ui/phase-23: turn-report view with twenty sections and TOC

Replaces the Phase 10 report stub with a scrollable orchestrator that
renders every FBS array as a dedicated section (galaxy summary, votes,
player status, my/foreign sciences, my/foreign ship classes, battles,
bombings, approaching groups, my/foreign/uninhabited/unknown planets,
ships in production, cargo routes, my fleets, my/foreign/unidentified
ship groups). A sticky table of contents (a <select> on mobile),
"back to map" affordance, IntersectionObserver-driven active-section
highlight, and SvelteKit Snapshot-based scroll save/restore round out
the view.

GameReport gains six new fields (players, otherScience, otherShipClass,
battleIds, bombings, shipProductions); decodeReport, the synthetic-
report loader, the e2e fixture builder, and EMPTY_SHIP_GROUPS extend
in lockstep. ~90 new i18n keys land in en + ru together.

The legacy-report parser is extended to populate the new sections from
the dg/gplus text formats (Your Sciences, <Race> Sciences, <Race> Ship
Types, Bombings, Ships In Production). Ships-in-production prod_used
is derived through a new pkg/calc.ShipBuildCost helper; the engine's
controller.ProduceShip refactors to call the same helper without any
behaviour change (engine tests stay unchanged and green). Battles
remain in the parser's Skipped list — the legacy text carries no
stable per-battle UUID.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docs/FUNCTIONAL.md

@@ -654,6 +654,16 @@ Per-turn reports are read-only views fetched from the engine on
 demand. Backend authorises the caller and forwards the request;
 there is no caching or denormalisation in this path.
 
+The web client renders the report as one section per FBS array
+(galaxy summary, votes, player status, my / foreign sciences, my /
+foreign ship classes, battles, bombings, approaching groups, my /
+foreign / uninhabited / unknown planets, ships in production,
+cargo routes, my fleets, my / foreign / unidentified ship groups).
+Empty sections render explicit empty-state copy. Section anchors
+are exposed in a sticky table of contents (a `<select>` on mobile)
+and the scroll position is preserved across active-view switches
+via SvelteKit's `Snapshot` API.
+
 ### 6.5 Side effects
 
 A successful turn generation publishes a runtime snapshot into the

docs/FUNCTIONAL_ru.md

@@ -671,6 +671,16 @@ Per-turn-отчёты — read-only-вью, забираемые из движк
 Backend авторизует вызывающего и форвардит запрос; в этом пути
 нет ни кэширования, ни денормализации.
 
+Web-клиент рендерит отчёт как одну секцию на каждый FBS-массив
+(общие сведения, голоса, статус игроков, мои / чужие науки, мои /
+чужие классы кораблей, сражения, бомбардировки, приближающиеся
+группы, мои / чужие / необитаемые / неопознанные планеты, корабли в
+производстве, грузовые маршруты, мои флоты, мои / чужие /
+неопознанные группы кораблей). Пустые секции получают явную копию
+empty-state. Якоря секций отображены в sticky-TOC (на мобильном —
+`<select>`); позиция скролла сохраняется при переключении активного
+представления через SvelteKit `Snapshot` API.
+
 ### 6.5 Побочные эффекты
 
 Успешная генерация хода публикует runtime-snapshot в lobby-модуль,