feat: replace new-list alert with inline TextField

MindDump/Views/ListsOverviewView.swift

@@ -2,8 +2,8 @@ import SwiftUI
 
 struct ListsOverviewView: View {
     @Environment(ListStore.self) private var store
-    @State private var showingAddList = false
     @State private var newListName = ""
+    @FocusState private var isFieldFocused: Bool
 
     var body: some View {
         List {
@@ -20,25 +20,24 @@ struct ListsOverviewView: View {
             }
             .onDelete(perform: deleteLists)
 
-            Button(action: { showingAddList = true }) {
-                Label("Neue Liste", systemImage: "plus")
+            HStack {
+                Image(systemName: "plus")
                     .foregroundStyle(.blue)
+                TextField("Neue Liste", text: $newListName)
+                    .focused($isFieldFocused)
+                    .onSubmit(commitNewList)
             }
         }
         .navigationTitle("MindDump")
-        .alert("Neue Liste", isPresented: $showingAddList) {
-            TextField("Name", text: $newListName)
-            Button("Abbrechen", role: .cancel) {
-                newListName = ""
-            }
-            Button("Erstellen") {
-                let name = newListName.trimmingCharacters(in: .whitespaces)
-                if !name.isEmpty {
-                    store.addList(name: name)
-                }
-                newListName = ""
-            }
+        .onAppear { isFieldFocused = false }
+    }
+
+    private func commitNewList() {
+        let name = newListName.trimmingCharacters(in: .whitespaces)
+        if !name.isEmpty {
+            store.addList(name: name)
         }
+        newListName = ""
     }
 
     private func deleteLists(at offsets: IndexSet) {