Fix perception, patrol, and spline following for PS_AI_Behavior

Perception:
- Configure senses in BeginPlay + RequestStimuliListenerUpdate (not constructor)
- Filter threats by team attitude: only Hostile actors generate threat
- Skip Friendly and Neutral actors in CalculateThreatLevel and GetHighestThreatActor
- All Hostile actors are valid threats regardless of TargetPriority list

Blackboard:
- Use SetValueAsEnum/GetValueAsEnum for BehaviorState key (was Int)

Patrol:
- Auto NavMesh patrol when no manual waypoints defined
- Project HomeLocation onto NavMesh before searching random points
- Fallback to NPC current position if HomeLocation not on NavMesh

Spline following:
- Choose direction based on NPC forward vector vs spline tangent (not longest distance)
- Skip re-search if already following a spline (prevent BT re-boucle)
- Reverse at end: wait for NPC to catch up before inverting direction
- Use NPC actual CharacterMovement speed for target point advancement
- Face toward target point (not spline tangent) to prevent crab-walking in turns
- Junction switching: direction continuity check, 70% switch chance, world gap tolerance
- Debug draw: green sphere (target), yellow line (gap), cyan arrow (tangent), text overlay
- Add GetWorldDirectionAtDistance to SplinePath

Editor:
- Add Placeable to SplinePath and CoverPoint UCLASS
- Add PersonalityProfileFactory for Data Asset creation
- Add EnsureBlackboardAsset declaration

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

Build_Plugin.bat

@@ -0,0 +1,65 @@
+@echo off
+setlocal
+
+:: ─── Configuration ──────────────────────────────────────────────────────────
+set UE_ROOT=C:\Program Files\Epic Games\UE_5.5
+set UPROJECT=E:\ASTERION\GIT\PS_AI_Agent\Unreal\PS_AI_Agent\PS_AI_Agent.uproject
+set PLATFORM=Win64
+set CONFIG=Development
+set TARGET=PS_AI_AgentEditor
+
+:: ─── Colors ─────────────────────────────────────────────────────────────────
+set GREEN=[92m
+set RED=[91m
+set YELLOW=[93m
+set RESET=[0m
+
+:: ─── Banner ─────────────────────────────────────────────────────────────────
+echo.
+echo %GREEN%============================================%RESET%
+echo   PS_AI_Agent - Plugin Build
+echo   Target: %TARGET% %PLATFORM% %CONFIG%
+echo %GREEN%============================================%RESET%
+echo.
+
+:: ─── Verify paths ───────────────────────────────────────────────────────────
+if not exist "%UE_ROOT%\Engine\Binaries\ThirdParty\DotNet\8.0.300\win-x64\dotnet.exe" (
+    echo %RED%ERROR: UE5.5 dotnet not found at %UE_ROOT%%RESET%
+    echo Check UE_ROOT path in this script.
+    pause
+    exit /b 1
+)
+
+if not exist "%UPROJECT%" (
+    echo %RED%ERROR: .uproject not found: %UPROJECT%%RESET%
+    pause
+    exit /b 1
+)
+
+:: ─── Build ──────────────────────────────────────────────────────────────────
+echo %YELLOW%Building %TARGET% (%CONFIG%)...%RESET%
+echo.
+
+"%UE_ROOT%\Engine\Binaries\ThirdParty\DotNet\8.0.300\win-x64\dotnet.exe" ^
+    "%UE_ROOT%\Engine\Binaries\DotNET\UnrealBuildTool\UnrealBuildTool.dll" ^
+    %TARGET% %PLATFORM% %CONFIG% ^
+    -Project="%UPROJECT%" ^
+    -WaitMutex ^
+    -FromMsBuild
+
+set BUILD_EXIT=%ERRORLEVEL%
+
+echo.
+if %BUILD_EXIT% EQU 0 (
+    echo %GREEN%============================================%RESET%
+    echo   BUILD SUCCEEDED
+    echo %GREEN%============================================%RESET%
+) else (
+    echo %RED%============================================%RESET%
+    echo   BUILD FAILED  (exit code: %BUILD_EXIT%)
+    echo %RED%============================================%RESET%
+)
+
+echo.
+pause
+exit /b %BUILD_EXIT%