feat: implement modular foundation and core system services

- Update flake.nix with 25.11 release and core inputs
- Add dedicated modules for audio (Pipewire), bluetooth, and networking
- Update GEMINI.md with the new Modular Merging Architecture blueprint
- Configure graphical installer ISO and test VM outputs

bin/nomarchy-toggle-hybrid-gpu

@@ -1,65 +1,44 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Toggle dedicated vs integrated GPU mode via supergfxd (for hybrid gpu laptops, like Asus G14).
-# Requires reboot to take effect.
+# Declarative enablement + Runtime mode switching for Nomarchy NixOS.
 
-# Ensure supergfxctl has been installed
-if nomarchy-cmd-missing supergfxctl; then
-  nomarchy-pkg-add supergfxctl
+FEATURE_FILE="/etc/nixos/nomarchy-features/supergfxd.nix"
 
-  # Create config before starting service to prevent hang on first boot
-  sudo tee /etc/supergfxd.conf >/dev/null <<'CONF'
+if ! command -v supergfxctl &> /dev/null; then
+    sudo mkdir -p "/etc/nixos/nomarchy-features"
+    cat <<EOF | sudo tee "$FEATURE_FILE" > /dev/null
+{ config, pkgs, ... }:
 {
-  "mode": "Hybrid",
-  "vfio_enable": true,
-  "vfio_save": false,
-  "always_reboot": false,
-  "no_logind": false,
-  "logout_timeout_s": 180,
-  "hotplug_type": "None"
+  services.supergfxd.enable = true;
 }
-CONF
-
-  sudo systemctl enable --now supergfxd
+EOF
+    echo "Created $FEATURE_FILE to enable supergfxd."
+    echo "IMPORTANT: To finish enabling hybrid GPU support, add './nomarchy-features/supergfxd.nix' to your imports list in /etc/nixos/system.nix or /etc/nixos/flake.nix,"
+    echo "then run 'sys-update'."
+    exit 0
 fi
 
 gpu_mode=$(supergfxctl -g)
+echo "Current GPU mode: $gpu_mode"
 
 case "$gpu_mode" in
 "Integrated")
-  if gum confirm "Enable dedicated GPU and reboot?"; then
-    # Switch to hybrid mode
-    sudo sed -i "s/\"mode\": \".*\"/\"mode\": \"Hybrid\"/" /etc/supergfxd.conf
-
-    # Let hybrid mode be the default after system sleep
-    sudo rm -rf /usr/lib/systemd/system-sleep/force-igpu
-
-    # Remove the startup delay override (not needed for Hybrid mode)
-    sudo rm -rf /etc/systemd/system/supergfxd.service.d/delay-start.conf
-
+  if gum confirm "Switch to Hybrid mode (enables dGPU) and reboot?"; then
+    supergfxctl -m Hybrid
+    echo "Switching to Hybrid mode..."
     nomarchy-system-reboot
   fi
   ;;
 "Hybrid")
-  if gum confirm "Use only integrated GPU and reboot?"; then
-    # Switch to integrated mode and ensure vfio is enabled (needed for sleep/wake trick)
-    sudo sed -i "s/\"mode\": \".*\"/\"mode\": \"Integrated\"/" /etc/supergfxd.conf
-    sudo sed -i 's/"vfio_enable": false/"vfio_enable": true/' /etc/supergfxd.conf
-
-    # Force igpu mode after system sleep (or dgpu could get activated)
-    sudo mkdir -p /usr/lib/systemd/system-sleep
-    sudo cp -p $OMARCHY_PATH/default/systemd/system-sleep/force-igpu /usr/lib/systemd/system-sleep/
-
-    # Delay supergfxd startup to avoid race condition with display manager
-    # that can cause system freeze when booting in Integrated mode
-    sudo mkdir -p /etc/systemd/system/supergfxd.service.d
-    sudo cp -p $OMARCHY_PATH/default/systemd/system/supergfxd.service.d/delay-start.conf /etc/systemd/system/supergfxd.service.d/
-
+  if gum confirm "Switch to Integrated mode (disables dGPU) and reboot?"; then
+    supergfxctl -m Integrated
+    echo "Switching to Integrated mode..."
     nomarchy-system-reboot
   fi
   ;;
 *)
-  echo "Hybrid GPU not found or in unknown mode."
+  echo "Hybrid GPU in unknown mode: $gpu_mode. Try 'supergfxctl -m Hybrid' manually."
   exit 1
   ;;
 esac