UI: visible pause button + tighter, dimmer selection bracket

- speed.pause was "⏸" (U+23F8), a glyph the bitmap font lacks, so the pause button
  rendered blank/invisible (x1/x3/x6 are ASCII and showed). Use the word Pause/Пауза.
- Selection bracket was radius x2.2 of the sprite''s bounding CIRCLE (half-diagonal),
  so it sat much larger than the entity, in a bright opaque blue. Shrink to x1.4 and
  mute the tint so it hugs the target without shouting.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Mods/Core/Languages/ru/ui.json

@@ -135,7 +135,7 @@
   "pause.mainmenu": "Главное меню",
   "pause.quit": "Выход",
   "pause.saved": "Сохранено: {0}",
-  "speed.pause": "⏸",
+  "speed.pause": "Пауза",
   "credits.title": "Авторы",
   "credits.author": "mrleo1nid",
   "credits.role": "Идея, код, движок mrgameeng",