fix(UpdateChecker): 修复版本检查并添加日志记录

添加UTF-8字符集处理以正确读取响应
引入日志记录以帮助调试版本检查问题
处理BOM字符并优化错误处理

Author: matsuzaka-yuki

app/src/main/java/me/bmax/apatch/util/UpdateChecker.kt

@@ -5,13 +5,16 @@ import android.content.Intent
 import android.net.Uri
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
+import android.util.Log
 import me.bmax.apatch.BuildConfig
 import java.io.BufferedReader
 import java.io.InputStreamReader
 import java.net.HttpURLConnection
 import java.net.URL
+import java.nio.charset.StandardCharsets
 
 object UpdateChecker {
+    private const val TAG = "UpdateChecker"
     // Placeholder URL for version file.
     // It is expected to return a plain text integer version code.
     private const val UPDATE_API_URL = "https://folk.mysqil.com/api/version.php"
@@ -31,18 +34,25 @@ object UpdateChecker {
                 connection.readTimeout = 5000
 
                 if (connection.responseCode == HttpURLConnection.HTTP_OK) {
-                    val reader = BufferedReader(InputStreamReader(connection.inputStream))
-                    val remoteVersionCodeStr = reader.readText().trim()
+                    val reader = BufferedReader(InputStreamReader(connection.inputStream, StandardCharsets.UTF_8))
+                    val rawResponse = reader.readText()
                     reader.close()
 
+                    // Handle BOM and trim
+                    val remoteVersionCodeStr = rawResponse.replace("\uFEFF", "").trim()
+                    Log.d(TAG, "Raw response: '$rawResponse', Parsed string: '$remoteVersionCodeStr'")
+
                     val remoteVersionCode = remoteVersionCodeStr.toIntOrNull()
                     if (remoteVersionCode != null) {
+                        Log.d(TAG, "Remote: $remoteVersionCode, Local: ${BuildConfig.VERSION_CODE}")
                         return@withContext remoteVersionCode > BuildConfig.VERSION_CODE
+                    } else {
+                        Log.e(TAG, "Failed to parse version code")
                     }
                 }
                 false
             } catch (e: Exception) {
-                e.printStackTrace()
+                Log.e(TAG, "Check update failed", e)
                 false
             }
         }