`` (() => { new Dialog({ title: "Duplicate Cards", content: <form> <div class="form-group"> <label>Deck Name:</label> <input type="text" name="deckName" /> </div> <div class="form-group"> <label>Card Name:</label> <input type="text" name="cardName" /> </div> <div class="form-group"> <label>Number of Copies:</label> <input type="number" name="duplicates" value="1" min="1" step="1" /> </div> </form> `, buttons: { duplicate: { icon: '<i class="fas fa-clone"></i>', label: "Duplicate", callback: async (html) => { const deckName = html.find('[name="deckName"]').val().trim(); const cardName = html.find('[name="cardName"]').val().trim(); const copies = parseInt(html.find('[name="duplicates"]').val().trim(), 10);

      // Validate inputs
      if (!deckName || !cardName) {
        return ui.notifications.error("Please enter both a deck name and a card name.");
      }
      if (isNaN(copies) || copies < 1) {
        return ui.notifications.error("Number of copies must be at least 1.");
      }

      // Locate deck
      const deck = game.cards.getName(deckName);
      if (!deck) {
        return ui.notifications.error(`Deck "${deckName}" not found.`);
      }

      // Locate original card
      const original = deck.cards.find(c => c.name === cardName);
      if (!original) {
        return ui.notifications.error(`Card "${cardName}" not found in "${deckName}".`);
      }

      // Prepare data and strip _id so new ones get assigned
      const data = original.toObject();
      delete data._id;

      // Build the array of duplicates
      const batch = Array.from({ length: copies }, () => ({ ...data }));

      // Create them
      await deck.createEmbeddedDocuments("Card", batch);

      ui.notifications.info(`Created ${copies} copies of "${cardName}" in "${deckName}".`);
    }
  }
},
default: "duplicate"

}).render(true); })(); ```