UI: 앱 아이콘 교체 + Placement 힌트 텍스트 정리

- 앱 아이콘: 방광이.png로 교체 (webp→png, adaptive-icon 제거)
- Placement: "Centering" → "Checking", "LR balanced. Final check" → "Final check"
- 모든 방향 힌트에 화살표(↑↓←→) 추가 — phaseProtected 시 아이콘 추론 보장
- 디바운스 중에도 directionIcon은 최신 guideResult로 갱신 (화살표 누락 수정)

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

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

@@ -226,7 +226,7 @@ fun PlacementGuideView(appState: AppState) {
                 val hint = directionHint.ifEmpty { " " }
                 append(hint)
                 if (hint.startsWith("Slide") || hint.startsWith("Optimizing") ||
-                    hint.startsWith("Centering") || hint.startsWith("Adjust")) {
+                    hint.startsWith("Checking") || hint.startsWith("Adjust")) {
                     append(dots)
                 }
                 if (appState.isDevMode && !lastCv.isNaN()) {
@@ -685,7 +685,17 @@ fun PlacementGuideView(appState: AppState) {
                         } else if (phaseProtected && phaseHoldHint.isNotEmpty()) {
                             // 보호 중 → 전환 힌트 강제 유지, lastHintChangeMs 안 건드림
                             directionHint = phaseHoldHint
-                            directionIcon = "checkmark.circle"
+                            // 힌트 텍스트에서 방향 아이콘 추론 (화살표 유지)
+                            directionIcon = when {
+                                phaseHoldHint.contains("up", ignoreCase = true) || phaseHoldHint.contains("↑") -> "arrow.up"
+                                phaseHoldHint.contains("down", ignoreCase = true) || phaseHoldHint.contains("↓") -> "arrow.down"
+                                phaseHoldHint.contains("left", ignoreCase = true) || phaseHoldHint.contains("←") -> "arrow.left"
+                                phaseHoldHint.contains("right", ignoreCase = true) || phaseHoldHint.contains("→") -> "arrow.right"
+                                else -> "checkmark.circle"
+                            }
+                        } else {
+                            // 디바운스 중이라도 화살표 방향은 최신 상태로 갱신
+                            directionIcon = guideResult.icon
                         }
 
                         // GREEN hold 중이면 힌트 강제 유지
@@ -1234,7 +1244,7 @@ private fun computePlacementGuide(
     val detectedCount = detected.count { it }
 
     if (detectedCount == 0) {
-        return PlacementGuideResult("Slide up", "arrow.up", 0,
+        return PlacementGuideResult("Slide up ↑", "arrow.up", 0,
             phase = PlacementPhase.VERTICAL, nextPhase = PlacementPhase.VERTICAL)
     }
 
@@ -1292,7 +1302,7 @@ private fun computePlacementGuide(
                             val lrHint = when {
                                 l4 > 0 && l5 > 0 && l4 > l5 -> "Slide left ←"
                                 l4 > 0 && l5 > 0 && l5 > l4 -> "Slide right →"
-                                else -> "Centering"
+                                else -> "Checking"
                             }
                             val lrIcon = when {
                                 l4 > 0 && l5 > 0 && l4 > l5 -> "arrow.left"
@@ -1328,13 +1338,13 @@ private fun computePlacementGuide(
             val hint: String; val icon: String
             when {
                 (ch0det || ch1det) && !ch2det && !ch3det -> {
-                    hint = "Slide up"; icon = "arrow.up"
+                    hint = "Slide up ↑"; icon = "arrow.up"
                 }
                 (ch3det || ch2det) && !ch0det && !ch1det -> {
-                    hint = "Slide down"; icon = "arrow.down"
+                    hint = "Slide down ↓"; icon = "arrow.down"
                 }
                 else -> {
-                    hint = "Slide up"; icon = "arrow.up"
+                    hint = "Slide up ↑"; icon = "arrow.up"
                 }
             }
             return PlacementGuideResult(hint, icon, centerDetected * 10,
@@ -1379,7 +1389,7 @@ private fun computePlacementGuide(
             val ch5ok = detected.getOrElse(5) { false }
 
             // 항상 LATERAL 단계를 거침 — 전환 시 항상 Checking 표시
-            val lrHint = "Centering"
+            val lrHint = "Checking"
             val lrIcon = "checkmark.circle"
             val score = (40 + ((1.0 - kotlin.math.abs(gradient) / gradientThr) * 20).toInt())
                 .coerceIn(40, 60)
@@ -1396,16 +1406,16 @@ private fun computePlacementGuide(
             val ch4ok = detected.getOrElse(4) { false }
             val ch5ok = detected.getOrElse(5) { false }
             // 항상 LATERAL 단계를 거침
-            return PlacementGuideResult("Centering",
+            return PlacementGuideResult("Checking",
                 "checkmark.circle", 50,
                 phase = PlacementPhase.VERTICAL, nextPhase = PlacementPhase.LATERAL)
         } else if (gradient > 0) {
-            val intensity = if (gradient > 0.8) "Slide down" else "Slide down slightly"
+            val intensity = if (gradient > 0.8) "Slide down ↓" else "Slide down slightly ↓"
             return PlacementGuideResult(intensity, "arrow.down",
                 (20 + centerDetected * 5).coerceAtMost(35),
                 phase = PlacementPhase.VERTICAL, nextPhase = PlacementPhase.VERTICAL)
         } else {
-            val intensity = if (gradient < -0.8) "Slide up" else "Slide up slightly"
+            val intensity = if (gradient < -0.8) "Slide up ↑" else "Slide up slightly ↑"
             return PlacementGuideResult(intensity, "arrow.up",
                 (20 + centerDetected * 5).coerceAtMost(35),
                 phase = PlacementPhase.VERTICAL, nextPhase = PlacementPhase.VERTICAL)
@@ -1428,7 +1438,7 @@ private fun computePlacementGuide(
         // 절대 차이 10 sample 이하 → 좌우 충분히 균등, 바로 GREEN
         if (ch4det && ch5det && kotlin.math.abs(len4 - len5) <= 10) {
             return PlacementGuideResult(
-                "LR balanced. Final check...",
+                "Final check...",
                 "checkmark.circle", 60,
                 phase = PlacementPhase.LATERAL, nextPhase = PlacementPhase.GREEN)
         }
@@ -1582,10 +1592,10 @@ private fun computePlacementGuide(
                 adjustHint = "Slide right →"; adjustIcon = "arrow.right"
             }
             gradient > 0.3 -> {
-                adjustHint = "Slide down"; adjustIcon = "arrow.down"
+                adjustHint = "Slide down ↓"; adjustIcon = "arrow.down"
             }
             gradient < -0.3 -> {
-                adjustHint = "Slide up"; adjustIcon = "arrow.up"
+                adjustHint = "Slide up ↑"; adjustIcon = "arrow.up"
             }
             else -> {
                 // 방향 애매 + CV 미달 → ch별 len 분석으로 방향 제시
@@ -1596,10 +1606,10 @@ private fun computePlacementGuide(
                     // 최소 채널이 최대의 60% 미만 → 약한 쪽으로 안내
                     if (minCh <= 1) {
                         // ch0/ch1 약함 → 위로
-                        adjustHint = "Slide up slightly"; adjustIcon = "arrow.up"
+                        adjustHint = "Slide up slightly ↑"; adjustIcon = "arrow.up"
                     } else {
                         // ch2/ch3 약함 → 아래로
-                        adjustHint = "Slide down slightly"; adjustIcon = "arrow.down"
+                        adjustHint = "Slide down slightly ↓"; adjustIcon = "arrow.down"
                     }
                 } else {
                     adjustHint = "Optimizing"; adjustIcon = "checkmark.circle"

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_monochrome" />
-</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-    <monochrome android:drawable="@drawable/ic_launcher_monochrome" />
-</adaptive-icon>