fix: generate new nickname if NicknameEditor loses focus with blank value

app/src/main/java/com/bitchat/android/ui/ChatHeader.kt

@@ -14,6 +14,7 @@ import androidx.compose.runtime.*
 import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.onFocusChanged
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.SolidColor
 import androidx.compose.ui.platform.LocalFocusManager
@@ -23,6 +24,7 @@ import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.bitchat.android.core.ui.utils.singleOrTripleClickable
+import com.bitchat.android.util.NicknameUtils
 
 /**
  * Header components for ChatScreen
@@ -92,7 +94,8 @@ fun NicknameEditor(
 ) {
     val colorScheme = MaterialTheme.colorScheme
     val focusManager = LocalFocusManager.current
-
+    val isFocused = remember { mutableStateOf(false) }
+
     Row(
         verticalAlignment = Alignment.CenterVertically,
         modifier = modifier
@@ -117,7 +120,14 @@ fun NicknameEditor(
                     focusManager.clearFocus()
                 }
             ),
-            modifier = Modifier.widthIn(max = 100.dp)
+            modifier = Modifier
+                .widthIn(max = 100.dp)
+                .onFocusChanged { focusState ->
+                    isFocused.value = focusState.isFocused
+                    if (!focusState.isFocused && value.isBlank()) {
+                        onValueChange(NicknameUtils.generateRandomNickname())
+                    }
+                }
         )
     }
 }

app/src/main/java/com/bitchat/android/ui/ChatViewModel.kt

@@ -1,7 +1,6 @@
 package com.bitchat.android.ui
 
 import android.app.Application
-import android.content.Context
 import android.util.Log
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.LiveData
@@ -11,10 +10,10 @@ import com.bitchat.android.mesh.BluetoothMeshService
 import com.bitchat.android.model.BitchatMessage
 import com.bitchat.android.model.DeliveryAck
 import com.bitchat.android.model.ReadReceipt
-import kotlinx.coroutines.launch
+import com.bitchat.android.util.NicknameUtils
 import kotlinx.coroutines.delay
-import java.util.*
-import kotlin.random.Random
+import kotlinx.coroutines.launch
+import java.util.Date
 
 /**
  * Refactored ChatViewModel - Main coordinator for bitchat functionality
@@ -427,7 +426,7 @@ class ChatViewModel(
         notificationManager.clearAllNotifications()
 
         // Reset nickname
-        val newNickname = "anon${Random.nextInt(1000, 9999)}"
+        val newNickname = NicknameUtils.generateRandomNickname()
         state.setNickname(newNickname)
         dataManager.saveNickname(newNickname)
 

app/src/main/java/com/bitchat/android/ui/DataManager.kt

@@ -4,7 +4,7 @@ import android.content.Context
 import android.content.SharedPreferences
 import android.util.Log
 import com.google.gson.Gson
-import kotlin.random.Random
+import com.bitchat.android.util.NicknameUtils
 
 /**
  * Handles data persistence operations for the chat system
@@ -36,7 +36,7 @@ class DataManager(private val context: Context) {
         return if (savedNickname != null) {
             savedNickname
         } else {
-            val randomNickname = "anon${Random.nextInt(1000, 9999)}"
+            val randomNickname = NicknameUtils.generateRandomNickname()
             saveNickname(randomNickname)
             randomNickname
         }

app/src/main/java/com/bitchat/android/util/NicknameUtils.kt

@@ -0,0 +1,9 @@
+package com.bitchat.android.util
+
+import kotlin.random.Random
+
+object NicknameUtils {
+    fun generateRandomNickname(): String {
+        return "anon${Random.nextInt(1000, 9999)}"
+    }
+}