feat(clothing): tee, jeans and shoes as separate skinned meshes

Follows the character-artist clothing workflow literally: duplicate the body's own
faces for the garment base, solidify for cloth thickness, and keep each piece a
separate mesh. Attached as leader-pose components beside the hair, so no second rig.

- Tools/character_clothing_build.py builds three garments from the body mesh, trimmed
  geometrically (height band plus a width limit) instead of by dominant bone: the bone
  filter left holes wherever a face's strongest bone was outside the allowed list.
- Tools/ue_character_clothing_import.py imports them as CharacterTee / CharacterJeans /
  CharacterShoes, each arriving with its own single material slot.
- The pawn attaches all three, hidden with the body in first person.

Three traps recorded in MEMORY.md, each of which cost a build: MPFB weights its helper
geometry to groups that dominate every vertex, Blender refuses to apply a modifier to a
mesh with shape keys, and object-mode polygon selection is discarded on entering edit
mode - the delete wiped the whole garment.

Known defects, in TODO.md: the garments have coverage holes at shoulders, hips and
knees, and the hair reads light and wispy since its material was repointed to the
masked strand sheet.

Game/GigLine/Source/GigLine/GigLineCharacter.cpp

@@ -117,6 +117,30 @@ AGigLineCharacter::AGigLineCharacter()
 		HairMesh->SetLeaderPoseComponent(GetMesh());
 	}
 
+	// Garments: tee, jeans, shoes. Each is its own mesh with its own single material,
+	// attached to the capsule and posed from the body so there is no second rig.
+	static const TCHAR* GarmentPaths[] = {
+		TEXT("/Game/Test/Character/CharacterTee.CharacterTee"),
+		TEXT("/Game/Test/Character/CharacterJeans.CharacterJeans"),
+		TEXT("/Game/Test/Character/CharacterShoes.CharacterShoes"),
+	};
+	for (const TCHAR* Path : GarmentPaths)
+	{
+		USkeletalMeshComponent* Piece = CreateDefaultSubobject<USkeletalMeshComponent>(
+			FName(*FString::Printf(TEXT("Cloth_%s"), *FPaths::GetBaseFilename(Path))));
+		Piece->SetupAttachment(GetCapsuleComponent());
+		Piece->SetCollisionEnabled(ECollisionEnabled::NoCollision);
+		Piece->SetHiddenInGame(true);
+		Piece->SetRelativeLocation(FVector(0.0f, 0.0f, -87.5f));
+		Piece->SetRelativeRotation(FRotator(0.0f, -90.0f, 0.0f));
+		if (USkeletalMesh* Mesh = LoadObject<USkeletalMesh>(nullptr, Path))
+		{
+			Piece->SetSkeletalMesh(Mesh);
+			Piece->SetLeaderPoseComponent(GetMesh());
+		}
+		Clothing.Add(Piece);
+	}
+
 	// Third-person boom. bDoCollisionTest is the camera-collision feature: the arm
 	// shortens when something is between the pivot and the desired camera position.
 	ThirdPersonArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("ThirdPersonArm"));
@@ -826,6 +850,13 @@ void AGigLineCharacter::ToggleCamera()
 	{
 		HairMesh->SetHiddenInGame(!bThirdPerson);
 	}
+	for (USkeletalMeshComponent* Piece : Clothing)
+	{
+		if (Piece)
+		{
+			Piece->SetHiddenInGame(!bThirdPerson);
+		}
+	}
 	if (bThirdPerson)
 	{
 		UpdateBodyAnimation();

Game/GigLine/Source/GigLine/GigLineCharacter.h

@@ -166,6 +166,16 @@ protected:
 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Body")
 	TObjectPtr<USkeletalMeshComponent> HairMesh;
 
+	/**
+	 * Garments, each its own skeletal mesh on a leader pose component.
+	 *
+	 * The character-artist skill keeps clothing separate so a piece can be swapped or
+	 * re-materialled on its own; it also sidesteps the material-slot collapse that
+	 * makes joined multi-material meshes arrive with one slot.
+	 */
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Body")
+	TArray<TObjectPtr<USkeletalMeshComponent>> Clothing;
+
 	UPROPERTY()
 	TObjectPtr<UAnimSequence> IdleAnimation;