Datamodel + Appv2 migration, WIP

module/applications/sheets/_module.mjs

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+export { default as BoLBaseItemSheet } from "./base-item-sheet.mjs"
+export { default as BoLItemSheet } from "./item-sheet.mjs"
+export { default as BoLFeatureSheet } from "./feature-sheet.mjs"

module/applications/sheets/base-item-sheet.mjs

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+const { HandlebarsApplicationMixin } = foundry.applications.api
+
+/**
+ * Base Item Sheet for BoL system using AppV2
+ * @extends {ItemSheetV2}
+ */
+export default class BoLBaseItemSheet extends HandlebarsApplicationMixin(foundry.applications.sheets.ItemSheetV2) {
+  constructor(options = {}) {
+    super(options)
+    this.#dragDrop = this.#createDragDropHandlers()
+  }
+
+  #dragDrop
+
+  /** @override */
+  static DEFAULT_OPTIONS = {
+    classes: ["bol", "sheet", "item"],
+    position: {
+      width: 650,
+      height: 780,
+    },
+    form: {
+      submitOnChange: true,
+    },
+    window: {
+      resizable: true,
+    },
+    actions: {
+      editImage: BoLBaseItemSheet.#onEditImage,
+      postItem: BoLBaseItemSheet.#onPostItem,
+    },
+  }
+
+  /**
+   * Tab groups state
+   * @type {object}
+   */
+  tabGroups = { primary: "description" }
+
+  /** @override */
+  async _prepareContext() {
+    const context = {
+      // Document & system
+      fields: this.document.schema.fields,
+      systemFields: this.document.system.schema.fields,
+      item: this.document,
+      system: this.document.system,
+      source: this.document.toObject(),
+      
+      // Enriched content
+      enrichedDescription: await foundry.applications.ux.TextEditor.implementation.enrichHTML(
+        this.document.system.description, 
+        { async: true }
+      ),
+      
+      // Properties
+      category: this.document.system.category,
+      itemProperties: this.document.itemProperties,
+      
+      // Config & permissions
+      config: game.bol.config,
+      isGM: game.user.isGM,
+      isEditable: this.isEditable,
+      
+      // CSS classes for template
+      cssClass: this.options.classes.join(" "),
+      
+      // Tab state
+      tabs: this._getTabs(),
+      activeTab: this.tabGroups.primary || "description"
+    }
+
+    // Add careers if item is on an actor
+    if (this.document.actor) {
+      context.careers = this.document.actor.careers
+    }
+
+    // Apply dynamic defaults based on item type
+    this._applyDynamicDefaults(context)
+
+    return context
+  }
+
+  /**
+   * Get tabs configuration
+   * @returns {object[]}
+   * @private
+   */
+  _getTabs() {
+    return [
+      { id: "description", label: "BOL.ui.tab.description", icon: "fa-solid fa-book" },
+      { id: "properties", label: "BOL.ui.tab.details", icon: "fa-solid fa-cog" }
+    ]
+  }
+
+  /**
+   * Apply dynamic defaults to context based on item type and category
+   * @param {object} context
+   * @private
+   */
+  _applyDynamicDefaults(context) {
+    const itemData = context.item
+
+    if (itemData.type === "item") {
+      // Set default category
+      if (!itemData.system.category) {
+        itemData.system.category = "equipment"
+      }
+
+      // Handle equipment slot
+      if (itemData.system.category === "equipment" && itemData.system.properties.equipable) {
+        if (!itemData.system.properties.slot) {
+          itemData.system.properties.slot = "-"
+        }
+      }
+
+      // Handle spell conditions
+      if (itemData.system.category === 'spell') {
+        if (!itemData.system.properties.mandatoryconditions) {
+          itemData.system.properties.mandatoryconditions = []
+        }
+        if (!itemData.system.properties.optionnalconditions) {
+          itemData.system.properties.optionnalconditions = []
+        }
+        for (let i = 0; i < 4; i++) {
+          itemData.system.properties.mandatoryconditions[i] = itemData.system.properties.mandatoryconditions[i] ?? ""
+        }
+        for (let i = 0; i < 8; i++) {
+          itemData.system.properties.optionnalconditions[i] = itemData.system.properties.optionnalconditions[i] ?? ""
+        }
+      }
+    } else if (itemData.type === "feature") {
+      // Set default subtype/category
+      if (!itemData.system.subtype) {
+        itemData.system.category = "origin"
+      }
+    }
+  }
+
+  /** @override */
+  _onRender(context, options) {
+    super._onRender(context, options)
+    this.#dragDrop.forEach((d) => d.bind(this.element))
+    this._activateTabs()
+    this._activateListeners()
+  }
+
+  /**
+   * Activate tab navigation
+   * @private
+   */
+  _activateTabs() {
+    const nav = this.element.querySelector('nav.tabs[data-group="primary"]')
+    if (!nav) return
+
+    const activeTab = this.tabGroups.primary || "description"
+    
+    // Activate tab links
+    nav.querySelectorAll('[data-tab]').forEach(link => {
+      const tab = link.dataset.tab
+      link.classList.toggle('active', tab === activeTab)
+      link.addEventListener('click', (event) => {
+        event.preventDefault()
+        this.tabGroups.primary = tab
+        this.render()
+      })
+    })
+
+    // Show/hide tab content
+    this.element.querySelectorAll('.tab[data-tab]').forEach(content => {
+      content.classList.toggle('active', content.dataset.tab === activeTab)
+    })
+  }
+
+  /**
+   * Activate custom listeners
+   * @private
+   */
+  _activateListeners() {
+    if (!this.isEditable) return
+
+    // Armor quality change handler
+    const armorQuality = this.element.querySelector('.armorQuality')
+    if (armorQuality) {
+      armorQuality.addEventListener('change', (ev) => {
+        const value = ev.currentTarget.value
+        const soakFormula = this.element.querySelector('.soakFormula')
+        if (soakFormula && game.bol.config.soakFormulas[value]) {
+          soakFormula.value = game.bol.config.soakFormulas[value]
+        }
+      })
+    }
+  }
+
+  // #region Drag-and-Drop Workflow
+  
+  /**
+   * Create drag-and-drop workflow handlers for this Application
+   * @returns {DragDrop[]}
+   * @private
+   */
+  #createDragDropHandlers() {
+    return []
+  }
+
+  // #endregion
+
+  // #region Actions
+
+  /**
+   * Handle editing the item image
+   * @param {PointerEvent} event
+   * @param {HTMLElement} target
+   * @private
+   */
+  static async #onEditImage(event, target) {
+    const fp = new FilePicker({
+      current: this.document.img,
+      type: "image",
+      callback: (path) => {
+        this.document.update({ img: path })
+      },
+    })
+    return fp.browse()
+  }
+
+  /**
+   * Handle posting the item to chat
+   * @param {PointerEvent} event
+   * @param {HTMLElement} target
+   * @private
+   */
+  static async #onPostItem(event, target) {
+    const BoLUtility = (await import("../../system/bol-utility.js")).BoLUtility
+    let chatData = foundry.utils.duplicate(this.document)
+    if (this.document.actor) {
+      chatData.actor = { id: this.document.actor.id }
+    }
+    BoLUtility.postItem(chatData)
+  }
+
+  // #endregion
+}

module/applications/sheets/feature-sheet.mjs

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+import BoLBaseItemSheet from "./base-item-sheet.mjs"
+
+/**
+ * Item Sheet for "feature" type items (boons, careers, origins, etc.)
+ * @extends {BoLBaseItemSheet}
+ */
+export default class BoLFeatureSheet extends BoLBaseItemSheet {
+  
+  /** @override */
+  static DEFAULT_OPTIONS = {
+    ...super.DEFAULT_OPTIONS,
+    classes: [...super.DEFAULT_OPTIONS.classes, "item-type-feature"],
+  }
+
+  /** @override */
+  static PARTS = {
+    main: {
+      template: "systems/bol/templates/item/feature-sheet.hbs",
+    },
+  }
+
+  /** @override */
+  async _prepareContext() {
+    const context = await super._prepareContext()
+    
+    // Add feature-specific context
+    context.isFeature = true
+    context.isBoon = context.system.subtype === "boon"
+    context.isFlaw = context.system.subtype === "flaw"
+    context.isCareer = context.system.subtype === "career"
+    context.isOrigin = context.system.subtype === "origin"
+    context.isRace = context.system.subtype === "race"
+    context.isFightOption = context.system.subtype === "fightoption"
+    context.isEffect = context.system.subtype === "effect"
+    context.isHoroscope = context.system.subtype === "horoscope"
+    context.isXpLog = context.system.subtype === "xplog"
+    
+    return context
+  }
+}

module/applications/sheets/item-sheet.mjs

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+import BoLBaseItemSheet from "./base-item-sheet.mjs"
+
+/**
+ * Item Sheet for "item" type items (equipment, weapons, etc.)
+ * @extends {BoLBaseItemSheet}
+ */
+export default class BoLItemSheet extends BoLBaseItemSheet {
+  
+  /** @override */
+  static DEFAULT_OPTIONS = {
+    ...super.DEFAULT_OPTIONS,
+    classes: [...super.DEFAULT_OPTIONS.classes, "item-type-item"],
+  }
+
+  /** @override */
+  static PARTS = {
+    main: {
+      template: "systems/bol/templates/item/item-sheet.hbs",
+    },
+  }
+
+  /** @override */
+  async _prepareContext() {
+    const context = await super._prepareContext()
+    
+    // Add item-specific context
+    context.isItem = true
+    context.isEquipment = context.category === "equipment"
+    context.isWeapon = context.category === "weapon"
+    context.isProtection = context.category === "protection"
+    context.isSpell = context.category === "spell"
+    context.isAlchemy = context.category === "alchemy"
+    context.isCapacity = context.category === "capacity"
+    context.isMagical = context.category === "magical"
+    context.isVehicle = context.category === "vehicle"
+    
+    return context
+  }
+}