Word Unperfect - XT-Emporium

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# unix-word-unperfect

This is a Unix-host build of `word unperfect` that leaves the DOS/OpenWatcom
port alone.  By default it starts the shared WordPerfect-style 80x25 TUI through
the Linux terminal adapter.  File, print, export, and fallback line-editor paths
use standard libc `stdio`.

Build:

```sh
make
```

Smoke test:

```sh
make smoke
```

Run the WordPerfect-style Linux TUI:

```sh
./build/unix-word-unperfect
./build/unix-word-unperfect ../wp_c/WP51/LEARN/MEMO.WKB
```

The Linux TUI fits the host terminal at render time.  It detects the terminal
size directly, falls back to `COLUMNS` and `LINES` when output is redirected,
centers the classic screen on larger terminals, clips without wrapping on narrow
terminals, and keeps the command/status rows visible on short terminals.
All Unix file prompts and status rows use normal POSIX path syntax such as
`../wp_c/WP51/LEARN/MEMO.WKB` or `/home/user/doc.wp`; the Unix build does not
wrap host paths in simulated DOS drive letters.

Run the libc stdio fallback editor:

```sh
./build/unix-word-unperfect --stdio
```

Other commands:

```sh
./build/unix-word-unperfect --export ../wp_c/WP51/LEARN/MEMO.WKB memo.txt
./build/unix-word-unperfect --print ../wp_c/WP51/LEARN/MEMO.WKB /dev/lp0
./build/unix-word-unperfect --analyze ../wp_c/WP51/LEARN/MEMO.WKB
./build/unix-word-unperfect --roundtrip in.wp out.wp
./build/unix-word-unperfect --new out.wp "Hello"
./build/unix-word-unperfect --append in.wp out.wp "More text"
```

Printer output:

- `--print IN [LPT]` exports document text and writes it to the given LPT
  device/file with a final form feed byte.
- If `[LPT]` is omitted, the program uses `WORD_UNPERFECT_LPT` when set, or
  `/dev/lp0` by default.
- The `smoke` target writes printer output to `build/fake-lpt0` so it can run
  without printer hardware attached.

Scope:

- Uses libc `fopen`, `fread`, `fwrite`, `fclose`, `fgets`, `fputs`, `printf`,
  and memory allocation.
- Reuses the existing portable parser, file preservation, text export, analyzer,
  editable document model, display buffer, layout renderer, and live TUI
  frontend.
- Builds the shared frontend on the non-Watcom Linux path for the TUI.
- Does not build `rev/wp_dos_runtime_adapter.c`, `rev/wp_shell_console.c`, or
  `rev/wp_corpus_validator.c`.
- Does not edit the existing DOS port.

License:

Word Unperfect is distributed under the Word Unperfect XT-Emporium License.
It is MIT-like for non-commercial personal, educational, preservation, and
research use. Commercial use requires prior written permission from the
XT-Emporium.com site owner; contact the owner through https://xt-emporium.com/.
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