Implement minimal OS and Bootloader installation logic

iridium_installer/backend/disk.py

@@ -74,3 +74,28 @@ def auto_partition_disk(disk_device):
         "swap": swap_part,
         "root": root_part
     }
+
+def mount_partitions(partition_info, mount_root="/mnt"):
+    """
+    Mounts the partitions into mount_root.
+    partition_info is the dict returned by auto_partition_disk.
+    """
+    import os
+    
+    # 1. Mount Root
+    if not os.path.exists(mount_root):
+        os.makedirs(mount_root)
+    
+    run_command(["mount", partition_info["root"], mount_root])
+    
+    # 2. Mount EFI
+    efi_mount = os.path.join(mount_root, "boot/efi")
+    if not os.path.exists(efi_mount):
+        os.makedirs(efi_mount, exist_ok=True)
+    
+    run_command(["mount", partition_info["efi"], efi_mount])
+    
+    # 3. Enable Swap (optional, but might as well)
+    run_command(["swapon", partition_info["swap"]])
+    
+    logger.info(f"Partitions mounted at {mount_root}")