polish(economy): surface bank/lootbox/achievement stats in /stats and /adminview

- /stats and /profile stats now show lootboxes opened and achievements unlocked
  alongside the best streak.
- /adminview shows bank balance, achievements count, lootboxes opened, and any
  pending (escrowed) wager.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013VbAVsrZuYesea99mPMmPT

strings/admin.py

@@ -19,6 +19,9 @@ ADMINVIEW_UI: dict[str, str] = {
     "banned_yes":      "🚫 JAH",
     "banned_no":       "✅ Ei",
     "f_balance":       "💰 Saldo",
+    "f_bank":          "🏦 Pangas",
+    "f_extras":        "🏅 Muu",
+    "extras_val":      "Saavutusi: {ach}\nÕnnekaste: {lootboxes}\nOotel panus: {wager}",
     "f_exp":           "📊 EXP / Tase",
     "f_streak":        "🔥 Streak",
     "f_banned":        "🚫 Keelatud",