fix pi-lens warnings: unwraps, shell SC2046, dup code (fmtbuf/scripts/hexdump/cat/ahci/pci)

- memory.rs: self-test Layout::from_size_align no longer panics — the
  test fails cleanly on an invalid layout
- fat.rs: v() no longer unwraps the active-volume slot — invariant
  violation logs + halts instead of panicking mid-disk-io
- strbuf: shared FmtBuf replaces the duplicated PanicBuf/FmtBuf
  (main.rs + sched.rs)
- test-disk.sh: SC2046 — conditional --fresh arg no longer relies on
  word splitting
- scripts: boot.sh/boot-image.sh share lib-boot-args.sh (dup args loop)
- shell: cat/hexdump stdin pairs unified with Option<&str> marker;
  hexdump format_row folded into format_partial
- ahci: read/write_sectors unified behind dma_sectors
- pci: config_read/write share config_addr

1 files changed, 5 insertions, 1 deletions

diff --git a/scripts/test-disk.sh b/scripts/test-disk.sh
index 11a9b05..0268fff 100755
--- a/scripts/test-disk.sh
+++ b/scripts/test-disk.sh
@@ -72,7 +72,11 @@ cargo build --package rsdos --target x86_64-unknown-uefi
 echo "==> 2/6 deploy to ESP + ensure disk image"
 mkdir -p "$ESP_DIR/EFI/BOOT"
 cp target/x86_64-unknown-uefi/debug/rsdos.efi "$ESP_DIR/EFI/BOOT/BOOTX64.EFI"
-"$SCRIPT_DIR/mkdisk.sh" $([ "$FRESH" -eq 1 ] && echo --fresh) "$IMG"
+if [ "$FRESH" -eq 1 ]; then
+        "$SCRIPT_DIR/mkdisk.sh" --fresh "$IMG"
+else
+        "$SCRIPT_DIR/mkdisk.sh" "$IMG"
+fi
 
 echo "==> 3/6 boot QEMU (headless)"
 kill "$(cat "$QPID" 2>/dev/null)" 2>/dev/null || true