Move the Mac toolbar buttons to the window toolbar

Sidebar-column toolbar items are confined to the sidebar's narrow
section of the unified toolbar and collapse into overflow; attaching
New Routine and Starter Gallery to the split view gives them the full
trailing section.

Workouts Mac/Views/MacContentView.swift

@@ -30,7 +30,7 @@ private struct PendingRoutineEdit: Identifiable {
 /// Root content once iCloud is available: a Mac-native `NavigationSplitView` shell.
 /// The sidebar lists the two Library destinations plus every routine (reorderable,
 /// with a per-row context menu); the detail column swaps on selection. New Routine
-/// and the Starter Gallery are surfaced as sheets from the sidebar toolbar.
+/// and the Starter Gallery are surfaced as sheets from the window toolbar.
 struct MacContentView: View {
     @Environment(SyncEngine.self) private var syncEngine
 
@@ -50,6 +50,27 @@ struct MacContentView: View {
         } detail: {
             detail
         }
+        // Attached to the split view, not the sidebar List: sidebar-column toolbar
+        // items are confined to the sidebar's (narrow) section of the unified
+        // toolbar and collapse into the overflow menu. Here they get the full
+        // trailing section instead.
+        .toolbar {
+            ToolbarItemGroup(placement: .primaryAction) {
+                Button {
+                    showingNewRoutine = true
+                } label: {
+                    Label("New Routine", systemImage: "plus")
+                }
+                .help("New Routine")
+
+                Button {
+                    showingStarterGallery = true
+                } label: {
+                    Label("Starter Gallery", systemImage: "sparkles")
+                }
+                .help("Browse Starter Routines")
+            }
+        }
         .sheet(isPresented: $showingNewRoutine) {
             MacRoutineEditorSheet(routine: nil)
         }
@@ -121,23 +142,6 @@ struct MacContentView: View {
             }
         }
         .navigationTitle("Workouts")
-        .toolbar {
-            ToolbarItemGroup {
-                Button {
-                    showingNewRoutine = true
-                } label: {
-                    Label("New Routine", systemImage: "plus")
-                }
-                .help("New Routine")
-
-                Button {
-                    showingStarterGallery = true
-                } label: {
-                    Label("Starter Gallery", systemImage: "sparkles")
-                }
-                .help("Browse Starter Routines")
-            }
-        }
     }
 
     // MARK: - Detail