Pin the retired Operator code and test the live HUD fallback

qa-radio cycles Minimal, off, on, then Tactical, so the HUD toggle must
restore a non-default layout, and expects that sequence instead of the
removed Operator step.

The share-link test pins the exact hudVariant codes, so dropping or
moving operator's reserved code fails it. A live IntelHUD test checks
that a retired Operator layout falls back to Tactical, and the Cyber
test stub themes from the normalized value.

The share-link table marks operator as retired, and the zh-CN glossary
drops the removed string.

docs/SHARE-LINK-FORMAT.md

@@ -107,7 +107,7 @@ probability of about 255 in 256 (many of them already fail as base64url).
 | 13  | thing                        | LEN   | none        | sub-message, see thing views                            |
 | 14  | `style`                      | enum  | `normal`    | normal, retro, surveillance, thermal, anime, noir, snow |
 | 15  | `mapStack`                   | enum  | `photoreal` | photoreal, bing-aerial, bing-labels, esri-imagery, osm  |
-| 16  | `hudVariant`                 | enum  | style       | tactical, operator, minimal, cyber                      |
+| 16  | `hudVariant`                 | enum  | style       | tactical, operator (retired), minimal, cyber            |
 | 17  | `bloomIntensity`             | uint  | style       |                                                         |
 | 18  | `bloomVersion`               | uint  | 2           |                                                         |
 | 19  | `sharpenIntensity`           | uint  | style       |                                                         |

docs/translations/zh-CN.md

@@ -43,7 +43,7 @@ Translation sources: abiyeenzo (#914) and EDIT-Aeterna (#979).
 | briefing / panel / dock               | 简报 / 面板 / 停靠栏        |
 | preset / visual preset                | 预设 / 视觉预设             |
 | Display / HUD layout                  | 显示 / HUD 布局             |
-| Tactical / Operator / Minimal / Cyber | 战术 / 操作员 / 精简 / 赛博 |
+| Tactical / Minimal / Cyber            | 战术 / 精简 / 赛博          |
 | Scope (circular viewport mask) / keyhole | 视域                      |
 | Clean UI                              | 纯净界面                    |
 | cockpit                               | 座舱                        |