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, 2 insertions, 23 deletions

diff --git a/scripts/boot-image.sh b/scripts/boot-image.sh
index 913e5cb..e8c093c 100755
--- a/scripts/boot-image.sh
+++ b/scripts/boot-image.sh
@@ -34,29 +34,8 @@ GUI=""
 DEBUG=""
 
 # ---- args ----
-while [ $# -gt 0 ]; do
-        case "$1" in
-        --gui | -g) GUI="-vga std" ;;
-        --debug | -d) DEBUG="-s -S" ;;
-        --mem)
-                shift
-                MEM="$1"
-                ;;
-        --smp)
-                shift
-                SMP="$1"
-                ;;
-        --help | -h)
-                head -20 "$0" | grep "^#" | sed 's/^# //'
-                exit 0
-                ;;
-        *)
-                echo "unknown: $1"
-                exit 1
-                ;;
-        esac
-        shift
-done
+source "$SCRIPT_DIR/lib-boot-args.sh"
+parse_boot_args "$@"
 
 # ---- build image if missing ----
 if [ ! -f "$IMAGE" ]; then