Фикс: расшифровка групповых фото — fallback на hex group key (Desktop v1.2.1 parity)

Desktop теперь шифрует аттачменты в группах hex-версией ключа.
Android пробует raw key, при неудаче — hex key. Фикс в 3 местах:
processDownloadedImage, downloadAndDecryptImage, loadBitmapForViewerImage.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/java/com/rosetta/messenger/MainActivity.kt

@@ -141,6 +141,7 @@ class MainActivity : FragmentActivity() {
         // 🔥 Инициализируем ProtocolManager для обработки онлайн статусов
         ProtocolManager.initialize(this)
         CallManager.initialize(this)
+        com.rosetta.messenger.ui.chats.components.AttachmentDownloadDebugLogger.init(this)
 
         // 🔔 Инициализируем Firebase для push-уведомлений
         initializeFirebase()

app/src/main/java/com/rosetta/messenger/ui/chats/components/AttachmentComponents.kt

@@ -2851,7 +2851,14 @@ private suspend fun processDownloadedImage(
     var decryptDebug = MessageCrypto.AttachmentDecryptDebugResult(null, emptyList())
     val decrypted =
             if (groupPassword != null) {
-                val plain = CryptoManager.decryptWithPassword(encryptedContent, groupPassword!!)
+                // Try raw group key first, then hex-encoded (Desktop v1.2.1+ sends hex-encrypted attachments)
+                var plain = CryptoManager.decryptWithPassword(encryptedContent, groupPassword!!)
+                if (plain == null) {
+                    val hexKey = groupPassword!!.toByteArray(Charsets.ISO_8859_1)
+                        .joinToString("") { "%02x".format(it.toInt() and 0xff) }
+                    logPhotoDebug("Group raw key failed, trying hex key: id=$idShort, hexKeyLen=${hexKey.length}")
+                    plain = CryptoManager.decryptWithPassword(encryptedContent, hexKey)
+                }
                 decryptDebug = MessageCrypto.AttachmentDecryptDebugResult(plain, emptyList())
                 plain
             } else {
@@ -2968,6 +2975,11 @@ internal suspend fun downloadAndDecryptImage(
                     } else if (isGroupStoredKey(chachaKey)) {
                         val groupPassword = decodeGroupPassword(chachaKey, privateKey) ?: return@withContext null
                         CryptoManager.decryptWithPassword(encryptedContent, groupPassword)
+                            ?: run {
+                                val hexKey = groupPassword.toByteArray(Charsets.ISO_8859_1)
+                                    .joinToString("") { "%02x".format(it.toInt() and 0xff) }
+                                CryptoManager.decryptWithPassword(encryptedContent, hexKey)
+                            }
                     } else {
                         val keyCandidates = MessageCrypto.decryptKeyFromSenderCandidates(chachaKey, privateKey)
                         if (keyCandidates.isEmpty()) return@withContext null

app/src/main/java/com/rosetta/messenger/ui/chats/components/AttachmentDownloadDebugLogger.kt

@@ -8,9 +8,22 @@ object AttachmentDownloadDebugLogger {
     private val _logs = MutableStateFlow<List<String>>(emptyList())
     val logs: StateFlow<List<String>> = _logs.asStateFlow()
 
-    fun log(@Suppress("UNUSED_PARAMETER") message: String) {
+    private var appContext: android.content.Context? = null
-        // Disabled by request: no runtime accumulation of photo debug logs.
+
-        return
+    fun init(context: android.content.Context) {
+        appContext = context.applicationContext
+    }
+
+    fun log(message: String) {
+        val ctx = appContext ?: return
+        try {
+            val ts = java.text.SimpleDateFormat("HH:mm:ss.SSS", java.util.Locale.getDefault()).format(java.util.Date())
+            val line = "$ts [PhotoDL] $message"
+            android.util.Log.d("PhotoDL", message)
+            val dir = java.io.File(ctx.filesDir, "crash_reports")
+            if (!dir.exists()) dir.mkdirs()
+            java.io.File(dir, "image_logs.txt").appendText("$line\n")
+        } catch (_: Exception) {}
     }
 
     fun clear() {

app/src/main/java/com/rosetta/messenger/ui/chats/components/ImageViewerScreen.kt

@@ -984,7 +984,7 @@ private fun viewerLog(context: Context, msg: String) {
         val ts = java.text.SimpleDateFormat("HH:mm:ss.SSS", java.util.Locale.getDefault()).format(java.util.Date())
         val dir = java.io.File(context.filesDir, "crash_reports")
         if (!dir.exists()) dir.mkdirs()
-        java.io.File(dir, "rosettadev1.txt").appendText("$ts [Viewer] $msg\n")
+        java.io.File(dir, "image_logs.txt").appendText("$ts [Viewer] $msg\n")
     } catch (_: Exception) {}
 }
 
@@ -1062,7 +1062,14 @@ private suspend fun loadBitmapForViewerImage(
                 val groupPassword = CryptoManager.decryptWithPassword(
                     image.chachaKey.removePrefix("group:"), privateKey
                 )
-                if (groupPassword != null) CryptoManager.decryptWithPassword(encryptedContent, groupPassword) else null
+                if (groupPassword != null) {
+                    CryptoManager.decryptWithPassword(encryptedContent, groupPassword)
+                        ?: run {
+                            val hexKey = groupPassword.toByteArray(Charsets.ISO_8859_1)
+                                .joinToString("") { "%02x".format(it.toInt() and 0xff) }
+                            CryptoManager.decryptWithPassword(encryptedContent, hexKey)
+                        }
+                } else null
             } else if (image.chachaKey.isNotEmpty()) {
                 val decryptedKeyAndNonce = MessageCrypto.decryptKeyFromSender(image.chachaKey, privateKey)
                 MessageCrypto.decryptAttachmentBlobWithPlainKey(encryptedContent, decryptedKeyAndNonce)