEditClick = onEditClick
+                )
             }
         }
     }
@@ -313,7 +311,6 @@ private fun CoffeeList(
 @Composable
 private fun CoffeeListItem(
     coffee: Coffee,
-    modifier: Modifier = Modifier,
     onAddToCartClick: (coffeeUid: Int) -> Unit,
     onEditClick: (coffee: Coffee) -> Unit
 ) {
@@ -395,9 +392,8 @@ fun CoffeeListPreview() {
                 coffeeList = MutableStateFlow(
                     PagingData.from((1..20).map { i -> Coffee.getCoffee(i) })
                 ).collectAsLazyPagingItems(),
-                onAddToCartClick = {},
-                onEditClick = {}
-            )
+                onAddToCartClick = {}
+            ) {}
         }
     }
 }
@@ -415,9 +411,8 @@ fun CoffeeEmptyListPreview() {
                 coffeeList = MutableStateFlow(
                     PagingData.empty<Coffee>()
                 ).collectAsLazyPagingItems(),
-                onAddToCartClick = {},
-                onEditClick = {}
-            )
+                onAddToCartClick = {}
+            ) {}
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/ui/login/Login.kt b/app/src/main/java/com/zyzf/coffeepreorder/ui/login/Login.kt
index 6ad308c..c555a98 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/ui/login/Login.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/ui/login/Login.kt
@@ -44,17 +44,13 @@ import com.zyzf.coffeepreorder.R
 import com.zyzf.coffeepreorder.database.AppDatabase
 import com.zyzf.coffeepreorder.database.model.User
 import com.zyzf.coffeepreorder.ui.AppViewModelProvider
-import com.zyzf.coffeepreorder.ui.coffee.CoffeeListViewModel
 import com.zyzf.coffeepreorder.ui.navigation.Screen
 import com.zyzf.coffeepreorder.ui.theme.CoffeePreorderTheme
 import kotlinx.coroutines.DelicateCoroutinesApi
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
-@OptIn(DelicateCoroutinesApi::class)
 @Composable
 fun Login(
     navController: NavController?,
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/ui/login/LoginViewModel.kt b/app/src/main/java/com/zyzf/coffeepreorder/ui/login/LoginViewModel.kt
index 1b14407..5e2bcff 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/ui/login/LoginViewModel.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/ui/login/LoginViewModel.kt
@@ -1,7 +1,6 @@
 package com.zyzf.coffeepreorder.ui.login
 
 import androidx.lifecycle.ViewModel
-import com.zyzf.coffeepreorder.api.user.RestUserRepository
 import com.zyzf.coffeepreorder.database.model.User
 import com.zyzf.coffeepreorder.database.repository.UserRepository
 
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/ui/profile/Profile.kt b/app/src/main/java/com/zyzf/coffeepreorder/ui/profile/Profile.kt
index 97a82fe..6e03c48 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/ui/profile/Profile.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/ui/profile/Profile.kt
@@ -195,7 +195,8 @@ fun Profile(navController: NavController?) {
                     onClick = {
                         GlobalScope.launch (Dispatchers.Main) {
                             if (userOldPsswd.value == user.password && userNewPsswd.value == userNewPsswdConf.value) {
-                                val userUid: Int? = AppDatabase.getInstance(context).userDao().update(User(user.uid!!, userLogin, userFIO, userPhone, userNewPsswd.value, user.role))
+                                val userUid: Int? = AppDatabase.getInstance(context).userDao().update(User(
+                                    user.uid, userLogin, userFIO, userPhone, userNewPsswd.value, user.role))
                                 user = AppDatabase.getInstance(context).userDao().getByUid(userUid!!)!!
                                 CoffeeApplication.currentUser = user
                             }
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/ui/register/Register.kt b/app/src/main/java/com/zyzf/coffeepreorder/ui/register/Register.kt
index ce05e41..3694728 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/ui/register/Register.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/ui/register/Register.kt
@@ -40,25 +40,19 @@ import coil.compose.AsyncImage
 import coil.request.ImageRequest
 import com.zyzf.coffeepreorder.CoffeeApplication
 import com.zyzf.coffeepreorder.R
-import com.zyzf.coffeepreorder.database.AppDatabase
 import com.zyzf.coffeepreorder.database.model.User
 import com.zyzf.coffeepreorder.ui.AppViewModelProvider
-import com.zyzf.coffeepreorder.ui.login.LoginViewModel
 import com.zyzf.coffeepreorder.ui.navigation.Screen
 import com.zyzf.coffeepreorder.ui.theme.CoffeePreorderTheme
 import kotlinx.coroutines.DelicateCoroutinesApi
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.launch
 
-@OptIn(DelicateCoroutinesApi::class)
 @Composable
 fun Register(
     navController: NavController?,
     viewModel: RegisterViewModel = viewModel(factory = AppViewModelProvider.Factory)
     ) {
-    val context = LocalContext.current
     val coroutineScope = rememberCoroutineScope()
     var login: String by remember { mutableStateOf("") }
     var fio: String by remember { mutableStateOf("") }
diff --git a/app/src/main/java/com/zyzf/coffeepreorder/ui/register/RegisterViewModel.kt b/app/src/main/java/com/zyzf/coffeepreorder/ui/register/RegisterViewModel.kt
index d0dcf7b..af518f5 100644
--- a/app/src/main/java/com/zyzf/coffeepreorder/ui/register/RegisterViewModel.kt
+++ b/app/src/main/java/com/zyzf/coffeepreorder/ui/register/RegisterViewModel.kt
@@ -1,7 +1,6 @@
 package com.zyzf.coffeepreorder.ui.register
 
 import androidx.lifecycle.ViewModel
-import com.zyzf.coffeepreorder.database.AppDatabase
 import com.zyzf.coffeepreorder.database.model.User
 import com.zyzf.coffeepreorder.database.repository.UserRepository
 
diff --git a/app/src/main/res/drawable/coffee_image.png b/app/src/main/res/drawable/coffee_image.png
deleted file mode 100644
index c82e432..0000000
Binary files a/app/src/main/res/drawable/coffee_image.png and /dev/null differ
diff --git a/app/src/main/res/drawable/ic_connection_error.xml b/app/src/main/res/drawable/ic_connection_error.xml
deleted file mode 100644
index a961d63..0000000
--- a/app/src/main/res/drawable/ic_connection_error.xml
+++ /dev/null
@@ -1,25 +0,0 @@
-<!--
-  ~ Copyright (C) 2023 The Android Open Source Project
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~     https://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  -->
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="100dp"
-    android:height="100dp"
-    android:tint="#A9A9AC"
-    android:viewportWidth="24.0"
-    android:viewportHeight="24.0">
-    <path
-        android:fillColor="#A9A9AC"
-        android:pathData="M19.35,10.04C18.67,6.59 15.64,4 12,4c-1.48,0 -2.85,0.43 -4.01,1.17l1.46,1.46C10.21,6.23 11.08,6 12,6c3.04,0 5.5,2.46 5.5,5.5v0.5H19c1.66,0 3,1.34 3,3 0,1.13 -0.64,2.11 -1.56,2.62l1.45,1.45C23.16,18.16 24,16.68 24,15c0,-2.64 -2.05,-4.78 -4.65,-4.96zM3,5.27l2.75,2.74C2.56,8.15 0,10.77 0,14c0,3.31 2.69,6 6,6h11.73l2,2L21,20.73 4.27,4 3,5.27zM7.73,10l8,8H6c-2.21,0 -4,-1.79 -4,-4s1.79,-4 4,-4h1.73z" />
-</vector>
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index f8c6127..a6b3dae 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -1,10 +1,2 @@
 <?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="purple_200">#FFBB86FC</color>
-    <color name="purple_500">#FF6200EE</color>
-    <color name="purple_700">#FF3700B3</color>
-    <color name="teal_200">#FF03DAC5</color>
-    <color name="teal_700">#FF018786</color>
-    <color name="black">#FF000000</color>
-    <color name="white">#FFFFFFFF</color>
-</resources>
\ No newline at end of file
+<resources></resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index c493969..6f4c641 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -8,7 +8,6 @@
     <string name="coffee_name">Название</string>
     <string name="coffee_cost">Стоимость</string>
     <string name="coffee_ingredients">Ингредиенты</string>
-    <string name="coffee_view_title">Изменить кофе</string>
 
     <string name="profile_title">Профиль</string>
     <string name="profile_login_label">Логин</string>
@@ -19,17 +18,4 @@
     <string name="profile_newpassw_label">Новый пароль</string>
     <string name="profile_confpassw_label">Подтверждение пароля</string>
 
-    <string name="student_firstname">Имя</string>
-    <string name="student_lastname">Фамилия</string>
-    <string name="student_group">Группа</string>
-    <string name="student_phone">Телефон</string>
-    <string name="student_email">e-mail</string>
-    <string name="student_main_title">Список студентов</string>
-    <string name="student_view_title">Профиль студента</string>
-    <string name="about_title">О нас</string>
-    <string name="about_text">
-        <p>Это текст <b>о нас</b>!</p>\n\n
-        <p>Здесь могла быть Ваша реклама!</p>\n\n
-        <p>Наш сайт <a href="https://ulstu.ru">ulstu.ru</a></p>
-    </string>
 </resources>
\ No newline at end of file
diff --git a/backend/build.gradle b/backend/build.gradle
index f86170e..0c07ab8 100644
--- a/backend/build.gradle
+++ b/backend/build.gradle
@@ -6,7 +6,6 @@ plugins {
 
 group = 'com.kalyshev'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '17'
 
 repositories {
 	mavenCentral()
@@ -28,3 +27,5 @@ dependencies {
 tasks.named('test') {
 	useJUnitPlatform()
 }
+
+java.targetCompatibility = JavaVersion.VERSION_17
\ No newline at end of file
diff --git a/backend/src/main/java/com/kalyshev/yan/coffee/controller/CoffeeController.java b/backend/src/main/java/com/kalyshev/yan/coffee/controller/CoffeeController.java
index ee62444..2de860b 100644
--- a/backend/src/main/java/com/kalyshev/yan/coffee/controller/CoffeeController.java
+++ b/backend/src/main/java/com/kalyshev/yan/coffee/controller/CoffeeController.java
@@ -2,7 +2,6 @@ package com.kalyshev.yan.coffee.controller;
 
 import com.kalyshev.yan.WebConfiguration;
 import com.kalyshev.yan.coffee.service.CoffeeService;
-import com.kalyshev.yan.user.model.User;
 import jakarta.validation.Valid;
 import org.springframework.web.bind.annotation.*;
 
diff --git a/backend/src/main/java/com/kalyshev/yan/coffee/controller/CoffeeDto.java b/backend/src/main/java/com/kalyshev/yan/coffee/controller/CoffeeDto.java
index d43b824..06a6df5 100644
--- a/backend/src/main/java/com/kalyshev/yan/coffee/controller/CoffeeDto.java
+++ b/backend/src/main/java/com/kalyshev/yan/coffee/controller/CoffeeDto.java
@@ -1,8 +1,6 @@
 package com.kalyshev.yan.coffee.controller;
 
 import com.kalyshev.yan.coffee.model.Coffee;
-import lombok.Getter;
-import lombok.Setter;
 
 public class CoffeeDto {
     private Long id;
diff --git a/backend/src/main/java/com/kalyshev/yan/coffee/model/Coffee.java b/backend/src/main/java/com/kalyshev/yan/coffee/model/Coffee.java
index be7b99e..83bedc7 100644
--- a/backend/src/main/java/com/kalyshev/yan/coffee/model/Coffee.java
+++ b/backend/src/main/java/com/kalyshev/yan/coffee/model/Coffee.java
@@ -4,8 +4,6 @@ import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.Id;
 import jakarta.persistence.Table;
-import lombok.Getter;
-import lombok.Setter;
 
 import java.util.Objects;
 
diff --git a/backend/src/main/java/com/kalyshev/yan/coffee/service/CoffeeService.java b/backend/src/main/java/com/kalyshev/yan/coffee/service/CoffeeService.java
index 4b82906..66077ae 100644
--- a/backend/src/main/java/com/kalyshev/yan/coffee/service/CoffeeService.java
+++ b/backend/src/main/java/com/kalyshev/yan/coffee/service/CoffeeService.java
@@ -3,7 +3,6 @@ package com.kalyshev.yan.coffee.service;
 import com.kalyshev.yan.coffee.controller.CoffeeDto;
 import com.kalyshev.yan.coffee.model.Coffee;
 import com.kalyshev.yan.coffee.repository.CoffeeRepository;
-import com.kalyshev.yan.user.model.User;
 import com.kalyshev.yan.user.repository.UserNotFoundException;
 import com.kalyshev.yan.util.validation.ValidatorUtil;
 import org.springframework.data.domain.Page;
diff --git a/backend/src/main/java/com/kalyshev/yan/user/controller/UserDto.java b/backend/src/main/java/com/kalyshev/yan/user/controller/UserDto.java
index 5bf7833..08233f8 100644
--- a/backend/src/main/java/com/kalyshev/yan/user/controller/UserDto.java
+++ b/backend/src/main/java/com/kalyshev/yan/user/controller/UserDto.java
@@ -1,8 +1,6 @@
 package com.kalyshev.yan.user.controller;
 
 import com.kalyshev.yan.user.model.User;
-import lombok.Getter;
-import lombok.Setter;
 
 public class UserDto {
     private Long id;
diff --git a/backend/src/main/java/com/kalyshev/yan/user/model/User.java b/backend/src/main/java/com/kalyshev/yan/user/model/User.java
index 068177b..f6dc7b3 100644
--- a/backend/src/main/java/com/kalyshev/yan/user/model/User.java
+++ b/backend/src/main/java/com/kalyshev/yan/user/model/User.java
@@ -4,8 +4,6 @@ import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.Id;
 import jakarta.persistence.Table;
-import lombok.Getter;
-import lombok.Setter;
 
 import java.util.Objects;
 
diff --git a/backend/src/main/java/com/kalyshev/yan/user/service/UserService.java b/backend/src/main/java/com/kalyshev/yan/user/service/UserService.java
index c25a613..077676f 100644
--- a/backend/src/main/java/com/kalyshev/yan/user/service/UserService.java
+++ b/backend/src/main/java/com/kalyshev/yan/user/service/UserService.java
@@ -53,8 +53,7 @@ public class UserService {
     }
     @Transactional(readOnly = true)
     public Optional<User> tryLogin(String login, String password) {
-        final Optional<User> user = userRepository.tryLogin(login, password);
-        return user;
+        return userRepository.tryLogin(login, password);
     }
     @Transactional(readOnly = true)
     public List<UserDto> findAllUsers(int pageNo, int pageSize, String sortBy, String sortDir) {
@@ -69,11 +68,9 @@ public class UserService {
         // get content for page object
         List<User> listOfUsers = users.getContent();
 
-        List<UserDto> content = listOfUsers.stream()
+        return listOfUsers.stream()
                 .map(UserDto::new)
                 .toList();
-
-        return content;
     }
     @Transactional
     public User updateUser(Long id, String login, String fio, String phone, String password, String role) {
diff --git a/backend/src/test/java/com/kalyshev/yan/JpaCabinetTests.java b/backend/src/test/java/com/kalyshev/yan/JpaCabinetTests.java
deleted file mode 100644
index b889fdc..0000000
--- a/backend/src/test/java/com/kalyshev/yan/JpaCabinetTests.java
+++ /dev/null
@@ -1,64 +0,0 @@
-package com.kalyshev.yan;
-
-import com.kalyshev.yan.cabinet.model.Cabinet;
-import com.kalyshev.yan.cabinet.repository.CabinetNotFoundException;
-import com.kalyshev.yan.cabinet.service.CabinetService;
-import com.kalyshev.yan.computer.service.ComputerService;
-import com.kalyshev.yan.monitor.service.MonitorService;
-import org.junit.jupiter.api.Assertions;
-import org.junit.jupiter.api.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.context.SpringBootTest;
-
-import java.util.List;
-
-@SpringBootTest
-public class JpaCabinetTests {
-    private static final Logger log = LoggerFactory.getLogger(JpaCabinetTests.class);
-    @Autowired
-    private ComputerService computerService;
-    @Autowired
-    private MonitorService monitorService;
-    @Autowired
-    private CabinetService cabinetService;
-
-    @Test
-    void testCabinetCreate() {
-        cabinetService.deleteAllCabinets();
-        final Cabinet cabinet = cabinetService.addCabinet("18");
-        log.info(cabinet.toString());
-        Assertions.assertNotNull(cabinet.getId());
-    }
-    @Test
-    void testCabinetRead() {
-        cabinetService.deleteAllCabinets();
-        final Cabinet cabinet = cabinetService.addCabinet("18");
-        log.info(cabinet.toString());
-        final Cabinet findCabinet = cabinetService.findCabinet(cabinet.getId());
-        log.info(findCabinet.toString());
-        Assertions.assertEquals(cabinet, findCabinet);
-    }
-    @Test
-    void testCabinetReadNotFound() {
-        cabinetService.deleteAllCabinets();
-        Assertions.assertThrows(CabinetNotFoundException.class, () -> cabinetService.findCabinet(-1L));
-    }
-    @Test
-    void testCabinetReadAll() {
-        cabinetService.deleteAllCabinets();
-        cabinetService.addCabinet("18");
-        cabinetService.addCabinet("19");
-        final List<Cabinet> cabinets = cabinetService.findAllCabinets();
-        log.info(cabinets.toString());
-        Assertions.assertEquals(cabinets.size(), 2);
-    }
-    @Test
-    void testComputerReadAllEmpty() {
-        cabinetService.deleteAllCabinets();
-        final List<Cabinet> cabinets = cabinetService.findAllCabinets();
-        log.info(cabinets.toString());
-        Assertions.assertEquals(cabinets.size(), 0);
-    }
-}
diff --git a/backend/src/test/java/com/kalyshev/yan/JpaComputerCabinetTests.java b/backend/src/test/java/com/kalyshev/yan/JpaComputerCabinetTests.java
deleted file mode 100644
index 8c05d06..0000000
--- a/backend/src/test/java/com/kalyshev/yan/JpaComputerCabinetTests.java
+++ /dev/null
@@ -1,85 +0,0 @@
-package com.kalyshev.yan;
-
-import com.kalyshev.yan.cabinet.model.Cabinet;
-import com.kalyshev.yan.cabinet.service.CabinetService;
-import com.kalyshev.yan.computer.model.Computer;
-import com.kalyshev.yan.computer.service.ComputerService;
-import com.kalyshev.yan.monitor.model.Monitor;
-import com.kalyshev.yan.monitor.service.MonitorService;
-import org.junit.jupiter.api.Assertions;
-import org.junit.jupiter.api.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.context.SpringBootTest;
-
-@SpringBootTest
-public class JpaComputerCabinetTests {
-    private static final Logger log = LoggerFactory.getLogger(JpaCabinetTests.class);
-    @Autowired
-    private ComputerService computerService;
-    @Autowired
-    private MonitorService monitorService;
-    @Autowired
-    private CabinetService cabinetService;
-
-    @Test
-    void testCabinetAddOneToMany() {
-        cabinetService.deleteAllCabinets();
-        computerService.deleteAllComputers();
-        computerService.deleteAllMonitorsWithRelations();
-        final Cabinet cabinet = cabinetService.addCabinet("18");
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        final Computer computer = computerService.addComputer("PC", "78457h", monitor.getId());
-        cabinet.addComputer(computer);
-        log.info(cabinet.toString());
-        log.info(computer.toString());
-        Assertions.assertEquals(cabinet.getComputers().get(0).getSerialNum(), computer.getSerialNum());
-    }
-
-    @Test
-    void testCabinetDeleteOneToMany() {
-        cabinetService.deleteAllCabinets();
-        computerService.deleteAllComputers();
-        computerService.deleteAllMonitorsWithRelations();
-        final Cabinet cabinet = cabinetService.addCabinet("18");
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        final Computer computer = computerService.addComputer("PC", "78457h", monitor.getId());
-        cabinet.addComputer(computer);
-        log.info(cabinet.toString());
-        log.info(computer.toString());
-        Assertions.assertEquals(cabinet.getComputers().get(0).getSerialNum(), computer.getSerialNum());
-        cabinet.removeComputer(computer);
-        Assertions.assertEquals(cabinet.getComputers().size(), 0);
-    }
-
-    @Test
-    void testComputerAddManyToMany() {
-        cabinetService.deleteAllCabinets();
-        computerService.deleteAllComputers();
-        computerService.deleteAllMonitorsWithRelations();
-        final Cabinet cabinet = cabinetService.addCabinet("18");
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        final Computer computer = computerService.addComputer("PC", "78457h", monitor.getId());
-        computer.setCabinet(cabinet);
-        log.info(cabinet.toString());
-        log.info(computer.toString());
-        Assertions.assertEquals(computer.getCabinet().getNumber(), cabinet.getNumber());
-    }
-
-    @Test
-    void testComputerDeleteManyToMany() {
-        cabinetService.deleteAllCabinets();
-        computerService.deleteAllComputers();
-        computerService.deleteAllMonitorsWithRelations();
-        final Cabinet cabinet = cabinetService.addCabinet("18");
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        final Computer computer = computerService.addComputer("PC", "78457h", monitor.getId());
-        computer.setCabinet(cabinet);
-        log.info(cabinet.toString());
-        log.info(computer.toString());
-        Assertions.assertEquals(computer.getCabinet().getNumber(), cabinet.getNumber());
-        computer.setCabinet(null);
-        Assertions.assertNull(computer.getCabinet());
-    }
-}
diff --git a/backend/src/test/java/com/kalyshev/yan/JpaComputerTests.java b/backend/src/test/java/com/kalyshev/yan/JpaComputerTests.java
deleted file mode 100644
index 007d090..0000000
--- a/backend/src/test/java/com/kalyshev/yan/JpaComputerTests.java
+++ /dev/null
@@ -1,89 +0,0 @@
-package com.kalyshev.yan;
-
-import com.kalyshev.yan.cabinet.model.Cabinet;
-import com.kalyshev.yan.cabinet.service.CabinetService;
-import com.kalyshev.yan.computer.model.Computer;
-import com.kalyshev.yan.computer.repository.ComputerNotFoundException;
-import com.kalyshev.yan.computer.service.ComputerService;
-import com.kalyshev.yan.monitor.model.Monitor;
-import com.kalyshev.yan.monitor.service.MonitorService;
-import org.junit.jupiter.api.Assertions;
-import org.junit.jupiter.api.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.context.SpringBootTest;
-
-import java.util.List;
-
-@SpringBootTest
-public class JpaComputerTests {
-    private static final Logger log = LoggerFactory.getLogger(JpaComputerTests.class);
-    @Autowired
-    private ComputerService computerService;
-    @Autowired
-    private MonitorService monitorService;
-    @Autowired
-    private CabinetService cabinetService;
-
-    @Test
-    void testComputerPartialCreate() {
-        computerService.deleteAllComputers();
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        final Computer computer = computerService.addComputer("Computer", "w7894572", monitor.getId());
-        log.info(computer.toString());
-        Assertions.assertNotNull(computer.getId());
-        Assertions.assertNull(computer.getCabinet());
-    }
-    @Test
-    void testComputerFullCreate() {
-        computerService.deleteAllComputers();
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        final Cabinet cabinet = cabinetService.addCabinet("18a");
-        final Computer computer = computerService.addComputer("Computer", "w7894572", monitor.getId());
-        computer.setCabinet(cabinet);
-        log.info(computer.toString());
-        Assertions.assertNotNull(computer.getId());
-        Assertions.assertEquals(cabinet, computer.getCabinet());
-    }
-    @Test
-    void testComputerDelete() {
-        computerService.deleteAllComputers();
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        final Computer computer = computerService.addComputer("Computer", "w7894572", null);
-        log.info(computer.toString());
-        computerService.deleteComputer(computer.getId());
-        Assertions.assertThrows(ComputerNotFoundException.class, () -> computerService.findComputer(computer.getId()));
-    }
-    @Test
-    void testComputerRead() {
-        computerService.deleteAllComputers();
-        final Computer computer = computerService.addComputer("Computer", "w7894572", null);
-        log.info(computer.toString());
-        final Computer findComputer = computerService.findComputer(computer.getId());
-        log.info(findComputer.toString());
-        Assertions.assertEquals(computer, findComputer);
-    }
-    @Test
-    void testComputerReadNotFound() {
-        computerService.deleteAllComputers();
-        Assertions.assertThrows(ComputerNotFoundException.class, () -> computerService.findComputer(-1L));
-    }
-    @Test
-    void testComputerReadAll() {
-        computerService.deleteAllComputers();
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        computerService.addComputer("Computer", "w7894572", null);
-        computerService.addComputer("Another comp", "3453s", null);
-        final List<Computer> computers = computerService.findAllComputers();
-        log.info(computers.toString());
-        Assertions.assertEquals(computers.size(), 2);
-    }
-    @Test
-    void testComputerReadAllEmpty() {
-        computerService.deleteAllComputers();
-        final List<Computer> computers = computerService.findAllComputers();
-        log.info(computers.toString());
-        Assertions.assertEquals(computers.size(), 0);
-    }
-}
diff --git a/backend/src/test/java/com/kalyshev/yan/JpaMonitorTests.java b/backend/src/test/java/com/kalyshev/yan/JpaMonitorTests.java
deleted file mode 100644
index 03dc8a5..0000000
--- a/backend/src/test/java/com/kalyshev/yan/JpaMonitorTests.java
+++ /dev/null
@@ -1,78 +0,0 @@
-package com.kalyshev.yan;
-
-import com.kalyshev.yan.computer.model.Computer;
-import com.kalyshev.yan.computer.service.ComputerService;
-import com.kalyshev.yan.monitor.model.Monitor;
-import com.kalyshev.yan.monitor.repository.MonitorNotFoundException;
-import com.kalyshev.yan.monitor.service.MonitorService;
-import org.junit.jupiter.api.Assertions;
-import org.junit.jupiter.api.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.context.SpringBootTest;
-
-import java.util.List;
-@SpringBootTest
-public class JpaMonitorTests {
-    private static final Logger log = LoggerFactory.getLogger(JpaMonitorTests.class);
-    @Autowired
-    private MonitorService monitorService;
-    @Autowired
-    private ComputerService computerService;
-    @Test
-    void testMonitorCreate() {
-        computerService.deleteAllMonitorsWithRelations();
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        log.info(monitor.toString());
-        Assertions.assertNotNull(monitor.getId());
-    }
-    @Test
-    void testMonitorRead() {
-        computerService.deleteAllMonitorsWithRelations();
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        log.info(monitor.toString());
-        final Monitor findMonitor = monitorService.findMonitor(monitor.getId());
-        log.info(findMonitor.toString());
-        Assertions.assertEquals(monitor, findMonitor);
-    }
-    @Test
-    void testMonitorDelete() {
-        computerService.deleteAllMonitorsWithRelations();
-        final Monitor monitor = monitorService.addMonitor("Asus");
-        log.info(monitor.toString());
-        computerService.deleteMonitorWithRelation(monitor.getId());
-        Assertions.assertThrows(MonitorNotFoundException.class, () -> monitorService.findMonitor(monitor.getId()));
-    }
-    @Test
-    void testMonitorReadNotFound() {
-        computerService.deleteAllMonitorsWithRelations();
-        Assertions.assertThrows(MonitorNotFoundException.class, () -> monitorService.findMonitor(-1L));
-    }
-    @Test
-    void testMonitorReadAll() {
-        computerService.deleteAllMonitorsWithRelations();
-        monitorService.addMonitor("Asus");
-        monitorService.addMonitor("HP");
-        final List<Monitor> monitors = monitorService.findAllMonitors();
-        log.info(monitors.toString());
-        Assertions.assertEquals(monitors.size(), 2);
-    }
-    @Test
-    void testMonitorReadAllEmpty() {
-        computerService.deleteAllMonitorsWithRelations();
-        final List<Monitor> monitors = monitorService.findAllMonitors();
-        log.info(monitors.toString());
-        Assertions.assertEquals(monitors.size(), 0);
-    }
-    @Test
-    void testMonitorGetComputer() {
-        computerService.deleteAllMonitorsWithRelations();
-        computerService.deleteAllComputers();
-        Monitor monitor = monitorService.addMonitor("Asus");
-        Computer computer = computerService.addComputer("Model", "6sfv4", monitor.getId());
-        log.info(computer.toString());
-        Computer fetchedComputer = computerService.findComputerByMonitor(monitor);
-        Assertions.assertEquals(computer, fetchedComputer);
-    }
-}