Hook in QR Scans in new media send flow.

app/src/main/java/org/thoughtcrime/securesms/mediasend/v3/MediaSendV3Activity.kt

@@ -13,14 +13,22 @@ import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.viewinterop.AndroidView
 import androidx.fragment.compose.AndroidFragment
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import org.signal.mediasend.HudCommand
 import org.signal.mediasend.MediaSendActivityContract
 import org.signal.mediasend.MediaSendScreen
 import org.signal.mediasend.edit.LocalAddAMessageRowTextField
 import org.thoughtcrime.securesms.PassphraseRequiredActivity
 import org.thoughtcrime.securesms.components.emoji.EmojiTextView
+import org.thoughtcrime.securesms.components.settings.app.AppSettingsActivity
 import org.thoughtcrime.securesms.mediasend.v2.review.AddMessageDialogFragment
+import org.thoughtcrime.securesms.recipients.Recipient
 import org.thoughtcrime.securesms.recipients.RecipientId
+import org.thoughtcrime.securesms.registration.olddevice.QuickTransferOldDeviceActivity
+import org.thoughtcrime.securesms.util.CommunicationActions
 
 /**
  * Encapsulates the media send flow for v3.
@@ -64,8 +72,28 @@ class MediaSendV3Activity : PassphraseRequiredActivity() {
                 )
               }
 
-              // TODO - QR HudCommands (GoToConversation, GoToLinkedDevices, GoToQuickTransfer) not yet wired up.
-              else -> Unit
+              is HudCommand.GoToConversation -> {
+                lifecycleScope.launch(Dispatchers.Default) {
+                  val recipient = Recipient.resolved(RecipientId.from(it.recipientId.id))
+                  withContext(Dispatchers.Main) {
+                    CommunicationActions.startConversation(
+                      this@MediaSendV3Activity,
+                      recipient,
+                      null
+                    )
+                  }
+                }
+              }
+
+              HudCommand.GoToLinkedDevices -> {
+                startActivity(AppSettingsActivity.linkedDevices(this))
+                finish()
+              }
+
+              is HudCommand.GoToQuickTransfer -> {
+                startActivity(QuickTransferOldDeviceActivity.intent(this, it.qrData))
+                finish()
+              }
             }
           }
         )