feat(demo): V2 default + 그래프/문구 일치 + Slider lock (스크롤 충돌 방지)

1. V2 alignment 를 모든 진입점 default 로
   - GreenZoneConstants.alignmentAlgo = V2
   - PlacementGuideView LaunchedEffect 의 clinical 한정 분기 제거 → 항상 V2
   - 사용자 경험 통일 (4-stage Method D)

2. 그래프 ↔ 문구 일치 — 잔여 모순 fix
   - CH3_STABILIZE 의 STOP action: 이전엔 isLocked=true + GREEN LED + checkmark
     아이콘 → '완료처럼 보이는데 알고리즘은 stabilizing 중' 모순. 변경: phase가
     LR_BALANCE 일 때만 finalStop → 진짜 GREEN. CH3_STABILIZE STOP 은 아이콘 X.
   - PROBE_LR action: 이전엔 arrow.left (한쪽 화살표). msg 의 ↔ 와 불일치.
     변경: 아이콘 없음 (msg 의 ↔ 만으로 양방향 의미 전달).

3. LockableSlider 신규 — 스크롤 충돌 차단
   - 잠금 아이콘 1회 탭 → 활성화 → drag 가능 → 다시 탭하면 잠금
   - 잠김 상태에서는 slider disabled → 위아래 스크롤 손가락 끌림에 영향 X
   - 적용: PiezoMonitoring 의 dev panel 17 sliders +
          ReminderSettings 의 2 sliders (배뇨 알림 기간, 기상 알람 기준 시간)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/src/main/java/com/example/medilightv2android/managers/GreenZoneConstants.kt

@@ -26,7 +26,7 @@ object GreenZoneConstants {
     @Volatile var detectionMethod: DetectionMethod = DetectionMethod.METHOD_C
     @Volatile var bvMethod: BvMethod = BvMethod.V41
     @Volatile var placementGuideMode: PlacementGuideMode = PlacementGuideMode.SIMPLE
-    @Volatile var alignmentAlgo: AlignmentAlgo = AlignmentAlgo.V1   // dev 토글 — default V1 (legacy)
+    @Volatile var alignmentAlgo: AlignmentAlgo = AlignmentAlgo.V2   // default V2 (4-stage Method D). V1 은 dev 토글로 fallback.
 
     /** Posture pitch 임계값 (deg). |pitch| > 이 값 → LYING, ≤ 이 값 → NON_LYING. dev 모드에서 조정 가능. */
     @Volatile var pitchLyingThreshold: Float = 25f

app/src/main/java/com/example/medilightv2android/ui/components/LockableSlider.kt

@@ -0,0 +1,77 @@
+/*
+ * LockableSlider — 표준 Material3 Slider 를 잠금 아이콘으로 감싼 wrapper.
+ *
+ * 사용 의도:
+ *   설정 패널 등 ScrollView 안의 슬라이더가 위아래 스크롤 시 손가락 끌림에 의해
+ *   값이 의도치 않게 바뀌는 문제 차단. 사용자가 잠금 아이콘을 1회 탭하여 활성화한
+ *   뒤에만 슬라이더가 반응.
+ *
+ * 동작:
+ *   - 기본 상태: 잠김 (회색 lock 아이콘 + slider disabled)
+ *   - 잠금 아이콘 tap → 활성화 (녹색 lock_open 아이콘 + slider enabled)
+ *   - 다시 tap → 재잠금
+ *   - 잠금 상태에서는 slider drag 무시 → 위아래 스크롤 안전
+ *
+ * UX 톤:
+ *   "1회 터치 후 조정" 패턴 — 의도된 조작만 허용.
+ */
+package com.example.medilightv2android.ui.components
+
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Lock
+import androidx.compose.material.icons.filled.LockOpen
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.Slider
+import androidx.compose.material3.SliderColors
+import androidx.compose.material3.SliderDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun LockableSlider(
+    value: Float,
+    onValueChange: (Float) -> Unit,
+    modifier: Modifier = Modifier,
+    valueRange: ClosedFloatingPointRange<Float> = 0f..1f,
+    steps: Int = 0,
+    onValueChangeFinished: (() -> Unit)? = null,
+    colors: SliderColors = SliderDefaults.colors(),
+) {
+    var unlocked by remember { mutableStateOf(false) }
+    Row(verticalAlignment = Alignment.CenterVertically, modifier = modifier) {
+        IconButton(
+            onClick = { unlocked = !unlocked },
+            modifier = Modifier.size(32.dp)
+        ) {
+            Icon(
+                if (unlocked) Icons.Default.LockOpen else Icons.Default.Lock,
+                contentDescription = if (unlocked) "잠금 해제됨 — 다시 탭하여 잠금" else "잠김 — 탭하여 해제 후 조정",
+                tint = if (unlocked) Color(0xFF4CAF50) else Color.Gray.copy(alpha = 0.5f),
+                modifier = Modifier.size(18.dp)
+            )
+        }
+        Spacer(modifier = Modifier.width(4.dp))
+        Slider(
+            value = value,
+            onValueChange = if (unlocked) onValueChange else { _ -> },
+            onValueChangeFinished = onValueChangeFinished,
+            valueRange = valueRange,
+            steps = steps,
+            colors = colors,
+            enabled = unlocked,
+            modifier = Modifier.weight(1f)
+        )
+    }
+}

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

@@ -55,6 +55,7 @@ import com.example.medilightv2android.models.UrgencyLevel
 import com.example.medilightv2android.services.ScanLogStore
 import com.example.medilightv2android.ui.components.BladdyRiveView
 import com.example.medilightv2android.ui.components.DonutChartView
+import com.example.medilightv2android.ui.components.LockableSlider
 import com.example.medilightv2android.ui.components.ScanLogDialog
 import com.example.medilightv2android.R
 import com.example.medilightv2android.ui.theme.*
@@ -1651,7 +1652,7 @@ fun PiezoMonitoringView(appState: AppState) {
                         Spacer(modifier = Modifier.weight(1f))
                         Text("${appState.piezoSettings.maxVolume} mL", fontSize = labelSize, fontWeight = FontWeight.Bold, color = MlPrimary)
                     }
-                    Slider(
+                    LockableSlider(
                         value = appState.piezoSettings.maxVolume.toFloat(),
                         onValueChange = { appState.piezoSettings = appState.piezoSettings.copy(maxVolume = it.toInt()) },
                         valueRange = 200f..800f,
@@ -1696,7 +1697,7 @@ fun PiezoMonitoringView(appState: AppState) {
                         Spacer(modifier = Modifier.weight(1f))
                         Text("Level ${appState.bladderLevel.catheterizationThreshold}", fontSize = labelSize, fontWeight = FontWeight.Bold, color = MlPrimary)
                     }
-                    Slider(
+                    LockableSlider(
                         value = appState.bladderLevel.catheterizationThreshold.toFloat(),
                         onValueChange = { appState.updateCatheterizationThreshold(it.toInt()) },
                         valueRange = 1f..10f,
@@ -1743,7 +1744,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             }
                         }
                     }
-                    Slider(
+                    LockableSlider(
                         value = valueClamped.toFloat(),
                         onValueChange = {
                             val snapped = ((it * 2).roundToInt() / 2.0).coerceIn(0.5, 10.0)
@@ -1779,7 +1780,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             )
                         }
                         if (!otsuEnabled) {
-                            Slider(
+                            LockableSlider(
                                 value = currentThreshold,
                                 onValueChange = { currentThreshold = it; GreenZoneConstants.lowEchoAmp = it },
                                 valueRange = 800f..2000f,
@@ -1888,7 +1889,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Text("${postMaxVal.toInt()} / 100", fontSize = 13.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                             Spacer(modifier = Modifier.weight(1f))
                         }
-                        Slider(
+                        LockableSlider(
                             value = postMaxVal,
                             onValueChange = { postMaxVal = it; GreenZoneConstants.postMaxIdx = it.toInt() },
                             valueRange = 50f..95f,
@@ -1907,7 +1908,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(modifier = Modifier.weight(1f))
                             Text("|pitch|≤${pitchThrVal.toInt()}°→Lying", fontSize = 11.sp, color = MlSecondaryText)
                         }
-                        Slider(
+                        LockableSlider(
                             value = pitchThrVal,
                             onValueChange = { pitchThrVal = it; GreenZoneConstants.pitchLyingThreshold = it
                                 com.example.medilightv2android.services.PostureTuningPrefs.saveAll(context) },
@@ -1956,7 +1957,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(modifier = Modifier.weight(1f))
                             Text("이상 lying 후 일어나면 알람", fontSize = 10.sp, color = MlSecondaryText)
                         }
-                        Slider(
+                        LockableSlider(
                             value = lyingDurVal,
                             onValueChange = {
                                 lyingDurVal = it
@@ -1981,7 +1982,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(modifier = Modifier.weight(1f))
                             Text("자세 갱신 주기", fontSize = 10.sp, color = MlSecondaryText)
                         }
-                        Slider(
+                        LockableSlider(
                             value = pollIntervalVal,
                             onValueChange = {
                                 pollIntervalVal = it
@@ -2004,7 +2005,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(Modifier.weight(1f))
                             Text("${walkPitchVal.toInt()}°", fontSize = 12.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(value = walkPitchVal, onValueChange = {
+                        LockableSlider(value = walkPitchVal, onValueChange = {
                             walkPitchVal = it; GreenZoneConstants.walkingMinPitchDeg = it
                             com.example.medilightv2android.services.PostureTuningPrefs.saveAll(context)
                         }, valueRange = 20f..70f, colors = SliderDefaults.colors(thumbColor = MlPrimary, activeTrackColor = MlPrimary))
@@ -2015,7 +2016,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(Modifier.weight(1f))
                             Text("%.1f".format(walkStartWmean), fontSize = 12.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(value = walkStartWmean, onValueChange = {
+                        LockableSlider(value = walkStartWmean, onValueChange = {
                             walkStartWmean = it; GreenZoneConstants.walkingStartWmean = it
                             com.example.medilightv2android.services.PostureTuningPrefs.saveAll(context)
                         }, valueRange = 1f..30f, colors = SliderDefaults.colors(thumbColor = MlPrimary, activeTrackColor = MlPrimary))
@@ -2026,7 +2027,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(Modifier.weight(1f))
                             Text("%.1f".format(walkStartWstd), fontSize = 12.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(value = walkStartWstd, onValueChange = {
+                        LockableSlider(value = walkStartWstd, onValueChange = {
                             walkStartWstd = it; GreenZoneConstants.walkingStartWstd = it
                             com.example.medilightv2android.services.PostureTuningPrefs.saveAll(context)
                         }, valueRange = 0.5f..10f, colors = SliderDefaults.colors(thumbColor = MlPrimary, activeTrackColor = MlPrimary))
@@ -2037,7 +2038,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(Modifier.weight(1f))
                             Text("%.1f".format(walkKeepWmean), fontSize = 12.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(value = walkKeepWmean, onValueChange = {
+                        LockableSlider(value = walkKeepWmean, onValueChange = {
                             walkKeepWmean = it; GreenZoneConstants.walkingKeepWmean = it
                             com.example.medilightv2android.services.PostureTuningPrefs.saveAll(context)
                         }, valueRange = 0.5f..30f, colors = SliderDefaults.colors(thumbColor = MlPrimary, activeTrackColor = MlPrimary))
@@ -2049,7 +2050,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(Modifier.weight(1f))
                             Text("%.1f초".format(walkStartHold), fontSize = 12.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(value = walkStartHold, onValueChange = {
+                        LockableSlider(value = walkStartHold, onValueChange = {
                             walkStartHold = it; GreenZoneConstants.walkingStartHoldMs = (it * 1000).toLong()
                             com.example.medilightv2android.services.PostureTuningPrefs.saveAll(context)
                         }, valueRange = 0.5f..10f, colors = SliderDefaults.colors(thumbColor = MlPrimary, activeTrackColor = MlPrimary))
@@ -2060,7 +2061,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(Modifier.weight(1f))
                             Text("%.1f초".format(walkKeepHold), fontSize = 12.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(value = walkKeepHold, onValueChange = {
+                        LockableSlider(value = walkKeepHold, onValueChange = {
                             walkKeepHold = it; GreenZoneConstants.walkingKeepHoldMs = (it * 1000).toLong()
                             com.example.medilightv2android.services.PostureTuningPrefs.saveAll(context)
                         }, valueRange = 0.5f..10f, colors = SliderDefaults.colors(thumbColor = MlPrimary, activeTrackColor = MlPrimary))
@@ -2071,7 +2072,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(Modifier.weight(1f))
                             Text("%.1f초".format(walkWindow), fontSize = 12.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(value = walkWindow, onValueChange = {
+                        LockableSlider(value = walkWindow, onValueChange = {
                             walkWindow = it; GreenZoneConstants.walkingWindowMs = (it * 1000).toLong()
                             com.example.medilightv2android.services.PostureTuningPrefs.saveAll(context)
                         }, valueRange = 0.5f..5f, colors = SliderDefaults.colors(thumbColor = MlPrimary, activeTrackColor = MlPrimary))
@@ -2087,7 +2088,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(Modifier.weight(1f))
                             Text("%.2fg".format(accMagMin), fontSize = 12.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(value = accMagMin, onValueChange = {
+                        LockableSlider(value = accMagMin, onValueChange = {
                             accMagMin = it; GreenZoneConstants.postureAccMagMin = it
                             com.example.medilightv2android.services.PostureTuningPrefs.saveAll(context)
                         }, valueRange = 0.3f..1.0f, colors = SliderDefaults.colors(thumbColor = MlPrimary, activeTrackColor = MlPrimary))
@@ -2098,7 +2099,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             Spacer(Modifier.weight(1f))
                             Text("%.2fg".format(accMagMax), fontSize = 12.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(value = accMagMax, onValueChange = {
+                        LockableSlider(value = accMagMax, onValueChange = {
                             accMagMax = it; GreenZoneConstants.postureAccMagMax = it
                             com.example.medilightv2android.services.PostureTuningPrefs.saveAll(context)
                         }, valueRange = 1.0f..3.0f, colors = SliderDefaults.colors(thumbColor = MlPrimary, activeTrackColor = MlPrimary))

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

@@ -121,16 +121,15 @@ fun PlacementGuideView(appState: AppState) {
     var sweepLastDetected by remember { mutableIntStateOf(0) }
     var sweepEverSawAll by remember { mutableStateOf(false) }
 
-    // 화면 진입 시 전체 상태 리셋. clinical alignment session (placementFromMonitoring=false +
+    // 화면 진입 시 전체 상태 리셋. V2 (4-stage Method D) 를 default 로 사용 — 모든 진입점에서.
-    // 활성 ALIGNMENT 세션) 이면 V2, 그 외 (PiezoMonitoring 에서 진입 / 위저드 진입 / 잔여 세션) 는 항상 V1.
+    // (이전: clinical alignment 만 V2, 그 외 V1 → 사용자 경험 분산. 통일.)
     LaunchedEffect(Unit) {
         val sess = com.example.medilightv2android.services.ClinicalSessionStore.currentSession
         val isClinicalAlign = !appState.placementFromMonitoring &&
             sess != null &&
             sess.mode == com.example.medilightv2android.models.SessionMode.ALIGNMENT
         com.example.medilightv2android.managers.GreenZoneConstants.alignmentAlgo =
-            if (isClinicalAlign) com.example.medilightv2android.managers.AlignmentAlgo.V2
+            com.example.medilightv2android.managers.AlignmentAlgo.V2
-            else com.example.medilightv2android.managers.AlignmentAlgo.V1
         v2Aligner.reset()
         // Clinical alignment session 진입 시 — 자동으로 scan 시작 (Step 0 baseline 캡쳐).
         // waitingForStart 는 true 유지 — 사용자는 여전히 Start 눌러 알고리즘 시작 결정.
@@ -887,18 +886,25 @@ fun PlacementGuideView(appState: AppState) {
                             placementScore = 5
                         } else {
                             directionHint = st.msg
+                            // STOP 액션은 두 경우 — CH3_STABILIZE 의 "위치 유지" (still in progress) vs
+                            // LR_BALANCE 의 "정렬 완료" (truly done). 후자만 finalStop 으로 GREEN lock.
+                            val finalStop = st.action == com.example.medilightv2android.managers.AlignAction.STOP &&
+                                v2Aligner.phase == com.example.medilightv2android.managers.AlignGuide4Stage.Phase4.LR_BALANCE
                             directionIcon = when (st.action) {
                                 com.example.medilightv2android.managers.AlignAction.MOVE_UP -> "arrow.up"
                                 com.example.medilightv2android.managers.AlignAction.MOVE_DOWN -> "arrow.down"
                                 com.example.medilightv2android.managers.AlignAction.MOVE_LEFT -> "arrow.left"
                                 com.example.medilightv2android.managers.AlignAction.MOVE_RIGHT -> "arrow.right"
-                                com.example.medilightv2android.managers.AlignAction.PROBE_LR -> "arrow.left"
+                                com.example.medilightv2android.managers.AlignAction.PROBE_LR -> ""   // ↔ — 한쪽 화살표 안 어울림. msg 의 ↔ 만 표시
-                                com.example.medilightv2android.managers.AlignAction.STOP -> "checkmark.circle"
+                                com.example.medilightv2android.managers.AlignAction.STOP -> if (finalStop) "checkmark.circle" else ""
                                 null -> ""
                             }
-                            placementScore = if (st.action ==
+                            placementScore = when {
-                                com.example.medilightv2android.managers.AlignAction.STOP) 100 else 40
+                                finalStop -> 100
-                            if (st.action == com.example.medilightv2android.managers.AlignAction.STOP) {
+                                st.action == com.example.medilightv2android.managers.AlignAction.STOP -> 60   // CH3_STABILIZE 유지 중
+                                else -> 40
+                            }
+                            if (finalStop) {
                                 if (!isLocked) greenLockedAtMs = System.currentTimeMillis()
                                 isLocked = true
                                 placementPhase = PlacementPhase.GREEN

app/src/main/java/com/example/medilightv2android/ui/views/reminder/ReminderSettingsView.kt

@@ -20,6 +20,7 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.example.medilightv2android.services.ReminderService
+import com.example.medilightv2android.ui.components.LockableSlider
 import com.example.medilightv2android.ui.theme.*
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -137,7 +138,7 @@ fun ReminderSettingsView(onBack: () -> Unit) {
                             Text("시작", fontSize = 13.sp, color = MlSecondaryText, modifier = Modifier.width(40.dp))
                             Text("${startHour}시", fontSize = 18.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(
+                        LockableSlider(
                             value = startHour.toFloat(),
                             onValueChange = {
                                 startHour = it.toInt()
@@ -159,7 +160,7 @@ fun ReminderSettingsView(onBack: () -> Unit) {
                             Text("종료", fontSize = 13.sp, color = MlSecondaryText, modifier = Modifier.width(40.dp))
                             Text("${endHour}시", fontSize = 18.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                         }
-                        Slider(
+                        LockableSlider(
                             value = endHour.toFloat(),
                             onValueChange = {
                                 endHour = it.toInt()