Media transfers (#440)

* tor voice wip

* worky BLE a bit

* can send sound

* remove tor

* ui cleanup

* recording time

* progress bar color

* nicknames for audio

* onboarding permissions no microphone

* may work

* fix destionation

* extend

* refactor voice input component

* fix keyboard collapse issue

* send images

* wip image open

* image sending works

* wip waveforms

* better

* better animation

* fix cursor for sending audio

* image sending animation

* image sending animation

* full screen image viewer

* gossip sync for fragments too

* reduce delays

* fix keyboard focus

* use v2 for file transfers

* do not sync fragments

* scrollable image viewer

* ui

* ui adjustments

* nicer animation

* seek through audio

* add spec

* add more details to documentation

* File sharing E2E:
- Add TLV BitchatFilePacket, FileSharingManager
- Implement sendFileNote in ChatViewModel
- File receive path: save to files/incoming and render [file] messages with FileMessageItem or FileSendingAnimation during transfer
- SAF FilePickerButton and dispatcher wiring; image/file choice to follow in MediaPickerOptions
- Add FileViewerDialog with system open/save, FileProvider and file_paths
- Hook transfer progress to file sending UI
- Manifest: READ_MEDIA_* and FileProvider
- Fix MessageHandler saving and prefix for non-image payloads
- Add helper utils (FileUtils)

* kinda wip

* fix buttons

* files half working

* wip file transfer

* file packet has 2-byte TLV and chunks. it wokrs but it sucks

* clean

* remove gossip sync for fragments

* fix audio and image rendering

* adjust FILE_SIZE TLV size too

* cleanup

* haptic

* private messages media

* read receipts for media

* use enum for message type not string

* delivery ack checks dont push content

* check

* animation fix

* refactor

* ui adjustments

* comments

* refactor

* fix crash on send and receive of the same file

* refactor notifications

* tests

app/src/main/java/com/bitchat/android/nostr/NostrDirectMessageHandler.kt

@@ -160,6 +160,31 @@ class NostrDirectMessageHandler(
                     meshDelegateHandler.didReceiveReadReceipt(messageId, convKey)
                 }
             }
+            com.bitchat.android.model.NoisePayloadType.FILE_TRANSFER -> {
+                // Properly handle encrypted file transfer
+                val file = com.bitchat.android.model.BitchatFilePacket.decode(payload.data)
+                if (file != null) {
+                    val uniqueMsgId = java.util.UUID.randomUUID().toString().uppercase()
+                    val savedPath = com.bitchat.android.features.file.FileUtils.saveIncomingFile(application, file)
+                    val message = BitchatMessage(
+                        id = uniqueMsgId,
+                        sender = senderNickname,
+                        content = savedPath,
+                        type = com.bitchat.android.features.file.FileUtils.messageTypeForMime(file.mimeType),
+                        timestamp = timestamp,
+                        isRelay = false,
+                        isPrivate = true,
+                        recipientNickname = state.getNicknameValue(),
+                        senderPeerID = convKey
+                    )
+                    Log.d(TAG, "📄 Saved Nostr encrypted incoming file to $savedPath (msgId=$uniqueMsgId)")
+                    withContext(Dispatchers.Main) {
+                        privateChatManager.handleIncomingPrivateMessage(message, suppressUnread = false)
+                    }
+                } else {
+                    Log.w(TAG, "⚠️ Failed to decode Nostr file transfer from $convKey")
+                }
+            }
         }
     }
 

app/src/main/java/com/bitchat/android/nostr/NostrTransport.kt

@@ -240,11 +240,7 @@ class NostrTransport(
                     return@launch
                 }
                 
-                val content = if (isFavorite) {
-                    "[FAVORITED]:${senderIdentity.npub}"
-                } else {
-                    "[UNFAVORITED]:${senderIdentity.npub}"
-                }
+                val content = if (isFavorite) "[FAVORITED]:${senderIdentity.npub}" else "[UNFAVORITED]:${senderIdentity.npub}"
                 
                 Log.d(TAG, "NostrTransport: preparing FAVORITE($isFavorite) to ${recipientNostrPubkey.take(16)}...")