Add rival duels, babysitting service, multilingual !define, economy tuning

Rival System:
- RPS-based duels between combat level 5+ players (best of 3, ties re-prompt)
- Stakes scale with level, split 50/50 between winner and community pot
- 3-4 day randomized challenge interval, 7-day same-pair cooldown
- 24h response window with auto-forfeit
- Full flavor text pools, character sheet integration, !adventure rivals

Babysitting Service:
- Weekly/monthly auto-play service targeting weakest skill
- Babysitter rerolls death, claims items, credits gold and XP
- Rivals automatically declined during service
- End-of-service summary with diaper report

Revive fixes:
- On-demand revive in handleMenu, parseAndResolveChoice, handleStatus
- Morning DM respawn check now runs before babysit interception
- Players no longer stuck dead after DeadUntil expires mid-day

Other changes:
- Multilingual !define searches all DreamDict languages by default
- TwinBee empty haul now shows "jackshit" instead of blank
- Wordle solve payouts increased (e.g. 1-guess: €100 -> €500)
- Per-message euro payouts doubled across all tiers
- Audit fixes: user locks on RPS/babysit handlers, TOCTOU on gold
  transfers, dead code removal, deprecated strings.Title replaced,
  error logging on silent failures

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/plugin/euro.go

@@ -121,15 +121,15 @@ func (p *EuroPlugin) awardPassiveEuros(ctx MessageContext) {
 	var amount float64
 	switch {
 	case words >= 51:
-		amount = 10.00
+		amount = 20.00
 	case words >= 26:
-		amount = 5.00
+		amount = 10.00
 	case words >= 11:
-		amount = 2.50
+		amount = 5.00
 	case words >= 4:
-		amount = 1.25
+		amount = 2.50
 	default:
-		amount = 0.50
+		amount = 1.00
 	}
 
 	p.ensureBalance(ctx.Sender)