feat: Move bootstrap/build-liveusb scripts to flake apps

- Move bootstrap.sh to scripts/ and add as flake app
- Move build-liveusb.sh to scripts/ and add as flake app
- Update usage comments to show nix run commands
- Improve build-liveusb.sh with better error handling (set -euo pipefail)
- Remove emojis from output messages for cleaner log output

Scripts can now be run consistently via:
  nix run .#bootstrap -- <hostname>
  nix run .#build-liveusb

Implements bead: nixos-configs-bli

build-liveusb.sh

@@ -1,19 +0,0 @@
-#!/usr/bin/env bash
-
-# Build Live USB ISO from flake configuration
-# Creates an uncompressed ISO suitable for Ventoy and other USB boot tools
-
-set -e
-
-echo "Building Live USB ISO..."
-nix build .#nixosConfigurations.live-usb.config.system.build.isoImage --show-trace
-
-if [ -f "./result/iso/"*.iso ]; then
-    iso_file=$(ls ./result/iso/*.iso)
-    echo "✅ Build complete!"
-    echo "📁 ISO location: $iso_file"
-    echo "💾 Ready for Ventoy or dd to USB"
-else
-    echo "❌ Build failed - no ISO file found"
-    exit 1
-fi

flake.nix

@@ -275,6 +275,16 @@
           export PATH="${pkgs.lib.makeBinPath commonDeps}:$PATH"
           ${builtins.readFile ./scripts/upgrade.sh}
         '';
+
+        bootstrap = pkgs.writeShellScriptBin "bootstrap" ''
+          export PATH="${pkgs.lib.makeBinPath commonDeps}:$PATH"
+          ${builtins.readFile ./scripts/bootstrap.sh}
+        '';
+
+        build-liveusb = pkgs.writeShellScriptBin "build-liveusb" ''
+          export PATH="${pkgs.lib.makeBinPath commonDeps}:$PATH"
+          ${builtins.readFile ./scripts/build-liveusb.sh}
+        '';
       in {
         update-doomemacs = {
           type = "app";
@@ -292,6 +302,14 @@
           type = "app";
           program = "${upgrade}/bin/upgrade";
         };
+        bootstrap = {
+          type = "app";
+          program = "${bootstrap}/bin/bootstrap";
+        };
+        build-liveusb = {
+          type = "app";
+          program = "${build-liveusb}/bin/build-liveusb";
+        };
       }
     );
   };

scripts/bootstrap.sh

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 # bootstrap.sh
-# Usage: sudo ./bootstrap.sh <hostname>
+# Usage: nix run .#bootstrap -- <hostname>
+# Or: sudo ./scripts/bootstrap.sh <hostname>
 set -euo pipefail
 
 NEW_HOSTNAME="${1:?missing hostname}"
@@ -8,4 +9,3 @@ FLAKE_URI="git+https://git.johnogle.info/johno/nixos-configs.git#${NEW_HOSTNAME}
 
 export NIX_CONFIG="experimental-features = nix-command flakes"
 nixos-rebuild switch --flake "$FLAKE_URI"
-

scripts/build-liveusb.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# Build Live USB ISO from flake configuration
+# Creates an uncompressed ISO suitable for Ventoy and other USB boot tools
+# Usage: nix run .#build-liveusb
+# Or: ./scripts/build-liveusb.sh
+
+set -euo pipefail
+
+REPO_ROOT="${REPO_ROOT:-$(git rev-parse --show-toplevel 2>/dev/null || pwd)}"
+
+echo "Building Live USB ISO..."
+nix build "${REPO_ROOT}#nixosConfigurations.live-usb.config.system.build.isoImage" --show-trace
+
+if ls "${REPO_ROOT}/result/iso/"*.iso 1> /dev/null 2>&1; then
+    iso_file=$(ls "${REPO_ROOT}/result/iso/"*.iso)
+    echo "Build complete!"
+    echo "ISO location: $iso_file"
+    echo "Ready for Ventoy or dd to USB"
+else
+    echo "Build failed - no ISO file found"
+    exit 1
+fi