feat(chat): handle the E2EE contract additions and bump the contract packages

apps/flipcash/core/src/main/res/values/strings.xml

@@ -974,6 +974,7 @@
     <string name="label_edited">Edited</string>
     <string name="label_messageDeletedByYou">You deleted this message</string>
     <string name="label_messageDeleted">This message was deleted</string>
+    <string name="label_messageUnsupported">This message isn\'t supported on this version</string>
 
     <!-- Cash link card: the state of the link a message carries, read without claiming it -->
     <string name="label_linkCard_cash">Cash</string>

apps/flipcash/shared/chat-ui/src/main/kotlin/com/flipcash/shared/chat/models/ChatListItem.kt

@@ -164,6 +164,7 @@ sealed interface ChatListItem {
                 is MessageContent.Media -> "media"
                 is MessageContent.Reply -> "reply-message"
                 is MessageContent.System -> "system-message"
+                is MessageContent.Encrypted -> "encrypted-message"
             }
         }
     }

apps/flipcash/shared/chat-ui/src/main/kotlin/com/flipcash/shared/chat/ui/ChatSummaryMapping.kt

@@ -147,6 +147,7 @@ private fun MessageContent.previewText(
     // reaches here when every message in the chat is deleted — and then there is nothing
     // to preview.
     is MessageContent.Deleted -> null
+    is MessageContent.Encrypted -> null
 
     // TODO:
     is MessageContent.Media -> null

apps/flipcash/shared/chat-ui/src/main/kotlin/com/flipcash/shared/chat/ui/LinkDetection.kt

@@ -83,5 +83,6 @@ fun MessageContent.linkableText(): String? = when (this) {
     is MessageContent.Deleted,
     is MessageContent.Media,
     is MessageContent.System,
+    is MessageContent.Encrypted,
     -> null
 }

apps/flipcash/shared/chat-ui/src/main/kotlin/com/flipcash/shared/chat/ui/MessageBubble.kt

@@ -112,6 +112,7 @@ fun ContentBubble(
             is MessageContent.Media -> maxWidth * CASH_BUBBLE_MAX_WIDTH_FRACTION
             is MessageContent.Reply -> maxWidth * BUBBLE_MAX_WIDTH_FRACTION
             is MessageContent.System -> maxWidth
+            is MessageContent.Encrypted -> maxWidth * BUBBLE_MAX_WIDTH_FRACTION
         }
 
         // A split message's citation goes on its first row and its marker on its last, so the
@@ -218,6 +219,18 @@ fun ContentBubble(
                     attention = attention,
                 )
 
+                // Not decoded client-side -- see MessageContent.Encrypted. Rendered as a
+                // tombstone-style text bubble, the same treatment as a deleted message.
+                is MessageContent.Encrypted -> TextBubble(
+                    modifier = modifier,
+                    text = stringResource(R.string.label_messageUnsupported),
+                    isFromSelf = item.isFromSelf,
+                    position = position,
+                    maxWidth = bubbleMaxWidth,
+                    isTombstone = true,
+                    attention = attention,
+                )
+
                 // TODO
                 is MessageContent.Media -> Unit
                 is MessageContent.System -> Unit