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/Public/ZMMOJobChangeNetworkHandler.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Subsystems/WorldSubsystem.h"
+#include "ZMMOJobChangeNetworkHandler.generated.h"
+
+class UZeusNetworkSubsystem;
+
+/**
+ *  Multicast dinamico assignable em Blueprint. WBP de promocao binda no
+ *  OnJobChangeResult pra reagir ao S_JOB_CHANGE_RESULT (1520) do server.
+ *
+ *  Parametros:
+ *   - bAccepted    : true = promocao aplicada (S_ATTRIBUTE_SNAPSHOT_FULL
+ *                    chega logo apos com state novo).
+ *   - Reason       : EJobChangeRejectReason (None/NoSession/UnknownJob/
+ *                    NotParent/WrongTier/JobLevelTooLow/AlreadyAtTarget/
+ *                    JobsDbUnavailable). Significativo apenas se !bAccepted.
+ *   - NewClassId   : significativo apenas se bAccepted=true (redundante com
+ *                    snapshot que vem junto, mas util pra triggers/toasts).
+ */
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_ThreeParams(FZMMOOnJobChangeResultBP,
+	bool, bAccepted, int32, Reason, int32, NewClassId);
+
+/**
+ *  Bridge entre o `UZeusNetworkSubsystem` (do plugin ZeusNetwork) e a UI
+ *  Blueprint (WBP de promocao). Mesmo pattern do `UZMMOAttributeNetworkHandler`
+ *  — converte o delegate C++-only `FZeusOnJobChangeResult` num dynamic
+ *  multicast (`FZMMOOnJobChangeResultBP`) assignavel em BP.
+ *
+ *  Por que UWorldSubsystem? Player so' faz promocao quando ja' esta no
+ *  WorldServer (com mundo carregado). No front-end / lobby, esse subsystem
+ *  nao existe — economiza memoria.
+ */
+UCLASS()
+class ZMMOJOBS_API UZMMOJobChangeNetworkHandler : public UWorldSubsystem
+{
+	GENERATED_BODY()
+
+public:
+	virtual void Initialize(FSubsystemCollectionBase& Collection) override;
+	virtual void Deinitialize() override;
+	virtual bool ShouldCreateSubsystem(UObject* Outer) const override;
+
+	/// Assignavel em BP: WBP_JobChangePanel.OnEvent_OnJobChangeResult.
+	UPROPERTY(BlueprintAssignable, Category = "Zeus|Jobs")
+	FZMMOOnJobChangeResultBP OnJobChangeResult;
+
+private:
+	void HandleJobChangeResult(bool bAccepted, int32 Reason, int32 NewClassId);
+	UZeusNetworkSubsystem* GetZeusNetSubsystem() const;
+
+	FDelegateHandle JobChangeResultHandle;
+};