add max history for 18 items

Author: BreakZero

core/domain/src/main/kotlin/org/easy/ai/domain/Chat.kt

@@ -71,9 +71,11 @@ class Chat internal constructor(
     }
 
     private fun List<ChatMessage>.takeUseful(): List<ChatMessage> {
-        return this.filter {
+        val filterHistory = this.filter {
             (it.participant in Participant.entries.toTypedArray())
         }
+        val size = filterHistory.size
+        return if (size > 16) filterHistory.takeLast(16) else filterHistory
     }
 
     fun sendMessageStream(prompt: String): Flow<ChatMessage> {

core/network/src/main/kotlin/org/easy/ai/network/gemini/GeminiRestApiController.kt

@@ -1,6 +1,5 @@
 package org.easy.ai.network.gemini
 
-import android.accounts.NetworkErrorException
 import io.ktor.client.HttpClient
 import io.ktor.client.call.body
 import io.ktor.client.request.HttpRequestBuilder