osx: mark as read when hovering over window

osx/kordophone2/ConversationView.swift

@@ -23,5 +23,10 @@ struct ConversationView: View
             entryModel.handleDroppedProviders(providers)
             return true
         }
+
+        .onHover { isHovering in
+            guard isHovering else { return } 
+            transcriptModel.setNeedsMarkAsRead()
+        }
     }
 }

osx/kordophone2/Transcript/TranscriptView.swift

@@ -131,6 +131,9 @@ struct TranscriptView: View
         internal var messages: [Display.Message]
         internal let client = XPCClient()
 
+        private var needsMarkAsRead: Bool = false
+        private var lastMarkAsRead: Date = .now
+
         init(messages: [Display.Message] = []) {
             self.messages = messages
             rebuildDisplayItems()
@@ -148,6 +151,19 @@ struct TranscriptView: View
             }
         }
 
+        func setNeedsMarkAsRead() {
+            guard needsMarkAsRead == false else { return }
+            guard Date.now.timeIntervalSince(lastMarkAsRead) > 5.0 else { return }
+
+            needsMarkAsRead = true
+            Task { @MainActor [weak self] in
+                guard let self else { return }
+                await markAsRead()
+                needsMarkAsRead = false
+                lastMarkAsRead = .now
+            }
+        }
+
         func attachmentDownloaded(id: String) {
             // TODO: should be smarter here
             setNeedsReload(animated: false)