niri: add snixembed startup and Wine tray window rule

niri/config.kdl

@@ -41,6 +41,7 @@ spawn-at-startup "wl-paste" "--watch" "cliphist" "store"
 spawn-at-startup "blueman-applet"
 spawn-at-startup "wlsunset" "-l" "49.2" "-L" "-123.1"
 spawn-at-startup "xwayland-satellite"
+spawn-at-startup "snixembed" "--no-startup-id"
 
 binds {
     Mod+Q repeat=false { close-window; }
@@ -121,6 +122,14 @@ window-rule {
     variable-refresh-rate true
 }
 
+// Wine System Tray: hide the host window, icons bridge to SNI via snixembed
+window-rule {
+    match app-id="^explorer.exe$"
+    match title="^Wine System Tray$"
+    open-floating true
+    default-floating-position x=-9999 y=-9999
+}
+
 // RuneLite (Java app-id pattern - verify with: niri msg pick-window)
 window-rule {
     match app-id="^(net-runelite-client-RuneLite|runelite|RuneLite)$"