android, desktop: sharing channel links (#6828)

* android, desktop: sharing channel links - types, api, strings

* implementation

* fix build

* improve layout

* improve card layouts

* better divider

* preview image

* icon, preview

* better icons

* bigger icon

* darker icons

* better icon colors

* better layouts

* compose preview for chat links

* sizes

* fix editing

---------

Co-authored-by: Evgeny @ SimpleX Chat <259188159+evgeny-simplex@users.noreply.github.com>

apps/ios/Shared/Views/Chat/ChatItem/CIChatLinkHeader.swift

@@ -18,6 +18,7 @@ struct CIChatLinkHeader: View {
                 .padding(.top, 8)
                 .padding(.bottom, 6)
                 .overlay(DetermineWidth())
+            Divider()
             VStack(alignment: .leading, spacing: 2) {
                 if let descr = chatLink.shortDescription {
                     Text(descr)

apps/ios/Shared/Views/Chat/ComposeMessage/ComposeChatLinkView.swift

@@ -34,10 +34,9 @@ struct ComposeChatLinkView: View {
                 }
             }
         }
-        .padding(.vertical, 1)
+        .padding(.vertical, 8)
         .padding(.trailing, 12)
         .background(theme.appColors.sentMessage)
-        .frame(minHeight: 54)
         .frame(maxWidth: .infinity)
     }
 }

apps/ios/Shared/Views/Chat/ComposeMessage/ComposeView.swift

@@ -74,7 +74,11 @@ struct ComposeState {
     }
 
     init(editingItem: ChatItem) {
-        let text = editingItem.content.text
+        let text = if case let .chat(t, chatLink, _) = editingItem.content.msgContent {
+            stripTextLink(t, chatLink.connLinkStr)
+        } else {
+            editingItem.content.text
+        }
         self.message = text
         self.parsedMessage = editingItem.formattedText ?? FormattedText.plain(text)
         self.preview = chatItemPreview(chatItem: editingItem)
@@ -1577,9 +1581,9 @@ struct ComposeView: View {
                 return .file(msgText)
             case .report(_, let reason):
                 return .report(text: msgText, reason: reason)
-            // TODO [short links] update chat link
             case let .chat(_, chatLink, ownerSig):
-                return .chat(text: msgText, chatLink: chatLink, ownerSig: ownerSig)
+                let text = msgText.isEmpty ? chatLink.connLinkStr : msgText + "\n" + chatLink.connLinkStr
+                return .chat(text: text, chatLink: chatLink, ownerSig: ownerSig)
             case .unknown(let type, _):
                 return .unknown(type: type, text: msgText)
             }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/model/ChatModel.kt

@@ -2113,7 +2113,7 @@ data class GroupInfo (
 
   val chatIconName: ImageResource
     get() = if (useRelays) {
-      MR.images.ic_bigtop_updates_padded
+      MR.images.ic_bigtop_updates_circle_filled
     } else when (businessChat?.chatType) {
       null -> MR.images.ic_supervised_user_circle_filled
       BusinessChatType.Business -> MR.images.ic_work_filled_padded
@@ -4307,7 +4307,7 @@ sealed class MsgContent {
   @Serializable(with = MsgContentSerializer::class) class MCVoice(override val text: String, val duration: Int): MsgContent()
   @Serializable(with = MsgContentSerializer::class) class MCFile(override val text: String): MsgContent()
   @Serializable(with = MsgContentSerializer::class) class MCReport(override val text: String, val reason: ReportReason): MsgContent()
-  @Serializable(with = MsgContentSerializer::class) class MCChat(override val text: String, val chatLink: MsgChatLink): MsgContent()
+  @Serializable(with = MsgContentSerializer::class) class MCChat(override val text: String, val chatLink: MsgChatLink, val ownerSig: LinkOwnerSig? = null): MsgContent()
   @Serializable(with = MsgContentSerializer::class) class MCUnknown(val type: String? = null, override val text: String, val json: JsonElement): MsgContent()
 
   val isVoice: Boolean get() =
@@ -4428,7 +4428,8 @@ object MsgContentSerializer : KSerializer<MsgContent> {
           }
           "chat" -> {
             val chatLink = decoder.json.decodeFromString<MsgChatLink>(json["chatLink"].toString())
-            MsgContent.MCChat(text, chatLink)
+            val ownerSig = json["ownerSig"]?.let { decoder.json.decodeFromJsonElement<LinkOwnerSig>(it) }
+            MsgContent.MCChat(text, chatLink, ownerSig)
           }
           else -> MsgContent.MCUnknown(t, text, json)
         }
@@ -4489,6 +4490,7 @@ object MsgContentSerializer : KSerializer<MsgContent> {
           put("type", "chat")
           put("text", value.text)
           put("chatLink", json.encodeToJsonElement(value.chatLink))
+          value.ownerSig?.let { put("ownerSig", json.encodeToJsonElement(it)) }
         }
       is MsgContent.MCUnknown -> value.json
     }
@@ -4548,8 +4550,91 @@ sealed class MsgChatLink {
   @Serializable @SerialName("contact") data class Contact(val connLink: String, val profile: Profile, val business: Boolean) : MsgChatLink()
   @Serializable @SerialName("invitation") data class Invitation(val invLink: String, val profile: Profile) : MsgChatLink()
   @Serializable @SerialName("group") data class Group(val connLink: String, val groupProfile: GroupProfile) : MsgChatLink()
+
+  val isPublicGroup: Boolean
+    get() = (this as? Group)?.groupProfile?.publicGroup != null
+
+  val connLinkStr: String
+    get() = when (this) {
+      is Group -> connLink
+      is Contact -> connLink
+      is Invitation -> invLink
+    }
+
+  val image: String?
+    get() = when (this) {
+      is Group -> groupProfile.image
+      is Contact -> profile.image
+      is Invitation -> profile.image
+    }
+
+  val displayName: String
+    get() = when (this) {
+      is Group -> groupProfile.displayName
+      is Contact -> profile.displayName
+      is Invitation -> profile.displayName
+    }
+
+  val fullName: String
+    get() = when (this) {
+      is Group -> groupProfile.fullName
+      is Contact -> profile.fullName
+      is Invitation -> profile.fullName
+    }
+
+  val shortDescription: String?
+    get() {
+      val s = when (this) {
+        is Group -> groupProfile.shortDescr
+        is Contact -> profile.shortDescr
+        is Invitation -> profile.shortDescr
+      }
+      return s?.trim()?.ifEmpty { null }
+    }
+
+  val iconRes: ImageResource
+    get() = when (this) {
+      is Group -> when (groupProfile.publicGroup?.groupType) {
+        GroupType.Channel -> MR.images.ic_bigtop_updates_circle_filled
+        else -> MR.images.ic_supervised_user_circle_filled
+      }
+      is Contact -> if (business) MR.images.ic_work_filled_padded else MR.images.ic_account_circle_filled
+      is Invitation -> MR.images.ic_account_circle_filled
+    }
+
+  val smallIconRes: ImageResource
+    get() = when (this) {
+      is Group -> when (groupProfile.publicGroup?.groupType) {
+        GroupType.Channel -> MR.images.ic_bigtop_updates
+        else -> MR.images.ic_group
+      }
+      is Contact -> if (business) MR.images.ic_work else MR.images.ic_person
+      is Invitation -> MR.images.ic_person
+    }
+
+  fun infoLine(signed: Boolean): String {
+    var s = when (this) {
+      is Group -> when (groupProfile.publicGroup?.groupType) {
+        GroupType.Channel -> generalGetString(MR.strings.chat_link_channel)
+        else -> generalGetString(MR.strings.chat_link_group)
+      }
+      is Contact -> if (business) generalGetString(MR.strings.chat_link_business_address) else generalGetString(MR.strings.chat_link_contact_address)
+      is Invitation -> generalGetString(MR.strings.chat_link_one_time)
+    }
+    if (signed) {
+      s += " " + if (isPublicGroup) generalGetString(MR.strings.chat_link_from_owner) else generalGetString(MR.strings.chat_link_signed)
+    }
+    return s
+  }
 }
 
+@Serializable
+data class LinkOwnerSig(
+  val ownerId: String? = null,
+  val chatBinding: String,
+  val ownerSig: String
+)
+
 @Serializable
 class FormattedText(val text: String, val format: Format? = null) {
   val linkUri: String? get() =

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/model/SimpleXAPI.kt

@@ -1135,6 +1135,13 @@ object ChatController {
     return processSendMessageCmd(rh, cmd)?.map { it.chatItem }
   }
 
+  suspend fun apiShareChatMsgContent(rh: Long?, shareChatType: ChatType, shareChatId: Long, toChatType: ChatType, toChatId: Long, toScope: GroupChatScope?, sendAsGroup: Boolean): MsgContent? {
+    val r = sendCmd(rh, CC.ApiShareChatMsgContent(shareChatType, shareChatId, toChatType, toChatId, toScope, sendAsGroup))
+    if (r is API.Result && r.res is CR.ChatMsgContent) return r.res.msgContent
+    apiErrorAlert("apiShareChatMsgContent", generalGetString(MR.strings.error_sharing_channel), r)
+    return null
+  }
+
   suspend fun apiPlanForwardChatItems(rh: Long?, fromChatType: ChatType, fromChatId: Long, fromScope: GroupChatScope?, chatItemIds: List<Long>): CR.ForwardPlan? {
     val r = sendCmd(rh, CC.ApiPlanForwardChatItems(fromChatType, fromChatId, fromScope, chatItemIds))
     if (r is API.Result && r.res is CR.ForwardPlan) return r.res
@@ -1485,9 +1492,9 @@ object ChatController {
     return null
   }
 
-  suspend fun apiConnectPlan(rh: Long?, connLink: String, inProgress: MutableState<Boolean>): Pair<CreatedConnLink, ConnectionPlan>? {
+  suspend fun apiConnectPlan(rh: Long?, connLink: String, linkOwnerSig: LinkOwnerSig? = null, inProgress: MutableState<Boolean>): Pair<CreatedConnLink, ConnectionPlan>? {
     val userId = kotlin.runCatching { currentUserId("apiConnectPlan") }.getOrElse { return null }
-    val r = sendCmdWithRetry(rh, CC.APIConnectPlan(userId, connLink), inProgress = inProgress)
+    val r = sendCmdWithRetry(rh, CC.APIConnectPlan(userId, connLink, linkOwnerSig), inProgress = inProgress)
     if (r is API.Result && r.res is CR.CRConnectionPlan) return r.res.connLink to r.res.connectionPlan
     if (inProgress.value && r != null) apiConnectResponseAlert(r)
     return null
@@ -3624,6 +3631,7 @@ sealed class CC {
   class ApiGetReactionMembers(val userId: Long, val groupId: Long, val itemId: Long, val reaction: MsgReaction): CC()
   class ApiPlanForwardChatItems(val fromChatType: ChatType, val fromChatId: Long, val fromScope: GroupChatScope?, val chatItemIds: List<Long>): CC()
   class ApiForwardChatItems(val toChatType: ChatType, val toChatId: Long, val toScope: GroupChatScope?, val sendAsGroup: Boolean, val fromChatType: ChatType, val fromChatId: Long, val fromScope: GroupChatScope?, val itemIds: List<Long>, val ttl: Int?): CC()
+  class ApiShareChatMsgContent(val shareChatType: ChatType, val shareChatId: Long, val toChatType: ChatType, val toChatId: Long, val toScope: GroupChatScope?, val sendAsGroup: Boolean): CC()
   class ApiNewGroup(val userId: Long, val incognito: Boolean, val groupProfile: GroupProfile): CC()
   class ApiNewPublicGroup(val userId: Long, val incognito: Boolean, val relayIds: List<Long>, val groupProfile: GroupProfile): CC()
   class ApiGetGroupRelays(val groupId: Long): CC()
@@ -3683,7 +3691,7 @@ sealed class CC {
   class APIAddContact(val userId: Long, val incognito: Boolean): CC()
   class ApiSetConnectionIncognito(val connId: Long, val incognito: Boolean): CC()
   class ApiChangeConnectionUser(val connId: Long, val userId: Long): CC()
-  class APIConnectPlan(val userId: Long, val connLink: String): CC()
+  class APIConnectPlan(val userId: Long, val connLink: String, val linkOwnerSig: LinkOwnerSig? = null): CC()
   class APIPrepareContact(val userId: Long, val connLink: CreatedConnLink, val contactShortLinkData: ContactShortLinkData): CC()
   class APIPrepareGroup(val userId: Long, val connLink: CreatedConnLink, val directLink: Boolean, val groupShortLinkData: GroupShortLinkData): CC()
   class APIChangePreparedContactUser(val contactId: Long, val newUserId: Long): CC()
@@ -3822,6 +3830,9 @@ sealed class CC {
       val ttlStr = if (ttl != null) "$ttl" else "default"
       "/_forward ${chatRef(toChatType, toChatId, toScope)}${if (sendAsGroup) " as_group=on" else ""} ${chatRef(fromChatType, fromChatId, fromScope)} ${itemIds.joinToString(",")} ttl=${ttlStr}"
     }
+    is ApiShareChatMsgContent -> {
+      "/_share chat content ${chatRef(shareChatType, shareChatId, null)} ${chatRef(toChatType, toChatId, toScope)}${if (sendAsGroup) "(as_group=on)" else ""}"
+    }
     is ApiPlanForwardChatItems -> {
       "/_forward plan ${chatRef(fromChatType, fromChatId, fromScope)} ${chatItemIds.joinToString(",")}"
     }
@@ -3884,7 +3895,10 @@ sealed class CC {
     is APIAddContact -> "/_connect $userId incognito=${onOff(incognito)}"
     is ApiSetConnectionIncognito -> "/_set incognito :$connId ${onOff(incognito)}"
     is ApiChangeConnectionUser -> "/_set conn user :$connId $userId"
-    is APIConnectPlan -> "/_connect plan $userId $connLink"
+    is APIConnectPlan -> {
+      val sigStr = if (linkOwnerSig != null) " sig=${json.encodeToString(linkOwnerSig)}" else ""
+      "/_connect plan $userId $connLink$sigStr"
+    }
     is APIPrepareContact -> "/_prepare contact $userId ${connLink.connFullLink} ${connLink.connShortLink ?: ""} ${json.encodeToString(contactShortLinkData)}"
     is APIPrepareGroup -> "/_prepare group $userId ${connLink.connFullLink} ${connLink.connShortLink ?: ""} direct=${onOff(directLink)} ${json.encodeToString(groupShortLinkData)}"
     is APIChangePreparedContactUser -> "/_set contact user @$contactId $newUserId"
@@ -4003,6 +4017,7 @@ sealed class CC {
     is ApiChatItemReaction -> "apiChatItemReaction"
     is ApiGetReactionMembers -> "apiGetReactionMembers"
     is ApiForwardChatItems -> "apiForwardChatItems"
+    is ApiShareChatMsgContent -> "apiShareChatMsgContent"
     is ApiPlanForwardChatItems -> "apiPlanForwardChatItems"
     is ApiNewGroup -> "apiNewGroup"
     is ApiNewPublicGroup -> "apiNewPublicGroup"
@@ -6318,6 +6333,7 @@ sealed class CR {
   @Serializable @SerialName("subscriptionStatus") class SubscriptionStatusEvt(val subscriptionStatus: SubscriptionStatus, val connections: List<String>): CR()
   @Serializable @SerialName("chatInfoUpdated") class ChatInfoUpdated(val user: UserRef, val chatInfo: ChatInfo): CR()
   @Serializable @SerialName("newChatItems") class NewChatItems(val user: UserRef, val chatItems: List<AChatItem>): CR()
+  @Serializable @SerialName("chatMsgContent") class ChatMsgContent(val user: UserRef, val msgContent: MsgContent): CR()
   @Serializable @SerialName("chatItemsStatusesUpdated") class ChatItemsStatusesUpdated(val user: UserRef, val chatItems: List<AChatItem>): CR()
   @Serializable @SerialName("chatItemUpdated") class ChatItemUpdated(val user: UserRef, val chatItem: AChatItem): CR()
   @Serializable @SerialName("chatItemNotChanged") class ChatItemNotChanged(val user: UserRef, val chatItem: AChatItem): CR()
@@ -6506,6 +6522,7 @@ sealed class CR {
     is SubscriptionStatusEvt -> "subscriptionStatus"
     is ChatInfoUpdated -> "chatInfoUpdated"
     is NewChatItems -> "newChatItems"
+    is ChatMsgContent -> "chatMsgContent"
     is ChatItemsStatusesUpdated -> "chatItemsStatusesUpdated"
     is ChatItemUpdated -> "chatItemUpdated"
     is ChatItemNotChanged -> "chatItemNotChanged"
@@ -6686,6 +6703,7 @@ sealed class CR {
     is SubscriptionStatusEvt -> "subscriptionStatus $subscriptionStatus\nconnections: $connections"
     is ChatInfoUpdated -> withUser(user, json.encodeToString(chatInfo))
     is NewChatItems -> withUser(user, chatItems.joinToString("\n") { json.encodeToString(it) })
+    is ChatMsgContent -> withUser(user, msgContent.toString())
     is ChatItemsStatusesUpdated -> withUser(user, chatItems.joinToString("\n") { json.encodeToString(it) })
     is ChatItemUpdated -> withUser(user, json.encodeToString(chatItem))
     is ChatItemNotChanged -> withUser(user, json.encodeToString(chatItem))
@@ -6840,6 +6858,12 @@ fun simplexChatLink(uri: String): String =
   if (uri.startsWith("simplex:/")) uri.replace("simplex:/", "https://simplex.chat/")
   else uri
 
+@Serializable
+sealed class OwnerVerification {
+  @Serializable @SerialName("verified") object Verified : OwnerVerification()
+  @Serializable @SerialName("failed") class Failed(val reason: String) : OwnerVerification()
+}
+
 @Serializable
 sealed class ConnectionPlan {
   @Serializable @SerialName("invitationLink") class InvitationLink(val invitationLinkPlan: InvitationLinkPlan): ConnectionPlan()
@@ -6850,7 +6874,7 @@ sealed class ConnectionPlan {
 
 @Serializable
 sealed class InvitationLinkPlan {
-  @Serializable @SerialName("ok") class Ok(val contactSLinkData_: ContactShortLinkData? = null): InvitationLinkPlan()
+  @Serializable @SerialName("ok") class Ok(val contactSLinkData_: ContactShortLinkData? = null, val ownerVerification: OwnerVerification? = null): InvitationLinkPlan()
   @Serializable @SerialName("ownLink") object OwnLink: InvitationLinkPlan()
   @Serializable @SerialName("connecting") class Connecting(val contact_: Contact? = null): InvitationLinkPlan()
   @Serializable @SerialName("known") class Known(val contact: Contact): InvitationLinkPlan()
@@ -6858,7 +6882,7 @@ sealed class InvitationLinkPlan {
 
 @Serializable
 sealed class ContactAddressPlan {
-  @Serializable @SerialName("ok") class Ok(val contactSLinkData_: ContactShortLinkData? = null): ContactAddressPlan()
+  @Serializable @SerialName("ok") class Ok(val contactSLinkData_: ContactShortLinkData? = null, val ownerVerification: OwnerVerification? = null): ContactAddressPlan()
   @Serializable @SerialName("ownLink") object OwnLink: ContactAddressPlan()
   @Serializable @SerialName("connectingConfirmReconnect") object ConnectingConfirmReconnect: ContactAddressPlan()
   @Serializable @SerialName("connectingProhibit") class ConnectingProhibit(val contact: Contact): ContactAddressPlan()
@@ -6868,7 +6892,7 @@ sealed class ContactAddressPlan {
 
 @Serializable
 sealed class GroupLinkPlan {
-  @Serializable @SerialName("ok") class Ok(val groupSLinkInfo_: GroupShortLinkInfo? = null, val groupSLinkData_: GroupShortLinkData? = null): GroupLinkPlan()
+  @Serializable @SerialName("ok") class Ok(val groupSLinkInfo_: GroupShortLinkInfo? = null, val groupSLinkData_: GroupShortLinkData? = null, val ownerVerification: OwnerVerification? = null): GroupLinkPlan()
   @Serializable @SerialName("ownLink") class OwnLink(val groupInfo: GroupInfo): GroupLinkPlan()
   @Serializable @SerialName("connectingConfirmReconnect") object ConnectingConfirmReconnect: GroupLinkPlan()
   @Serializable @SerialName("connectingProhibit") class ConnectingProhibit(val groupInfo_: GroupInfo? = null): GroupLinkPlan()

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/ui/theme/Color.kt

@@ -29,8 +29,8 @@ val GroupDark = Color(80, 80, 80, 60)
 val IncomingCallLight = Color(239, 237, 236, 255)
 val WarningOrange = Color(255, 127, 0, 255)
 val WarningYellow = Color(255, 192, 0, 255)
-val FileLight = Color(183, 190, 199, 255)
-val FileDark = Color(101, 101, 106, 255)
+val FileLight = Color(191, 194, 199, 255)
+val FileDark = Color(94, 94, 98, 255)
 
 val MenuTextColor: Color @Composable get () = if (isInDarkTheme()) LocalContentColor.current.copy(alpha = 0.8f) else Color.Black
 val NoteFolderIconColor: Color @Composable get() = MaterialTheme.appColors.primaryVariant2

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ChatView.kt

@@ -3204,7 +3204,7 @@ fun openGroupLink(groupInfo: GroupInfo, rhId: Long?, view: Any? = null, close: (
     val link = chatModel.controller.apiGetGroupLink(rhId, groupInfo.groupId)
     close?.invoke()
     ModalManager.end.showModalCloseable(true) {
-      GroupLinkView(chatModel, rhId, groupInfo, link, onGroupLinkUpdated = null, isChannel = groupInfo.useRelays)
+      GroupLinkView(chatModel, rhId, groupInfo, link, onGroupLinkUpdated = null, isChannel = groupInfo.useRelays, shareGroupInfo = groupInfo)
     }
   }
 }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ComposeChatLinkView.kt

@@ -0,0 +1,53 @@
+package chat.simplex.common.views.chat
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import chat.simplex.common.model.MsgChatLink
+import chat.simplex.common.ui.theme.appColors
+import chat.simplex.common.views.helpers.ProfileImage
+import dev.icerock.moko.resources.compose.painterResource
+import chat.simplex.res.MR
+
+@Composable
+fun ComposeChatLinkView(
+  chatLink: MsgChatLink,
+  cancelEnabled: Boolean,
+  cancelPreview: () -> Unit
+) {
+  val sentColor = MaterialTheme.appColors.sentMessage
+  Row(
+    Modifier
+      .fillMaxWidth()
+      .padding(top = 8.dp)
+      .background(sentColor)
+      .padding(start = 8.dp, top = 6.dp, bottom = 6.dp),
+    verticalAlignment = Alignment.CenterVertically
+  ) {
+    ProfileImage(size = 54.dp, image = chatLink.image, icon = chatLink.iconRes)
+    Column(
+      Modifier.fillMaxWidth().weight(1f).padding(horizontal = 8.dp)
+    ) {
+      Text(chatLink.displayName, maxLines = 1, overflow = TextOverflow.Ellipsis)
+      chatLink.shortDescription?.let { descr ->
+        Text(
+          descr,
+          maxLines = 1,
+          overflow = TextOverflow.Ellipsis,
+          style = MaterialTheme.typography.body2,
+          color = MaterialTheme.colors.secondary,
+        )
+      }
+    }
+    if (cancelEnabled) {
+      IconButton(onClick = cancelPreview) {
+        Icon(painterResource(MR.images.ic_close), null, tint = MaterialTheme.colors.primary)
+      }
+    }
+  }
+}

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ComposeView.kt

@@ -57,6 +57,7 @@ const val MAX_NUMBER_OF_MENTIONS = 3
 sealed class ComposePreview {
   @Serializable object NoPreview: ComposePreview()
   @Serializable class CLinkPreview(val linkPreview: LinkPreview?): ComposePreview()
+  @Serializable class ChatLinkPreview(val chatLink: MsgChatLink, val ownerSig: LinkOwnerSig? = null): ComposePreview()
   @Serializable class MediaPreview(val images: List<String>, val content: List<UploadContent>): ComposePreview()
   @Serializable data class VoicePreview(val voice: String, val durationMs: Int, val finished: Boolean): ComposePreview()
   @Serializable class FilePreview(val fileName: String, val uri: URI): ComposePreview()
@@ -112,7 +113,12 @@ data class ComposeState(
   val mentions: MentionedMembers = emptyMap()
 ) {
   constructor(editingItem: ChatItem, liveMessage: LiveMessage? = null, useLinkPreviews: Boolean): this(
-    ComposeMessage(editingItem.content.text),
+    ComposeMessage(
+      when (val mc = editingItem.content.msgContent) {
+        is MsgContent.MCChat -> stripTextLink(mc.text, mc.chatLink.connLinkStr)
+        else -> editingItem.content.text
+      }
+    ),
     editingItem.formattedText ?: FormattedText.plain(editingItem.content.text),
     liveMessage,
     chatItemPreview(editingItem),
@@ -163,6 +169,7 @@ data class ComposeState(
       val hasContent = when (preview) {
         is ComposePreview.MediaPreview -> true
         is ComposePreview.VoicePreview -> true
+        is ComposePreview.ChatLinkPreview -> true
         is ComposePreview.FilePreview -> true
         else -> !whitespaceOnly || forwarding || liveMessage != null || submittingValidReport
       }
@@ -174,6 +181,7 @@ data class ComposeState(
   val linkPreviewAllowed: Boolean
     get() =
       when (preview) {
+        is ComposePreview.ChatLinkPreview -> false
         is ComposePreview.MediaPreview -> false
         is ComposePreview.VoicePreview -> false
         is ComposePreview.FilePreview -> false
@@ -200,6 +208,7 @@ data class ComposeState(
     get() = when (preview) {
       ComposePreview.NoPreview -> false
       is ComposePreview.CLinkPreview -> false
+      is ComposePreview.ChatLinkPreview -> false
       is ComposePreview.MediaPreview -> preview.content.isNotEmpty()
       is ComposePreview.VoicePreview -> false
       is ComposePreview.FilePreview -> true
@@ -468,6 +477,7 @@ fun ComposeView(
         is SharedContent.File -> listOf(shared.uri.toString())
         is SharedContent.Text -> emptyList()
         is SharedContent.Forward -> emptyList()
+        is SharedContent.ChatLink -> emptyList()
       }
       // When sharing a file and pasting it in SimpleX itself, the file shouldn't be deleted before sending or before leaving the chat after sharing
       chatModel.filesToDelete.removeAll { file ->
@@ -672,8 +682,11 @@ fun ComposeView(
         is MsgContent.MCVoice -> MsgContent.MCVoice(msgText, duration = msgContent.duration)
         is MsgContent.MCFile -> MsgContent.MCFile(msgText)
         is MsgContent.MCReport -> MsgContent.MCReport(msgText, reason = msgContent.reason)
-        // TODO [short links] update chat link
-        is MsgContent.MCChat -> MsgContent.MCChat(msgText, chatLink = msgContent.chatLink)
+        is MsgContent.MCChat -> {
+          val linkStr = msgContent.chatLink.connLinkStr
+          val text = if (msgText.isEmpty()) linkStr else "$msgText\n$linkStr"
+          MsgContent.MCChat(text, chatLink = msgContent.chatLink, ownerSig = msgContent.ownerSig)
+        }
         is MsgContent.MCUnknown -> MsgContent.MCUnknown(type = msgContent.type, text = msgText, json = msgContent.json)
       }
     }
@@ -760,6 +773,11 @@ fun ComposeView(
       when (val preview = cs.preview) {
         ComposePreview.NoPreview -> msgs.add(MsgContent.MCText(msgText))
         is ComposePreview.CLinkPreview -> msgs.add(checkLinkPreview())
+        is ComposePreview.ChatLinkPreview -> {
+          val linkStr = preview.chatLink.connLinkStr
+          val text = if (msgText.isEmpty()) linkStr else "$msgText\n$linkStr"
+          msgs.add(MsgContent.MCChat(text, preview.chatLink, preview.ownerSig))
+        }
         is ComposePreview.MediaPreview -> {
           // TODO batch send: batch media previews
           preview.content.forEachIndexed { index, it ->
@@ -1060,6 +1078,11 @@ fun ComposeView(
         ::cancelLinkPreview,
         cancelEnabled = !composeState.value.inProgress
       )
+      is ComposePreview.ChatLinkPreview -> ComposeChatLinkView(
+        chatLink = preview.chatLink,
+        cancelEnabled = !composeState.value.inProgress,
+        cancelPreview = { composeState.value = composeState.value.copy(preview = ComposePreview.NoPreview) }
+      )
       is ComposePreview.MediaPreview -> ComposeImageView(
         preview,
         ::cancelImages,
@@ -1440,6 +1463,22 @@ fun ComposeView(
         contextItem = ComposeContextItem.ForwardingItems(shared.chatItems, shared.fromChatInfo),
         preview = if (composeState.value.preview is ComposePreview.CLinkPreview) composeState.value.preview else ComposePreview.NoPreview
       )
+      is SharedContent.ChatLink -> {
+        val cInfo = chat.chatInfo
+        val sendAsGroup = (cInfo as? ChatInfo.Group)?.groupInfo?.let { it.useRelays && it.membership.memberRole >= GroupMemberRole.Owner } ?: false
+        withBGApi {
+          val mc = chatModel.controller.apiShareChatMsgContent(
+            chat.remoteHostId, ChatType.Group, shared.groupInfo.groupId,
+            cInfo.chatType, cInfo.apiId,
+            cInfo.groupChatScope(), sendAsGroup
+          )
+          if (mc is MsgContent.MCChat) {
+            composeState.value = composeState.value.copy(
+              preview = ComposePreview.ChatLinkPreview(mc.chatLink, mc.ownerSig)
+            )
+          }
+        }
+      }
       null -> {}
     }
     chatModel.sharedContent.value = null

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ContextItemView.kt

@@ -39,7 +39,7 @@ fun ContextItemView(
   val receivedColor = MaterialTheme.appColors.receivedMessage
 
   @Composable
-  fun MessageText(contextItem: ChatItem, attachment: ImageResource?, lines: Int) {
+  fun MessageText(contextItem: ChatItem, attachment: ImageResource?, lines: Int, prefix: AnnotatedString? = null, stripLink: String? = null) {
     val inlineContent: Pair<AnnotatedString.Builder.() -> Unit, Map<String, InlineTextContent>>? = if (attachment != null) {
       remember(contextItem.id) {
         val inlineContentBuilder: AnnotatedString.Builder.() -> Unit = {
@@ -68,24 +68,35 @@ fun ContextItemView(
       userMemberId = when {
         chatInfo is ChatInfo.Group -> chatInfo.groupInfo.membership.memberId
         else -> null
-      }
+      },
+      prefix = prefix,
+      stripLink = stripLink,
     )
   }
 
   fun attachment(contextItem: ChatItem): ImageResource? {
     val fileIsLoaded = getLoadedFilePath(contextItem.file) != null
 
-    return when (contextItem.content.msgContent) {
+    val mc = contextItem.content.msgContent
+    return when (mc) {
       is MsgContent.MCFile -> if (fileIsLoaded) MR.images.ic_draft_filled else null
       is MsgContent.MCImage -> MR.images.ic_image
       is MsgContent.MCVoice ->  if (fileIsLoaded) MR.images.ic_play_arrow_filled else null
+      is MsgContent.MCChat -> mc.chatLink.smallIconRes
       else -> null
     }
   }
 
   @Composable
   fun ContextMsgPreview(contextItem: ChatItem, lines: Int) {
-    MessageText(contextItem, remember(contextItem.id) { attachment(contextItem) }, lines)
+    val mc = contextItem.content.msgContent
+    if (mc is MsgContent.MCChat) {
+      val hasText = contextItem.text != mc.chatLink.connLinkStr
+      val prefix = buildAnnotatedString { append(mc.chatLink.displayName + if (hasText) " - " else "") }
+      MessageText(contextItem, remember(contextItem.id) { mc.chatLink.smallIconRes }, lines, prefix = prefix, stripLink = mc.chatLink.connLinkStr)
+    } else {
+      MessageText(contextItem, remember(contextItem.id) { attachment(contextItem) }, lines)
+    }
   }
 
   val sent = contextItems[0].chatDir.sent

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/group/GroupChatInfoView.kt

@@ -167,7 +167,7 @@ fun ModalData.GroupChatInfoView(
       clearChat = { clearChatDialog(chat, close) },
       leaveGroup = { leaveGroupDialog(rhId, groupInfo, chatModel, close) },
       manageGroupLink = {
-          ModalManager.end.showModal { GroupLinkView(chatModel, rhId, groupInfo, groupLink, onGroupLinkUpdated, isChannel = groupInfo.useRelays) }
+          ModalManager.end.showModal { GroupLinkView(chatModel, rhId, groupInfo, groupLink, onGroupLinkUpdated, isChannel = groupInfo.useRelays, shareGroupInfo = groupInfo) }
       },
       onSearchClicked = onSearchClicked,
       deletingItems = deletingItems
@@ -554,6 +554,11 @@ fun ModalData.GroupChatInfoLayout(
           } else if (channelLink != null) {
             anyTopSectionRowShow = true
             ChannelLinkQRCodeSection(channelLink)
+            ShareViaChatButton {
+              chatModel.sharedContent.value = SharedContent.ChatLink(groupInfo)
+              chatModel.chatId.value = null
+              ModalManager.closeAllModalsEverywhere()
+            }
           }
           if (groupInfo.isOwner || activeSortedMembers.any { it.memberRole >= GroupMemberRole.Owner }) {
             anyTopSectionRowShow = true
@@ -1138,6 +1143,15 @@ private fun ChannelLinkQRCodeSection(groupLink: String) {
   }
 }
 
+@Composable
+private fun ShareViaChatButton(onClick: () -> Unit) {
+  SectionItemView(onClick) {
+    Icon(painterResource(MR.images.ic_forward), null, tint = MaterialTheme.colors.primary)
+    Spacer(Modifier.width(8.dp))
+    Text(stringResource(MR.strings.share_via_chat), color = MaterialTheme.colors.primary)
+  }
+}
+
 @Composable
 private fun ChannelMembersButton(rhId: Long?, groupInfo: GroupInfo, showMemberInfo: (GroupMember, GroupRelay?) -> Unit) {
   val title = if (groupInfo.isOwner) {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/group/GroupLinkView.kt

@@ -33,6 +33,7 @@ fun GroupLinkView(
   onGroupLinkUpdated: ((GroupLink?) -> Unit)?,
   creatingGroup: Boolean = false,
   isChannel: Boolean = false,
+  shareGroupInfo: GroupInfo? = null,
   close: (() -> Unit)? = null
 ) {
   var groupLinkVar by rememberSaveable(stateSaver = GroupLink.nullableStateSaver) { mutableStateOf(groupLink) }
@@ -124,6 +125,7 @@ fun GroupLinkView(
     groupLinkMemberRole,
     creatingLink,
     isChannel = isChannel,
+    shareGroupInfo = shareGroupInfo,
     createLink = ::createLink,
     showAddShortLinkAlert = ::showAddShortLinkAlert,
     updateLink = {
@@ -171,6 +173,7 @@ fun GroupLinkLayout(
   groupLinkMemberRole: MutableState<GroupMemberRole?>,
   creatingLink: Boolean,
   isChannel: Boolean = false,
+  shareGroupInfo: GroupInfo? = null,
   createLink: () -> Unit,
   showAddShortLinkAlert: ((() -> Unit)?) -> Unit,
   updateLink: () -> Unit,
@@ -230,40 +233,56 @@ fun GroupLinkLayout(
             } else null) {
           SimpleXCreatedLinkQRCode(groupLink.connLinkContact, short = showShortLink.value)
         }
-        Row(
-          horizontalArrangement = Arrangement.spacedBy(10.dp),
-          verticalAlignment = Alignment.CenterVertically,
-          modifier = Modifier.padding(horizontal = DEFAULT_PADDING, vertical = 10.dp)
-        ) {
-          val clipboard = LocalClipboardManager.current
-          SimpleButton(
-            stringResource(MR.strings.share_link),
-            icon = painterResource(MR.images.ic_share),
-            click = {
-              if (!isChannel && groupLink.shouldBeUpgraded) {
-                showAddShortLinkAlert {
-                  clipboard.shareText(groupLink.connLinkContact.simplexChatUri(short = showShortLink.value))
-                }
-              } else {
+        if (!isChannel && groupLink.shouldBeUpgraded) {
+          SettingsActionItem(
+            painterResource(MR.images.ic_add),
+            stringResource(MR.strings.upgrade_group_link),
+            click = { showAddShortLinkAlert(null) },
+            iconColor = MaterialTheme.colors.primary,
+            textColor = MaterialTheme.colors.primary,
+          )
+        }
+        val clipboard = LocalClipboardManager.current
+        SettingsActionItem(
+          painterResource(MR.images.ic_share),
+          stringResource(MR.strings.share_link),
+          click = {
+            if (!isChannel && groupLink.shouldBeUpgraded) {
+              showAddShortLinkAlert {
                 clipboard.shareText(groupLink.connLinkContact.simplexChatUri(short = showShortLink.value))
               }
+            } else {
+              clipboard.shareText(groupLink.connLinkContact.simplexChatUri(short = showShortLink.value))
             }
+          },
+          iconColor = MaterialTheme.colors.primary,
+          textColor = MaterialTheme.colors.primary,
+        )
+        if (shareGroupInfo != null) {
+          SettingsActionItem(
+            painterResource(MR.images.ic_forward),
+            stringResource(MR.strings.share_via_chat),
+            click = {
+              chatModel.sharedContent.value = SharedContent.ChatLink(shareGroupInfo)
+              chatModel.chatId.value = null
+              ModalManager.closeAllModalsEverywhere()
+            },
+            iconColor = MaterialTheme.colors.primary,
+            textColor = MaterialTheme.colors.primary,
           )
-          if (creatingGroup && close != null) {
-            ContinueButton(close)
-          } else if (!isChannel) {
-            SimpleButton(
-              stringResource(MR.strings.delete_link),
-              icon = painterResource(MR.images.ic_delete),
-              color = Color.Red,
-              click = deleteLink
-            )
-          }
         }
-        if (!isChannel && groupLink.shouldBeUpgraded) {
-          AddShortLinkButton(text = stringResource(MR.strings.upgrade_group_link)) {
-            showAddShortLinkAlert(null)
-          }
+        if (!creatingGroup && !isChannel) {
+          SettingsActionItem(
+            painterResource(MR.images.ic_delete),
+            stringResource(MR.strings.delete_link),
+            click = deleteLink,
+            iconColor = Color.Red,
+            textColor = Color.Red,
+          )
+        }
+        if (creatingGroup && close != null) {
+          Spacer(Modifier.height(DEFAULT_PADDING_HALF))
+          ContinueButton(close)
         }
       }
     }
@@ -271,17 +290,6 @@ fun GroupLinkLayout(
   }
 }
 
-@Composable
-private fun AddShortLinkButton(text: String, onClick: () -> Unit) {
-  SettingsActionItem(
-    painterResource(MR.images.ic_add),
-    text,
-    onClick,
-    iconColor = MaterialTheme.colors.primary,
-    textColor = MaterialTheme.colors.primary,
-  )
-}
-
 @Composable
 private fun RoleSelectionRow(groupInfo: GroupInfo, selectedRole: MutableState<GroupMemberRole?>, enabled: Boolean = true) {
   Row(

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/group/GroupProfileView.kt

@@ -119,7 +119,7 @@ fun GroupProfileLayout(
             ) {
               Box(contentAlignment = Alignment.TopEnd) {
                 Box(contentAlignment = Alignment.Center) {
-                  ProfileImage(108.dp, profileImage.value, color = MaterialTheme.colors.secondary.copy(alpha = 0.1f))
+                  ProfileImage(108.dp, profileImage.value, icon = groupInfo.chatIconName, color = MaterialTheme.colors.secondary.copy(alpha = 0.1f))
                   EditImageButton { scope.launch { bottomSheetModalState.show() } }
                 }
                 if (profileImage.value != null) {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/item/CIChatLinkHeader.kt

@@ -0,0 +1,79 @@
+package chat.simplex.common.views.chat.item
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import chat.simplex.common.model.*
+import chat.simplex.common.ui.theme.*
+import chat.simplex.common.views.helpers.ProfileImage
+import chat.simplex.res.MR
+import dev.icerock.moko.resources.compose.stringResource
+
+@Composable
+fun CIChatLinkHeader(
+  chatLink: MsgChatLink,
+  ownerSig: LinkOwnerSig?,
+  hasText: Boolean,
+) {
+  Column(
+    Modifier
+      .defaultMinSize(minWidth = 220.dp)
+      .padding(start = 8.dp, end = 12.dp, top = 8.dp, bottom = 4.dp)
+  ) {
+    Row(
+      Modifier.defaultMinSize(minWidth = 220.dp)
+    ) {
+      ProfileImage(
+        size = 54.dp,
+        image = chatLink.image,
+        icon = chatLink.iconRes,
+        color = if (isInDarkTheme()) FileDark else FileLight
+      )
+      Spacer(Modifier.width(8.dp))
+      Column(
+        Modifier.defaultMinSize(minHeight = 54.dp),
+        verticalArrangement = Arrangement.Center
+      ) {
+        Text(
+          chatLink.displayName,
+          style = MaterialTheme.typography.caption,
+          fontWeight = FontWeight.Medium,
+          maxLines = 2,
+          overflow = TextOverflow.Ellipsis
+        )
+        val fn = chatLink.fullName
+        if (fn.isNotEmpty() && fn != chatLink.displayName) {
+          Text(fn, maxLines = 2, overflow = TextOverflow.Ellipsis)
+        }
+      }
+    }
+    Divider(Modifier.fillMaxWidth().padding(top = 8.dp))
+    Column(Modifier.padding(top = 8.dp, bottom = 4.dp, start = 4.dp), verticalArrangement = Arrangement.spacedBy(2.dp)) {
+      chatLink.shortDescription?.let { descr ->
+        Text(
+          descr,
+          color = MaterialTheme.colors.secondary,
+          fontSize = 13.sp,
+          lineHeight = 18.sp,
+          maxLines = 2,
+          overflow = TextOverflow.Ellipsis,
+        )
+      }
+      Text(
+        chatLink.infoLine(signed = ownerSig != null),
+        color = MaterialTheme.colors.secondary,
+        fontSize = 13.sp,
+        lineHeight = 18.sp,
+      )
+      Text(
+        stringResource(MR.strings.tap_to_open),
+        color = MaterialTheme.colors.primary,
+      )
+    }
+  }
+}

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/item/CIFileView.kt

@@ -127,7 +127,8 @@ fun CIFileView(
   fun fileIndicator() {
     Box(
       Modifier
-        .size(42.sp.toDp() * sizeMultiplier)
+        .padding(top = 2.sp.toDp())
+        .size(40.sp.toDp() * sizeMultiplier)
         .clip(RoundedCornerShape(4.sp.toDp() * sizeMultiplier)),
       contentAlignment = Alignment.Center
     ) {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/item/CIGroupInvitationView.kt

@@ -15,6 +15,7 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
 import chat.simplex.common.ui.theme.*
 import chat.simplex.common.views.helpers.*
 import chat.simplex.common.model.*
@@ -52,15 +53,12 @@ fun CIGroupInvitationView(
       else if (isInDarkTheme()) FileDark else FileLight
 
     Row(
-      Modifier
-        .defaultMinSize(minWidth = 220.dp)
-        .padding(vertical = 4.dp)
-        .padding(end = 2.dp)
+      Modifier.defaultMinSize(minWidth = 220.dp)
     ) {
-      ProfileImage(size = 60.dp, image = groupInvitation.groupProfile.image, icon = MR.images.ic_supervised_user_circle_filled, color = iconColor)
-      Spacer(Modifier.padding(horizontal = 3.dp))
+      ProfileImage(size = 54.dp, image = groupInvitation.groupProfile.image, icon = MR.images.ic_supervised_user_circle_filled, color = iconColor)
+      Spacer(Modifier.width(8.dp))
       Column(
-        Modifier.defaultMinSize(minHeight = 60.dp),
+        Modifier.defaultMinSize(minHeight = 54.dp),
         verticalArrangement = Arrangement.Center
       ) {
         Text(p.displayName, style = MaterialTheme.typography.caption, fontWeight = FontWeight.Medium, maxLines = 2, overflow = TextOverflow.Ellipsis)
@@ -98,8 +96,7 @@ fun CIGroupInvitationView(
     Box(
       Modifier
         .width(IntrinsicSize.Min)
-        .padding(vertical = 3.dp)
-        .padding(start = 8.dp, end = 12.dp),
+        .padding(start = 8.dp, end = 12.dp, top = 8.dp, bottom = 4.dp),
       contentAlignment = Alignment.BottomEnd
     ) {
       Box(
@@ -112,10 +109,10 @@ fun CIGroupInvitationView(
         ) {
           groupInfoView()
           val secondaryColor = MaterialTheme.colors.secondary
-          Column(Modifier.padding(top = 2.dp, start = 5.dp)) {
-            Divider(Modifier.fillMaxWidth().padding(bottom = 4.dp))
+          Divider(Modifier.fillMaxWidth().padding(top = 8.dp))
+          Column(Modifier.padding(top = 8.dp, bottom = 4.dp, start = 4.dp), verticalArrangement = Arrangement.spacedBy(2.dp)) {
             if (action) {
-              Text(groupInvitationStr())
+              Text(groupInvitationStr(), fontSize = 13.sp, lineHeight = 18.sp)
               Text(
                 buildAnnotatedString {
                   append(generalGetString(if (chatIncognito) MR.strings.group_invitation_tap_to_join_incognito else MR.strings.group_invitation_tap_to_join))
@@ -131,7 +128,9 @@ fun CIGroupInvitationView(
                 buildAnnotatedString {
                   append(groupInvitationStr())
                   withStyle(reserveTimestampStyle) { append(reserveSpaceForMeta(ci.meta, timedMessagesTTL, encrypted = null, showStatus = false, showEdited = false, secondaryColor = secondaryColor, showTimestamp = showTimestamp)) }
-                }
+                },
+                fontSize = 13.sp,
+                lineHeight = 18.sp,
               )
             }
           }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/item/FramedItemView.kt

@@ -23,6 +23,7 @@ import chat.simplex.common.platform.*
 import chat.simplex.common.ui.theme.*
 import chat.simplex.common.views.chat.*
 import chat.simplex.common.views.helpers.*
+import chat.simplex.common.views.newchat.planAndConnect
 import chat.simplex.res.MR
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
@@ -55,7 +56,7 @@ fun FramedItemView(
   }
 
   @Composable
-  fun ciQuotedMsgTextView(qi: CIQuote, lines: Int, showTimestamp: Boolean) {
+  fun ciQuotedMsgTextView(qi: CIQuote, lines: Int, showTimestamp: Boolean, stripLink: String? = null, prefix: AnnotatedString? = null) {
     MarkdownText(
       qi.text,
       qi.formattedText,
@@ -66,11 +67,13 @@ fun FramedItemView(
       linkMode = linkMode,
       uriHandler = if (appPlatform.isDesktop) uriHandler else null,
       showTimestamp = showTimestamp,
+      prefix = prefix,
+      stripLink = stripLink,
     )
   }
 
   @Composable
-  fun ciQuotedMsgView(qi: CIQuote) {
+  fun ciQuotedMsgView(qi: CIQuote, stripLink: String? = null, prefix: AnnotatedString? = null) {
     Box(
       Modifier
         // this width limitation prevents crash on calculating constraints that may happen if you post veeeery long message and then quote it.
@@ -89,10 +92,10 @@ fun FramedItemView(
             style = TextStyle(fontSize = 13.5.sp, color = if (qi.chatDir is CIDirection.GroupSnd) CurrentColors.value.colors.primary else CurrentColors.value.colors.secondary),
             maxLines = 1
           )
-          ciQuotedMsgTextView(qi, lines = 2,  showTimestamp = showTimestamp)
+          ciQuotedMsgTextView(qi, lines = 2, showTimestamp = showTimestamp, stripLink = stripLink, prefix = prefix)
         }
       } else {
-        ciQuotedMsgTextView(qi, lines = 3,  showTimestamp = showTimestamp)
+        ciQuotedMsgTextView(qi, lines = 3, showTimestamp = showTimestamp, stripLink = stripLink, prefix = prefix)
       }
     }
   }
@@ -177,6 +180,20 @@ fun FramedItemView(
             tint = if (isInDarkTheme()) FileDark else FileLight
           )
         }
+        is MsgContent.MCChat -> {
+          val prefix = buildAnnotatedString {
+            append(qi.content.chatLink.displayName + if (qi.content.text != qi.content.chatLink.connLinkStr) " - " else "")
+          }
+          Box(Modifier.fillMaxWidth().weight(1f)) {
+            ciQuotedMsgView(qi, stripLink = qi.content.chatLink.connLinkStr, prefix = prefix)
+          }
+          Icon(
+            painterResource(qi.content.chatLink.smallIconRes),
+            null,
+            Modifier.padding(top = 6.dp, end = 4.dp).size(22.dp),
+            tint = if (isInDarkTheme()) FileDark else FileLight
+          )
+        }
         else -> ciQuotedMsgView(qi)
       }
     }
@@ -329,6 +346,22 @@ fun FramedItemView(
                   CIMarkdownText(chatsCtx, ci, chat, chatTTL, linkMode, uriHandler, onLinkLongClick, showViaProxy = showViaProxy, showTimestamp = showTimestamp)
                 }
               }
+              is MsgContent.MCChat -> {
+                val hasText = mc.text != mc.chatLink.connLinkStr
+                Box(
+                  Modifier.combinedClickable(
+                    onClick = {
+                      withBGApi { planAndConnect(chat.remoteHostId, mc.chatLink.connLinkStr, linkOwnerSig = mc.ownerSig, close = null) }
+                    },
+                    onLongClick = { showMenu.value = true }
+                  )
+                ) {
+                  CIChatLinkHeader(chatLink = mc.chatLink, ownerSig = mc.ownerSig, hasText = hasText)
+                }
+                if (hasText) {
+                  CIMarkdownText(chatsCtx, ci, chat, chatTTL, linkMode, uriHandler, showViaProxy = showViaProxy, showTimestamp = showTimestamp, stripLink = mc.chatLink.connLinkStr)
+                }
+              }
               is MsgContent.MCReport -> {
                 val prefix = buildAnnotatedString {
                   withStyle(SpanStyle(color = Color.Red, fontStyle = FontStyle.Italic)) {
@@ -366,7 +399,8 @@ fun CIMarkdownText(
   onLinkLongClick: (link: String) -> Unit = {},
   showViaProxy: Boolean,
   showTimestamp: Boolean,
-  prefix: AnnotatedString? = null
+  prefix: AnnotatedString? = null,
+  stripLink: String? = null
 ) {
   val chatInfo = chat.chatInfo
   val text = if (ci.meta.isLive) ci.content.msgContent?.text ?: ci.text else ci.text
@@ -382,6 +416,7 @@ fun CIMarkdownText(
         else -> null
       },
       uriHandler = uriHandler, senderBold = true, onLinkLongClick = onLinkLongClick, showViaProxy = showViaProxy, showTimestamp = showTimestamp, prefix = prefix,
+      stripLink = stripLink,
       selectionRange = selection.highlightRange,
       onTextLayoutResult = selection.onTextLayoutResult
     )

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/item/TextItemView.kt

@@ -109,9 +109,12 @@ fun MarkdownText (
   showViaProxy: Boolean = false,
   showTimestamp: Boolean = true,
   prefix: AnnotatedString? = null,
+  stripLink: String? = null,
   selectionRange: IntRange? = null,
   onTextLayoutResult: ((TextLayoutResult) -> Unit)? = null
 ) {
+  val text = if (stripLink != null) stripTextLink(text.toString(), stripLink) else text
+  val formattedText = if (stripLink != null) stripFormattedTextLink(formattedText, stripLink) else formattedText
   val textLayoutDirection = remember (text) {
     if (isRtl(text.subSequence(0, kotlin.math.min(50, text.length)))) LayoutDirection.Rtl else LayoutDirection.Ltr
   }
@@ -532,3 +535,20 @@ private fun isRtl(s: CharSequence): Boolean {
 }
 
 fun mentionText(name: String): String = if (name.contains(" @"))  "@'$name'" else "@$name"
+
+fun stripTextLink(text: String, link: String): String =
+  if (text == link) ""
+  else if (text.endsWith("\n$link")) text.dropLast(link.length + 1)
+  else text
+
+fun stripFormattedTextLink(ft: List<FormattedText>?, link: String): List<FormattedText>? {
+  if (ft == null || ft.isEmpty() || ft.last().text != link) return ft
+  val result = ft.toMutableList()
+  result.removeLast()
+  val i = result.lastIndex
+  if (i >= 0 && result[i].format == null && result[i].text.endsWith("\n")) {
+    result[i] = FormattedText(result[i].text.dropLast(1), null)
+    if (result[i].text.isEmpty()) result.removeLast()
+  }
+  return result.ifEmpty { null }
+}

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chatlist/ChatPreviewView.kt

@@ -31,6 +31,7 @@ import chat.simplex.common.model.ChatController.appPrefs
 import chat.simplex.common.model.GroupInfo
 import chat.simplex.common.platform.*
 import chat.simplex.common.views.chat.*
+import chat.simplex.common.views.newchat.planAndConnect
 import chat.simplex.common.views.chat.item.*
 import chat.simplex.res.MR
 import dev.icerock.moko.resources.ImageResource
@@ -241,12 +242,18 @@ fun ChatPreviewView(
       Text(previewText.first, color = previewText.second)
     } else if (ci != null && showChatPreviews) {
       val (text: CharSequence, inlineTextContent) = when {
-        ci.meta.itemDeleted == null -> ci.text(chat.chatInfo.isChannel) to null
-        else -> markedDeletedText(ci, chat.chatInfo) to null
+        ci.meta.itemDeleted != null -> markedDeletedText(ci, chat.chatInfo) to null
+        ci.content.msgContent is MsgContent.MCChat -> {
+          val chatLink = (ci.content.msgContent as MsgContent.MCChat).chatLink
+          val descr = chatLink.shortDescription?.let { "\n$it" } ?: ""
+          (chatLink.displayName + descr) to null
+        }
+        else -> ci.text(chat.chatInfo.isChannel) to null
       }
-      val formattedText = when {
-        ci.meta.itemDeleted == null -> ci.formattedText
-        else -> null
+      val formattedText: List<FormattedText>? = when {
+        ci.meta.itemDeleted != null -> null
+        ci.content.msgContent is MsgContent.MCChat -> null
+        else -> ci.formattedText
       }
       val prefix = when (val mc = ci.content.msgContent) {
         is MsgContent.MCReport ->
@@ -332,6 +339,19 @@ fun ChatPreviewView(
           withBGApi { chatModel.controller.receiveFile(chat.remoteHostId, user, it) }
         }
       }
+      is MsgContent.MCChat -> SmallContentPreview(borderColor = if (mc.chatLink.image != null) MaterialTheme.colors.onSurface.copy(alpha = 0.12f) else Color.Transparent) {
+        Box(
+          Modifier.fillMaxSize().clickable { withBGApi { planAndConnect(chat.remoteHostId, mc.chatLink.connLinkStr, linkOwnerSig = mc.ownerSig, close = null) } },
+          contentAlignment = Alignment.Center
+        ) {
+          val image = mc.chatLink.image
+          if (image != null) {
+            Image(base64ToBitmap(image), null, contentScale = ContentScale.Crop, modifier = Modifier.fillMaxSize())
+          } else {
+            Icon(painterResource(mc.chatLink.iconRes), null, Modifier.size(44.sp.toDp()), tint = if (isInDarkTheme()) FileDark else FileLight)
+          }
+        }
+      }
       else -> {}
     }
   }
@@ -500,8 +520,8 @@ fun ChatPreviewView(
 }
 
 @Composable
-private fun SmallContentPreview(content: @Composable BoxScope.() -> Unit) {
-  Box(Modifier.padding(top = 2.sp.toDp(), end = 8.sp.toDp()).size(36.sp.toDp()).border(1.dp, MaterialTheme.colors.onSurface.copy(alpha = 0.12f), RoundedCornerShape(22)).clip(RoundedCornerShape(22))) {
+private fun SmallContentPreview(borderColor: Color = MaterialTheme.colors.onSurface.copy(alpha = 0.12f), content: @Composable BoxScope.() -> Unit) {
+  Box(Modifier.padding(top = 2.sp.toDp(), end = 8.sp.toDp()).size(36.sp.toDp()).border(0.5.dp, borderColor, RoundedCornerShape(22)).clip(RoundedCornerShape(22))) {
     content()
   }
 }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chatlist/ShareListView.kt

@@ -51,6 +51,9 @@ fun ShareListView(chatModel: ChatModel, stopped: Boolean) {
           }
         }
       }
+      is SharedContent.ChatLink -> {
+        hasSimplexLink = true
+      }
       null -> {}
     }
     if (chatModel.chats.value.isNotEmpty()) {
@@ -98,7 +101,7 @@ private fun ShareListToolbar(chatModel: ChatModel, stopped: Boolean, onSearchVal
   val navButton: @Composable RowScope.() -> Unit = {
     when {
       showSearch -> NavigationButtonBack(hideSearchOnBack)
-      (users.size > 1 || chatModel.remoteHosts.isNotEmpty()) && remember { chatModel.sharedContent }.value !is SharedContent.Forward -> {
+      (users.size > 1 || chatModel.remoteHosts.isNotEmpty()) && remember { chatModel.sharedContent }.value !is SharedContent.Forward && remember { chatModel.sharedContent }.value !is SharedContent.ChatLink -> {
         val allRead = users
           .filter { u -> !u.user.activeUser && !u.user.hidden }
           .all { u -> u.unreadCount == 0 }
@@ -129,6 +132,8 @@ private fun ShareListToolbar(chatModel: ChatModel, stopped: Boolean, onSearchVal
         chatModel.sharedContent.value = null
         if (sharedContent is SharedContent.Forward) {
           chatModel.chatId.value = sharedContent.fromChatInfo.id
+        } else if (sharedContent is SharedContent.ChatLink) {
+          chatModel.chatId.value = sharedContent.groupInfo.id
         }
       })
     }
@@ -144,6 +149,7 @@ private fun ShareListToolbar(chatModel: ChatModel, stopped: Boolean, onSearchVal
             is SharedContent.Media -> stringResource(MR.strings.share_image)
             is SharedContent.File -> stringResource(MR.strings.share_file)
             is SharedContent.Forward -> if (v.chatItems.size > 1) stringResource(MR.strings.forward_multiple) else stringResource(MR.strings.forward_message)
+            is SharedContent.ChatLink -> stringResource(MR.strings.share_channel)
             null -> stringResource(MR.strings.share_message)
           },
           color = MaterialTheme.colors.onBackground,

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/helpers/AlertManager.kt

@@ -273,6 +273,7 @@ class AlertManager {
     profileFullName: String,
     profileImage: @Composable () -> Unit,
     subtitle: String? = null,
+    information: String? = null,
     confirmText: String? = generalGetString(MR.strings.connect_plan_open_chat),
     onConfirm: (() -> Unit)? = null,
     dismissText: String = generalGetString(MR.strings.cancel_verb),
@@ -329,6 +330,16 @@ class AlertManager {
                     modifier = Modifier.fillMaxWidth()
                   )
                 }
+                if (information != null) {
+                  Spacer(Modifier.height(DEFAULT_PADDING_HALF))
+                  Text(
+                    information,
+                    textAlign = TextAlign.Center,
+                    style = MaterialTheme.typography.body2,
+                    maxLines = 3,
+                    modifier = Modifier.fillMaxWidth()
+                  )
+                }
               }
 
               Column(

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/helpers/Enums.kt

@@ -15,6 +15,7 @@ sealed class SharedContent {
   data class Media(val text: String, val uris: List<URI>): SharedContent()
   data class File(val text: String, val uri: URI): SharedContent()
   data class Forward(val chatItems: List<ChatItem>, val fromChatInfo: ChatInfo): SharedContent()
+  data class ChatLink(val groupInfo: GroupInfo): SharedContent()
 }
 
 enum class AnimatedViewState {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/newchat/AddChannelView.kt

@@ -65,7 +65,7 @@ fun AddChannelView(chatModel: ChatModel, close: () -> Unit, closeAll: () -> Unit
           withBGApi {
             openGroupChat(null, gInfo.groupId)
             ModalManager.end.showModalCloseable(true) { close ->
-              GroupLinkView(chatModel, rhId = null, groupInfo = gInfo, groupLink = groupLink.value, onGroupLinkUpdated = null, creatingGroup = true, isChannel = true, close = close)
+              GroupLinkView(chatModel, rhId = null, groupInfo = gInfo, groupLink = groupLink.value, onGroupLinkUpdated = null, creatingGroup = true, isChannel = true, shareGroupInfo = gInfo, close = close)
             }
           }
         }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/newchat/ConnectPlan.kt

@@ -24,6 +24,7 @@ enum class ConnectionLinkType {
 suspend fun planAndConnect(
   rhId: Long?,
   shortOrFullLink: String,
+  linkOwnerSig: LinkOwnerSig? = null,
   close: (() -> Unit)?,
   cleanup: (() -> Unit)? = null,
   filterKnownContact: ((Contact) -> Unit)? = null,
@@ -44,12 +45,13 @@ suspend fun planAndConnect(
     inProgress.value = false
     cleanup?.invoke()
   }
-  return planAndConnectTask(rhId, shortOrFullLink, close, cleanup, filterKnownContact, filterKnownGroup, inProgress)
+  return planAndConnectTask(rhId, shortOrFullLink, linkOwnerSig, close, cleanup, filterKnownContact, filterKnownGroup, inProgress)
 }
 
 private suspend fun planAndConnectTask(
   rhId: Long?,
   shortOrFullLink: String,
+  linkOwnerSig: LinkOwnerSig? = null,
   close: (() -> Unit)?,
   cleanup: (() -> Unit)? = null,
   filterKnownContact: ((Contact) -> Unit)? = null,
@@ -66,7 +68,7 @@ private suspend fun planAndConnectTask(
     cleanup?.invoke()
     completable.complete(!completable.isActive)
   }
-  val result = chatModel.controller.apiConnectPlan(rhId, shortOrFullLink, inProgress = inProgress)
+  val result = chatModel.controller.apiConnectPlan(rhId, shortOrFullLink, linkOwnerSig, inProgress = inProgress)
   connectProgressManager.stopConnectProgress()
   if (!inProgress.value) { return completable }
   if (result != null) {
@@ -85,6 +87,7 @@ private suspend fun planAndConnectTask(
               rhId,
               connectionLink,
               connectionPlan.invitationLinkPlan.contactSLinkData_,
+              ownerVerification = connectionPlan.invitationLinkPlan.ownerVerification,
               close,
               cleanup
             )
@@ -96,6 +99,7 @@ private suspend fun planAndConnectTask(
               text = generalGetString(MR.strings.profile_will_be_sent_to_contact_sending_link) + linkText,
               connectDestructive = false,
               cleanup = cleanup,
+              ownerVerification = connectionPlan.invitationLinkPlan.ownerVerification,
             )
           }
         InvitationLinkPlan.OwnLink -> {
@@ -146,6 +150,7 @@ private suspend fun planAndConnectTask(
               rhId,
               connectionLink,
               connectionPlan.contactAddressPlan.contactSLinkData_,
+              ownerVerification = connectionPlan.contactAddressPlan.ownerVerification,
               close,
               cleanup
             )
@@ -157,6 +162,7 @@ private suspend fun planAndConnectTask(
               text = generalGetString(MR.strings.profile_will_be_sent_to_contact_sending_link) + linkText,
               connectDestructive = false,
               cleanup,
+              ownerVerification = connectionPlan.contactAddressPlan.ownerVerification,
             )
           }
         ContactAddressPlan.OwnLink -> {
@@ -215,6 +221,7 @@ private suspend fun planAndConnectTask(
               connectionLink,
               connectionPlan.groupLinkPlan.groupSLinkInfo_,
               connectionPlan.groupLinkPlan.groupSLinkData_,
+              ownerVerification = connectionPlan.groupLinkPlan.ownerVerification,
               close,
               cleanup
             )
@@ -226,6 +233,7 @@ private suspend fun planAndConnectTask(
               text = generalGetString(MR.strings.you_will_join_group) + linkText,
               connectDestructive = false,
               cleanup = cleanup,
+              ownerVerification = connectionPlan.groupLinkPlan.ownerVerification,
             )
           }
         is GroupLinkPlan.OwnLink -> {
@@ -292,7 +300,7 @@ private suspend fun planAndConnectTask(
                 ProfileImage(
                   size = alertProfileImageSize,
                   image = groupSLinkData.groupProfile.image,
-                  icon = MR.images.ic_bigtop_updates_padded
+                  icon = MR.images.ic_bigtop_updates_circle_filled
                 )
               },
               subtitle = generalGetString(MR.strings.channel_no_active_relays_try_later),
@@ -375,10 +383,12 @@ fun askCurrentOrIncognitoProfileAlert(
   text: String? = null,
   connectDestructive: Boolean,
   cleanup: (() -> Unit)?,
+  ownerVerification: OwnerVerification? = null,
 ) {
+  val fullText = listOfNotNull(text, ownerVerificationMessage(ownerVerification)).joinToString("\n\n").ifEmpty { null }
   AlertManager.privacySensitive.showAlertDialogButtonsColumn(
     title = title,
-    text = text,
+    text = fullText,
     buttons = {
       Column {
         val connectColor = if (connectDestructive) MaterialTheme.colors.error else MaterialTheme.colors.primary
@@ -573,6 +583,7 @@ fun showPrepareContactAlert(
   rhId: Long?,
   connectionLink: CreatedConnLink,
   contactShortLinkData: ContactShortLinkData,
+  ownerVerification: OwnerVerification? = null,
   close: (() -> Unit)?,
   cleanup: (() -> Unit)?
 ) {
@@ -589,6 +600,7 @@ fun showPrepareContactAlert(
           else MR.images.ic_account_circle_filled
       )
     },
+    information = ownerVerificationMessage(ownerVerification),
     confirmText = generalGetString(MR.strings.connect_plan_open_new_chat),
     onConfirm = {
       AlertManager.privacySensitive.hideAlert()
@@ -614,6 +626,7 @@ fun showPrepareGroupAlert(
   connectionLink: CreatedConnLink,
   groupShortLinkInfo: GroupShortLinkInfo?,
   groupShortLinkData: GroupShortLinkData,
+  ownerVerification: OwnerVerification? = null,
   close: (() -> Unit)?,
   cleanup: (() -> Unit)?
 ) {
@@ -626,10 +639,11 @@ fun showPrepareGroupAlert(
       ProfileImage(
         size = alertProfileImageSize,
         image = groupShortLinkData.groupProfile.image,
-        icon = if (isChannel) MR.images.ic_bigtop_updates_padded else MR.images.ic_supervised_user_circle_filled
+        icon = if (isChannel) MR.images.ic_bigtop_updates_circle_filled else MR.images.ic_supervised_user_circle_filled
       )
     },
     subtitle = subscriberCount,
+    information = ownerVerificationMessage(ownerVerification),
     confirmText = generalGetString(if (isChannel) MR.strings.connect_plan_open_new_channel else MR.strings.connect_plan_open_new_group),
     onConfirm = {
       AlertManager.privacySensitive.hideAlert()
@@ -657,3 +671,9 @@ fun showPrepareGroupAlert(
     }
   )
 }
+
+fun ownerVerificationMessage(ov: OwnerVerification?): String? = when (ov) {
+  is OwnerVerification.Verified -> generalGetString(MR.strings.owner_verification_passed)
+  is OwnerVerification.Failed -> String.format(generalGetString(MR.strings.owner_verification_failed), ov.reason)
+  null -> null
+}

apps/multiplatform/common/src/commonMain/resources/MR/base/strings.xml

@@ -533,8 +533,21 @@
   <string name="share_file">Share file…</string>
   <string name="forward_message">Forward message…</string>
   <string name="forward_multiple">Forward messages…</string>
+  <string name="share_channel">Share channel…</string>
   <string name="cannot_share_message_alert_title">Cannot send message</string>
   <string name="cannot_share_message_alert_text">Selected chat preferences prohibit this message.</string>
+  <string name="share_via_chat">Share via chat</string>
+  <string name="tap_to_open">Tap to open</string>
+  <string name="chat_link_channel">Channel link</string>
+  <string name="chat_link_group">Group link</string>
+  <string name="chat_link_business_address">Business address</string>
+  <string name="chat_link_contact_address">Contact address</string>
+  <string name="chat_link_one_time">One-time link</string>
+  <string name="chat_link_from_owner">(from owner)</string>
+  <string name="chat_link_signed">(signed)</string>
+  <string name="error_sharing_channel">Error sharing channel</string>
+  <string name="owner_verification_passed">Link signature verified.</string>
+  <string name="owner_verification_failed">⚠️ Signature verification failed: %s.</string>
 
   <!-- ComposeView.kt, helpers -->
   <string name="attach">Attach</string>

apps/multiplatform/common/src/commonMain/resources/MR/images/ic_bigtop_updates_circle_filled.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="22" viewBox="0 -960 960 960" width="22"><path fill-rule="evenodd" d="M480-85A395 395 0 1 0 479.99-85Z M234.3-480q0 44.1 15.05 84.88T293.1-321.1q5.25 5.6 5.77 13.12T294.15-295.2q-5.6 5.6-12.25 4.2t-11.9-7q-33.6-37.45-51.45-84.52T200.7-480q0-50.4 17.85-97.47T270-662.35q5.25-5.25 11.9-6.3t12.07 4.38q5.42 5.42 4.9 12.6T293.1-639.25q-28.7 33.6-43.75 74.38T234.3-480Zm100.62 50.22q8.22 24.32 24.32 44.62 4.55 5.6 4.9 12.6t-5.07 12.42q-5.42 5.42-12.25 5.07T335.45-361q-20.3-25.2-31.32-55.82T293.1-480q0-32.55 11.02-63.17T335.45-599q4.55-5.6 11.38-6.3t12.25 4.72q5.42 5.42 5.07 12.42t-4.9 12.25q-16.1 20.3-24.32 45.15T326.7-480q0 25.9 8.22 50.22ZM460.05-193v-227.5q-19.6-5.95-31.15-22.57T417.35-480q0-26.25 18.2-44.62T480-543q26.25 0 44.62 18.38T543-480q0 20.3-11.72 36.92T500.3-420.5v227.5q0 8.75-5.77 14.35t-14.52 5.6q-8.75 0-14.35-5.6t-5.6-14.35Zm165.02-337.22Q616.85-554.55 601.1-575.2q-4.9-5.25-5.25-12.25t5.07-12.42q5.42-5.42 12.25-5.07t11.38 5.95q20.3 25.2 31.32 55.82T666.9-480q0 32.55-11.02 63.17T624.55-361q-4.55 5.6-11.02 5.95t-11.9-5.07Q596.2-365.55 596.2-372.55t4.9-12.6q15.75-20.3 23.97-44.62T633.3-480q0-25.9-8.22-50.22ZM725.7-480q0-44.1-15.05-84.88T666.9-639.25q-5.25-5.25-5.77-12.77t4.9-12.95Q671.45-670.4 678.1-669t12.25 6.65q33.25 37.8 51.1 84.88T759.3-480q0 50.4-17.85 97.47T690.35-298q-5.6 5.6-12.25 6.65t-12.07-4.38q-5.42-5.42-4.9-12.6T666.9-321.1q28.7-33.25 43.75-74.02T725.7-480Z"/></svg>

apps/multiplatform/common/src/commonMain/resources/MR/images/ic_bigtop_updates_padded.svg

@@ -1,8 +0,0 @@
-<svg width="1240" height="1240" xmlns="http://www.w3.org/2000/svg">
-
- <g>
-  <g transform="translate(164, 1076) scale(0.95)">
-   <path d="M129-560q0 63 21.5 121.25T213-333q7.5 8 8.25 18.75T214.5-296q-8 8-17.5 6t-17-10q-48-53.5-73.5-120.75T81-560q0-72 25.5-139.25T180-820.5q7.5-7.5 17-9t17.25 6.25q7.75 7.75 7 18T213-787.5q-41 48-62.5 106.25T129-560Zm143.75 71.75q11.75 34.75 34.75 63.75 6.5 8 7 18t-7.25 17.75q-7.75 7.75-17.5 7.25T273.5-390q-29-36-44.75-79.75T213-560q0-46.5 15.75-90.25T273.5-730q6.5-8 16.25-9t17.5 6.75q7.75 7.75 7.25 17.75t-7 17.5q-23 29-34.75 64.5T261-560q0 37 11.75 71.75ZM451.5-150v-325q-28-8.5-44.5-32.25T390.5-560q0-37.5 26-63.75T480-650q37.5 0 63.75 26.25T570-560q0 29-16.75 52.75T509-475v325q0 12.5-8.25 20.5t-20.75 8q-12.5 0-20.5-8t-8-20.5Zm235.75-481.75Q675.5-666.5 653-696q-7-7.5-7.5-17.5t7.25-17.75q7.75-7.75 17.5-7.25t16.25 8.5q29 36 44.75 79.75T747-560q0 46.5-15.75 90.25T686.5-390q-6.5 8-15.75 8.5t-17-7.25Q646-396.5 646-406.5t7-18q22.5-29 34.25-63.75T699-560q0-37-11.75-71.75ZM831-560q0-63-21.5-121.25T747-787.5q-7.5-7.5-8.25-18.25t7-18.5Q753.5-832 763-830t17.5 9.5q47.5 54 73 121.25T879-560q0 72-25.5 139.25T780.5-300q-8 8-17.5 9.5t-17.25-6.25q-7.75-7.75-7-18T747-333q41-47.5 62.5-105.75T831-560Z"/>
-  </g>
- </g>
-</svg>

plans/2026-04-17-kotlin-share-channel-link.md

@@ -0,0 +1,561 @@
+# Kotlin/Desktop — Share chat card (MCChat) — Implementation Plan
+
+Port of iOS commit `f49d98511` to Kotlin multiplatform codebase. Every section maps an iOS change to its Kotlin equivalent with file:line anchors.
+
+---
+
+## 1. Types — `ChatModel.kt`
+
+### 1.1 Add `LinkOwnerSig` (new type, near line 4551 after `MsgChatLink`)
+
+```kotlin
+@Serializable
+data class LinkOwnerSig(
+    val ownerId: String? = null,
+    val chatBinding: String,
+    val ownerSig: String
+)
+```
+
+iOS equivalent: `ChatTypes.swift` `LinkOwnerSig` struct.
+
+### 1.2 Add `ownerSig` to `MCChat` (line ~4310)
+
+Current: `class MCChat(override val text: String, val chatLink: MsgChatLink): MsgContent()`
+Change to: `class MCChat(override val text: String, val chatLink: MsgChatLink, val ownerSig: LinkOwnerSig? = null): MsgContent()`
+
+### 1.3 Add `chatLinkStr` property to `MsgContent` (near `text` property)
+
+```kotlin
+val chatLinkStr: String?
+    get() = (this as? MCChat)?.chatLink?.connLinkStr
+```
+
+### 1.4 Update `MsgContentSerializer` (lines 4366-4496)
+
+In the `"chat"` case of the deserializer, add `ownerSig` field:
+```kotlin
+"chat" -> {
+    val text = json["text"]?.jsonPrimitive?.content ?: ""
+    val chatLink = Json.decodeFromJsonElement<MsgChatLink>(json["chatLink"]!!)
+    val ownerSig = json["ownerSig"]?.let { Json.decodeFromJsonElement<LinkOwnerSig>(it) }
+    MCChat(text, chatLink, ownerSig)
+}
+```
+
+In the serializer, add `ownerSig` to the `MCChat` case:
+```kotlin
+is MCChat -> buildJsonObject {
+    put("type", "chat")
+    put("text", mc.text)
+    put("chatLink", Json.encodeToJsonElement(mc.chatLink))
+    mc.ownerSig?.let { put("ownerSig", Json.encodeToJsonElement(it)) }
+}
+```
+
+### 1.5 Add computed properties to `MsgChatLink` (line ~4547)
+
+The existing `MsgChatLink` sealed class uses `@SerialName` annotations for JSON. The Haskell side uses `taggedObjectJSON` format (`{"type": "group", ...}`). Need to verify the existing `@SerialName` produces the right format — it should, since kotlinx.serialization with `classDiscriminator = "type"` matches.
+
+Add after the sealed class definition:
+```kotlin
+sealed class MsgChatLink {
+    // ... existing cases ...
+
+    val isPublicGroup: Boolean
+        get() = (this as? Group)?.groupProfile?.publicGroup != null
+
+    val connLinkStr: String
+        get() = when (this) {
+            is Group -> connLink
+            is Contact -> connLink
+            is Invitation -> invLink
+        }
+
+    val image: String?
+        get() = when (this) {
+            is Group -> groupProfile.image
+            is Contact -> profile.image
+            is Invitation -> profile.image
+        }
+
+    val displayName: String
+        get() = when (this) {
+            is Group -> groupProfile.displayName
+            is Contact -> profile.displayName
+            is Invitation -> profile.displayName
+        }
+
+    val fullName: String
+        get() = when (this) {
+            is Group -> groupProfile.fullName
+            is Contact -> profile.fullName
+            is Invitation -> profile.fullName
+        }
+
+    val shortDescription: String?
+        get() {
+            val s = when (this) {
+                is Group -> groupProfile.shortDescr
+                is Contact -> profile.shortDescr
+                is Invitation -> profile.shortDescr
+            }
+            return s?.trim()?.ifEmpty { null }
+        }
+
+    val iconRes: ImageResource  // for ProfileImage icon parameter
+        get() = when (this) {
+            is Group -> when (groupProfile.publicGroup?.groupType) {
+                GroupType.Channel -> MR.images.ic_bigtop_updates_padded
+                else -> MR.images.ic_supervised_user_circle_filled
+            }
+            is Contact -> if (business) MR.images.ic_work_filled_padded else MR.images.ic_account_circle_filled
+            is Invitation -> MR.images.ic_account_circle_filled
+        }
+
+    val smallIconRes: ImageResource  // for inline icon in context/quote views
+        get() = when (this) {
+            is Group -> when (groupProfile.publicGroup?.groupType) {
+                GroupType.Channel -> MR.images.ic_bigtop_updates
+                else -> MR.images.ic_group
+            }
+            is Contact -> if (business) MR.images.ic_work else MR.images.ic_person
+            is Invitation -> MR.images.ic_person
+        }
+
+    fun infoLine(signed: Boolean): String {
+        var s = when (this) {
+            is Group -> when (groupProfile.publicGroup?.groupType) {
+                GroupType.Channel -> generalGetString(MR.strings.channel_link)
+                else -> generalGetString(MR.strings.group_link)
+            }
+            is Contact -> if (business) generalGetString(MR.strings.business_address) else generalGetString(MR.strings.contact_address)
+            is Invitation -> generalGetString(MR.strings.one_time_link)
+        }
+        if (signed) {
+            s += " " + if (isPublicGroup) generalGetString(MR.strings.from_owner) else generalGetString(MR.strings.signed_parentheses)
+        }
+        return s
+    }
+}
+```
+
+Icons resolved — see "Resolved decisions" section 1.
+
+### 1.6 Add `OwnerVerification` type (near ConnectionPlan, line ~6844 of SimpleXAPI.kt)
+
+```kotlin
+@Serializable
+sealed class OwnerVerification {
+    @Serializable @SerialName("verified") object Verified : OwnerVerification()
+    @Serializable @SerialName("failed") class Failed(val reason: String) : OwnerVerification()
+}
+```
+
+### 1.7 Update plan types with `ownerVerification` (SimpleXAPI.kt lines 6852-6877)
+
+- `InvitationLinkPlan.Ok`: add `val ownerVerification: OwnerVerification? = null`
+- `ContactAddressPlan.Ok`: add `val ownerVerification: OwnerVerification? = null`
+- `GroupLinkPlan.Ok`: add `val ownerVerification: OwnerVerification? = null`
+
+---
+
+## 2. API commands — `SimpleXAPI.kt`
+
+### 2.1 Add `ApiShareChatMsgContent` command class (near line 3626)
+
+```kotlin
+class ApiShareChatMsgContent(
+    val shareChatType: ChatType, val shareChatId: Long,
+    val toChatType: ChatType, val toChatId: Long,
+    val toScope: GroupChatScope?, val sendAsGroup: Boolean
+): CC()
+```
+
+Add `cmdString`:
+```kotlin
+is ApiShareChatMsgContent -> {
+    val asGroup = if (sendAsGroup) "(as_group=on)" else ""
+    "/_share chat content ${chatRef(shareChatType, shareChatId)} ${chatRef(toChatType, toChatId, toScope)}$asGroup"
+}
+```
+
+### 2.2 Add `CR.ChatMsgContent` response (near line 6320)
+
+```kotlin
+@Serializable @SerialName("chatMsgContent")
+class ChatMsgContent(val user: UserRef, val msgContent: MsgContent): CR()
+```
+
+### 2.3 Add `apiShareChatMsgContent` wrapper function (near line 1133)
+
+```kotlin
+suspend fun apiShareChatMsgContent(
+    rh: Long?, shareChatType: ChatType, shareChatId: Long,
+    toChatType: ChatType, toChatId: Long,
+    toScope: GroupChatScope?, sendAsGroup: Boolean
+): MsgContent? {
+    val r = sendCmd(rh, CC.ApiShareChatMsgContent(shareChatType, shareChatId, toChatType, toChatId, toScope, sendAsGroup))
+    if (r is CR.ChatMsgContent) return r.msgContent
+    apiErrorAlert("apiShareChatMsgContent", r)
+    return null
+}
+```
+
+### 2.4 Update `apiConnectPlan` (line 1488)
+
+Add `linkOwnerSig: LinkOwnerSig? = null` parameter. Update the `CC.APIConnectPlan` class to include it. Update cmdString to append `sig=<json>` when present.
+
+---
+
+## 3. Compose state — `ComposeView.kt` + `Enums.kt`
+
+### 3.1 Add `SharedContent.ChatLink` to `Enums.kt` (line 13-18)
+
+```kotlin
+data class ChatLink(val groupInfo: GroupInfo): SharedContent()
+```
+
+This triggers the share flow: sets `chatModel.sharedContent.value = SharedContent.ChatLink(groupInfo)` → navigates to chat list → user picks destination.
+
+### 3.2 Add `ChatLinkPreview` to `ComposePreview` (`ComposeView.kt` line 57-63)
+
+```kotlin
+@Serializable class ChatLinkPreview(val chatLink: MsgChatLink, val ownerSig: LinkOwnerSig?): ComposePreview()
+```
+
+### 3.3 Update `ComposeState` (`ComposeView.kt` line 103-240)
+
+- `sendEnabled`: add `is ComposePreview.ChatLinkPreview -> true` case
+- `linkPreviewAllowed`: add `is ComposePreview.ChatLinkPreview -> false`
+- `attachmentPreview`: add `is ComposePreview.ChatLinkPreview -> false`
+
+### 3.4 Add compose preview rendering
+
+In the compose area where previews are rendered, add a case for `ChatLinkPreview` that shows `ComposeChatLinkView` (new composable).
+
+### 3.5 Add send handling
+
+In the send function, add case for `ChatLinkPreview`:
+```kotlin
+is ComposePreview.ChatLinkPreview -> {
+    val linkStr = preview.chatLink.connLinkStr
+    val text = if (msgText.isEmpty()) linkStr else "$msgText\n$linkStr"
+    send(MsgContent.MCChat(text, preview.chatLink, preview.ownerSig), ...)
+}
+```
+
+### 3.6 Handle `SharedContent.ChatLink` in `ComposeView.kt` (line 1431-1446, `LaunchedEffect(chatModel.sharedContent.value)`)
+
+When the destination chat opens with `SharedContent.ChatLink`, the `LaunchedEffect` fires. At this point:
+- `chatModel.chatId.value` = destination chat ID
+- `shared.groupInfo` = source group (what we're sharing)
+- The current chat's `ChatInfo` provides destination type/id/scope for the API call
+
+```kotlin
+is SharedContent.ChatLink -> {
+    // chat variable is available in ComposeView scope — it's the destination chat
+    val cInfo = chat.chatInfo
+    val sendAsGroup = cInfo.groupInfo?.let { it.useRelays && it.membership.memberRole >= GroupMemberRole.Owner } ?: false
+    withBGApi {
+        val mc = chatModel.controller.apiShareChatMsgContent(
+            chat.remoteHostId, ChatType.Group, shared.groupInfo.groupId,
+            cInfo.chatType, cInfo.apiId,
+            cInfo.groupChatScope(), sendAsGroup
+        )
+        if (mc is MsgContent.MCChat) {
+            composeState.value = composeState.value.copy(
+                preview = ComposePreview.ChatLinkPreview(mc.chatLink, mc.ownerSig)
+            )
+        } else if (mc != null) {
+            AlertManager.shared.showAlertMsg(
+                generalGetString(MR.strings.error_sharing_channel),
+                mc.toString()
+            )
+        }
+    }
+}
+```
+
+Note: `chat` is available as a parameter in the ComposeView composable scope. `withBGApi` is needed because `apiShareChatMsgContent` is a suspend function and `LaunchedEffect` already runs in a coroutine but the API call should use the standard error handling pattern.
+
+### 3.7 Handle `SharedContent.ChatLink` in `ShareListView.kt` (line 33-54)
+
+Add filtering case in the `when (sharedContent)` block:
+```kotlin
+is SharedContent.ChatLink -> {
+    hasSimplexLink = true  // chat cards ARE simplex links, prohibited by SimplexLinks group pref
+}
+```
+
+This means in `ShareListNavLinkView` (line 44): `simplexLinkProhibited = hasSimplexLink && !chat.groupFeatureEnabled(GroupFeature.SimplexLinks)` — groups where simplex links are disabled will show as prohibited (disabled row + alert on tap). Direct chats and local notes are unaffected (line 30-31 don't check simplex links for direct).
+
+### 3.8 Handle `SharedContent.ChatLink` in `ShareListNavLinkView.kt` (line 28-67)
+
+The existing `when (chat.chatInfo)` dispatch handles click actions per chat type. For `SharedContent.ChatLink`, the click action (line 37 `directChatAction`, line 54 `groupChatAction`) opens the destination chat. `ComposeView`'s `LaunchedEffect` (§3.6) then picks up the `SharedContent.ChatLink` and sets up the compose preview.
+
+No changes needed to `ShareListNavLinkView` click handlers — they already open the correct chat. The `SharedContent.ChatLink` is consumed by `ComposeView`.
+
+### 3.9 Handle `SharedContent.ChatLink` in `ShareListToolbar` (line 142-147)
+
+Add title for the share list toolbar:
+```kotlin
+is SharedContent.ChatLink -> stringResource(MR.strings.share_channel)
+```
+
+### 3.10 Handle back navigation from share list with `SharedContent.ChatLink` (line 126-133)
+
+When user taps back on the share list with `SharedContent.ChatLink`, should navigate back to the source chat (like Forward navigates back to `fromChatInfo.id`):
+```kotlin
+if (sharedContent is SharedContent.ChatLink) {
+    chatModel.chatId.value = sharedContent.groupInfo.id
+}
+```
+
+---
+
+## 4. New composables
+
+### 4.1 `ComposeChatLinkView.kt` (new file)
+
+Near `ComposeView.kt`. Shows ProfileImage + displayName + optional shortDescription. Cancel button. Mirrors iOS `ComposeChatLinkView`.
+
+### 4.2 `CIChatLinkHeader.kt` (new file)
+
+Near `FramedItemView.kt`. Shows profile header (image + name + fullName), shortDescription, info line, "Tap to open" + meta. Mirrors iOS `CIChatLinkHeader`.
+
+---
+
+## 5. Message rendering — `FramedItemView.kt`
+
+### 5.1 Add `MCChat` case in content dispatch (line ~296-341)
+
+After the `MCLink` case:
+```kotlin
+is MsgContent.MCChat -> {
+    val hasText = mc.text != mc.chatLink.connLinkStr
+    CIChatLinkHeader(chatItem = ci, chatLink = mc.chatLink, ownerSig = mc.ownerSig, hasText = hasText)
+    // tap gesture → planAndConnect(mc.chatLink.connLinkStr, linkOwnerSig = mc.ownerSig)
+    if (hasText) {
+        CIMarkdownText(..., stripLink = mc.chatLink.connLinkStr)
+    }
+}
+```
+
+### 5.2 Add `MCChat` case in quote dispatch (line ~142-183)
+
+```kotlin
+is MsgContent.MCChat -> {
+    val prefix = buildAnnotatedString {
+        append(mc.chatLink.displayName)
+        append(if (mc.text != mc.chatLink.connLinkStr) " - " else "")
+    }
+    CIQuotedMsgView(qi, stripLink = mc.chatLink.connLinkStr, prefix = prefix)
+    // + small icon
+}
+```
+
+### 5.3 Add `stripLink` parameter to text rendering
+
+`CIMarkdownText` / `MarkdownText` (TextItemView.kt) needs `stripLink: String? = null` parameter. Inside, strip the text and formattedText before rendering.
+
+Add `stripTextLink` and `stripFormattedTextLink` functions near `MarkdownText`:
+
+```kotlin
+fun stripTextLink(text: String, link: String): String =
+    if (text == link) ""
+    else if (text.endsWith("\n$link")) text.dropLast(link.length + 1)
+    else text
+
+fun stripFormattedTextLink(ft: List<FormattedText>?, link: String): List<FormattedText>? {
+    if (ft == null || ft.isEmpty() || ft.last().text != link) return ft
+    val result = ft.toMutableList()
+    result.removeLast()
+    val i = result.lastIndex
+    if (i >= 0 && result[i].format == null && result[i].text.endsWith("\n")) {
+        result[i] = result[i].copy(text = result[i].text.dropLast(1))
+        if (result[i].text.isEmpty()) result.removeLast()
+    }
+    return result.ifEmpty { null }
+}
+```
+
+---
+
+## 6. Chat list preview — `ChatPreviewView.kt`
+
+### 6.1 Add content preview for `MCChat` (line ~293-337)
+
+```kotlin
+is MsgContent.MCChat -> {
+    SmallContentPreview(borderColor = if (mc.chatLink.image != null) ...) {
+        ProfileImage(mc.chatLink.image, mc.chatLink.iconName, size)
+        // onClick → planAndConnect
+    }
+}
+```
+
+### 6.2 Update text preview (line ~217-290)
+
+For `MCChat`, show `displayName + description` instead of raw text:
+```kotlin
+is MsgContent.MCChat -> {
+    val descr = mc.chatLink.shortDescription?.let { "\n$it" } ?: ""
+    itemText = mc.chatLink.displayName + descr
+    formattedText = null
+}
+```
+
+---
+
+## 7. Context/forwarding view — `ContextItemView.kt`
+
+### 7.1 Add `MCChat` attachment icon (line 75-84, `fun attachment()`)
+
+```kotlin
+is MsgContent.MCChat -> mc.chatLink.smallIconRes
+```
+
+This returns the small icon (e.g., `MR.images.ic_bigtop_updates` for channels). The icon is rendered inline via the existing `inlineContent` mechanism in `MessageText` (line 42-58).
+
+### 7.2 Add `MCChat` case in `ContextMsgPreview` or `MessageText` (line 87-89)
+
+For MCChat, `MessageText` needs:
+1. The attachment icon (from §7.1) — rendered inline by existing mechanism
+2. `prefix` with `chatLink.displayName + " - "` (or just displayName if no text) — `MarkdownText` already has `prefix: AnnotatedString?`
+3. `stripLink = chatLink.connLinkStr` — strips the link from text
+
+Modify `ContextMsgPreview` (line 87-89) or add a special case:
+```kotlin
+fun ContextMsgPreview(contextItem: ChatItem, lines: Int) {
+    val mc = contextItem.content.msgContent
+    if (mc is MsgContent.MCChat) {
+        val hasText = contextItem.text != mc.chatLink.connLinkStr
+        val prefix = buildAnnotatedString { append(mc.chatLink.displayName + if (hasText) " - " else "") }
+        MessageText(contextItem, mc.chatLink.smallIconRes, lines, prefix = prefix, stripLink = mc.chatLink.connLinkStr)
+    } else {
+        MessageText(contextItem, remember(contextItem.id) { attachment(contextItem) }, lines)
+    }
+}
+```
+
+This requires `MessageText` to accept optional `prefix` and `stripLink` parameters and pass them to `MarkdownText`.
+
+---
+
+## 8. Group link / info views
+
+### 8.1 `GroupLinkView.kt` (line ~27)
+
+Add parameter: `groupInfo: GroupInfo? = null`.
+Add "Share via chat" button when `groupInfo?.groupProfile?.publicGroup != null`.
+Button action: `chatModel.sharedContent.value = SharedContent.ChatLink(groupInfo)` + close modals + navigate to chat list.
+
+### 8.2 `GroupChatInfoView.kt`
+
+Add "Share via chat" button in the channel link section (next to existing "Share link" button).
+Button action: same as 8.1 — sets `SharedContent.ChatLink` and navigates.
+
+No `composeState` parameter needed (unlike iOS) — the `SharedContent` pattern handles state transfer without bindings.
+
+### 8.3 Channel creation (equivalent of `AddChannelView`)
+
+Find the Kotlin channel creation flow and pass `groupInfo` to `GroupLinkView` so "Share via chat" is available during creation.
+
+### 8.4 Share flow summary (no separate `shareChatLink` function needed)
+
+Unlike iOS which has a separate `shareChatLink` free function (due to sheet-based navigation), Kotlin's flow is:
+
+1. User taps "Share via chat" → `chatModel.sharedContent.value = SharedContent.ChatLink(groupInfo)` + `chatModel.chatId.value = null` (navigates to chat list showing `ShareListView`)
+2. `ShareListView` shows filtered chats with `hasSimplexLink = true` prohibition
+3. User picks destination → `directChatAction`/`groupChatAction` opens the chat
+4. `ComposeView`'s `LaunchedEffect` fires (§3.6) → calls `apiShareChatMsgContent` → sets `ComposePreview.ChatLinkPreview`
+5. User types optional text, taps Send
+6. Send dispatch (§3.5) constructs `MCChat(text + link, chatLink, ownerSig)` and sends
+
+The API call happens in `ComposeView`'s `LaunchedEffect`, not in a separate function. Error handling: if the API fails, show alert and clear `sharedContent`.
+
+For the **channel creation flow** (no chat open yet): when `SharedContent.ChatLink` is consumed in `ComposeView` and the API call succeeds, the preview is set directly. No draft fallback needed — the chat IS already open at that point (the user picked it from the share list).
+
+---
+
+## 9. Connect flow
+
+### 9.1 Update `planAndConnect` equivalent
+
+Add `linkOwnerSig: LinkOwnerSig? = null` parameter. Pass to `apiConnectPlan`. Thread `ownerVerification` from plan result to connect alerts.
+
+### 9.2 Add `ownerVerificationMessage` function
+
+```kotlin
+fun ownerVerificationMessage(ov: OwnerVerification?): String? = when (ov) {
+    is OwnerVerification.Verified -> generalGetString(MR.strings.link_signature_verified)
+    is OwnerVerification.Failed -> "⚠️ " + String.format(generalGetString(MR.strings.signature_verification_failed), ov.reason)
+    null -> null
+}
+```
+
+### 9.3 Update connect alerts
+
+Add `information: String? = null` parameter to `AlertManager.showOpenChatAlert` (`AlertManager.kt` line 271). Render as a separate `Text` below subtitle with `MaterialTheme.colors.onSurface` color (not secondary — more prominent).
+
+Update `showPrepareContactAlert` (ConnectPlan.kt line 572) and `showPrepareGroupAlert` (line 612) to accept and pass `ownerVerification`. Thread from `planAndConnectTask` `.Ok` cases.
+
+---
+
+## 10. String resources
+
+Add to `strings.xml` (all platforms). No collisions found with existing keys:
+- `chat_link_channel` = "Channel link"
+- `chat_link_group` = "Group link"
+- `chat_link_business_address` = "Business address"
+- `chat_link_contact_address` = "Contact address"
+- `chat_link_one_time` = "One-time link"
+- `chat_link_from_owner` = "(from owner)"
+- `chat_link_signed` = "(signed)"
+- `owner_verification_passed` = "Link signature verified."
+- `owner_verification_failed` = "⚠️ Signature verification failed: %s."
+- `error_sharing_channel` = "Error sharing channel"
+- `share_via_chat` = "Share via chat"
+- `share_channel` = "Share channel"
+- `tap_to_open` = "Tap to open"
+
+---
+
+## Resolved decisions (from investigation)
+
+### 1. Icon resource names (verified from `ChatModel.kt` and MR/images/)
+- **Channel**: `MR.images.ic_bigtop_updates_padded` (used in `GroupInfo.chatIconName` when `useRelays`)
+- **Group**: `MR.images.ic_supervised_user_circle_filled` (used in `GroupInfo.chatIconName` default)
+- **Business**: `MR.images.ic_work_filled_padded` (used in `GroupInfo.chatIconName` business case)
+- **Contact**: `MR.images.ic_account_circle_filled` (used in `Contact.chatIconName`)
+- **Small (inline text) icons**: `MR.images.ic_bigtop_updates` (channel), `MR.images.ic_group` (group), `MR.images.ic_work` (business), `MR.images.ic_person` (contact/invitation)
+
+### 2. MsgChatLink JSON serialization
+Existing `@Serializable` sealed class with `@SerialName` annotations already produces `{"type": "group", ...}` format. No custom serializer needed (confirmed by user). Keep existing pattern.
+
+### 3. Forwarding/sharing picker pattern
+Kotlin uses `SharedContent` + navigate to chat list, NOT a sheet picker:
+- Forward: sets `chatModel.sharedContent.value = SharedContent.Forward(items, fromInfo)` + `chatModel.chatId.value = null` (returns to chat list)
+- Share: add `SharedContent.ChatLink(groupInfo: GroupInfo)` case → sets `sharedContent` → user picks chat from `ShareListView` → opens chat with `ChatLinkPreview` in compose
+
+`ShareListView.kt` (line 44) dispatches on `SharedContent` type for filtering. Add `SharedContent.ChatLink` case there with `hasSimplexLink = true` filtering.
+
+### 4. Navigation after share
+- `ModalManager.closeAllModalsEverywhere()` dismisses all modals
+- Setting `chatModel.chatId.value = chatId` navigates to a chat
+- For the share flow: `shareChatLink` calls API → on success → `ModalManager.closeAllModalsEverywhere()` → sets `composeState` preview → sets `chatModel.chatId.value = destChat.id`
+
+### 5. Draft mechanism (verified at `ChatModel.kt:203-204`)
+Same as iOS: `chatModel.draft: MutableState<ComposeState?>` and `chatModel.draftChatId: MutableState<String?>`. Used in `ComposeView.kt:435-444` for save/restore. Same fallback pattern as iOS for the channel creation flow.
+
+### 6. `planAndConnect` (verified at `ConnectPlan.kt:24-48`)
+Single function `suspend fun planAndConnect(rhId, shortOrFullLink, close, cleanup, filterKnownContact, filterKnownGroup)` in `ConnectPlan.kt`. Add `linkOwnerSig: LinkOwnerSig? = null` parameter. Thread to `apiConnectPlan`. Thread `ownerVerification` to alert functions.
+
+Alert functions: `showPrepareContactAlert` (line 572) and `showPrepareGroupAlert` (line 612) use `AlertManager.privacySensitive.showOpenChatAlert(...)` which has `subtitle: String?`. Add `information: String? = null` parameter.
+
+### 7. Forwarding view parameterization
+No `ChatItemForwardingView` to parameterize — Kotlin uses `ShareListView` which dispatches on `SharedContent` type. Add a new `SharedContent.ChatLink` case. `ShareListView` filters chats and shows the list. When user picks a chat, `ComposeView` reads `sharedContent` and sets compose state accordingly (line 1439: `is SharedContent.Forward -> composeState.value = ...`). Add handling for `SharedContent.ChatLink`.
+
+### 8. String resource naming
+Need to check existing strings to avoid collisions. Use `chat_link_channel`, `chat_link_group`, etc. prefix pattern to avoid collision with existing `group_link` string.