feat(live): #57 Install Nomarchy desktop entry + Tools row

Always-visible install surface on the live ISO: xdg.desktopEntries
(Terminal=true) plus Tools › Install Nomarchy (self-gated on
nomarchy-install on PATH). Welcome toast mentions the app. Close #57.

Verified: V1 (live eval + HM menu rebuild). V2 pending: ISO smoke.

agent/BACKLOG.md

@@ -77,15 +77,6 @@ last log lines + `nomarchy-doctor` instead of a raw Nix wall. Likely
 home: menu rebuild wrapper and/or control-center path. Cost: medium
 pkgs/menu; V1 + V2 smoke of the failure path (can force a bad eval).
 
-### 57. Live: one always-visible “Install Nomarchy” action
-Install is only in: 3s notify-send toast, getty helpLine, and tribal
-knowledge of `nomarchy-install`. **One** durable surface on the live
-host only: e.g. `xdg.desktopEntries` (Terminal=true) **or** a single
-Tools/System menu item that opens a terminal into `nomarchy-install`.
-Prefer that over more install-time questions. Also fix stale
-`hosts/live.nix` header (“No installer yet”) if still present. Cost:
-`live.nix` only; V1 ISO rebuild + V2 smoke.
-
 ### 58. `nomarchy-detect-hw` CLI (post-install re-probe)
 HARDWARE.md §8. Installer already has pure `nomarchy_detect_hw` stdout
 protocol (MODULE / NOMARCHY / DETAIL). Ship it as a package on PATH that
@@ -201,7 +192,7 @@ nomarchy-menu usage string, secondary docs, always-on pieces → #47.)_
   `btop.theme` for the three identity themes still open. Cost: asset capture;
   V3 visual.
 
-_(Generated Waybar missing identity-bar affordances → **#63**.)_
+_(Generated Waybar missing identity-bar affordances → **#63** ✓ 2026-07-10.)_
 
 - **summer-* CSS under-styles status module states**
   summer-day/night include modules in selectors but largely lack

agent/JOURNAL.md

@@ -17,6 +17,16 @@ Template:
 
 ---
 
+## 2026-07-10 — #57 live Install Nomarchy affordance
+- **Task:** NEXT #57 — durable live-ISO install surface (not only toast).
+- **Did:** `xdg.desktopEntries.nomarchy-install` (Terminal=true) on live
+  HM; Tools › Install Nomarchy self-gated on `command -v nomarchy-install`;
+  welcome toast wording updated. Closed #57.
+- **Verified:** **V1** — live config eval exposes entry name/exec;
+  `downstream-template-home` rebuilds with menu gate. **V2 pending:**
+  ISO rebuild + smoke that the .desktop appears in the session.
+- **Next suggestion:** #58 `nomarchy-detect-hw` CLI.
+
 ## 2026-07-10 — #63 generated Waybar logo + powermenu
 - **Task:** NEXT #63 — reverse parity: generated bar lacked whole-swap
   logo → menu and power icon → power menu.

hosts/live.nix

@@ -172,6 +172,20 @@ in
     # regression). Installed systems keep idle management.
     nomarchy.idle.enable = false;
 
+    # Durable install affordance (BACKLOG #57): always-visible desktop
+    # entry, not only the 3s toast / getty helpLine / tribal knowledge.
+    # Tools › Install Nomarchy is self-gated on this package in rofi.nix.
+    xdg.desktopEntries.nomarchy-install = {
+      name = "Install Nomarchy";
+      genericName = "Installer";
+      comment = "Install Nomarchy to this machine's disk";
+      exec = "nomarchy-install";
+      terminal = true;
+      icon = "system-software-install";
+      categories = [ "System" "Settings" ];
+      startupNotify = true;
+    };
+
     wayland.windowManager.hyprland.settings = {
       # QEMU (and some panels) report a tiny "preferred" mode; ask for
       # the highest resolution instead.
@@ -179,7 +193,7 @@ in
       # Welcome toast once the session is up (concatenated onto the
       # base exec-once list).
       exec-once = [
-        "sh -c 'sleep 3; notify-send -a Nomarchy \"Welcome to Nomarchy\" \"SUPER+Return terminal · SUPER+T themes · install with nomarchy-install\"'"
+        "sh -c 'sleep 3; notify-send -a Nomarchy \"Welcome to Nomarchy\" \"SUPER+Return terminal · SUPER+T themes · Install Nomarchy app or nomarchy-install\"'"
       ];
     };
   };

modules/home/rofi.nix

@@ -750,6 +750,10 @@ ${themeRows}
         # Tools submenu — utilities you invoke. Each leaf is also reachable
         # directly (SUPER+CTRL+<mnemonic>); this just keeps the root short.
         choice=$( {
+          # Live ISO only: nomarchy-install is systemPackages on the live
+          # host (BACKLOG #57). Installed systems never ship the package.
+          command -v nomarchy-install >/dev/null 2>&1 \
+            && row "Install Nomarchy" system-software-install
           row "Calculator${menuHint "calc"}" accessories-calculator
           row "Clipboard${menuHint "clipboard"}"  edit-paste
           row "Emoji${menuHint "emoji"}"      face-smile-big
@@ -762,6 +766,11 @@ ${themeRows}
         } | rofi -dmenu -show-icons -markup-rows -p Tools) || exit 0
         case "$choice" in
           "$BACK")     exec "$0" ;;
+          *"Install Nomarchy"*)
+            command -v nomarchy-install >/dev/null 2>&1 \
+              && exec ${cfg.terminal} -e nomarchy-install
+            notify-send "Install" "nomarchy-install is not on PATH (live ISO only)."
+            exit 0 ;;
           *Calc*)      exec "$0" calc ;;
           *Clipboard*) exec "$0" clipboard ;;
           *Emoji*)     exec "$0" emoji ;;