Cursor: fix pointer enter/leave events

We must mark the windowing state as dirty if this state changes.

 river/Cursor.zig       | 7 +++++++
 rivercompat/Config.zig | 1 +
 rivercompat/Window.zig | 5 ++++-
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/river/Cursor.zig b/river/Cursor.zig
index 6ede6b0..cfdf21f 100644
--- a/river/Cursor.zig
+++ b/river/Cursor.zig
@@ -362,6 +362,7 @@ pub fn processMotionRelative(cursor: *Cursor, event: *const wlr.Pointer.event.Mo
 }
 
 fn updateHovered(cursor: *Cursor) void {
+    const old = cursor.seat.windowing_scheduled.window;
     if (server.scene.at(cursor.wlr_cursor.x, cursor.wlr_cursor.y)) |result| {
         switch (result.data) {
             .window => |window| {
@@ -387,6 +388,12 @@ fn updateHovered(cursor: *Cursor) void {
                 cursor.seat.windowing_scheduled.window = null;
             },
         }
+    } else {
+        cursor.seat.windowing_scheduled.window = null;
+    }
+
+    if (cursor.seat.windowing_scheduled.window != old) {
+        server.wm.dirtyWindowing();
     }
 }
 
diff --git a/rivercompat/Config.zig b/rivercompat/Config.zig
index 52e6e28..2faf3bb 100644
--- a/rivercompat/Config.zig
+++ b/rivercompat/Config.zig
@@ -24,6 +24,7 @@ const gpa = std.heap.c_allocator;
 border_width: u31 = 3,
 border_color_unfocused: u32 = 0x586e75,
 border_color_focused: u32 = 0x93a1a1,
+border_color_hovered: u32 = 0xdc322f,
 
 main_count: u31 = 1,
 main_location: enum { left, right, top, bottom } = .left,
diff --git a/rivercompat/Window.zig b/rivercompat/Window.zig
index def241f..fabf599 100644
--- a/rivercompat/Window.zig
+++ b/rivercompat/Window.zig
@@ -172,7 +172,10 @@ pub fn updateRendering(window: *Window) void {
     {
         var it = wm.seats.iterator(.forward);
         while (it.next()) |seat| {
-            if (seat.focused == window) {
+            if (seat.hovered == window) {
+                window.setBorders(wm.config.border_color_hovered);
+                break;
+            } else if (seat.focused == window) {
                 window.setBorders(wm.config.border_color_focused);
                 break;
             }