Add MainActivity

app/src/main/AndroidManifest.xml

@@ -8,6 +8,10 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.TSUDesk" />
+        android:theme="@style/Theme.TSUDesk">
+        <activity
+            android:name=".MainActivity"
+            android:exported="false" />
+    </application>
 
 </manifest>

app/src/main/java/ru/fincode/tsudesk/MainActivity.kt

@@ -0,0 +1,28 @@
+package ru.fincode.tsudesk
+
+import android.os.Bundle
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class MainActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_main)
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+            insets
+        }
+        val okHttpClient = HttpClientProvider.provide()
+
+        val retrofit = RetrofitProvider.provide(
+            baseUrl = NetworkConstants.BASE_URL,
+            client = okHttpClient
+        )
+
+        val api = retrofit.create(ScheduleApi::class.java)
+    }
+}

app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+</androidx.constraintlayout.widget.ConstraintLayout>