river: remove Output.root

The server is now global so this is no longer needed.

river/command/focus_view.zig

@@ -17,6 +17,8 @@
 
 const std = @import("std");
 
+const server = &@import("../main.zig").server;
+
 const Direction = @import("../command.zig").Direction;
 const Error = @import("../command.zig").Error;
 const Seat = @import("../Seat.zig");
@@ -53,7 +55,7 @@ pub fn focusView(
         // Focus the next visible node if there is one
         if (it.next()) |view| {
             seat.focus(view);
-            output.root.startTransaction();
+            server.root.startTransaction();
             return;
         }
     }
@@ -66,7 +68,7 @@ pub fn focusView(
     };
 
     seat.focus(it.next());
-    output.root.startTransaction();
+    server.root.startTransaction();
 }
 
 fn filter(view: *View, filter_tags: u32) bool {

river/command/swap.zig

@@ -17,6 +17,8 @@
 
 const std = @import("std");
 
+const server = &@import("../main.zig").server;
+
 const Error = @import("../command.zig").Error;
 const Direction = @import("../command.zig").Direction;
 const Seat = @import("../Seat.zig");
@@ -74,7 +76,7 @@ pub fn swap(
     output.views.swap(focused_node, to_swap);
 
     output.arrangeViews();
-    output.root.startTransaction();
+    server.root.startTransaction();
 }
 
 fn filter(view: *View, filter_tags: u32) bool {

river/command/tags.zig

@@ -17,6 +17,8 @@
 
 const std = @import("std");
 
+const server = &@import("../main.zig").server;
+
 const Error = @import("../command.zig").Error;
 const Seat = @import("../Seat.zig");
 
@@ -32,7 +34,7 @@ pub fn setFocusedTags(
         seat.focused_output.pending.tags = tags;
         seat.focused_output.arrangeViews();
         seat.focus(null);
-        seat.focused_output.root.startTransaction();
+        server.root.startTransaction();
     }
 }
 
@@ -77,7 +79,7 @@ pub fn toggleFocusedTags(
         output.pending.tags = new_focused_tags;
         output.arrangeViews();
         seat.focus(null);
-        output.root.startTransaction();
+        server.root.startTransaction();
     }
 }
 

river/command/zoom.zig

@@ -17,6 +17,8 @@
 
 const std = @import("std");
 
+const server = &@import("../main.zig").server;
+
 const Error = @import("../command.zig").Error;
 const Seat = @import("../Seat.zig");
 const View = @import("../View.zig");
@@ -53,7 +55,7 @@ pub fn zoom(
             output.views.push(to_bump);
             seat.focus(&to_bump.view);
             output.arrangeViews();
-            output.root.startTransaction();
+            server.root.startTransaction();
         }
     }
 }