Add selection outline post-process setup (material pending)

- PostProcessComponent on Pawn (unbound, applies to entire scene)
- Auto-loads M_PS_Editor_SelectionOutline material at BeginPlay
- Removed debug bounding box from Tick
- Custom depth stencil already toggled on selected actors
- Material needs to be created in UE editor (edge detection on CustomStencil)
- Instructions: use TexCoord + Constant2Vector offsets for 4-neighbor sampling

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

.claude/memory/project_ps_editor.md

@@ -4,39 +4,44 @@ description: Runtime editor plugin for UE 5.5 - object placement, scene editing,
 type: project
 ---
 
-PS_Editor is a runtime editor plugin for Unreal Engine 5.5 that will be integrated into the PROSERVE project.
-
-**Why:** Enable runtime scene editing in packaged builds - place objects, configure properties, define scenarios, manipulate splines, modify lighting, and save/load scenes as JSON.
+PS_Editor is a runtime editor plugin for Unreal Engine 5.5 for the PROSERVE project.
 
 Key decisions:
 - UI: UMG driven by C++ (Slate)
-- Gizmos: Custom actor with BasicShapes + unlit material (InteractiveToolsFramework is editor-only)
-- Serialization: JSON via Json/JsonUtilities modules (future)
+- Gizmos: Custom actor with BasicShapes + unlit material (ITF is editor-only)
+- Serialization: JSON via Json/JsonUtilities (FJsonObjectConverter)
 - Naming: PS_Editor_ prefix on all files/classes
 - Plugin path: Unreal/Plugins/PS_Editor/
-- AZERTY keyboard layout: arrows + A/Q for movement, E/R/T for modes
+- AZERTY keyboard: arrows + A/Q for movement, E/R/T for modes
 
 ## Completed Phases
 
 ### Phase 1 - GameMode + Camera
-- PS_Editor_GameMode, PS_Editor_Pawn, PS_Editor_PlayerController, PS_Editor_HUD
 - Camera: Fly (RMB), Pan (LMB drag), Orbit (Alt+LMB / MMB)
 - Movement: arrows + A (up) / Q (down)
 
 ### Phase 2 - Selection + Transform + Undo
-- SelectionManager: raycast click-to-select, Ctrl+click multi-select, Movable actors only
-- Gizmo: custom actor with colored arrows (R/G/B), cones, SDPG_Foreground, constant screen size
+- Click-to-select (Movable actors only), Ctrl+click multi-select
+- Custom gizmo (R/G/B arrows + cones, SDPG_Foreground, constant screen size)
 - Translate/Rotate/Scale via gizmo drag, hotkeys E/R/T
-- Snap to ground (End key), soft-delete (Delete key)
-- Undo/Redo system: custom UndoManager, Ctrl+Z / Ctrl+Y, 50 action stack
-- Properties panel: editable Location/Rotation/Scale fields
-- Toolbar: mode buttons + snap ground
-- Material: M_PS_Editor_Gizmo (Unlit, Vector Parameter "Color" → Emissive, Translucent, Disable Depth Test)
+- Snap to ground (End), soft-delete (Delete + confirmation dialog)
+- Undo/Redo (Ctrl+Z/Y, 50 action stack)
+- Properties panel + toolbar UI
+- Material: M_PS_Editor_Gizmo (Unlit, "Color" param, Translucent, Disable Depth Test)
 
-## Next: Phase 3 - Object Spawning
-- Catalog/list of objects to place
-- Drag & drop or click to spawn
-- Duplication of existing objects
+### Phase 3 - Object Spawning
+- SpawnableComponent: marker on BPs (name, category, thumbnail)
+- SpawnCatalog DataAsset + Factory for easy creation
+- SpawnManager: spawns in front of camera, tracks all spawned actors
+- Catalogue UI: thumbnail cards, click to spawn, grouped by category
+- CaptureAllThumbnails on DataAsset: auto-generates from UE thumbnails
+- Spawn undo/redo, auto-deselect hidden actors
 
-## Next: Phase 4 - JSON Serialization
-- Save/load scenes as JSON
+### Phase 4 - JSON Serialization
+- SceneData USTRUCT (Version, SceneName, Timestamp, Actors[ClassPath, Location, Rotation, Scale])
+- SceneSerializer: Save/Load/Clear/GetSavedSceneNames
+- Files in Saved/PS_Editor/Scenes/{name}.json
+- UI: Save field + button, New Scene, saved scenes list with click-to-load
+
+## Next: Phase 5 - Advanced Editing
+- Splines, lighting, AI characters, property editing