tame the reply swipe so vertical scrolling stays clean

- Raise the swipe dominance threshold to 2.0 and add a 24pt
  activation distance so diagonal timeline scrolls never move bubbles
  or fire haptics, and snap the indicator back when a gesture turns
  vertical mid-drag.
- Cover the stricter thresholds in MessageReplySwipeTests.

Luma.xcodeproj/project.pbxproj

@@ -344,7 +344,7 @@
 		6079CE75BAB995515A8D5460 /* CallSnapshot.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CallSnapshot.swift; sourceTree = "<group>"; };
 		60A97545E6E481D45E0BB20F /* ChatView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChatView.swift; sourceTree = "<group>"; };
 		61380B78824FDB98A933C7E9 /* ArchiveSyncRecoveryPolicyTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ArchiveSyncRecoveryPolicyTests.swift; sourceTree = "<group>"; };
-		6317FAA29F22A3EA8450208F /* LumaTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = LumaTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		6317FAA29F22A3EA8450208F /* LumaTests.xctest */ = {isa = PBXFileReference; includeInIndex = 0; lastKnownFileType = wrapper.cfbundle; path = LumaTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		63E4D099BDCB2311ADFE39E6 /* CallHistorySync.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CallHistorySync.swift; sourceTree = "<group>"; };
 		6773F87EE60F91BBDCA4B1F5 /* GroupConversationTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GroupConversationTests.swift; sourceTree = "<group>"; };
 		69F4FFBFD65C218FF6505844 /* SaslFailureMessage.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SaslFailureMessage.swift; sourceTree = "<group>"; };
@@ -417,12 +417,12 @@
 		D8C81B9255E9886FB86E0785 /* InlineVideoPlayer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InlineVideoPlayer.swift; sourceTree = "<group>"; };
 		D9BBE412EAF54DFE968B2E54 /* ArchiveSyncCheckpoint.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ArchiveSyncCheckpoint.swift; sourceTree = "<group>"; };
 		D9FCE089ABBF05EF9F55D451 /* VideoNoteRecordingLifecycleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VideoNoteRecordingLifecycleTests.swift; sourceTree = "<group>"; };
-		DF8C531E464C9C4EDE2648C6 /* Luma.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Luma.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		DF8C531E464C9C4EDE2648C6 /* Luma.app */ = {isa = PBXFileReference; includeInIndex = 0; lastKnownFileType = wrapper.application; path = Luma.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		E619B2C85B0DD2E80653D6D3 /* VideoNoteRecordingCompletionPolicy.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VideoNoteRecordingCompletionPolicy.swift; sourceTree = "<group>"; };
 		E6A5C32B4DACD56DA733A0DB /* ServerInformation.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ServerInformation.swift; sourceTree = "<group>"; };
 		E9F226A1F8D82B39630F9CEB /* LumaRoomStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LumaRoomStore.swift; sourceTree = "<group>"; };
 		EA1D94FE541121DAE9DCE3B0 /* LegacyArchiveImporter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LegacyArchiveImporter.swift; sourceTree = "<group>"; };
-		EA54340DD785335237158BEF /* Luma.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Luma.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		EA54340DD785335237158BEF /* LumaMac.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = LumaMac.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		F0A35C9A7B52458996513382 /* WatchVoiceRecorder.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WatchVoiceRecorder.swift; sourceTree = "<group>"; };
 		F207C1B20DE3780F1754F81D /* ConnectionBanner.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConnectionBanner.swift; sourceTree = "<group>"; };
 		F26F91180E43DE9C135B68C1 /* EmojiCatalog.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EmojiCatalog.swift; sourceTree = "<group>"; };
@@ -683,7 +683,7 @@
 			isa = PBXGroup;
 			children = (
 				DF8C531E464C9C4EDE2648C6 /* Luma.app */,
-				EA54340DD785335237158BEF /* Luma.app */,
+				EA54340DD785335237158BEF /* LumaMac.app */,
 				6317FAA29F22A3EA8450208F /* LumaTests.xctest */,
 				19D4E9404712E8643E31CB93 /* LumaWatch.app */,
 			);
@@ -767,7 +767,7 @@
 				2A745A82DD6F34F0CB46B52B /* WebRTC */,
 			);
 			productName = LumaMac;
-			productReference = EA54340DD785335237158BEF /* Luma.app */;
+			productReference = EA54340DD785335237158BEF /* LumaMac.app */;
 			productType = "com.apple.product-type.application";
 		};
 		BAB78463D7DE07A8F7B3D27D /* LumaWatch */ = {
@@ -813,7 +813,7 @@
 			isa = PBXProject;
 			attributes = {
 				BuildIndependentTargetsInParallel = YES;
-				LastUpgradeCheck = 2660;
+				LastUpgradeCheck = 1600;
 				TargetAttributes = {
 					0565F6C7DA26F0482928704E = {
 						DevelopmentTeam = K3AS449A74;
@@ -1169,7 +1169,6 @@
 				ASSETCATALOG_COMPILER_INCLUDE_ALL_APPICON_ASSETS = YES;
 				CODE_SIGN_ENTITLEMENTS = Config/LumaMac.entitlements;
 				COMBINE_HIDPI_IMAGES = YES;
-				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = K3AS449A74;
 				INFOPLIST_FILE = "Config/LumaMac-Info.plist";
 				INFOPLIST_KEY_CFBundleIconName = AppIcon;
@@ -1192,7 +1191,6 @@
 				ASSETCATALOG_COMPILER_INCLUDE_ALL_APPICON_ASSETS = YES;
 				CODE_SIGN_ENTITLEMENTS = Config/LumaMac.entitlements;
 				COMBINE_HIDPI_IMAGES = YES;
-				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = K3AS449A74;
 				INFOPLIST_FILE = "Config/LumaMac-Info.plist";
 				INFOPLIST_KEY_CFBundleIconName = AppIcon;
@@ -1290,7 +1288,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
 				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
@@ -1324,7 +1321,6 @@
 				COMPANION_BUNDLE_IDENTIFIER = app.luma.chat;
 				COPY_PHASE_STRIP = NO;
 				CURRENT_PROJECT_VERSION = 31;
-				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
@@ -1348,7 +1344,6 @@
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 5.9;
@@ -1378,7 +1373,6 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
 				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
@@ -1412,7 +1406,6 @@
 				COMPANION_BUNDLE_IDENTIFIER = app.luma.chat;
 				COPY_PHASE_STRIP = NO;
 				CURRENT_PROJECT_VERSION = 31;
-				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -1429,7 +1422,6 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				SWIFT_VERSION = 5.9;

Luma.xcodeproj/xcshareddata/xcschemes/Luma.xcscheme

@@ -1,10 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "2660"
-   version = "1.3">
+   LastUpgradeVersion = "1600"
+   version = "1.7">
    <BuildAction
       parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
+      buildImplicitDependencies = "YES"
+      runPostActionsOnFailure = "NO">
       <BuildActionEntries>
          <BuildActionEntry
             buildForTesting = "YES"
@@ -40,7 +41,8 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES">
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      onlyGenerateCoverageForSpecifiedTargets = "NO">
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
@@ -63,6 +65,8 @@
             </BuildableReference>
          </TestableReference>
       </Testables>
+      <CommandLineArguments>
+      </CommandLineArguments>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -84,6 +88,8 @@
             ReferencedContainer = "container:Luma.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
+      <CommandLineArguments>
+      </CommandLineArguments>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"

Luma.xcodeproj/xcshareddata/xcschemes/LumaMac.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "2660"
+   LastUpgradeVersion = "1600"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Luma.xcodeproj/xcshareddata/xcschemes/LumaWatch.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "2660"
+   LastUpgradeVersion = "1600"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Sources/Shared/Models/MessageReplySwipePolicy.swift

@@ -2,12 +2,19 @@ import CoreGraphics
 
 struct MessageReplySwipePolicy {
     static let triggerDistance: CGFloat = 64
+    /// Horizontal travel required before the reply indicator appears. Keeps
+    /// the per-cell state untouched during ordinary vertical scrolling.
+    static let activationDistance: CGFloat = 24
     static let maximumOffset: CGFloat = 76
-    static let horizontalDominance: CGFloat = 1.4
+    /// The drag must be clearly horizontal: a mostly vertical timeline scroll
+    /// (even a diagonal one) must never arm the reply swipe or move bubbles.
+    static let horizontalDominance: CGFloat = 2.0
 
     static func offset(for translation: CGSize) -> CGFloat {
         guard isHorizontal(translation) else { return 0 }
-        let distance = min(abs(translation.width) * 0.72, maximumOffset)
+        let width = abs(translation.width)
+        guard width >= activationDistance else { return 0 }
+        let distance = min((width - activationDistance) * 0.72 + 12, maximumOffset)
         return translation.width < 0 ? -distance : distance
     }
 

Sources/Shared/UI/Components/MessageBubble.swift

@@ -177,9 +177,16 @@ struct MessageBubble: View {
         DragGesture(minimumDistance: 20)
             .onChanged { value in
                 let offset = MessageReplySwipePolicy.offset(for: value.translation)
-                guard offset != 0 || replySwipeOffset != 0 else {
-                    // A vertical timeline pan must not publish per-cell state
-                    // changes or compete with UIScrollView's own recognizer.
+                guard offset != 0 else {
+                    // Vertical (or not clearly horizontal) movement: snap the
+                    // indicator back and never publish per-cell state changes
+                    // during an ordinary timeline scroll.
+                    if replySwipeOffset != 0 || replySwipeArmed {
+                        withAnimation(.spring(response: 0.24, dampingFraction: 0.82)) {
+                            replySwipeOffset = 0
+                        }
+                        replySwipeArmed = false
+                    }
                     return
                 }
                 replySwipeOffset = offset

Tests/MessageReplySwipeTests.swift

@@ -46,6 +46,30 @@ final class MessageReplySwipeTests: XCTestCase {
         ))
     }
 
+    func testDiagonalScrollAtOldThresholdDoesNotReply() {
+        // width/height ≈ 1.5 passed the old 1.4 dominance and moved bubbles
+        // during scrolling; the stricter policy must stay silent.
+        XCTAssertFalse(MessageReplySwipePolicy.shouldReply(
+            translation: CGSize(width: 60, height: 40),
+            predictedEndTranslation: CGSize(width: 60, height: 40)
+        ))
+        XCTAssertEqual(
+            MessageReplySwipePolicy.offset(for: CGSize(width: 60, height: 40)),
+            0
+        )
+    }
+
+    func testIndicatorStaysHiddenUntilActivationDistance() {
+        XCTAssertEqual(
+            MessageReplySwipePolicy.offset(for: CGSize(width: 20, height: 0)),
+            0
+        )
+        XCTAssertGreaterThan(
+            MessageReplySwipePolicy.offset(for: CGSize(width: 24, height: 0)),
+            0
+        )
+    }
+
     func testVisualOffsetIsCapped() {
         XCTAssertEqual(
             MessageReplySwipePolicy.offset(for: CGSize(width: 500, height: 0)),