feat(ui/loading): tela de loading dinamica data-driven (etapas + dicas)

- UUILoadingScreen_Base (Game/UI/Common/) generica: Configure(Context),
  MarkStepRunning/Done/Failed, OnLoadingComplete delegate, progress bar
  reativa e rotacao automatica de dicas via timer.
- Etapas configuradas por contexto em UZMMOLoadingProfilesDataAsset
  (DA_LoadingProfiles). Perfil inicial FrontEndEnteringWorld:
  Travel -> MapLoaded -> Spawn.
- Dicas em DT_LoadingTips (FText localizavel + filtro por contexto +
  GameplayTag de categoria). 4 dicas seed.
- UIFrontEndFlowSubsystem agora bloqueia a transicao InWorld ate o
  HandlePlayerSpawned (bIsLocal=true) — usuario nao ve mundo vazio.
- WBP_Loading em /UI/Shared/Loading/ (neutro, reusavel pelo InGame futuro);
  DA_FrontEndScreenSet[EnteringWorld] aponta pra ele.
- DefaultGame.ini wire LoadingProfilesAsset + LoadingTipsAsset.

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

Config/DefaultGame.ini

@@ -35,6 +35,12 @@ ScreenSetAsset=/Game/ZMMO/UI/FrontEnd/DA_FrontEndScreenSet.DA_FrontEndScreenSet
 ; cliente resolve `mapId -> ClientLevel/spawns` via FZMMOMapDef rows.
 MapsTableAsset=/Game/ZMMO/Data/World/DT_Maps.DT_Maps
 
+; Loading dinâmico (etapas + dicas). DA_LoadingProfiles tem 1 perfil por
+; contexto (EZMMOLoadingContext); DT_LoadingTips rotaciona durante o load.
+; Cliente local marca etapas via eventos (sem opcode novo).
+LoadingProfilesAsset=/Game/ZMMO/Data/UI/Loading/DA_LoadingProfiles.DA_LoadingProfiles
+LoadingTipsAsset=/Game/ZMMO/Data/UI/Loading/DT_LoadingTips.DT_LoadingTips
+
 ; -----------------------------------------------------------------------------
 ; UI in-game (PR 19+). Espelho do front-end pattern:
 ; - ScreenSetAsset mapeia EZMMOInGameUIState -> WBP (Playing -> WBP_HUD,