Neo-Tokyo Neon Noir design pour fiches items

- Nouvelle palette : #080c14 fond, accents néon par type (#00d4d4 item, #ff3d5a kungfu, #4a9eff spell, #cc44ff supernatural)
- Nouveaux composants LESS : .cde-neon-header (clip-path angulaire + accent line), .cde-avatar (clip-path), .cde-stat-grid/.cde-stat-cell (style terminal), .cde-badge (parallélogramme), .cde-neon-tabs (underline néon animé), .cde-check-cell
- Fix layout : .cde-sheet width: 100% + height: 100% + overflow: hidden, .cde-tab-body flex: 1 + min-height: 0, .cde-notes-editor flex stretch
- Fix positions : DEFAULT_OPTIONS height explicite pour tous les types (item 620x580, spell 660x680, kungfu 720x680, supernatural 560x520)
- 4 templates items reécrits avec nouvelles classes et structure épurée

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/ui/sheets/items/base.js

@@ -0,0 +1,43 @@
+const { HandlebarsApplicationMixin } = foundry.applications.api
+
+export class CDEBaseItemSheet extends HandlebarsApplicationMixin(foundry.applications.sheets.ItemSheetV2) {
+  static DEFAULT_OPTIONS = {
+    classes: ["fvtt-chroniques-de-l-etrange", "item"],
+    position: { width: 520, height: "auto" },
+    window: { resizable: true },
+    form: { submitOnChange: true },
+    actions: {},
+  }
+
+  tabGroups = { primary: "description" }
+
+  async _prepareContext() {
+    const cssClass = this.options.classes?.join(" ") ?? ""
+    const enrichedDescription = await foundry.applications.ux.TextEditor.implementation.enrichHTML(this.document.system.description ?? "", { async: true })
+    const enrichedNotes = await foundry.applications.ux.TextEditor.implementation.enrichHTML(this.document.system.notes ?? "", { async: true })
+    return {
+      item: this.document,
+      system: this.document.system,
+      systemData: this.document.system,
+      editable: this.isEditable,
+      cssClass,
+      enrichedDescription,
+      enrichedNotes,
+      descriptionHTML: enrichedDescription,
+      notesHTML: enrichedNotes,
+    }
+  }
+
+  async _onFirstRender(context, options) {
+    await super._onFirstRender(context, options)
+    for (const [group, tab] of Object.entries(this.tabGroups)) {
+      this.changeTab(tab, group, { force: true })
+    }
+  }
+
+  _onRender(context, options) {
+    for (const [group, tab] of Object.entries(this.tabGroups)) {
+      this.changeTab(tab, group, { force: true })
+    }
+  }
+}