Make undo/redo app-targeted so it works with no windows

src/App.zig

@@ -446,6 +446,9 @@ pub fn performAction(
         .toggle_visibility => _ = try rt_app.performAction(.app, .toggle_visibility, {}),
         .check_for_updates => _ = try rt_app.performAction(.app, .check_for_updates, {}),
         .show_gtk_inspector => _ = try rt_app.performAction(.app, .show_gtk_inspector, {}),
+        .undo => _ = try rt_app.performAction(.app, .undo, {}),
+
+        .redo => _ = try rt_app.performAction(.app, .redo, {}),
     }
 }
 

src/Surface.zig

@@ -3923,6 +3923,21 @@ pub fn performBindingAction(self: *Surface, action: input.Binding.Action) !bool
                 .{ .parent = self },
             ),
 
+            // Undo and redo both support both surface and app targeting.
+            // If we are triggering on a surface then we perform the
+            // action with the surface target.
+            .undo => return try self.rt_app.performAction(
+                .{ .surface = self },
+                .undo,
+                {},
+            ),
+
+            .redo => return try self.rt_app.performAction(
+                .{ .surface = self },
+                .redo,
+                {},
+            ),
+
             else => try self.app.performAction(
                 self.rt_app,
                 action.scoped(.app).?,
@@ -4337,18 +4352,6 @@ pub fn performBindingAction(self: *Surface, action: input.Binding.Action) !bool
             {},
         ),
 
-        .undo => return try self.rt_app.performAction(
-            .{ .surface = self },
-            .undo,
-            {},
-        ),
-
-        .redo => return try self.rt_app.performAction(
-            .{ .surface = self },
-            .redo,
-            {},
-        ),
-
         .select_all => {
             const sel = self.io.terminal.screen.selectAll();
             if (sel) |s| {

src/input/Binding.zig

@@ -980,6 +980,8 @@ pub const Action = union(enum) {
 
             // These are app but can be special-cased in a surface context.
             .new_window,
+            .undo,
+            .redo,
             => .app,
 
             // Obviously surface actions.
@@ -1020,8 +1022,6 @@ pub const Action = union(enum) {
             .toggle_secure_input,
             .toggle_command_palette,
             .reset_window_size,
-            .undo,
-            .redo,
             .crash,
             => .surface,