Fix event leaks, employee clone, DetailWindow refresh, and dead code

[Trawis]

• SubscribeToEvents/UnsubscribeFromEvents: replace lambda wrappers with method groups so -= actually removes the registered handler (lambdas always create new delegate instances, so the old -= was a no-op, stacking duplicate handlers on every scene load)
• DetailWindowTrainer: add Reset() and call it on MainMenu load so Install() runs again when the player starts a second game session
• SetCreativity clone: fix the DetailWindow refresh condition — compared actor directly (CurrentEmployee is Actor) and call Show(actor) instead of the unreachable employee comparison that was always false after the actor.employee swap
• SetCreativity clone: copy the missing Employee fields that were silently dropped: NickName, Founder, MadeCEO, Dismissed, Retired, PreviousEmployment, AgeMonth, SkillCeiling, LowestSatisfaction, DemandsMet, DemandsRequested, CustomBenefits, LeadProjects, LeadProjectsFix
• SellProductStock: moved dialog after the product check so it does not fire when there is nothing to sell
• ForceBankruptAction: removed leftover DevConsole debug log
• Removed DisableSkillDecay (declared but never implemented) and ReduceBoxPrice (AI.BoxPrice is a compile-time const, runtime assignment has no effect) from Helpers.Settings and all call sites
• Fix typos: "setted up" -> "set" (x3), "takovered" -> "taken over"

[codacy-production]

Not up to standards ⛔

🔴 Issues 2 high

Alerts:
⚠ 2 issues (≤ 0 issues of at least minor severity)

Results:
2 new issues

Category	Results
ErrorProne	2 high

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🟢 Metrics 0 complexity · 0 duplication

Metric	Results
Complexity	0
Duplication	0

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