Resume: exiting a match keeps it alive instead of destroying it

Leaving the table (back button, browser/hardware back) no longer resets the
game — it minimizes it and stays resumable:
- game-store: add `paused` + minimize()/resume(). Single-player (AI) matches
  pause their local timers so nothing happens while away; live (server-run)
  matches keep streaming via the still-active subscription (the .NET GameRoom
  already runs the match to completion and re-broadcasts state on reconnect).
- GameScreen: an unmount effect minimizes any in-progress match no matter how
  you leave; only a finished match (reward dismissed) tears down.
- ResumeGameBar: floating "return to game" pill shown from any screen while a
  match is alive, or while a finished match still has an unseen reward.
- page.tsx: after a full reload, re-enter live mode (minimized) when the server
  re-broadcasts state, and notify when a match you left finishes while away.

Verified: tsc + next build clean; web image rebuilt and serving on :1500.

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

src/lib/i18n.tsx

@@ -29,6 +29,11 @@ const fa: Dict = {
   "home.lang": "English",
   "home.onlineCount": "{n} نفر آنلاین",
 
+  "resume.title": "بازی در جریان",
+  "resume.cta": "بازگشت به بازی",
+  "resume.matchEnded": "بازی به پایان رسید",
+  "resume.matchEndedBody": "نتیجه و جایزه را ببینید",
+
   "seat.you": "شما",
   "team.us": "ما",
   "team.them": "حریف",
@@ -270,6 +275,11 @@ const en: Dict = {
   "home.lang": "فارسی",
   "home.onlineCount": "{n} players online",
 
+  "resume.title": "Game in progress",
+  "resume.cta": "Return to game",
+  "resume.matchEnded": "Match ended",
+  "resume.matchEndedBody": "See the result and reward",
+
   "seat.you": "You",
   "team.us": "Us",
   "team.them": "Them",