Sign the macOS app and keep its state in SwiftData with iCloud sync

mac/Sources/Byre/Store.swift

@@ -1,11 +1,11 @@
 import Foundation
 import Observation
+import SwiftData
 
 let taskTabs: [TaskTab] = [.transcript, .changes, .files, .terminal, .inbox, .reviews, .workflow, .project]
 
 private let historyPage = 1000
 private let leadPage = 50
-private let visitsKey = "byre.visits"
 
 struct TaskState {
     enum Kind {
@@ -360,16 +360,26 @@ final class Store {
     }
 
     func lastVisits() -> [String: Double] {
-        UserDefaults.standard.dictionary(forKey: visitsKey) as? [String: Double] ?? [:]
+        fetchRecords(FetchDescriptor<VisitRecord>()).reduce(into: [:]) { visits, v in
+            visits[v.taskId] = max(visits[v.taskId] ?? 0, v.at)
+        }
     }
 
     private func markVisited(_ taskId: String?) {
         guard let taskId else {
             return
         }
-        var visits = lastVisits()
-        visits[taskId] = Date().timeIntervalSince1970 * 1000
-        UserDefaults.standard.set(visits, forKey: visitsKey)
+        let at = Date().timeIntervalSince1970 * 1000
+        let records = fetchRecords(FetchDescriptor<VisitRecord>(predicate: #Predicate { $0.taskId == taskId }))
+        if records.isEmpty {
+            persistence.insert(VisitRecord(taskId: taskId, at: at))
+        } else {
+            records[0].at = at
+            for record in records.dropFirst() {
+                persistence.delete(record)
+            }
+        }
+        saveRecords()
     }
 
     func loadSummaryReads() async throws {