refactor: placement body PNG → Canvas 실루엣 (CKLaw Bezier torso)

placement_body.png 제거, CKLaw BladderSeekScreen의 해부학적
Canvas 실루엣으로 교체 (갈비뼈, 배꼽, 치골 아치, hourglass torso).
sensor_device.png는 유지. 센서 위치 방광 타원 안쪽으로 조정.

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

app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt

@@ -149,7 +149,7 @@ fun PlacementGuideView(appState: AppState) {
                 .padding(horizontal = 24.dp),
             horizontalAlignment = Alignment.CenterHorizontally
         ) {
-            // ── 하복부 이미지 + 센서 + 방향 가이드 ──
+            // ── 하복부 Canvas 실루엣 + 센서 + 방향 가이드 ──
             Box(
                 modifier = Modifier
                     .fillMaxWidth()
@@ -157,50 +157,129 @@ fun PlacementGuideView(appState: AppState) {
                     .padding(top = 8.dp),
                 contentAlignment = Alignment.Center
             ) {
-                // 배경 이미지 (하복부 실루엣)
+                // 하복부 실루엣 (Canvas — CKLaw body silhouette)
-                androidx.compose.foundation.Image(
+                val bodyAlpha = if (isGreenZone) 0.6f else 0.9f
-                    painter = androidx.compose.ui.res.painterResource(com.example.medilightv2android.R.drawable.placement_body),
-                    contentDescription = "Body",
-                    modifier = Modifier.fillMaxSize(),
-                    contentScale = androidx.compose.ui.layout.ContentScale.Fit,
-                    alpha = if (isGreenZone) 0.6f else 0.9f
-                )
-
-                // 오버레이: 방광 + 센서 + 화살표
                 Canvas(modifier = Modifier.fillMaxSize()) {
                     val w = size.width
                     val h = size.height
                     val cx = w / 2f
                     val greenZone = isGreenZone
 
-                    // 방광 위치 (이미지의 배꼽~치골 사이)
+                    // Body silhouette palette
-                    val bladderRy = h * 0.05f
+                    val skinFill = Color(0xFFF2C5A0).copy(alpha = bodyAlpha)
-                    val bladderRx = w * 0.12f
+                    val skinStroke = Color(0xFFBF947A).copy(alpha = bodyAlpha)
-                    val bladderCy = h * 0.48f + bladderRy  // 위쪽 경계 고정
+                    val skinShade = Color(0xFF8E6647).copy(alpha = bodyAlpha)
+                    val navelInk = Color(0xFF5A3D26).copy(alpha = bodyAlpha)
+
+                    // ── Anatomical landmarks (vertical %) ──
+                    val chestY = h * 0.06f
+                    val waistY = h * 0.42f
+                    val hipY = h * 0.76f
+                    val pubisY = h * 0.96f
+                    val chestW = w * 0.42f
+                    val waistW = w * 0.32f
+                    val hipW = w * 0.46f
+
+                    // ── Torso silhouette — hourglass via cubic bezier ──
+                    val bodyPath = Path().apply {
+                        moveTo(cx - chestW, chestY)
+                        cubicTo(
+                            cx - chestW * 1.05f, chestY + (waistY - chestY) * 0.45f,
+                            cx - waistW * 1.05f, waistY - (waistY - chestY) * 0.20f,
+                            cx - waistW, waistY)
+                        cubicTo(
+                            cx - waistW * 0.98f, waistY + (hipY - waistY) * 0.35f,
+                            cx - hipW * 0.95f, hipY - (hipY - waistY) * 0.20f,
+                            cx - hipW, hipY)
+                        cubicTo(
+                            cx - hipW * 0.92f, hipY + (pubisY - hipY) * 0.55f,
+                            cx - hipW * 0.45f, pubisY,
+                            cx, pubisY)
+                        cubicTo(
+                            cx + hipW * 0.45f, pubisY,
+                            cx + hipW * 0.92f, hipY + (pubisY - hipY) * 0.55f,
+                            cx + hipW, hipY)
+                        cubicTo(
+                            cx + hipW * 0.95f, hipY - (hipY - waistY) * 0.20f,
+                            cx + waistW * 0.98f, waistY + (hipY - waistY) * 0.35f,
+                            cx + waistW, waistY)
+                        cubicTo(
+                            cx + waistW * 1.05f, waistY - (waistY - chestY) * 0.20f,
+                            cx + chestW * 1.05f, chestY + (waistY - chestY) * 0.45f,
+                            cx + chestW, chestY)
+                        close()
+                    }
+                    drawPath(bodyPath, skinFill)
+                    drawPath(bodyPath, skinStroke, style = Stroke(width = 1.6f))
+
+                    // ── Costal margin (갈비뼈 라인) ──
+                    val ribY = chestY + h * 0.10f
+                    val ribPathL = Path().apply {
+                        moveTo(cx - chestW * 0.85f, chestY + h * 0.04f)
+                        cubicTo(
+                            cx - chestW * 0.55f, chestY + h * 0.13f,
+                            cx - chestW * 0.20f, chestY + h * 0.13f,
+                            cx, ribY)
+                    }
+                    val ribPathR = Path().apply {
+                        moveTo(cx + chestW * 0.85f, chestY + h * 0.04f)
+                        cubicTo(
+                            cx + chestW * 0.55f, chestY + h * 0.13f,
+                            cx + chestW * 0.20f, chestY + h * 0.13f,
+                            cx, ribY)
+                    }
+                    drawPath(ribPathL, skinShade.copy(alpha = 0.55f * bodyAlpha),
+                        style = Stroke(width = 1.2f))
+                    drawPath(ribPathR, skinShade.copy(alpha = 0.55f * bodyAlpha),
+                        style = Stroke(width = 1.2f))
+
+                    // ── Linea alba (복부 정중선) ──
+                    val navelY = waistY + (hipY - waistY) * 0.20f
+                    drawLine(skinShade.copy(alpha = 0.30f * bodyAlpha),
+                        Offset(cx, ribY + 4f), Offset(cx, navelY - 6f),
+                        strokeWidth = 1.0f)
+
+                    // ── Navel (배꼽) ──
+                    drawCircle(navelInk, 3.5f, Offset(cx, navelY))
+                    drawCircle(skinShade.copy(alpha = 0.4f * bodyAlpha), 5.5f, Offset(cx, navelY),
+                        style = Stroke(width = 0.8f))
+
+                    // ── Pubic arch (치골 아치) ──
+                    val archY = pubisY - h * 0.04f
+                    val archPath = Path().apply {
+                        moveTo(cx - hipW * 0.30f, archY)
+                        cubicTo(
+                            cx - hipW * 0.10f, archY + h * 0.025f,
+                            cx + hipW * 0.10f, archY + h * 0.025f,
+                            cx + hipW * 0.30f, archY)
+                    }
+                    drawPath(archPath, skinShade.copy(alpha = 0.45f * bodyAlpha),
+                        style = Stroke(width = 1.4f))
+
+                    // ── 방광 타원 (배꼽~치골 사이) ──
+                    val bladderCy = (navelY + pubisY) / 2f
+                    val bladderRx = hipW * 0.42f
+                    val bladderRy = bladderRx * 0.70f
+                    val ovalColor = if (greenZone) Color(0xFF4CAF50) else Color.Cyan
                     drawOval(
-                        color = if (greenZone) Color(0xFF4CAF50).copy(alpha = 0.15f) else Color.Cyan.copy(alpha = 0.12f),
+                        color = ovalColor.copy(alpha = 0.12f),
                         topLeft = Offset(cx - bladderRx, bladderCy - bladderRy),
                         size = Size(bladderRx * 2, bladderRy * 2)
                     )
                     drawOval(
-                        color = if (greenZone) Color(0xFF4CAF50).copy(alpha = 0.4f) else Color.Cyan.copy(alpha = 0.35f),
+                        color = ovalColor.copy(alpha = 0.4f),
                         topLeft = Offset(cx - bladderRx, bladderCy - bladderRy),
                         size = Size(bladderRx * 2, bladderRy * 2),
                         style = Stroke(width = 1.5f, pathEffect = PathEffect.dashPathEffect(floatArrayOf(6f, 4f)))
                     )
 
-                    // 센서 위치 계산 (이미지 오버레이용)
+                    // ── 방향 화살표 (방광 타원 바깥) ──
-                    val sensorW = 80f
-                    val sensorH = 50f
-                    val sensorY = bladderCy - sensorH / 2
-
-                    // ── 방향 화살표 (타원 바깥에 크게) ──
                     if (!greenZone) {
                         val arrowColor = Color(0xFFFF5722)
                         val arrowLen = 50f
                         val arrowHead = 20f
                         val sw = 7f
-                        val gap = 12f  // 타원 경계에서 간격
+                        val gap = 12f
 
                         when {
                             directionIcon.contains("up") -> {
@@ -230,14 +309,14 @@ fun PlacementGuideView(appState: AppState) {
                         }
                     }
 
-                    // Green 체크마크
+                    // ── Green 체크마크 ──
                     if (greenZone) {
-                        drawCircle(Color(0xFF4CAF50).copy(alpha = 0.2f), radius = 35f, center = Offset(cx, sensorY - 30f))
+                        val checkCy = bladderCy - bladderRy - 40f
-                        // ✓ 모양
+                        drawCircle(Color(0xFF4CAF50).copy(alpha = 0.2f), radius = 35f, center = Offset(cx, checkCy))
                         val checkPath = Path().apply {
-                            moveTo(cx - 15f, sensorY - 30f)
+                            moveTo(cx - 15f, checkCy)
-                            lineTo(cx - 5f, sensorY - 20f)
+                            lineTo(cx - 5f, checkCy + 10f)
-                            lineTo(cx + 15f, sensorY - 42f)
+                            lineTo(cx + 15f, checkCy - 12f)
                         }
                         drawPath(checkPath, Color(0xFF4CAF50), style = Stroke(width = 4f))
                     }
@@ -250,7 +329,7 @@ fun PlacementGuideView(appState: AppState) {
                     modifier = Modifier
                         .size(width = 200.dp, height = 125.dp)
                         .align(Alignment.Center)
-                        .offset(x = 5.dp, y = 20.dp),
+                        .offset(x = 5.dp, y = 115.dp),
                     contentScale = androidx.compose.ui.layout.ContentScale.Fit,
                     alpha = if (isGreenZone) 0.7f else 0.95f
                 )