dunst: leave the rofi package to the rofi module, which the merge gate requires

Two modules on one machine may not declare the same package; the rofi module is assigned wherever
dunst is.

modules/dunst/README.md

@@ -2,8 +2,9 @@
 
 The notifier as a module (novox/hq ADR 0208, research 026/05).
 
-- Installs `dunst`, `libnotify` for `notify-send`, the client every program and these tools use, and
-  `rofi`, the context menu its `dunstrc` calls.
+- Installs `dunst`, and `libnotify` for `notify-send`, the client every program and these tools use.
+  The context menu its `dunstrc` calls is `rofi`, which the `rofi` module installs: two modules on one
+  machine may not declare the same package, so a machine dunst serves also has `rofi` assigned.
 - Claims the mesh's `node-notifier` seat and serves its verbs `send` and `history`.
 - Owns `~/.config/dunst/dunstrc` and the directory `~/.config/dunst/dunstrc.d/`. Another module's
   rule is that module's own file in the directory (ADR 0208 §4). dunst reads the directory after
@@ -89,7 +90,7 @@ count. The file keeps only the settings that differ from dunst's defaults.
 - **The context menu works.** It called `/usr/bin/dmenu`, installed on neither machine, and then
   `dmenu`, the node-launcher's command in `~/.local/bin`, which dunst did not find on the laptop
   (2026-10-10): it runs in the account's service manager, whose `PATH` does not hold that directory. It now calls `rofi -dmenu`, a
-  package this module installs.
+  system package the `rofi` module installs.
 - **A tap chooses an answer.** The answers were on the middle click only, which the laptop's and the
   workstation's touchpads cannot give (novox/hq issue 360).
 - **The face is the interface one,** Inter (research 026/04), instead of a monospace Nerd font.

modules/dunst/cmd/dunst-tools/manifest_test.go

@@ -19,8 +19,10 @@ func TestItClaimsTheNotifierSeatServingSendAndHistory(t *testing.T) {
 	if !reflect.DeepEqual(m.Claims, []claim{{Name: "node-notifier", Scope: "node", Serves: []string{"send", "history"}}}) {
 		t.Fatalf("claims: %+v", m.Claims)
 	}
-	// rofi is the context menu the dunstrc calls by name (see TheFileIsTheDecidedOne).
-	if present, absent := m.packages(); !reflect.DeepEqual(present, []string{"dunst", "libnotify", "rofi"}) || absent != nil {
+	// rofi, the context menu the dunstrc calls by name, is the rofi module's package: two modules on one
+	// machine may not declare the same package, and the rofi module holds node-launcher on every
+	// machine dunst serves.
+	if present, absent := m.packages(); !reflect.DeepEqual(present, []string{"dunst", "libnotify"}) || absent != nil {
 		t.Fatalf("packages: %v, absent %v", present, absent)
 	}
 }

modules/dunst/module.json

@@ -45,11 +45,6 @@
       "type": "package",
       "package": "libnotify"
     },
-    {
-      "id": "menu",
-      "type": "package",
-      "package": "rofi"
-    },
     {
       "id": "configuration-dir",
       "type": "directory",