feat: scene traps, material legends, and scene editor window

Add trap overlays with session state, material legend editor/panel, and a dedicated scene editor window wired through IPC and project persistence.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/shared/appBranding.ts

@@ -23,6 +23,7 @@ export type AppWindowKind =
   | 'sceneDescription'
   | 'materials'
   | 'npcsEditor'
+  | 'sceneEditor'
   | 'npcs';
 
 const WINDOW_SUFFIX: Record<AppWindowKind, { ru: string; en: string }> = {
@@ -33,6 +34,7 @@ const WINDOW_SUFFIX: Record<AppWindowKind, { ru: string; en: string }> = {
   sceneDescription: { ru: 'Описание сцены', en: 'Scene description' },
   materials: { ru: 'Материалы', en: 'Materials' },
   npcsEditor: { ru: 'НПС', en: 'NPCs' },
+  sceneEditor: { ru: 'Редактор сцены', en: 'Scene editor' },
   npcs: { ru: 'НПС', en: 'NPCs' },
 };