Use native text Close button for sheet toolbars on macOS

Sheet dismiss buttons rendered as an iOS-style circular glass "X" on
macOS 26, which looks foreign on the desktop. Add a shared
sheetCloseToolbarItem helper that renders a native text "Close" button
on macOS while keeping the compact icon-only xmark on iOS/tvOS, and
replace the ~14 duplicated inline close buttons across sheets with it.

Yattee/Views/Settings/AddSourceView.swift

@@ -64,14 +64,7 @@ struct AddSourceView: View {
                 .navigationBarTitleDisplayMode(.inline)
                 #endif
                 .toolbar {
-                    ToolbarItem(placement: .confirmationAction) {
-                        Button(role: .cancel) {
-                            dismiss()
-                        } label: {
-                            Label(String(localized: "common.close"), systemImage: "xmark")
-                                .labelStyle(.iconOnly)
-                        }
-                    }
+                    sheetCloseToolbarItem { dismiss() }
                 }
                 .navigationDestination(isPresented: $navigateToWebDAV) {
                     AddWebDAVView(

Yattee/Views/Settings/InstancePickerSheet.swift

@@ -54,14 +54,7 @@ struct InstancePickerSheet: View {
             .navigationBarTitleDisplayMode(.inline)
             #endif
             .toolbar {
-                ToolbarItem(placement: .confirmationAction) {
-                    Button(role: .cancel) {
-                        dismiss()
-                    } label: {
-                        Label(String(localized: "common.close"), systemImage: "xmark")
-                            .labelStyle(.iconOnly)
-                    }
-                }
+                sheetCloseToolbarItem { dismiss() }
             }
         }
         .presentationDetents([.medium, .large])

Yattee/Views/Settings/LogViewerView.swift

@@ -278,14 +278,7 @@ private struct LogEntryDetailView: View {
             .navigationBarTitleDisplayMode(.inline)
             #endif
             .toolbar {
-                ToolbarItem(placement: .confirmationAction) {
-                    Button(role: .cancel) {
-                        dismiss()
-                    } label: {
-                        Label(String(localized: "common.close"), systemImage: "xmark")
-                            .labelStyle(.iconOnly)
-                    }
-                }
+                sheetCloseToolbarItem { dismiss() }
             }
         }
         .presentationDetents([.medium, .large])

Yattee/Views/Settings/PeerTubeInstancesExploreView.swift

@@ -215,14 +215,7 @@ struct PeerTubeInstancesExploreView: View {
     @ToolbarContentBuilder
     private var toolbarContent: some ToolbarContent {
         #if !os(tvOS)
-        ToolbarItem(placement: .confirmationAction) {
-            Button(role: .cancel) {
-                dismiss()
-            } label: {
-                Label(String(localized: "common.close"), systemImage: "xmark")
-                    .labelStyle(.iconOnly)
-            }
-        }
+        sheetCloseToolbarItem { dismiss() }
         #endif
 
         ToolbarItem(placement: .primaryAction) {

Yattee/Views/Settings/PlayerControls/Gestures/TapGesturesSettingsView.swift

@@ -187,14 +187,7 @@ struct TapGesturesSettingsView: View {
 
         TapZoneActionPicker(position: position, action: binding)
             .toolbar {
-                ToolbarItem(placement: .confirmationAction) {
-                    Button(role: .cancel) {
-                        selectedZonePosition = nil
-                    } label: {
-                        Label(String(localized: "common.close"), systemImage: "xmark")
-                            .labelStyle(.iconOnly)
-                    }
-                }
+                sheetCloseToolbarItem { selectedZonePosition = nil }
             }
     }
 

Yattee/Views/Settings/SettingsView.swift

@@ -328,15 +328,7 @@ struct SettingsView: View {
             .navigationBarTitleDisplayMode(.inline)
             .toolbar {
                 if showCloseButton {
-                    ToolbarItem(placement: .confirmationAction) {
-                        Button(role: .cancel) {
-                            dismiss()
-                        } label: {
-                            Label(String(localized: "common.close"), systemImage: "xmark")
-                                .labelStyle(.iconOnly)
-                        }
-                        .accessibilityIdentifier("settings.doneButton")
-                    }
+                    sheetCloseToolbarItem(identifier: "settings.doneButton") { dismiss() }
                 }
             }
             .accessibilityIdentifier("settings.view")