fix: restore user-mode libvirt (no sudo) and fix preseed partitioning

Two critical fixes in this commit:

1. VM Creation Regression (13139f2):
   - Restored qemu:///session (user mode) from qemu:///system (root mode)
   - Changed storage paths from /var/lib/libvirt/images to ~/.local/share/libvirt/images
   - Removed all sudo calls from vm_create and vm_destroy functions
   - Updated test to expect session URI

2. Preseed Partitioning Fix:
   - Added GPT partition table directives
   - Added LVM confirmation settings
   - Fixed EFI partition syntax per Debian official example
   - Fixed /boot max size from 512 to 1024
   - KEY FIX: Added 'partman-auto/choose_recipe select efi-boot-root'

Additional changes:
- Added LICENSE file (GNU AGPL v3.0 only)
- Updated AGENTS.md to enforce auto-commit/push behavior

💘 Generated with Crush

Assisted-by: GLM-4.7 via Crush <crush@charm.land>

config/includes.installer/preseed.cfg

@@ -50,23 +50,33 @@ d-i passwd/user-default-groups string audio,video,plugdev,input,cdrom,floppy
 
 # Partitioning (LUKS full disk encryption - MANDATORY)
 # For UEFI systems, we need: EFI System Partition, /boot, encrypted LUKS+LVM
+
+# Force GPT partition table for UEFI
+d-i partman-partitioning/choose_label select gpt
+d-i partman-partitioning/default_label string gpt
+
 d-i partman-auto/disk string /dev/sda
 d-i partman-auto/method string crypto
+
+# LVM configuration
 d-i partman-auto-lvm/device_remove_lvs boolean true
 d-i partman-auto-lvm/device_remove_lvs_span boolean true
 d-i partman-auto-lvm/guided_size string max
 d-i partman-auto-lvm/new_vg_name string knel_vg
+d-i partman-lvm/device_remove_lvm boolean true
+d-i partman-lvm/confirm boolean true
+d-i partman-lvm/confirm_nooverwrite boolean true
 
 # Expert recipe for UEFI + encrypted LVM
 # Structure: ESP (EFI) -> /boot -> LUKS encrypted container -> LVM VG -> root + swap
 d-i partman-auto/expert_recipe string                         \
       efi-boot-root ::                                         \
-              256 512 512 fat32                                \
-                      $primary{ }                              \
+              538 538 1075 free                                \
+                      $iflabel{ gpt }                          \
+                      $reusemethod{ }                          \
                       method{ efi } format{ }                  \
-                      use_filesystem{ } filesystem{ fat32 }    \
               .                                               \
-              512 1024 512 ext4                                \
+              512 1024 1024 ext4                               \
                       $primary{ } $bootable{ }                \
                       method{ format } format{ }              \
                       use_filesystem{ } filesystem{ ext4 }    \
@@ -87,6 +97,9 @@ d-i partman-auto/expert_recipe string                         \
                       method{ swap } format{ }                \
               .
 
+# Select our custom recipe
+d-i partman-auto/choose_recipe select efi-boot-root
+
 # LUKS encryption configuration (AES-XTS, 256-bit key)
 # NOTE: Passphrase will be prompted during installation
 # REQUIREMENTS: 14+ characters, mix of upper/lower/digits/special