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

2026-08-01T16:25:55Z

- 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

tty + vt terminal split, rsdosedit editor (1:1 UNIX console)

2026-07-31T15:19:09Z

Kernel now has the classic UNIX console split, so full-screen ANSI apps can run in ring 0: - vt.rs: terminal emulator owning the text screen — cell grid (char + fg/bg), logical cursor (inverse-video), scrolling, and a small ANSI CSI parser (cursor position H/f, erase J/K, moves A-D, SGR 16-colour with correct ANSI→VGA mapping, cursor show/hide ?25). Blits only changed cells; scroll shifts cell grids + pixels and re-rasterises only the exposed bottom row. gop_println!/clear_screen now render through the vt; gop.rs is the raw rasteriser (colored glyph blits, pixel shift). - tty.rs: line discipline — canonical read_line (echo, line buffer, ^C cancel, ^D EOF) moved out of the shell, and raw read_byte that translates KeyEvents to the terminal byte protocol (arrows → ESC[A-D, Backspace → 0x7f, ^X → 0x18, Ctrl+arrows → ESC[1;5A-D, Home/End/PgUp/ PgDn/Delete). interrupt_pressed() stays for streaming commands. - ps2: generic Ctrl(char) + CtrlArrow events (was: only CtrlC/CtrlD). - rsdosedit: no_std port of the RNG rsedit editor as the first real app — undo, syntax highlighting (verified green/gray/yellow on the framebuffer), search, word nav, smart indent, ^S save / ^X exit / ^X again to discard. termios → tty raw, stdout → vt, std::fs → VFS (ramfs), SIGWINCH → fixed geometry, force-exit window → key counter. - shell: 'edit ' command; read_line/strbuf moved to rsnix. - CONTEXT.md: layout + milestones + known-issue perf notes. Verified in QEMU: full edit → type → arrow-move → insert → save → exit round trip with byte-exact file content; ANSI colors via screendump.

rs-dos/rsnix/src/strbuf.rs, branch qemu

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

tty + vt terminal split, rsdosedit editor (1:1 UNIX console)