Scaffold BOS repo: dotfiles, ISO profile, and bos-settings GTK4 app

Implements all four components from the BOS spec:
- dotfiles/: default Hyprland, bread, breadbox, breadcrumbs configs
- iso/: archiso profiledef, package list, Calamares YAML modules, post-install.sh
- bos-settings/: Cargo workspace with GTK4 settings app (8 views: snapshots,
  packages, bread, breadbar, breadbox, breadcrumbs, breadpad, hyprland)

https://claude.ai/code/session_01WszGHvCmxgcyTwNSkfLF9P

iso/airootfs/etc/calamares/modules/bootloader.conf

@@ -0,0 +1,9 @@
+---
+efiBootloaderId: "BOS"
+installEFIFallback: true
+grubInstall: "grub-install"
+grubMkconfig: "grub-mkconfig"
+grubCfg: "/boot/grub/grub.cfg"
+grubProbe: "grub-probe"
+efiDirectory: "/boot/efi"
+kernel: ""

iso/airootfs/etc/calamares/modules/finished.conf

@@ -0,0 +1,5 @@
+---
+restartNowEnabled: true
+restartNowChecked: true
+restartNowCommand: "systemctl reboot"
+notifyOnFinished: false

iso/airootfs/etc/calamares/modules/keyboard.conf

@@ -0,0 +1,2 @@
+---
+xorgConfDir: "/etc/X11/xorg.conf.d"

iso/airootfs/etc/calamares/modules/locale.conf

@@ -0,0 +1,5 @@
+---
+region: "America"
+zone: "New_York"
+localeGenPath: "/etc/locale.gen"
+geoipUrl: "https://geoip.kde.org/v1/calamares"

iso/airootfs/etc/calamares/modules/packages.conf

@@ -0,0 +1,10 @@
+---
+backend: pacman
+
+options:
+  - update_db: true
+
+operations:
+  - try_install:
+    - pipewire-pulse
+    - pipewire-alsa

iso/airootfs/etc/calamares/modules/partition.conf

@@ -0,0 +1,29 @@
+---
+efiSystemPartition: "/boot/efi"
+efiSystemPartitionSize: "512M"
+efiSystemPartitionName: "EFI"
+
+defaultFileSystemType: "btrfs"
+
+btrfsSubvolumes:
+  - mountPoint: /
+    subvolume: "@"
+    mountOptions: "noatime,compress=zstd,space_cache=v2"
+  - mountPoint: /home
+    subvolume: "@home"
+    mountOptions: "noatime,compress=zstd,space_cache=v2"
+  - mountPoint: /.snapshots
+    subvolume: "@snapshots"
+    mountOptions: "noatime,compress=zstd,space_cache=v2"
+  - mountPoint: /var/log
+    subvolume: "@log"
+    mountOptions: "noatime,compress=zstd,space_cache=v2"
+  - mountPoint: /var/cache
+    subvolume: "@cache"
+    mountOptions: "noatime,compress=zstd,space_cache=v2"
+
+userSwapChoices:
+  - none
+  - small
+  - suspend
+  - file

iso/airootfs/etc/calamares/modules/shellprocess.conf

@@ -0,0 +1,3 @@
+---
+script:
+  - "-/usr/bin/bash /etc/calamares/post-install.sh"

iso/airootfs/etc/calamares/modules/users.conf

@@ -0,0 +1,40 @@
+---
+defaultGroups:
+  - name: users
+    must_exist: true
+    system: false
+  - name: lp
+    must_exist: false
+    system: true
+  - name: video
+    must_exist: false
+    system: true
+  - name: network
+    must_exist: false
+    system: true
+  - name: storage
+    must_exist: false
+    system: true
+  - name: wheel
+    must_exist: false
+    system: true
+  - name: audio
+    must_exist: false
+    system: true
+  - name: input
+    must_exist: false
+    system: true
+
+autologinGroup: autologin
+doAutologin: false
+sudoersGroup: wheel
+setRootPassword: false
+doReusePassword: true
+
+passwordRequirements:
+  minLength: 6
+  maxLength: -1
+  libpwquality:
+    - minlen=6
+
+allowWeakPasswords: false

iso/airootfs/etc/calamares/modules/welcome.conf

@@ -0,0 +1,11 @@
+---
+showSupportUrl: false
+showKnownIssuesUrl: false
+showReleaseNotesUrl: false
+
+requirements:
+  requiredStorage: 20
+  requiredRam: 2.0
+  checkInternet: true
+  checkPower: true
+  internetCheckUrl: "https://archlinux.org"