feat: add move-to-list functionality and stats dashboard cards to lists overview

MindDump/ViewModels/ListStore.swift

@@ -12,6 +12,26 @@ class ListStore {
         lists.first { $0.isInbox }!.id
     }
 
+    var allOpenItems: [TodoItem] {
+        lists.flatMap { $0.items }.filter { !$0.isCompleted }
+    }
+
+    var openCount: Int { allOpenItems.count }
+
+    var urgentCount: Int {
+        let threeDaysFromNow = Calendar.current.date(byAdding: .day, value: 3, to: Date())!
+        return allOpenItems.filter { item in
+            item.priority == .high || (item.deadline != nil && item.deadline! <= threeDaysFromNow)
+        }.count
+    }
+
+    var dueCount: Int {
+        let startOfTomorrow = Calendar.current.startOfDay(for: Calendar.current.date(byAdding: .day, value: 1, to: Date())!)
+        return allOpenItems.filter { item in
+            item.deadline != nil && item.deadline! < startOfTomorrow
+        }.count
+    }
+
     init(modelContext: ModelContext) {
         self.modelContext = modelContext
         ensureInbox()
@@ -86,7 +106,17 @@ class ListStore {
         fetchLists()
     }
 
-    // MARK: - Private
+    func moveItem(_ itemID: UUID, from sourceListID: UUID, to targetListID: UUID) {
+        guard sourceListID != targetListID,
+              let sourceList = lists.first(where: { $0.id == sourceListID }),
+              let targetList = lists.first(where: { $0.id == targetListID }),
+              let item = sourceList.items.first(where: { $0.id == itemID }) else { return }
+        sourceList.items.removeAll { $0.id == itemID }
+        targetList.items.append(item)
+        item.modifiedAt = Date()
+        save()
+        fetchLists()
+    }
 
     private func ensureInbox() {
         let descriptor = FetchDescriptor<TodoList>(predicate: #Predicate { $0.isInbox })