fix(display): docked idle wake + dump without SSH (#127)

Recover from DPMS/lock blackout without a second machine: undock/enable
always issue dpms on; hypridle on-resume and after_sleep run
nomarchy-display-wake (zero-output undock rescue + auto-dump).
nomarchy-display-dump writes ~/nomarchy-display-dump-*.txt (SUPER+SHIFT+D
or Ctrl+Alt+F3 TTY). HARDWARE-QUEUE #127 no longer requires SSH.

V1: nix flake check --no-build. V3: docked idle on AMD box still open.

modules/home/idle.nix

@@ -19,6 +19,52 @@ let
     done
     exit 1
   '';
+
+  # Same transition binary hyprland.nix puts on PATH — re-derived here so
+  # hypridle can pin absolute store paths (thin PATH in the user unit).
+  # Must stay in lockstep with modules/home/hyprland.nix's transition.
+  # We only need undock/enable + dpms; call via PATH-installed name is
+  # fragile, so wake embeds the transition from a minimal import chain:
+  # dump+wake live in display-tools.nix; transition is the public name
+  # on PATH after HM activation — wake script uses absolute path from
+  # a local reimplementation of just the enable/dpms rescue when the
+  # full transition package isn't injectable without circular imports.
+  #
+  # Practical approach: invoke `nomarchy-display-wake` from PATH after
+  # activation; for the unit Exec lines use a wrapper that prefers the
+  # store path of a wake script built with transition = null fallback
+  # (hyprctl keyword + reload + dpms) matching undock's public contract.
+  displayWake =
+    let
+      # Minimal undock-equivalent for idle's store path (no circular dep on
+      # hyprland.nix). Prefer the real transition when on PATH at runtime.
+      miniTransition = pkgs.writeShellScriptBin "nomarchy-display-transition" ''
+        set -u
+        case "''${1:-}" in
+          undock|enable)
+            internal="''${2:-}"
+            [ -n "$internal" ] || exit 64
+            hyprctl keyword monitor "$internal,preferred,auto,1" >/dev/null 2>&1 || true
+            if ! hyprctl monitors -j 2>/dev/null \
+                  | ${pkgs.jq}/bin/jq -e --arg m "$internal" 'any(.[]; .name == $m)' \
+                  >/dev/null 2>&1; then
+              hyprctl reload >/dev/null 2>&1 || true
+              sleep 0.5
+            fi
+            hyprctl keyword monitor "$internal,preferred,auto,1" >/dev/null 2>&1 || true
+            hyprctl dispatch dpms on >/dev/null 2>&1 || true
+            hyprctl monitors -j 2>/dev/null \
+              | ${pkgs.jq}/bin/jq -e --arg m "$internal" 'any(.[]; .name == $m)' \
+              >/dev/null 2>&1
+            ;;
+          *) exit 64 ;;
+        esac
+      '';
+    in
+    (import ./display-tools.nix {
+      inherit pkgs;
+      displayTransition = miniTransition;
+    }).displayWakeTool;
 in
 {
   config = lib.mkIf cfg.idle.enable {
@@ -111,7 +157,10 @@ in
           # can't be safely dropped after the fact — killing the locker trips
           # its "go to a tty" crash failsafe). See nomarchy-lock-before-sleep
           # in modules/nixos/default.nix.
-          after_sleep_cmd = "hyprctl dispatch dpms on";
+          # #127: not only dpms on — if dock mode left zero enabled
+          # outputs (eDP disabled + external gone/black), re-enable the
+          # internal. Absolute store path: hypridle's PATH is thin.
+          after_sleep_cmd = "${lib.getExe displayWake}";
         };
         listener = [
           # Lock and screen-off are the same on either power source —
@@ -120,7 +169,8 @@ in
           {
             timeout = 600;
             on-timeout = "hyprctl dispatch dpms off";
-            on-resume = "hyprctl dispatch dpms on";
+            # Same rescue path as after_sleep (#127).
+            on-resume = "${lib.getExe displayWake}";
           }
           # Suspend only on battery, and sooner than the old fixed 30 min
           # (it now only fires unplugged). Plugged in, the machine stays