Fixes issue #84,

- Add MaterialToolbar with AppBarLayout to MainActivity layout
- Update themes to use NoActionBar parent for custom toolbar
- Enable fitsSystemWindows for proper system bar handling
- Adjust fragment container layout to prevent content overlap

Author: gurnoorpannu

app/src/main/java/com/amrdeveloper/linkhub/ui/MainActivity.kt

@@ -6,8 +6,12 @@ import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.core.os.bundleOf
+import androidx.navigation.fragment.NavHostFragment
+import androidx.navigation.ui.AppBarConfiguration
+import androidx.navigation.ui.setupWithNavController
 import com.amrdeveloper.linkhub.R
 import com.amrdeveloper.linkhub.data.Theme
+import com.amrdeveloper.linkhub.databinding.ActivityMainBinding
 import com.amrdeveloper.linkhub.util.ACTION_CREATE_FOLDER
 import com.amrdeveloper.linkhub.util.ACTION_CREATE_LINK
 import com.amrdeveloper.linkhub.util.UiPreferences
@@ -21,10 +25,14 @@ class MainActivity : AppCompatActivity() {
     @Inject
     lateinit var uiPreferences: UiPreferences
 
+    private lateinit var binding: ActivityMainBinding
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
 
+        setupToolbar()
         handleMultiThemeOption()
 
         if (uiPreferences.isPasswordEnabled()) {
@@ -34,6 +42,10 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
+    private fun setupToolbar() {
+        setSupportActionBar(binding.toolbar)
+    }
+
     fun handleLinkHubIntent() {
         when (intent.action) {
             Intent.ACTION_VIEW -> return

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

@@ -5,14 +5,32 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
-    tools:context=".ui.MainActivity"
-    tools:viewBindingIgnore="true">
+    android:fitsSystemWindows="true"
+    tools:context=".ui.MainActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/app_bar_layout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/ThemeOverlay.Material3.ActionBar">
+
+        <com.google.android.material.appbar.MaterialToolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:background="?attr/colorPrimary"
+            app:title="@string/app_name"
+            app:titleTextColor="?attr/colorOnPrimary"
+            app:navigationIconTint="?attr/colorOnPrimary" />
+
+    </com.google.android.material.appbar.AppBarLayout>
 
     <androidx.fragment.app.FragmentContainerView
         android:id="@+id/nav_host_fragment"
         android:name="androidx.navigation.fragment.NavHostFragment"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
         app:defaultNavHost="true"
         app:navGraph="@navigation/nav_graph" />
 

app/src/main/res/values/themes.xml

@@ -1,6 +1,6 @@
 <resources xmlns:tools="http://schemas.android.com/tools">
 
-    <style name="Theme.LinkHub" parent="Theme.Material3.Light">
+    <style name="Theme.LinkHub" parent="Theme.Material3.Light.NoActionBar">
         <!-- Primary brand color. -->
         <item name="colorPrimary">@color/white</item>
         <item name="colorPrimaryVariant">@color/white</item>