feat: replace Debian Live with custom debootstrap ISO base + branding

Major ISO build overhaul on dev-iso branch:

- Replace ~800MB Debian Live download with debootstrap --variant=minbase
  (~150MB installer squashfs built from scratch)
- Custom initramfs with archipelago-mount hook for boot media detection
- Systemd service auto-starts installer (replaces profile.d hack)
- GRUB + ISOLINUX configs written from scratch (no Debian Live dependency)
- EFI boot image built with grub-mkimage (no more MBR extraction)
- Archipelago GRUB theme: dark background, Bitcoin orange accents
- Theme installed on both installer ISO and target system
- Rootfs optimizations: --no-install-recommends, strip docs/man/locales,
  remove firmware-misc-nonfree/wget/htop, add explicit font deps
- Separate CI workflow (build-iso-dev.yml) for dev-iso branch
- Includes pre-existing fixes from main (build-iso.yml, middleware, Login)

Target: sub-2GB unbundled ISO (down from 3.9GB)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/views/Login.vue

@@ -53,6 +53,7 @@
               id="setup-password"
               v-model="password"
               type="password"
+              autocomplete="new-password"
               class="w-full px-4 py-3 bg-transparent border border-white/20 rounded-lg text-white placeholder-white/40 focus:outline-none focus:border-white/40 focus:ring-1 focus:ring-white/20 transition-colors"
               :placeholder="t('login.enterPasswordSetup')"
               @keyup.enter="handleSetupWithSound"
@@ -68,6 +69,7 @@
               id="setup-confirm-password"
               v-model="confirmPassword"
               type="password"
+              autocomplete="new-password"
               class="w-full px-4 py-3 bg-transparent border border-white/20 rounded-lg text-white placeholder-white/40 focus:outline-none focus:border-white/40 focus:ring-1 focus:ring-white/20 transition-colors"
               :placeholder="t('login.confirmPasswordPlaceholder')"
               @keyup.enter="handleSetupWithSound"
@@ -151,6 +153,7 @@
               id="login-password"
               v-model="password"
               type="password"
+              autocomplete="current-password"
               class="w-full px-4 py-3 bg-transparent border border-white/20 rounded-lg text-white placeholder-white/40 focus:outline-none focus:border-white/40 focus:ring-1 focus:ring-white/20 transition-colors"
               :placeholder="t('login.enterPasswordPlaceholder')"
               @keyup.enter="handleLoginWithSound"