// KeyboardReturnMod.swift

import SwiftUI

struct KeyboardReturnMod: ViewModifier {
    let returnAction: () -> ()

    func body(content: Content) -> some View {
        content
            .toolbar {
                ToolbarItemGroup(placement: .keyboard) {
                    Button {
                        returnAction()
                    } label: {
                        Image(systemName: "keyboard.chevron.compact.down")
                        Text("Return")
                    }
                }
            }
    }
}

// SettingsTab.swift

enum STField {
    case dailyGoal
}

struct SettingsTab: View {
    // ...

    @FocusState var focusedField: STField?

    var body: some View {
        // ...

        NavigationStack {
            Form {
                // ...

                Section("Options") {
                    // ...

                    HStack {
                        Text("Daily goal (Intake)")
                        Spacer()
                        TextField(mainVM.selectedSystem.volume.n, value: $mainVM.dailyGoal, format: .number)
                            .keyboardType(.decimalPad)
                            .focused($focusedField, equals: .dailyGoal)
                            .foregroundStyle(Color(.secondaryLabel))
                            .multilineTextAlignment(.trailing)
                            .frame(width: 75)
                    }
                }
            }
            .modifier(KeyboardReturnMod(returnAction: { focusedField = nil }))

            // ...
        }
    }
}