Fix packaged build: weak ptr timing, factory module, hard refs, brace fix

Critical fixes for packaged builds:
- Widget weak ptrs (SpawnManager/SceneSerializer) are null in packaged due to
  HUD deferred init. All button lambdas now get references fresh from
  PlayerController via GetOwningPlayer() cast instead of cached weak ptrs.
- HUD BeginPlay deferred by one tick (SetTimerForNextTick) to ensure
  PlayerController has initialized SpawnManager before wiring.

Module split:
- Factories moved to separate PS_EditorTools module (Type: Editor)
  to fix UHT error with UFactory in packaging builds.
- PS_Editor module no longer depends on UnrealEd for factories.

Asset references:
- TSoftObjectPtr/TSoftClassPtr changed to TObjectPtr/TSubclassOf for
  MasterCatalog, SpawnCatalogs, and ActorClass entries. Hard references
  ensure assets are cooked in packaged builds.

Other fixes:
- GetActorLabel() replaced with GetClass()->GetName() (editor-only API)
- Missing brace in Browse dialog BaseLevel sync code
- BaseLevel sync only when scenario specifies a LevelName (no more clearing on empty)
- Save As dialog with native Windows file picker
- Debug info in catalog UI when empty (shows chain: Master→Catalogs→Entries)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Unreal/Build/Windows/Manifest_DebugFiles_Win64.txt

@@ -0,0 +1,8 @@
+PS_ProserveEditor/Binaries/Win64/PS_ProserveEditor.pdb	2026-04-12T16:10:34.169Z
+PS_ProserveEditor/Binaries/Win64/tbb.pdb	2024-11-16T08:24:56.090Z
+PS_ProserveEditor/Binaries/Win64/tbbmalloc.pdb	2024-11-16T08:24:56.095Z
+Engine/Content/SlateDebug/Fonts/LastResort.tps	2024-11-16T08:31:35.685Z
+Engine/Content/SlateDebug/Fonts/LastResort.ttf	2024-11-16T08:31:35.689Z
+Engine/Extras/GPUDumpViewer/GPUDumpViewer.html	2024-11-16T08:37:30.603Z
+Engine/Extras/GPUDumpViewer/OpenGPUDumpViewer.bat	2024-11-16T08:37:30.603Z
+Engine/Extras/GPUDumpViewer/OpenGPUDumpViewer.sh	2024-11-16T08:37:30.603Z