Fix tab not activating with click

Muxy/Views/Workspace/TabStrip.swift

@@ -134,22 +134,22 @@ struct PaneTabStrip: View {
                     }
                 }
                 .gesture(
-                    DragGesture(minimumDistance: 4, coordinateSpace: .named(DragCoordinateSpace.mainWindow))
+                    DragGesture(minimumDistance: 0, coordinateSpace: .named(DragCoordinateSpace.mainWindow))
                         .onChanged { value in
                             handleDragChanged(
                                 tab: tab,
                                 globalLocation: value.location,
                                 dragStartGlobalLocation: value.startLocation
                             )
                         }
-                        .onEnded { _ in
-                            handleDragEnded()
+                        .onEnded { value in
+                            handleDragEnded(
+                                tab: tab,
+                                globalLocation: value.location,
+                                dragStartGlobalLocation: value.startLocation
+                            )
                         }
                 )
-                .onTapGesture {
-                    guard dragState.draggedID == nil else { return }
-                    onSelectTab(tab.id)
-                }
             }
         }
     }
@@ -162,12 +162,24 @@ struct PaneTabStrip: View {
         DevelopmentBadge()
     }
 
+    private static let dragActivationDistance: CGFloat = 4
+
     private func handleDragChanged(
         tab: TabSnapshot,
         globalLocation: CGPoint,
         dragStartGlobalLocation: CGPoint
     ) {
+        if !dragState.didSelect {
+            dragState.didSelect = true
+            onSelectTab(tab.id)
+        }
+
+        let dx = globalLocation.x - dragStartGlobalLocation.x
+        let dy = globalLocation.y - dragStartGlobalLocation.y
+        let distance = (dx * dx + dy * dy).squareRoot()
+
         if dragState.draggedID == nil {
+            guard distance >= Self.dragActivationDistance else { return }
             dragState.draggedID = tab.id
             dragState.lastReorderTargetID = nil
         }
@@ -177,9 +189,7 @@ struct PaneTabStrip: View {
             return
         }
 
-        let verticalEscape = abs(globalLocation.y - dragStartGlobalLocation.y) > 24
-
-        if verticalEscape, !tab.isPinned {
+        if abs(dy) > 24, !tab.isPinned {
             dragState.isInSplitMode = true
             dragCoordinator.beginDrag(tabID: tab.id, sourceAreaID: areaID, projectID: projectID)
             dragCoordinator.updatePosition(globalLocation)
@@ -189,7 +199,14 @@ struct PaneTabStrip: View {
         reorderIfNeeded(at: globalLocation)
     }
 
-    private func handleDragEnded() {
+    private func handleDragEnded(
+        tab: TabSnapshot,
+        globalLocation: CGPoint,
+        dragStartGlobalLocation: CGPoint
+    ) {
+        if !dragState.didSelect {
+            onSelectTab(tab.id)
+        }
         if dragState.isInSplitMode {
             if let result = dragCoordinator.endDrag() {
                 onDropAction(result)
@@ -200,6 +217,7 @@ struct PaneTabStrip: View {
             dragState.isInSplitMode = false
             dragState.frames = [:]
             dragState.lastReorderTargetID = nil
+            dragState.didSelect = false
         }
     }
 
@@ -235,6 +253,7 @@ private struct TabDragState {
     var frames: [UUID: CGRect] = [:]
     var isInSplitMode = false
     var lastReorderTargetID: UUID?
+    var didSelect = false
 }
 
 private typealias TabFramePreferenceKey = UUIDFramePreferenceKey<TabFrameTag>