diff --git a/app/src/main/java/com/stand/standapp/LoginActivity.kt b/app/src/main/java/com/stand/standapp/LoginActivity.kt
index 8c5d750..3b8a93c 100644
--- a/app/src/main/java/com/stand/standapp/LoginActivity.kt
+++ b/app/src/main/java/com/stand/standapp/LoginActivity.kt
@@ -9,6 +9,7 @@ import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import com.hjq.permissions.Permission
 import com.hjq.permissions.XXPermissions
+import com.stand.standapp.net.NetworkModule
 import com.stand.standapp.printer.PrinterManager
 import okhttp3.*
 import org.json.JSONObject
@@ -17,7 +18,7 @@ import java.io.IOException
 
 class LoginActivity : AppCompatActivity() {
 
-    private val client = OkHttpClient()
+    private val client = NetworkModule.defaultClient
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
diff --git a/app/src/main/java/com/stand/standapp/UpdateManager.kt b/app/src/main/java/com/stand/standapp/UpdateManager.kt
index 9c6b418..96191e7 100644
--- a/app/src/main/java/com/stand/standapp/UpdateManager.kt
+++ b/app/src/main/java/com/stand/standapp/UpdateManager.kt
@@ -15,6 +15,7 @@ import android.widget.Toast
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.FileProvider
+import com.stand.standapp.net.NetworkModule
 import okhttp3.*
 import org.json.JSONObject
 import java.io.File
@@ -58,7 +59,7 @@ class UpdateManager(private val context: Context) {
 
         val url = "$serverUrl/api/app-version/check-update?versionCode=$currentVersionCode"
 
-        val client = OkHttpClient()
+        val client = NetworkModule.defaultClient
         val request = Request.Builder().url(url).build()
 
         client.newCall(request).enqueue(object : Callback {
@@ -139,7 +140,7 @@ class UpdateManager(private val context: Context) {
     private fun startManualDownload(url: String) {
         showProgressDialog()
         
-        val client = OkHttpClient()
+        val client = NetworkModule.defaultClient
         val request = Request.Builder()
             .url(url)
             .addHeader("User-Agent", "Mozilla/5.0 (Android)")
diff --git a/app/src/main/java/com/stand/standapp/net/NetworkModule.kt b/app/src/main/java/com/stand/standapp/net/NetworkModule.kt
new file mode 100644
index 0000000..b197b62
--- /dev/null
+++ b/app/src/main/java/com/stand/standapp/net/NetworkModule.kt
@@ -0,0 +1,25 @@
+package com.stand.standapp.net
+
+import okhttp3.OkHttpClient
+import java.util.concurrent.TimeUnit
+
+object NetworkModule {
+    private const val DEFAULT_CONNECT_TIMEOUT_SEC = 15L
+    private const val DEFAULT_READ_TIMEOUT_SEC = 30L
+    private const val DEFAULT_WRITE_TIMEOUT_SEC = 30L
+
+    val defaultClient: OkHttpClient by lazy {
+        OkHttpClient.Builder()
+            .connectTimeout(DEFAULT_CONNECT_TIMEOUT_SEC, TimeUnit.SECONDS)
+            .readTimeout(DEFAULT_READ_TIMEOUT_SEC, TimeUnit.SECONDS)
+            .writeTimeout(DEFAULT_WRITE_TIMEOUT_SEC, TimeUnit.SECONDS)
+            .retryOnConnectionFailure(true)
+            .build()
+    }
+
+    fun streamingClient(): OkHttpClient {
+        return defaultClient.newBuilder()
+            .readTimeout(0, TimeUnit.MILLISECONDS)
+            .build()
+    }
+}
diff --git a/app/src/main/java/com/stand/standapp/ui/chat/repo/AiChatRepository.kt b/app/src/main/java/com/stand/standapp/ui/chat/repo/AiChatRepository.kt
index b72fd2e..223dcb8 100644
--- a/app/src/main/java/com/stand/standapp/ui/chat/repo/AiChatRepository.kt
+++ b/app/src/main/java/com/stand/standapp/ui/chat/repo/AiChatRepository.kt
@@ -2,6 +2,7 @@ package com.stand.standapp.ui.chat.repo
 
 import com.stand.standapp.AppConfig
 import android.content.Context
+import com.stand.standapp.net.NetworkModule
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.channels.awaitClose
@@ -15,12 +16,9 @@ import okhttp3.RequestBody.Companion.toRequestBody
 import timber.log.Timber
 import java.io.BufferedReader
 import java.io.InputStreamReader
-import java.util.concurrent.TimeUnit
 
 class AiChatRepository {
-    private val client = OkHttpClient.Builder()
-        .readTimeout(0, TimeUnit.MILLISECONDS) // 禁用读取超时以适配 SSE 流
-        .build()
+    private val client: OkHttpClient = NetworkModule.streamingClient()
 
     fun streamChat(context: Context, message: String, token: String, historyJson: String): Flow<String> = callbackFlow {
         // 1. 从 AppConfig 中动态读取当前服务器基准地址，完美适配真实网关
diff --git a/app/src/main/java/com/stand/standapp/utils/LogManager.kt b/app/src/main/java/com/stand/standapp/utils/LogManager.kt
index 355f6b7..450092e 100644
--- a/app/src/main/java/com/stand/standapp/utils/LogManager.kt
+++ b/app/src/main/java/com/stand/standapp/utils/LogManager.kt
@@ -2,6 +2,7 @@ package com.stand.standapp.utils
 
 import android.content.Context
 import com.stand.standapp.AppConfig
+import com.stand.standapp.net.NetworkModule
 import okhttp3.*
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.RequestBody.Companion.asRequestBody
@@ -17,7 +18,7 @@ import kotlin.system.exitProcess
 object LogManager {
     private val executor = Executors.newSingleThreadExecutor()
     private const val MAX_DAYS = 15
-    private val client = OkHttpClient()
+    private val client = NetworkModule.defaultClient
     private var logDir: File? = null
 
     fun init(context: Context) {