added cosmic packages to installer. Still no auto reboot

TESTING.md

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+# Miasma OS Installer - Testing Guide
+
+## Testing in a Minimal Arch VM
+
+### Setup Test Environment
+
+1. **Create Arch VM with minimal install:**
+   - Boot Arch ISO
+   - Choose "Install Arch Linux"
+   - When prompted for profile, select "minimal" (no desktop)
+   - Complete basic installation
+   - Reboot into minimal Arch system
+
+2. **Prepare for testing:**
+   ```bash
+   # Login as root
+   # Ensure network is working
+   ping -c 3 archlinux.org
+   
+   # Install git and go (for building)
+   pacman -Sy git go base-devel
+   
+   # Clone the installer
+   git clone https://git.miasma-os.com/miasma/miasma-installer.git
+   cd miasma-installer
+   
+   # Build the installer
+   make build
+   ```
+
+3. **Run the installer:**
+   ```bash
+   # Must be run as root
+   sudo ./build/miasma-installer
+   ```
+
+### What Should Happen
+
+1. **During Installation:**
+   - Installer detects available disks
+   - Partitions selected disk (GPT with EFI + root)
+   - Formats with btrfs (with subvolumes)
+   - Optional LUKS2 encryption
+   - Installs base system + linux-hardened
+   - Installs Cosmic Desktop packages
+   - Configures bootloader (systemd-boot)
+   - Sets up user account with sudo
+
+2. **After Installation:**
+   - Installer exits cleanly
+   - Unmount filesystems: `umount -R /mnt`
+   - Reboot: `reboot`
+   - System boots into Cosmic Desktop login
+   - Login with created user credentials
+
+### For archiso Integration
+
+The installer will be included as a custom package in the archiso build:
+- ISO boots directly to root shell
+- Installer auto-starts or user runs `miasma-installer`
+- After installation completes, user reboots
+- System boots into installed Miasma OS with Cosmic Desktop
+
+### Troubleshooting
+
+If installation fails:
+- Check `/mnt` is empty before starting
+- Ensure UEFI mode: `ls /sys/firmware/efi`
+- Check disk permissions: `lsblk`
+- View detailed errors in the TUI
+- Manually unmount if needed: `umount -R /mnt`