Fixed class/subclass drag-drop

module/applications/dialogs/multiclassChoiceDialog.mjs

@@ -0,0 +1,73 @@
+const { HandlebarsApplicationMixin, ApplicationV2 } = foundry.applications.api;
+
+export default class MulticlassChoiceDialog extends HandlebarsApplicationMixin(ApplicationV2) {
+    constructor(actor, multiclass, options) {
+        super(options);
+
+        this.actor = actor;
+        this.multiclass = multiclass;
+        this.selectedDomain = null;
+    }
+
+    get title() {
+        return game.i18n.format('DAGGERHEART.APPLICATIONS.MulticlassChoice.title', { actor: this.actor.name });
+    }
+
+    static DEFAULT_OPTIONS = {
+        classes: ['daggerheart', 'dh-style', 'dialog', 'views', 'multiclass-choice'],
+        position: { width: 'auto', height: 'auto' },
+        window: { icon: 'fa-solid fa-person-rays' },
+        actions: {
+            save: MulticlassChoiceDialog.#save,
+            selectDomain: MulticlassChoiceDialog.#selectDomain
+        }
+    };
+
+    static PARTS = {
+        application: {
+            id: 'multiclass-choice',
+            template: 'systems/daggerheart/templates/dialogs/multiclassChoice.hbs'
+        }
+    };
+
+    async _prepareContext(_options) {
+        const context = await super._prepareContext(_options);
+        context.multiclass = this.multiclass;
+        context.domainChoices = this.multiclass.domains.map(value => {
+            const domain = CONFIG.DH.DOMAIN.domains[value];
+            return {
+                value: value,
+                label: game.i18n.localize(domain.label),
+                description: game.i18n.localize(domain.description),
+                src: domain.src,
+                selected: value === this.selectedDomain,
+                disabled: this.actor.system.domains.includes(domain)
+            };
+        });
+        context.multiclassDisabled = !this.selectedDomain;
+
+        return context;
+    }
+
+    /** @override */
+    _onClose(options = {}) {
+        if (!options.submitted) this.move = null;
+    }
+
+    static async configure(actor, multiclass, options = {}) {
+        return new Promise(resolve => {
+            const app = new this(actor, multiclass, options);
+            app.addEventListener('close', () => resolve(app.selectedDomain), { once: true });
+            app.render({ force: true });
+        });
+    }
+
+    static #save() {
+        this.close({ submitted: true });
+    }
+
+    static #selectDomain(_event, button) {
+        this.selectedDomain = this.selectedDomain === button.dataset.domain ? null : button.dataset.domain;
+        this.render();
+    }
+}