…ion, tint management, teleport fallback, typing

- Fix #1: Dual Wield Mastery buff spam — use tag-based guard instead of wrong stat name
- Fix #2: Monster respawn stat inflation — use originalDefinition to prevent compounding
- Fix #3: preFX.clear() on effect expiry — re-apply remaining active tints after clear
- Fix #4: Teleport no fallback — abort teleport and refund mana when no walkable tile found
- Fix #5: applyStatusTint() every frame — add statusTintApplied tracking map
- Fix #6: Curse aura 'as any' — add optional tag field to ActiveBuff interface
- Fix #7: Frenzy description mismatch — remove attack speed claim, match damageBonus mechanic

30 new validation tests covering all fixes. 1473 total tests pass.

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>