feat: added list overview and detail view

MindDump/ViewModels/ListStore.swift

@@ -0,0 +1,44 @@
+import Foundation
+import Observation
+
+@Observable
+class ListStore {
+    var lists: [TodoList]
+
+    init() {
+        self.lists = [TodoList(name: "Inbox", isInbox: true)]
+    }
+
+    func addList(name: String) {
+        let list = TodoList(name: name)
+        lists.append(list)
+    }
+
+    func deleteList(_ list: TodoList) {
+        guard !list.isInbox else { return }
+        lists.removeAll { $0.id == list.id }
+    }
+
+    func addItem(to listID: UUID, title: String) {
+        guard let index = lists.firstIndex(where: { $0.id == listID }) else { return }
+        let item = TodoItem(title: title)
+        lists[index].items.append(item)
+    }
+
+    func deleteItem(_ itemID: UUID, from listID: UUID) {
+        guard let listIndex = lists.firstIndex(where: { $0.id == listID }) else { return }
+        lists[listIndex].items.removeAll { $0.id == itemID }
+    }
+
+    func updateItem(_ itemID: UUID, in listID: UUID, title: String) {
+        guard let listIndex = lists.firstIndex(where: { $0.id == listID }),
+              let itemIndex = lists[listIndex].items.firstIndex(where: { $0.id == itemID }) else { return }
+        lists[listIndex].items[itemIndex].title = title
+    }
+
+    func toggleItemCompleted(_ itemID: UUID, in listID: UUID) {
+        guard let listIndex = lists.firstIndex(where: { $0.id == listID }),
+              let itemIndex = lists[listIndex].items.firstIndex(where: { $0.id == itemID }) else { return }
+        lists[listIndex].items[itemIndex].isCompleted.toggle()
+    }
+}