feat(jobs): Jobs.1 client UI infra (handler + library + tecla J) + UI tweaks

Infraestrutura cliente da promocao de classe (Jobs.1). WBP_JobChangePanel
NAO esta neste commit — foi exploracao descartada (criar UI dinamica de
botoes via MCP BP graph esbarrou em limites do CreateWidget node). A
fundacao C++ fica pronta pra ser usada quando voltarmos pra UI.

INFRA C++ NOVA (Source/ZMMOJobs/)
* UZMMOJobChangeNetworkHandler (WorldSubsystem novo) — bind no
  OnJobChangeResult do plugin e re-broadcast via FZMMOOnJobChangeResultBP
  (dynamic multicast assignavel em BP). WBP futura escuta direto.
* UZMMOJobsSubsystem helpers: GetJobsByTier(EZMMOJobTier) +
  GetEligibleNextJobs(currentClassId) — filtra por ParentClassId. Pure.
* UZMMOJobsLibrary BPFL wrappers + SendJobChangeRequest convenience
  (delega pro UZeusNetworkSubsystem). Dep ZeusNetwork adicionada no
  Build.cs.

ENUM + INPUT
* EZMMOInGameUIState ganha JobChangePanel (entre StatusWindow e
  Inventory). DA_InGameScreenSet pendente de receber entry quando
  WBP for criada (tecla J vai falhar silenciosamente ate la).
* ZMMOPlayerController: tecla J -> ToggleJobChangePanel ->
  Flow->ToggleScreen(JobChangePanel). Espelha pattern do Alt+A do
  StatusWindow (InputComponent legacy BindKey + FInputChord).

UI TWEAKS
* WBP_StatusWindow + DT_UI_Styles: ajustes visuais no Editor durante a
  sessao (sem mudanca funcional documentavel — provavelmente fontes/
  spacing/cores).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Source/ZMMOJobs/Private/ZMMOJobChangeNetworkHandler.cpp

@@ -0,0 +1,67 @@
+#include "ZMMOJobChangeNetworkHandler.h"
+
+#include "Engine/GameInstance.h"
+#include "Engine/World.h"
+#include "ZeusNetworkSubsystem.h"
+
+DEFINE_LOG_CATEGORY_STATIC(LogZMMOJobChange, Log, All);
+
+bool UZMMOJobChangeNetworkHandler::ShouldCreateSubsystem(UObject* Outer) const
+{
+	// Mesmo criterio do AttributeNetworkHandler — so' em mundos de gameplay
+	// (PIE / standalone in-game). Editor preview / front-end menu nao precisa.
+	const UWorld* World = Cast<UWorld>(Outer);
+	if (World == nullptr) { return false; }
+	return World->WorldType == EWorldType::Game
+		|| World->WorldType == EWorldType::PIE;
+}
+
+void UZMMOJobChangeNetworkHandler::Initialize(FSubsystemCollectionBase& Collection)
+{
+	Super::Initialize(Collection);
+
+	if (UZeusNetworkSubsystem* Net = GetZeusNetSubsystem())
+	{
+		JobChangeResultHandle = Net->OnJobChangeResult.AddUObject(
+			this, &UZMMOJobChangeNetworkHandler::HandleJobChangeResult);
+		UE_LOG(LogZMMOJobChange, Log,
+			TEXT("[ZMMOJobChangeNetworkHandler] Bind OnJobChangeResult OK"));
+	}
+	else
+	{
+		UE_LOG(LogZMMOJobChange, Warning,
+			TEXT("[ZMMOJobChangeNetworkHandler] ZeusNetworkSubsystem indisponivel — bind pulado"));
+	}
+}
+
+void UZMMOJobChangeNetworkHandler::Deinitialize()
+{
+	if (UZeusNetworkSubsystem* Net = GetZeusNetSubsystem())
+	{
+		if (JobChangeResultHandle.IsValid())
+		{
+			Net->OnJobChangeResult.Remove(JobChangeResultHandle);
+			JobChangeResultHandle.Reset();
+		}
+	}
+	OnJobChangeResult.Clear();
+	Super::Deinitialize();
+}
+
+void UZMMOJobChangeNetworkHandler::HandleJobChangeResult(
+	bool bAccepted, int32 Reason, int32 NewClassId)
+{
+	UE_LOG(LogZMMOJobChange, Log,
+		TEXT("[ZMMOJobChangeNetworkHandler] S_JOB_CHANGE_RESULT accepted=%d reason=%d newClassId=%d"),
+		bAccepted ? 1 : 0, Reason, NewClassId);
+	OnJobChangeResult.Broadcast(bAccepted, Reason, NewClassId);
+}
+
+UZeusNetworkSubsystem* UZMMOJobChangeNetworkHandler::GetZeusNetSubsystem() const
+{
+	const UWorld* World = GetWorld();
+	if (World == nullptr) { return nullptr; }
+	UGameInstance* GI = World->GetGameInstance();
+	if (GI == nullptr) { return nullptr; }
+	return GI->GetSubsystem<UZeusNetworkSubsystem>();
+}