ui: include unread support chats in the chat list unread filter

A group where a member is waiting in a support chat has something to read - the
chat list row already flags it - but the unread filter did not list it, so a
moderator filtering for unread silently skipped the member waiting on them.
chatStats.unreadCount is filled by a query scoped to the main conversation
(group_scope_tag IS NULL), so unreadTag cannot see support scopes at all.

Match on Chat.hasUnread, which adds supportUnreadCount to unreadTag, gated on
the chat not being muted to "mute all" - so a support chat waiting in a fully
muted group does not put it in the filter, matching what the profile's unread
count does with that group. Marking such a chat unread by hand still lists it,
through unreadTag's unreadChat branch.

Two consequences of taking supportUnreadCount whole are deliberate. For a
moderator it is membersRequireAttention, which counts members pending approval
as well as unread messages, and only approving or rejecting clears those - so
the group stays listed until the moderator acts. And mentions-only chats still
count support unread, on the view that mentions-only is a statement about group
chatter and the user's own line to the admins is not chatter.

apps/ios/Shared/Model/ChatModel.swift

@@ -1412,6 +1412,8 @@ final class Chat: ObservableObject, Identifiable, ChatLike {
         }
     }
 
+    var hasUnread: Bool { unreadTag || (chatInfo.chatSettings?.enableNtfs != MsgFilter.none && supportUnreadCount > 0) }
+
     public static var sampleData: Chat = Chat(chatInfo: ChatInfo.sampleData.direct, chatItems: [])
 }
 

apps/ios/Shared/Views/ChatList/ChatListView.swift

@@ -552,7 +552,7 @@ struct ChatListView: View {
             switch chatTagsModel.activeFilter {
             case let .presetTag(tag): presetTagMatchesChat(tag, chat.chatInfo, chat.chatStats)
             case let .userTag(tag): chat.chatInfo.chatTags?.contains(tag.chatTagId) == true
-            case .unread: chat.unreadTag
+            case .unread: chat.hasUnread
             case .none: true
             }
         }

apps/ios/product/views/chat-list.md

@@ -41,7 +41,7 @@ Managed by `ChatTagsModel` and `TagListView`:
 | Filter | PresetTag | Description |
 |---|---|---|
 | All | (none) | No filter, shows all chats |
-| Unread | `.unread` | Chats with unread messages |
+| Unread | `.unread` | Chats with unread messages, or unread support chats unless muted to "mute all" |
 | Favorites | `.favorites` | User-favorited chats |
 | Groups | `.groups` | Group conversations only |
 | Contacts | `.contacts` | Direct contacts only |

apps/ios/spec/client/chat-list.md

@@ -163,7 +163,7 @@ Horizontal scrolling tab bar below the navigation bar. Tabs:
 | Tab | Filter | Shows |
 |-----|--------|-------|
 | All | `nil` | All conversations |
-| Unread | `.unread` | Conversations with unread messages |
+| Unread | `.unread` | Conversations with unread messages, or unread support chats unless muted to "mute all" |
 | Favorites | `.presetTag(.favorites)` | Favorited conversations |
 | Groups | `.presetTag(.groups)` | Group conversations |
 | Contacts | `.presetTag(.contacts)` | Direct conversations |

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

@@ -1456,6 +1456,8 @@ data class Chat(
     else -> 0
   }
 
+  val hasUnread: Boolean get() = unreadTag || (chatInfo.chatSettings?.enableNtfs != None && supportUnreadCount > 0)
+
   fun groupFeatureEnabled(feature: GroupFeature): Boolean =
     if (chatInfo is ChatInfo.Group) {
       chatInfo.groupInfo.groupFeatureEnabled(feature)

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

@@ -1476,7 +1476,7 @@ private fun filtered(chat: Chat, activeFilter: ActiveFilter?): Boolean =
   when (activeFilter) {
     is ActiveFilter.PresetTag -> presetTagMatchesChat(activeFilter.tag, chat.chatInfo, chat.chatStats)
     is ActiveFilter.UserTag -> chat.chatInfo.chatTags?.contains(activeFilter.tag.chatTagId) ?: false
-    is ActiveFilter.Unread -> chat.unreadTag
+    is ActiveFilter.Unread -> chat.hasUnread
     else -> true
   }
 

apps/multiplatform/product/views/chat-list.md

@@ -65,7 +65,7 @@ Managed by `chatModel.userTags`, `chatModel.presetTags`, and `chatModel.activeCh
 | Business | `BUSINESS` | Work | Business chat conversations |
 | Notes | `NOTES` | Folder | Notes to self |
 | Custom tags | `UserTag(ChatTag)` | Label/emoji | User-created tags with custom emoji and name |
-| Unread | `ActiveFilter.Unread` | Filter list icon | Chats with unread messages (toggle via filter button) |
+| Unread | `ActiveFilter.Unread` | Filter list icon | Chats with unread messages, or unread support chats unless muted to "mute all" (toggle via filter button) |
 
 Display logic:
 - When collapsible preset tags exceed 3 total (with user tags), they collapse into a `CollapsedTagsFilterView` dropdown menu

apps/multiplatform/spec/client/chat-list.md

@@ -143,7 +143,7 @@ The `filteredChats` function (line ~1188) applies filters in this order:
 3. **Active filter:**
    - `PresetTag`: Matches chat type and characteristics (e.g., `CONTACTS` filters `ChatInfo.Direct`, `GROUPS` filters `ChatInfo.Group`).
    - `UserTag`: Matches chats whose `chatTags` contain the tag ID.
-   - `Unread`: Matches chats with `unreadCount > 0` or `unreadChat == true`.
+   - `Unread`: Matches `Chat.hasUnread` — a chat marked unread by hand, unread messages as the chat's notification setting counts them, or unread support chats unless the chat is muted to "mute all".
 
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