Remove the Operator HUD layout

Display > HUD > Layout and the set_hud voice action now offer Tactical,
Minimal and Cyber. The Operator option, its CSS and its QA coverage are
removed, and the unused "Operator" translations are pruned.

Share-link codes are append-only, so operator keeps its hudVariant code.
A link, scene or saved state that names it restores the default Tactical
layout. The voice schema pins keep their legacy digests by restoring the
retired value before comparing; the full-payload digest is re-derived.

src/i18n/locales/es.json

@@ -76,7 +76,6 @@
   "Layout": "Disposición",
   "HUD layout": "Disposición del HUD",
   "Tactical": "Táctica",
-  "Operator": "De operador",
   "Minimal": "Mínima",
   "Detection Overlay (D)": "Superposición de detección (D)",
   "Detection overlay": "Superposición de detección",

src/i18n/locales/ru.json

@@ -777,7 +777,6 @@
   "Fade": "Затухание",
   "Outside": "Снаружи",
   "Tactical": "Тактический",
-  "Operator": "Операторский",
   "Minimal": "Минимальный",
   "HUD layout": "Макет HUD",
   "Layout": "Макет",

src/i18n/locales/zh-CN.json

@@ -2616,7 +2616,6 @@
   "Layout": "布局",
   "HUD layout": "HUD 布局",
   "Tactical": "战术",
-  "Operator": "操作员",
   "Minimal": "精简",
   "Cyber": "赛博",
   "Sonar": "声呐",

src/i18n/locales/zh-Hant.json

@@ -2604,7 +2604,6 @@
   "Layout": "佈局",
   "HUD layout": "HUD 佈局",
   "Tactical": "戰術",
-  "Operator": "操作員",
   "Minimal": "精簡",
   "Cyber": "賽博",
   "Sonar": "聲吶",