Stage 17: backend defect fixes (nudge code, TG name, robot names/timing, multi-device push, move-duration metric + admin analytics)

- #3 nudge-on-own-turn: distinct result code nudge_own_turn + i18n (was reused 'not_your_turn')
- #2 sanitize connector registration name to the editable format; Player/Игрок-XXXXX fallback
- #5 variant-aware robot name pools (composed full/colloquial first + surname forms; ru gets <=20% latin)
- #4 move-number-aware robot move timing (early 1-5min -> late 10-90min, skew k=4)
- #7 emit move event to the actor too (multi-device sync); opponent_moved stays in-app only
- #1 live game_move_duration{variant,phase} histogram + admin console per-user min/avg/max columns and an inline-SVG move-time-by-move-number chart (offline from the journal)
- ProvisionRobot bypasses editor name validation (system names like 'Peter J.')

ui/src/lib/i18n/en.ts

@@ -148,6 +148,7 @@ export const en = {
   'lang.ru': 'Русский',
 
   'error.not_your_turn': "It is not your turn.",
+  'error.nudge_own_turn': 'It is your turn — there is no one to nudge.',
   'error.illegal_play': 'That is not a legal play.',
   'error.hint_unavailable': 'No hints available.',
   'error.no_hint_available': 'No options with your letters.',

ui/src/lib/i18n/ru.ts

@@ -149,6 +149,7 @@ export const ru: Record<MessageKey, string> = {
   'lang.ru': 'Русский',
 
   'error.not_your_turn': 'Сейчас не ваш ход.',
+  'error.nudge_own_turn': 'Сейчас ваш ход — некого торопить.',
   'error.illegal_play': 'Это недопустимый ход.',
   'error.hint_unavailable': 'Подсказки недоступны.',
   'error.no_hint_available': 'Нет вариантов с вашим набором.',