First round of changes

system/scripts/items/arcane-sheet.js

@@ -0,0 +1,44 @@
+import { BaseItemSheetL5r5e } from "./base-item-sheet.js";
+
+/**
+ * Sheet for Arcane items (Chiaroscuro).
+ * @extends {BaseItemSheetL5r5e}
+ */
+export class ArcaneSheetL5r5e extends BaseItemSheetL5r5e {
+    /** @override */
+    static get defaultOptions() {
+        return foundry.utils.mergeObject(super.defaultOptions, {
+            classes: ["l5r5e", "sheet", "arcane"],
+            template: CONFIG.l5r5e.paths.templates + "items/arcane/arcane-sheet.html",
+            tabs: [{ navSelector: ".sheet-tabs", contentSelector: ".sheet-body", initial: "attributes" }],
+        });
+    }
+
+    /** @override */
+    async getData(options = {}) {
+        const sheetData = await super.getData(options);
+
+        // Convert application array to comma-separated string for display
+        const app = sheetData.data.system.application;
+        sheetData.data.system.applicationDisplay = Array.isArray(app) ? app.join(", ") : (app ?? "");
+
+        sheetData.data.enrichedHtml = {
+            description: await foundry.applications.ux.TextEditor.implementation.enrichHTML(
+                sheetData.data.system.description ?? "",
+                { async: true }
+            ),
+        };
+
+        return sheetData;
+    }
+
+    /** @override */
+    async _updateObject(event, formData) {
+        // Convert comma-separated application string back to array
+        const raw = formData["system.applicationDisplay"] ?? "";
+        formData["system.application"] = raw.split(",").map((s) => s.trim()).filter(Boolean);
+        delete formData["system.applicationDisplay"];
+
+        return super._updateObject(event, formData);
+    }
+}