feat(compat): iOS 하한 18.0 인하 — 글라스 버블 머티리얼 폴백·사용자 심볼 안전 렌더·Release 인라이너 크래시 우회

- 배포 타깃 26.0→18.0 (앱·위젯. 워치 10.0 불변)
- RadialNavigationView: glassEffect 계열을 @available(iOS 26) 선언 격리 + 18 머티리얼 원 폴백 (배치·연출 동일)
- DiaryZoomContainer.Coordinator → 비제네릭 톱레벨 DiaryZoomCoordinator + AnyView 소거 (하한 18 Release wholemodule에서 swift-frontend SILPerformanceInliner 무한 재귀 크래시 실측·우회)
- Image(safeSymbol:)/SymbolCompat: 카탈로그의 상위 OS 전용 심볼(18 기준 3개)이 교차 기기에서 빈 아이콘이 되지 않게 사용자 심볼 렌더 48곳+워치 7곳 폴백
- -symbolAuditDump 검증 인자 추가, iOS 18.5 시뮬 QA(빌드·radial 폴백·일기 줌·progressSelfTest 49 ALL PASS)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NNxA172hNDRpDsJ2qztKPf

myApp/HaruDanim/Haru_Danim.xcodeproj/project.pbxproj

@@ -527,7 +527,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 26.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 18.0;
 				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
@@ -584,7 +584,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 26.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 18.0;
 				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
@@ -832,7 +832,7 @@
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = Widgets/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = "하루 다님 위젯";
-				IPHONEOS_DEPLOYMENT_TARGET = 26.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 18.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -858,7 +858,7 @@
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = Widgets/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = "하루 다님 위젯";
-				IPHONEOS_DEPLOYMENT_TARGET = 26.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 18.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",

myApp/HaruDanim/Haru_DanimWatch Watch App/ContentView.swift

@@ -203,7 +203,7 @@ struct WatchActionListView: View {
                     store.run(action)
                 } label: {
                     HStack(spacing: 8) {
-                        Image(systemName: action.symbolName)
+                        Image(safeSymbol: action.symbolName)
                             .font(.system(size: 14, weight: .semibold))
                             .foregroundStyle(.white)
                             .frame(width: 28, height: 28)

myApp/HaruDanim/Haru_DanimWatchWidgets/RateComplications.swift

@@ -116,7 +116,7 @@ struct GoalRateComplicationView: View {
                 case .accessoryRectangular:
                     VStack(alignment: .leading, spacing: 2) {
                         HStack(spacing: 4) {
-                            Image(systemName: entry.symbolName)
+                            Image(safeSymbol: entry.symbolName)
                                 .font(.system(size: 11))
                             Text(title)
                                 .font(.headline)
@@ -130,7 +130,7 @@ struct GoalRateComplicationView: View {
                     }
                 default:
                     Gauge(value: min(max(entry.ratio, 0), 1)) {
-                        Image(systemName: entry.symbolName)
+                        Image(safeSymbol: entry.symbolName)
                     } currentValueLabel: {
                         Text("\(percent)")
                             .font(.system(size: 13, weight: .bold).monospacedDigit())
@@ -261,7 +261,7 @@ struct QuestRateComplicationView: View {
                     // 크기가 큰 패밀리는 하루/주간/월간 세 개를 모두 표기 (스펙 §9.2-3)
                     VStack(alignment: .leading, spacing: 2) {
                         HStack(spacing: 4) {
-                            Image(systemName: quest.symbolName)
+                            Image(safeSymbol: quest.symbolName)
                                 .font(.system(size: 11))
                             Text(quest.name)
                                 .font(.headline)
@@ -306,7 +306,7 @@ struct QuestRateComplicationView: View {
             }
         } else {
             Gauge(value: min(max(quest.ratio(forSpanRaw: entry.spanRaw), 0), 1)) {
-                Image(systemName: quest.symbolName)
+                Image(safeSymbol: quest.symbolName)
             } currentValueLabel: {
                 Text("\(Int((quest.ratio(forSpanRaw: entry.spanRaw) * 100).rounded()))")
                     .font(.system(size: 13, weight: .bold).monospacedDigit())

myApp/HaruDanim/Haru_DanimWatchWidgets/StatusComplication.swift

@@ -114,7 +114,7 @@ struct StatusComplicationView: View {
                 case .accessoryRectangular:
                     VStack(alignment: .leading, spacing: 1) {
                         HStack(spacing: 4) {
-                            Image(systemName: entry.runningSymbol ?? "record.circle")
+                            Image(safeSymbol: entry.runningSymbol ?? "record.circle")
                                 .font(.system(size: 11))
                             Text(name)
                                 .font(.headline)
@@ -136,7 +136,7 @@ struct StatusComplicationView: View {
                     }
                 default:
                     VStack(spacing: 1) {
-                        Image(systemName: entry.runningSymbol ?? "record.circle")
+                        Image(safeSymbol: entry.runningSymbol ?? "record.circle")
                             .font(.system(size: 14, weight: .semibold))
                         if let start = entry.runningStartAt {
                             Text(start, style: .timer)

myApp/HaruDanim/Haru_DanimWatchWidgets/SymbolCompat.swift

@@ -0,0 +1,25 @@
+//
+//  SymbolCompat.swift
+//  Haru_DanimWatchWidgets
+//
+//  사용자 지정 SF 심볼의 안전 렌더 — 워치 하한(watchOS 10)에는 없는 신형 심볼을
+//  아이폰(iOS 26)에서 골라 동기화하면 빈 아이콘이 되는 것을 물음표로 대치한다.
+//  Shared/SymbolCompat.swift(앱·위젯)와 같은 헬퍼의 워치 컴플리케이션 사본 —
+//  폴더 동기화 그룹 멤버십이 갈려 한 파일을 공유할 수 없다.
+//
+
+import SwiftUI
+import UIKit
+
+enum WatchSymbolCompat {
+    static func safe(_ name: String) -> String {
+        UIImage(systemName: name) != nil ? name : "questionmark.circle.fill"
+    }
+}
+
+extension Image {
+    /// 사용자 데이터의 심볼 렌더 전용 — 이 OS에 없는 이름은 물음표로 대치
+    init(safeSymbol name: String) {
+        self.init(systemName: WatchSymbolCompat.safe(name))
+    }
+}

myApp/HaruDanim/IOS/ContentView.swift

@@ -68,6 +68,7 @@ struct ContentView: View {
             DebugSeed.watchGoalsIfRequested(context: context)
             DebugSeed.endGoalYesterdayIfRequested(context: context)
             DebugSeed.dumpStreaksIfRequested(context: context)
+            DebugSeed.dumpMissingSymbolsIfRequested()
             DebugSeed.runProgressSelfTestIfRequested()
             CSVImport.selfTestIfRequested()
             await DebugSeed.runIntentSmokeTestIfRequested()

myApp/HaruDanim/IOS/Core/DebugSeed.swift

@@ -485,6 +485,18 @@ enum DebugSeed {
         try? lines.joined(separator: "\n").write(to: url, atomically: true, encoding: .utf8)
     }
 
+    /// `-symbolAuditDump` 런치 인자: 아이콘 카탈로그에서 현재 OS에 없는 심볼을
+    /// Documents/symbol-audit.txt로 기록 — 하위 OS(iOS 18) QA용. 선택기는 어차피
+    /// 런타임 필터로 걸러지므로, 이 목록은 "26 기기에서 고른 심볼이 18 기기에서
+    /// 빈 아이콘이 될 수 있는 후보"를 뜻한다 (비어 있으면 교차 기기 위험 없음).
+    static func dumpMissingSymbolsIfRequested() {
+        guard UserDefaults.standard.bool(forKey: "symbolAuditDump") else { return }
+        let missing = SymbolCatalog.missingSymbolsOnThisOS
+        let lines = ["missing=\(missing.count)"] + missing
+        let url = URL.documentsDirectory.appending(path: "symbol-audit.txt")
+        try? lines.joined(separator: "\n").write(to: url, atomically: true, encoding: .utf8)
+    }
+
     /// `-watchGoals <N>` 런치 인자: 생성순 목표 N개를 '애플워치에서 보기'로 설정
     /// (0이면 전체 해제 — 워치 컴플리케이션 필터 검증용. 설정 후 스냅숏을 즉시 푸시)
     static func watchGoalsIfRequested(context: ModelContext) {

myApp/HaruDanim/IOS/Core/SymbolCatalog.swift

@@ -25,6 +25,15 @@ enum SymbolCatalog {
         return categories.flatMap(\.symbols).filter { seen.insert($0).inserted }
     }
 
+    #if DEBUG
+    /// 검증용(-symbolAuditDump): 카탈로그 원본 중 현재 OS에 없는 심볼 — 하위 OS QA (§14)
+    static var missingSymbolsOnThisOS: [String] {
+        var seen = Set<String>()
+        return rawCategories.flatMap(\.1)
+            .filter { seen.insert($0).inserted && UIImage(systemName: $0) == nil }
+    }
+    #endif
+
     private static let rawCategories: [(String, [String])] = [
         (String(localized: "인기"), [
             "star.fill", "heart.fill", "flame.fill", "bolt.fill", "leaf.fill",

myApp/HaruDanim/IOS/Views/ActionViews.swift

@@ -170,7 +170,7 @@ struct ActionRow: View {
 
     var body: some View {
         HStack(spacing: 12) {
-            Image(systemName: action.symbolName)
+            Image(safeSymbol: action.symbolName)
                 .font(.system(size: 16, weight: .semibold))
                 .foregroundStyle(.white)
                 .frame(width: 34, height: 34)
@@ -263,7 +263,7 @@ struct FavoriteOrderSheet: View {
                 Section {
                     ForEach(favorites) { action in
                         HStack(spacing: 10) {
-                            Image(systemName: action.symbolName)
+                            Image(safeSymbol: action.symbolName)
                                 .font(.system(size: 13, weight: .semibold))
                                 .foregroundStyle(.white)
                                 .frame(width: 28, height: 28)
@@ -347,7 +347,7 @@ struct ActionDetailView: View {
                 HStack {
                     Text("아이콘")
                     Spacer()
-                    Image(systemName: action.symbolName)
+                    Image(safeSymbol: action.symbolName)
                         .foregroundStyle(.white)
                         .frame(width: 30, height: 30)
                         .background(action.color, in: RoundedRectangle(cornerRadius: 8))
@@ -461,7 +461,7 @@ struct ActionEditorView: View {
                         showingSymbolPicker = true
                     } label: {
                         HStack {
-                            Image(systemName: symbolName)
+                            Image(safeSymbol: symbolName)
                                 .font(.system(size: 20))
                                 .foregroundStyle(AppTheme.green)
                                 .frame(width: 36, height: 36)

myApp/HaruDanim/IOS/Views/DiaryDefaultsSheet.swift

@@ -281,7 +281,7 @@ struct DiaryDefaultsSheet: View {
             }
         )) {
             HStack(spacing: 10) {
-                Image(systemName: goal.symbolName)
+                Image(safeSymbol: goal.symbolName)
                     .font(.system(size: 12, weight: .semibold))
                     .foregroundStyle(.white)
                     .frame(width: 26, height: 26)
@@ -319,7 +319,7 @@ struct DiaryDefaultsSheet: View {
                     }
                 )) {
                     HStack(spacing: 10) {
-                        Image(systemName: action.symbolName)
+                        Image(safeSymbol: action.symbolName)
                             .font(.system(size: 12, weight: .semibold))
                             .foregroundStyle(.white)
                             .frame(width: 26, height: 26)

myApp/HaruDanim/IOS/Views/DiaryNotePage.swift

@@ -465,8 +465,8 @@ private struct DiaryZoomContainer<Content: View>: UIViewRepresentable {
     let zoomEnabled: Bool
     @ViewBuilder let content: () -> Content
 
-    func makeCoordinator() -> Coordinator {
-        Coordinator()
+    func makeCoordinator() -> DiaryZoomCoordinator {
+        DiaryZoomCoordinator()
     }
 
     func makeUIView(context: Context) -> DiaryZoomScrollView {
@@ -490,7 +490,7 @@ private struct DiaryZoomContainer<Content: View>: UIViewRepresentable {
             NSNumber(value: UITouch.TouchType.direct.rawValue)
         ]
 
-        let hosting = UIHostingController(rootView: content())
+        let hosting = UIHostingController(rootView: AnyView(content()))
         hosting.view.backgroundColor = .clear
         hosting.safeAreaRegions = []
         hosting.view.frame = CGRect(origin: .zero, size: pageSize)
@@ -516,27 +516,33 @@ private struct DiaryZoomContainer<Content: View>: UIViewRepresentable {
     }
 
     func updateUIView(_ scroll: DiaryZoomScrollView, context: Context) {
-        context.coordinator.hosting?.rootView = content()
+        context.coordinator.hosting?.rootView = AnyView(content())
         scroll.pinchGestureRecognizer?.isEnabled = zoomEnabled
         // 배치 모드에서는 한 손가락 드래그를 요소 이동에 양보 (페이지 이동은 두 손가락)
         scroll.panGestureRecognizer.minimumNumberOfTouches = zoomEnabled ? 1 : 2
     }
+}
 
-    final class Coordinator: NSObject, UIScrollViewDelegate {
-        var hosting: UIHostingController<Content>?
+/// ⚠️ 비제네릭·톱레벨 + AnyView 소거 유지(1.4 하한 18 컴파일러 우회): 예전처럼
+/// DiaryZoomContainer<Content> 안에 중첩해 UIHostingController<Content>를 들면,
+/// 하한 18 Release(-O wholemodule) 빌드에서 swift-frontend가 이 클래스의 deinit을
+/// 최적화하다 크래시한다(SILPerformanceInliner의
+/// isCallerAndCalleeLayoutConstraintsCompatible 무한 재귀 — 하한 26에서는 정상, 실측).
+/// rootView는 원래 매 갱신 통째로 교체되므로 AnyView 소거의 동작 차이는 없다.
+private final class DiaryZoomCoordinator: NSObject, UIScrollViewDelegate {
+    var hosting: UIHostingController<AnyView>?
 
-        func viewForZooming(in scrollView: UIScrollView) -> UIView? {
-            (scrollView as? DiaryZoomScrollView)?.zoomedView
-        }
+    func viewForZooming(in scrollView: UIScrollView) -> UIView? {
+        (scrollView as? DiaryZoomScrollView)?.zoomedView
+    }
 
-        func scrollViewDidZoom(_ scrollView: UIScrollView) {
-            (scrollView as? DiaryZoomScrollView)?.centerZoomedView()
-        }
+    func scrollViewDidZoom(_ scrollView: UIScrollView) {
+        (scrollView as? DiaryZoomScrollView)?.centerZoomedView()
+    }
 
-        func scrollViewDidEndZooming(_ scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
-            // 핀치가 끝난 배율에 맞춰 캔버스 래스터 해상도를 다시 맞춘다 (확대 시 픽셀 번짐 방지)
-            (scrollView as? DiaryZoomScrollView)?.updateCanvasSharpness()
-        }
+    func scrollViewDidEndZooming(_ scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
+        // 핀치가 끝난 배율에 맞춰 캔버스 래스터 해상도를 다시 맞춘다 (확대 시 픽셀 번짐 방지)
+        (scrollView as? DiaryZoomScrollView)?.updateCanvasSharpness()
     }
 }
 

myApp/HaruDanim/IOS/Views/DiaryView.swift

@@ -1565,7 +1565,7 @@ private struct DiaryGoalsCard: View {
         let dayRatio = goal.combinedSpanRatio(.day, math: math, now: referenceNow)
         VStack(alignment: .leading, spacing: 10) {
             HStack(spacing: 10) {
-                Image(systemName: goal.symbolName)
+                Image(safeSymbol: goal.symbolName)
                     .font(.system(size: 13, weight: .semibold))
                     .foregroundStyle(.white)
                     .frame(width: 28, height: 28)
@@ -1627,7 +1627,7 @@ private struct DiaryGoalsCard: View {
         let target = quest.targetValue
         let limit = quest.direction == .atMost
         HStack(alignment: .firstTextBaseline, spacing: 8) {
-            Image(systemName: quest.targetSymbol)
+            Image(safeSymbol: quest.targetSymbol)
                 .font(.system(size: 10, weight: .semibold))
                 .foregroundStyle(.white)
                 .frame(width: 20, height: 20)
@@ -1798,7 +1798,7 @@ private struct DiaryGoalFilterSheet: View {
             toggle(id)
         } label: {
             HStack(spacing: 10) {
-                Image(systemName: goal.symbolName)
+                Image(safeSymbol: goal.symbolName)
                     .font(.system(size: 13, weight: .semibold))
                     .foregroundStyle(.white)
                     .frame(width: 28, height: 28)

myApp/HaruDanim/IOS/Views/ExportImageView.swift

@@ -978,7 +978,7 @@ struct ExportSectionView: View {
 
     private func recordRow(_ row: ExportRecordRow) -> some View {
         HStack(spacing: 10) {
-            Image(systemName: row.symbol)
+            Image(safeSymbol: row.symbol)
                 .font(.system(size: 13, weight: .semibold))
                 .foregroundStyle(.white)
                 .frame(width: 28, height: 28)
@@ -1082,7 +1082,7 @@ struct ExportSectionView: View {
                     ForEach(group.rows) { row in
                         GridRow {
                             HStack(spacing: 8) {
-                                Image(systemName: row.symbol)
+                                Image(safeSymbol: row.symbol)
                                     .font(.system(size: 11, weight: .semibold))
                                     .foregroundStyle(.white)
                                     .frame(width: 24, height: 24)
@@ -1195,7 +1195,7 @@ private struct ExportTimetableView: View {
                         .lineLimit(1)
                         .padding(4)
                 } else if height >= 12 {
-                    Image(systemName: block.symbol)
+                    Image(safeSymbol: block.symbol)
                         .font(.system(size: 7, weight: .bold))
                         .foregroundStyle(.white)
                         .padding(2)

myApp/HaruDanim/IOS/Views/GoalViews.swift

@@ -197,7 +197,7 @@ struct GoalListView: View {
     /// 순서 변경 모드에서 보여줄 간략한 목표 행
     private func reorderRow(_ goal: Goal) -> some View {
         HStack(spacing: 10) {
-            Image(systemName: goal.symbolName)
+            Image(safeSymbol: goal.symbolName)
                 .font(.system(size: 13, weight: .semibold))
                 .foregroundStyle(.white)
                 .frame(width: 28, height: 28)
@@ -249,7 +249,7 @@ struct GoalRow: View {
     var body: some View {
         VStack(alignment: .leading, spacing: 8) {
             HStack(spacing: 10) {
-                Image(systemName: goal.symbolName)
+                Image(safeSymbol: goal.symbolName)
                     .font(.system(size: 16, weight: .semibold))
                     .foregroundStyle(.white)
                     .frame(width: 34, height: 34)
@@ -339,7 +339,7 @@ struct QuestRow: View {
     var body: some View {
         VStack(alignment: .leading, spacing: 6) {
             HStack(spacing: 8) {
-                Image(systemName: quest.targetSymbol)
+                Image(safeSymbol: quest.targetSymbol)
                     .font(.system(size: 12, weight: .semibold))
                     .foregroundStyle(.white)
                     .frame(width: 24, height: 24)
@@ -641,7 +641,7 @@ struct GoalEditorView: View {
                         showingSymbolPicker = true
                     } label: {
                         HStack {
-                            Image(systemName: symbolName)
+                            Image(safeSymbol: symbolName)
                                 .font(.system(size: 18))
                                 .foregroundStyle(.white)
                                 .frame(width: 34, height: 34)

myApp/HaruDanim/IOS/Views/HistoryView.swift

@@ -473,7 +473,7 @@ private struct HistoryRecordsView: View {
                         onTapSession(item.session)
                     } label: {
                         HStack(spacing: 10) {
-                            Image(systemName: item.action.symbolName)
+                            Image(safeSymbol: item.action.symbolName)
                                 .font(.system(size: 14, weight: .semibold))
                                 .foregroundStyle(.white)
                                 .frame(width: 30, height: 30)
@@ -512,7 +512,7 @@ private struct HistoryRecordsView: View {
                         onTapEntry(item.entry)
                     } label: {
                         HStack(spacing: 10) {
-                            Image(systemName: item.action.symbolName)
+                            Image(safeSymbol: item.action.symbolName)
                                 .font(.system(size: 14, weight: .semibold))
                                 .foregroundStyle(.white)
                                 .frame(width: 30, height: 30)
@@ -667,13 +667,13 @@ struct TimetableView: View {
                 .fill(item.action.color.opacity(0.85))
                 .overlay(alignment: .topLeading) {
                     if !weekly && height >= 18 {
-                        Label(item.action.name, systemImage: item.action.symbolName)
+                        Label(item.action.name, systemImage: SymbolCompat.safe(item.action.symbolName))
                             .font(.caption2.weight(.semibold))
                             .foregroundStyle(.white)
                             .lineLimit(1)
                             .padding(4)
                     } else if height >= 14 {
-                        Image(systemName: item.action.symbolName)
+                        Image(safeSymbol: item.action.symbolName)
                             .font(.system(size: 8, weight: .bold))
                             .foregroundStyle(.white)
                             .padding(2)
@@ -701,7 +701,7 @@ struct TimetableView: View {
                 Circle()
                     .strokeBorder(AppTheme.surface, lineWidth: 2)
                 if !weekly {
-                    Image(systemName: item.action.symbolName)
+                    Image(safeSymbol: item.action.symbolName)
                         .font(.system(size: 8, weight: .bold))
                         .foregroundStyle(.white)
                 }

myApp/HaruDanim/IOS/Views/MainView.swift

@@ -721,7 +721,7 @@ struct GoalSummaryCard: View {
         } label: {
             VStack(alignment: .leading, spacing: 10) {
                 HStack(spacing: 10) {
-                    Image(systemName: goal.symbolName)
+                    Image(safeSymbol: goal.symbolName)
                         .font(.system(size: 15, weight: .semibold))
                         .foregroundStyle(.white)
                         .frame(width: 32, height: 32)
@@ -807,7 +807,7 @@ struct GoalSummaryCard: View {
         let progress = QuestProgress(quest: quest)
         return VStack(alignment: .leading, spacing: 4) {
             HStack(spacing: 6) {
-                Image(systemName: quest.targetSymbol)
+                Image(safeSymbol: quest.targetSymbol)
                     .font(.system(size: 9, weight: .semibold))
                     .foregroundStyle(.white)
                     .frame(width: 18, height: 18)
@@ -905,7 +905,7 @@ struct SessionMemoSheet: View {
             VStack(alignment: .leading, spacing: 12) {
                 if let action = session.action {
                     HStack(spacing: 10) {
-                        Image(systemName: action.symbolName)
+                        Image(safeSymbol: action.symbolName)
                             .font(.system(size: 15, weight: .semibold))
                             .foregroundStyle(.white)
                             .frame(width: 32, height: 32)
@@ -964,7 +964,7 @@ struct CountMemoSheet: View {
             VStack(alignment: .leading, spacing: 12) {
                 if let action = entry.action {
                     HStack(spacing: 10) {
-                        Image(systemName: action.symbolName)
+                        Image(safeSymbol: action.symbolName)
                             .font(.system(size: 15, weight: .semibold))
                             .foregroundStyle(.white)
                             .frame(width: 32, height: 32)
@@ -1093,7 +1093,7 @@ struct RunningSessionRow: View {
 
     var body: some View {
         HStack(spacing: 10) {
-            Image(systemName: action.symbolName)
+            Image(safeSymbol: action.symbolName)
                 .font(.system(size: 16, weight: .semibold))
                 .foregroundStyle(.white)
                 .frame(width: 34, height: 34)
@@ -1212,7 +1212,7 @@ struct ActionButtonCell: View {
         } label: {
             VStack(alignment: .leading, spacing: compact ? 3 : 6) {
                 HStack {
-                    Image(systemName: action.symbolName)
+                    Image(safeSymbol: action.symbolName)
                         .font(.system(size: compact ? 17 : 26, weight: .medium))
                         .foregroundStyle(.white)
                         .symbolEffect(.bounce, value: bounce)

myApp/HaruDanim/IOS/Views/QuestEditorView.swift

@@ -98,7 +98,7 @@ struct QuestEditorView: View {
                     Picker("행동", selection: $selectedAction) {
                         Text("선택").tag(Action?.none)
                         ForEach(allActions) { action in
-                            Label(action.name, systemImage: action.symbolName)
+                            Label(action.name, systemImage: SymbolCompat.safe(action.symbolName))
                                 .tag(Optional(action))
                         }
                     }

myApp/HaruDanim/IOS/Views/RadialNavigationView.swift

@@ -21,6 +21,9 @@
 //   - 등장: 스태거(순차) 바운스 스프링 + 스월 회전. 닫힘: 지연 없이 FAB로 스냅 흡수.
 //     펼치면 메뉴 뒤로 은은한 초록 빛 무리(정적 그라데이션이라 렌더 비용 없음)가 퍼진다.
 //   - 아치 반경이 엄지 반경(~150pt) 안이라 세로 스택과 달리 모든 탭이 한 손에 닿는다.
+//   - iOS 18 폴백(1.4 하위 OS 지원): glassEffect 계열은 26 전용이라, 18에서는 같은 구슬을
+//     머티리얼 원(블러+하이라이트 테두리+그림자)으로 그린다 — 굴절·액체 모핑만 빠지고
+//     배치·스태거 스프링·더블탭 등 동작은 완전히 동일하다 (LiquidBallBackground 참고).
 //
 //  iPhone(Compact) 전용 — iPad·Mac은 SidebarRootView, watch는 별도 타깃이라 이 파일과 무관하다.
 //
@@ -129,16 +132,15 @@ struct GlassBubbleMenu: View {
                 // FAB(하단 중앙)를 기준점으로 빛 무리와 버블들이 부채꼴로 퍼진다.
                 ZStack {
                     glow(radius: radius)
-                    // 모든 유리 요소를 한 컨테이너에 담아 한 패스로 렌더링 + 근접 시 액체 모핑
-                    GlassEffectContainer(spacing: glassBlendSpacing) {
-                        ZStack {
-                            if expanded {
-                                ForEach(Array(tabs.enumerated()), id: \.element.id) { index, tab in
-                                    bubble(tab, index: index, count: tabs.count, radius: radius)
-                                }
-                            }
-                            fab
+                    // 모든 유리 요소를 한 컨테이너에 담아 한 패스로 렌더링 + 근접 시 액체 모핑.
+                    // iOS 18은 컨테이너가 없어 같은 클러스터를 그대로 그린다(모핑만 없음).
+                    // 26 API 직접 호출 금지 — LiquidGlassBall 주석의 컴파일러 우회 규칙 참고
+                    if #available(iOS 26.0, *) {
+                        GlassClusterContainer(spacing: glassBlendSpacing) {
+                            bubbleCluster(radius: radius)
                         }
+                    } else {
+                        bubbleCluster(radius: radius)
                     }
                 }
                 .frame(width: fabSize, height: fabSize)
@@ -196,6 +198,18 @@ struct GlassBubbleMenu: View {
         .allowsHitTesting(false)
     }
 
+    /// FAB + 버블 클러스터 — 26의 GlassEffectContainer 안팎에서 같은 계층을 쓴다
+    private func bubbleCluster(radius: CGFloat) -> some View {
+        ZStack {
+            if expanded {
+                ForEach(Array(tabs.enumerated()), id: \.element.id) { index, tab in
+                    bubble(tab, index: index, count: tabs.count, radius: radius)
+                }
+            }
+            fab
+        }
+    }
+
     // MARK: 유리 구슬 버튼
 
     /// 탭 하나를 리퀴드 글라스 구슬로 렌더링 — 아이콘과 이름이 한 구슬 안에 있어
@@ -230,15 +244,8 @@ struct GlassBubbleMenu: View {
             .contentShape(Circle())
         }
         .buttonStyle(.plain)
-        // 진짜 유리: 배경 굴절·빛 반사에 더해 .interactive가 눌림 시머·바운스까지 그려 준다.
-        // 현재 탭은 초록 틴트 유리로 강조.
-        .glassEffect(
-            isCurrent
-                ? .regular.tint(AppTheme.green.opacity(0.85)).interactive()
-                : .regular.interactive(),
-            in: .circle
-        )
-        .glassEffectID(tab.rawValue, in: glassSpace)
+        // 진짜 유리(26) 또는 머티리얼 원(18): 현재 탭은 양쪽 모두 초록으로 강조.
+        .modifier(LiquidBallBackground(tinted: isCurrent, morphID: tab.rawValue, namespace: glassSpace))
         .offset(x: bloomed ? dx : 0, y: bloomed ? dy : 0)
         // 펼칠 때만 안쪽부터 차례로 맺히는 스태거 + 감쇠 낮은 스프링(오버슈트로 액체 출렁임).
         // 되돌아갈 땐 지연 없이 한 번에 FAB로 흡수된다.
@@ -266,8 +273,7 @@ struct GlassBubbleMenu: View {
                 .contentShape(Circle())
         }
         .buttonStyle(.plain)
-        .glassEffect(.regular.interactive(), in: .circle)
-        .glassEffectID("fab", in: glassSpace)
+        .modifier(LiquidBallBackground(tinted: false, morphID: "fab", namespace: glassSpace))
         // 펼치면 살짝 커져 '유리가 부풀며 방울을 내보내는' 기준점이 된다
         .scaleEffect(expanded ? 1.07 : 1)
         .animation(.spring(response: 0.3, dampingFraction: 0.7), value: expanded)
@@ -322,3 +328,78 @@ struct GlassBubbleMenu: View {
         close()
     }
 }
+
+// MARK: - 구슬 배경 (26 리퀴드 글라스 / 18 머티리얼 폴백)
+
+/// 26 전용 컨테이너 래퍼 — LiquidGlassBall과 같은 이유로 선언을 @available로 격리
+@available(iOS 26.0, *)
+private struct GlassClusterContainer<Content: View>: View {
+    let spacing: CGFloat
+    @ViewBuilder let content: Content
+
+    var body: some View {
+        GlassEffectContainer(spacing: spacing) { content }
+    }
+}
+
+/// 유리 구슬 배경 — iOS 26: 시스템 리퀴드 글라스(.regular.interactive — 배경 굴절·빛 반사·
+/// 눌림 시머) + glassEffectID로 FAB와 한 덩어리 모핑. 현재 탭은 초록 틴트 유리.
+/// iOS 18 폴백: 머티리얼 블러 원 + 하이라이트 테두리 + 그림자 — 굴절·모핑만 없고
+/// 크기·배치·애니메이션은 26과 동일해 사용성 차이가 없다. 현재 탭은 초록 채움 원.
+/// 26 전용 유리 모디파이어 — 선언을 @available로 격리해 가용성 분기(하위 18 폴백)와
+/// glassEffect 제네릭이 뒤섞이지 않게 한다 (하한 18 Release 인라이너 크래시 조사 때
+/// 정리한 방어적 형태 — 실제 크래시 원인은 DiaryZoomCoordinator 쪽이었다, §6.7)
+@available(iOS 26.0, *)
+private struct LiquidGlassBall: ViewModifier {
+    let tinted: Bool
+    let morphID: String
+    let namespace: Namespace.ID
+
+    func body(content: Content) -> some View {
+        content
+            .glassEffect(
+                tinted
+                    ? .regular.tint(AppTheme.green.opacity(0.85)).interactive()
+                    : .regular.interactive(),
+                in: .circle
+            )
+            .glassEffectID(morphID, in: namespace)
+    }
+}
+
+/// iOS 18 폴백 구슬 — 머티리얼 블러 원 + 하이라이트 테두리 + 그림자
+private struct MaterialBall: ViewModifier {
+    let tinted: Bool
+
+    func body(content: Content) -> some View {
+        content
+            .background {
+                ZStack {
+                    Circle().fill(.ultraThinMaterial)
+                    if tinted {
+                        Circle().fill(AppTheme.green.opacity(0.85))
+                    }
+                    Circle().strokeBorder(.white.opacity(0.28), lineWidth: 0.6)
+                }
+                .shadow(color: .black.opacity(0.2), radius: 9, y: 4)
+            }
+    }
+}
+
+private struct LiquidBallBackground: ViewModifier {
+    let tinted: Bool
+    let morphID: String
+    let namespace: Namespace.ID
+
+    // 분기는 OS로 고정되어 런타임에 바뀌지 않으므로 AnyView 소거가
+    // 애니메이션·모핑 정체성에 영향을 주지 않는다
+    func body(content: Content) -> AnyView {
+        if #available(iOS 26.0, *) {
+            return AnyView(content.modifier(
+                LiquidGlassBall(tinted: tinted, morphID: morphID, namespace: namespace)
+            ))
+        } else {
+            return AnyView(content.modifier(MaterialBall(tinted: tinted)))
+        }
+    }
+}

myApp/HaruDanim/IOS/Views/RecordFilterSheet.swift

@@ -189,7 +189,7 @@ struct RecordFilterSheet: View {
             }
         } label: {
             HStack(spacing: 10) {
-                Image(systemName: action.symbolName)
+                Image(safeSymbol: action.symbolName)
                     .font(.system(size: 12, weight: .semibold))
                     .foregroundStyle(.white)
                     .frame(width: 24, height: 24)

myApp/HaruDanim/IOS/Views/SettingsView.swift

@@ -352,7 +352,7 @@ struct SettingsView: View {
                         .foregroundStyle(.primary)
                         .lineLimit(1)
                 } icon: {
-                    Image(systemName: goal.symbolName)
+                    Image(safeSymbol: goal.symbolName)
                         .foregroundStyle(goal.color)
                 }
                 Spacer()

myApp/HaruDanim/Shared/SymbolCompat.swift

@@ -0,0 +1,29 @@
+//
+//  SymbolCompat.swift
+//  Haru_Danim
+//
+//  사용자 지정 SF 심볼의 안전 렌더 (1.4 iOS 18 하위 지원).
+//  아이콘 카탈로그에는 상위 OS 전용 신형 심볼(예: SF 7의 broom.fill)이 들어 있어,
+//  26 기기에서 고른 심볼이 iCloud 동기화로 iOS 18 기기(또는 구형 watchOS)에 오면
+//  Image(systemName:)이 아무것도 그리지 않는다. 사용자 데이터(행동·목표)에서 온
+//  심볼 이름은 반드시 이 경유지로 렌더할 것 — 코드 리터럴 심볼(전부 구형)은 비대상.
+//  워치 앱·워치 위젯 타깃에는 같은 헬퍼의 사본이 있다(WatchSymbolCompat —
+//  폴더 동기화 그룹 멤버십이 갈려 한 파일을 공유할 수 없음).
+//
+
+import SwiftUI
+import UIKit
+
+enum SymbolCompat {
+    /// 이 OS에 없는 심볼 이름을 안전한 폴백으로 바꾼다
+    static func safe(_ name: String) -> String {
+        UIImage(systemName: name) != nil ? name : "questionmark.circle.fill"
+    }
+}
+
+extension Image {
+    /// 사용자 데이터의 심볼 렌더 전용 — 이 OS에 없는 이름은 물음표로 대치
+    init(safeSymbol name: String) {
+        self.init(systemName: SymbolCompat.safe(name))
+    }
+}

myApp/HaruDanim/Widgets/ActionControlWidget.swift

@@ -90,7 +90,7 @@ struct ActionRunControl: ControlWidget {
                         : value.isCount
                             ? String(localized: "탭해서 +1")
                             : isOn ? String(localized: "측정 중") : String(localized: "시작"),
-                    systemImage: value.symbolName
+                    systemImage: SymbolCompat.safe(value.symbolName)
                 )
             }
         }

myApp/HaruDanim/Widgets/ActionRunWidget.swift

@@ -196,7 +196,7 @@ struct ActionRunCellView: View {
     private var tileContent: some View {
         VStack(alignment: .leading, spacing: 4) {
             HStack {
-                Image(systemName: cell.symbolName)
+                Image(safeSymbol: cell.symbolName)
                     .font(.system(size: 18, weight: .semibold))
                 Spacer()
                 runningDot
@@ -219,7 +219,7 @@ struct ActionRunCellView: View {
     /// 가로형 (중형 2×2 / 대형 작은 셀 8개)
     private var rowContent: some View {
         HStack(spacing: 8) {
-            Image(systemName: cell.symbolName)
+            Image(safeSymbol: cell.symbolName)
                 .font(.system(size: 15, weight: .semibold))
             VStack(alignment: .leading, spacing: 1) {
                 Text(cell.name)

myApp/HaruDanim/Widgets/GoalWidgets.swift

@@ -139,7 +139,7 @@ struct GoalBarsCellView: View {
     var body: some View {
         VStack(alignment: .leading, spacing: 5) {
             HStack(spacing: 5) {
-                Image(systemName: goal.symbolName)
+                Image(safeSymbol: goal.symbolName)
                     .font(.system(size: 11, weight: .semibold))
                     .foregroundStyle(goal.color)
                 Text(goal.title)
@@ -173,7 +173,7 @@ struct QuestBarRow: View {
 
     var body: some View {
         HStack(spacing: 6) {
-            Image(systemName: quest.symbolName)
+            Image(safeSymbol: quest.symbolName)
                 .font(.system(size: 10, weight: .semibold))
                 .foregroundStyle(quest.color)
                 .frame(width: 14)
@@ -596,7 +596,7 @@ struct QuestStatusWidgetView: View {
     private func goalSection(_ goal: GoalSnapshot, maxCount: Int, columns: Int, ringSize: CGFloat) -> some View {
         VStack(spacing: 10) {
             HStack(spacing: 4) {
-                Image(systemName: goal.symbolName)
+                Image(safeSymbol: goal.symbolName)
                     .font(.system(size: 10, weight: .semibold))
                     .foregroundStyle(goal.color)
                 Text(goal.title)

myApp/HaruDanim/Widgets/HaruDanimWidgets.swift

@@ -33,7 +33,7 @@ struct TrackingLiveActivity: Widget {
             DynamicIsland {
                 DynamicIslandExpandedRegion(.leading) {
                     HStack(spacing: 8) {
-                        Image(systemName: context.state.symbolName)
+                        Image(safeSymbol: context.state.symbolName)
                             .font(.system(size: 16, weight: .semibold))
                             .foregroundStyle(.white)
                             .frame(width: 32, height: 32)
@@ -65,7 +65,7 @@ struct TrackingLiveActivity: Widget {
                     }
                 }
             } compactLeading: {
-                Image(systemName: context.state.symbolName)
+                Image(safeSymbol: context.state.symbolName)
                     .foregroundStyle(context.state.tintColor)
             } compactTrailing: {
                 HStack(spacing: 2) {
@@ -80,7 +80,7 @@ struct TrackingLiveActivity: Widget {
                     }
                 }
             } minimal: {
-                Image(systemName: context.state.symbolName)
+                Image(safeSymbol: context.state.symbolName)
                     .foregroundStyle(context.state.tintColor)
             }
         }

myApp/HaruDanim/Widgets/LockScreenWidgets.swift

@@ -154,7 +154,7 @@ struct LockGoalWidgetView: View {
         switch entry.style {
         case .gauge:
             Gauge(value: min(max(entry.ratio, 0), 1)) {
-                Image(systemName: goal.symbolName)
+                Image(safeSymbol: goal.symbolName)
                     .widgetAccentable()
             } currentValueLabel: {
                 Text("\(Int((entry.ratio * 100).rounded()))")
@@ -180,7 +180,7 @@ struct LockGoalWidgetView: View {
             ZStack {
                 AccessoryWidgetBackground()
                 VStack(spacing: 3) {
-                    Image(systemName: goal.symbolName)
+                    Image(safeSymbol: goal.symbolName)
                         .font(.system(size: 12, weight: .semibold))
                         .widgetAccentable()
                     questDots(goal, size: 6)
@@ -192,7 +192,7 @@ struct LockGoalWidgetView: View {
     private func rectangularView(_ goal: GoalSnapshot) -> some View {
         VStack(alignment: .leading, spacing: 2) {
             HStack(spacing: 4) {
-                Image(systemName: goal.symbolName)
+                Image(safeSymbol: goal.symbolName)
                     .font(.system(size: 11, weight: .semibold))
                 Text(goal.title)
                     .font(.caption.weight(.semibold))

myApp/HaruDanim/Widgets/NowRunningWidget.swift

@@ -234,7 +234,7 @@ struct NowRunningSmallView: View {
     var body: some View {
         VStack(alignment: .leading, spacing: 3) {
             HStack {
-                Image(systemName: primary.symbolName)
+                Image(safeSymbol: primary.symbolName)
                     .font(.system(size: 18, weight: .semibold))
                 Spacer()
                 Image(systemName: "record.circle")
@@ -285,7 +285,7 @@ struct NowRunningHeroView: View {
 
     var body: some View {
         HStack(spacing: 12) {
-            Image(systemName: primary.symbolName)
+            Image(safeSymbol: primary.symbolName)
                 .font(.system(size: 22, weight: .semibold))
                 .frame(width: 46, height: 46)
                 .background(
@@ -404,7 +404,7 @@ struct NowRunningRowView: View {
 
     var body: some View {
         HStack(spacing: 10) {
-            Image(systemName: item.symbolName)
+            Image(safeSymbol: item.symbolName)
                 .font(.system(size: 14, weight: .semibold))
                 .foregroundStyle(isFullColor ? AnyShapeStyle(.white) : AnyShapeStyle(.primary))
                 .frame(width: 30, height: 30)
@@ -458,7 +458,7 @@ struct LockScreenActivityView: View {
 
     var body: some View {
         HStack(spacing: 12) {
-            Image(systemName: state.symbolName)
+            Image(safeSymbol: state.symbolName)
                 .font(.system(size: 18, weight: .semibold))
                 .foregroundStyle(.white)
                 .frame(width: 40, height: 40)

myApp/HaruDanim/Widgets/WidgetSupport.swift

@@ -248,7 +248,7 @@ struct WidgetEmptyView: View {
 
     var body: some View {
         VStack(spacing: 6) {
-            Image(systemName: symbolName)
+            Image(safeSymbol: symbolName)
                 .font(.title3)
                 .foregroundStyle(AppTheme.green)
             Text(message)
@@ -297,7 +297,7 @@ struct QuestRingView: View {
                     style: StrokeStyle(lineWidth: lineWidth, lineCap: .round)
                 )
                 .rotationEffect(.degrees(-90))
-            Image(systemName: snapshot.symbolName)
+            Image(safeSymbol: snapshot.symbolName)
                 .font(.system(size: iconSize, weight: .semibold))
                 .foregroundStyle(snapshot.color)
         }