fix(nixos): improve waybar network display

configs/nixos/modules/desktop/session/waybar.nix

@@ -47,6 +47,38 @@ let
       printf '{"text":"","class":"idle"}\n'
     fi
   '';
+
+  networkStatus = pkgs.writeShellScript "waybar-network-status" ''
+    active=$(
+      ${pkgs.networkmanager}/bin/nmcli -t -f DEVICE,TYPE,STATE,CONNECTION device status \
+        | ${pkgs.gawk}/bin/awk -F: '$3 == "connected" && $2 != "loopback" { print; exit }'
+    )
+
+    if [ -z "$active" ]; then
+      ${pkgs.jq}/bin/jq -cn \
+        --arg text "${g "f127"} off" \
+        --arg tooltip "Network disconnected" \
+        --arg class "disconnected" \
+        '{ text: $text, tooltip: $tooltip, class: $class }'
+      exit 0
+    fi
+
+    IFS=: read -r device type _state connection <<< "$active"
+
+    case "$type" in
+      wifi) icon="${g "f1eb"}" ;;
+      ethernet) icon="LAN" ;;
+      *) icon="NET" ;;
+    esac
+
+    ipaddr=$(${pkgs.iproute2}/bin/ip -4 -o addr show dev "$device" | ${pkgs.gawk}/bin/awk '{ print $4; exit }')
+
+    ${pkgs.jq}/bin/jq -cn \
+      --arg text "$icon $connection" \
+      --arg tooltip "$device: ''${ipaddr:-no IPv4}" \
+      --arg class "$type" \
+      '{ text: $text, tooltip: $tooltip, class: $class }'
+  '';
 in
 {
   options.modules.desktop.session.waybar.enable = lib.mkEnableOption "the Waybar status bar";
@@ -63,10 +95,21 @@ in
       # so the bar comes up with the session and no compositor exec-once.
       systemd.enable = true;
 
+      style = ''
+        .modules-right {
+          margin-right: 8px;
+        }
+
+        #custom-dnd {
+          margin-right: 8px;
+        }
+      '';
+
       settings.mainBar = {
         layer = "top";
         position = "top";
         height = 30;
+        spacing = 8;
 
         modules-left = [ "hyprland/workspaces" ];
         modules-center = [ "clock" ];
@@ -75,7 +118,7 @@ in
           "custom/idle-lock"
           "mpris"
           "wireplumber"
-          "network"
+          "custom/network"
           "battery"
           "custom/dnd"
         ];
@@ -128,11 +171,10 @@ in
           on-click = "${pkgs.wireplumber}/bin/wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle";
         };
 
-        network = {
+        "custom/network" = {
-          format-wifi = "${g "f1eb"} {essid}";
+          return-type = "json";
-          format-ethernet = "${g "f796"} {ifname}";
+          exec = "${networkStatus}";
-          format-disconnected = "${g "f127"} off";
+          interval = 5;
-          tooltip-format = "{ipaddr} via {gwaddr}";
         };
 
         battery = {