src/models/Settings.js

const mongoose = require('mongoose');

const settingsSchema = new mongoose.Schema({
    key: { type: String, required: true, unique: true }, // e.g., 'store_location'
    value: { type: mongoose.Schema.Types.Mixed, required: true }, // e.g., { latitude: 123, longitude: 456, text: "Address..." }
    updatedAt: { type: Date, default: Date.now }
});

module.exports = mongoose.model('Settings', settingsSchema);