revert: always include vmsilo-tray in guest rootfs

The guest-side tray daemon is harmless when idle and keeping it in
the rootfs allows all VMs to share the same image regardless of
tray.enable.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

README.md

@@ -171,6 +171,7 @@ There are a lot of configuration options but you don't really need to touch most
 | `color` | string | `"darkred"` | Window decoration color (named color or hex, e.g., `"#2ecc71"`) |
 | `network.nameservers` | list of strings | `[]` | DNS nameservers for this VM |
 | `network.interfaces` | attrset of interface configs | `{}` | Network interfaces (keys are guest-visible names) |
+| `tray.enable` | bool | `false` | Enable tray proxy for this VM (proxies guest SNI tray items to host system tray) |
 | `autoShutdown.enable` | bool | `false` | Auto-shutdown when idle (after `autoShutdown.after` seconds) |
 | `autoShutdown.after` | int | `60` | Seconds to wait before shutdown |
 | `autoStart` | bool | `false` | Start VM automatically (GPU VMs: on session start; non-GPU VMs: at boot) |
@@ -575,7 +576,7 @@ The host provides:
 
 ### Tray Integration
 
-VM system tray applets (StatusNotifierItems like nm-applet, bluetooth, etc.) automatically appear in the host KDE system tray. No configuration needed — tray proxying is always enabled.
+VM system tray applets (StatusNotifierItems like nm-applet, bluetooth, etc.) can appear in the host KDE system tray. Enable per VM with `tray.enable = true`.
 
 - Tray items are prefixed with the VM name (e.g., `[banking] NetworkManager`)
 - User interactions (clicks, scrolls, context menus) are forwarded back to the guest app

modules/options.nix

@@ -251,6 +251,20 @@ let
           '';
         };
 
+        tray = lib.mkOption {
+          type = lib.types.submodule {
+            options = {
+              enable = lib.mkOption {
+                type = lib.types.bool;
+                default = false;
+                description = "Enable host-side tray proxy for this VM. Proxies guest SNI tray items to the host system tray.";
+              };
+            };
+          };
+          default = { };
+          description = "Tray proxy configuration for this VM.";
+        };
+
         autoShutdown = lib.mkOption {
           type = lib.types.submodule {
             options = {

modules/services.nix

@@ -478,7 +478,7 @@ in
         # Tray proxy services (crosvm VMs only — kernel vsock required)
         lib.concatMap (
           vm:
-          lib.optional (vm.hypervisor == "crosvm") (
+          lib.optional (vm.tray.enable && vm.hypervisor == "crosvm") (
             lib.nameValuePair "vmsilo-${vm.name}-tray" {
               description = "Tray proxy for VM ${vm.name}";
               wantedBy = [ "vmsilo-${vm.name}-vm.service" ];