fix(assistant): review of the Do row and fileops

The canvas: a To .md ended any other way than its own Stop (the footer
Stop, a question, a drop, a daemon restart, an older daemon refusing the
command) left the card at Working forever. The footer Stop goes through
stopOp(), asking and dropping end the operation first, a disconnect ends
it, and an error while nothing else runs is taken as its outcome. Each
fileops run gets its own Process, so a stopped run's late answer is never
read as the next one's. To .md takes one PDF, as one file is written.
Compress... no longer flips back when file(1) refines a kind, long errors
are elided, and a desktop with no documents folder gets
Documents/Assistant rather than ~/Assistant.

fileops: an animated GIF to PNG or JPEG left one file per frame under
names the rename never found; the first frame is taken. JPEG flattens
transparency onto white. Zipping a folder holding the output folder read
its own growing archive without end; only regular files outside it are
added, which also skips FIFOs and dangling links. qpdf warnings no longer
fail a merge. A folder's free name keeps its dots, a lone .gz or .xz is
decompressed rather than refused, and a dotfile's archive is not hidden.
Tools die with fileops even when it is killed outright, a killed run's
leftovers are swept on the next run, a stop between fork and bookkeeping
cannot miss the child, and a late stop cannot add a second answer.
Error lines lose bsdtar's doubled prefix and its delayed-exit noise.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/desktop/assistant/test_ops.js b/desktop/assistant/test_ops.js
index 6d53376..c016241 100644
--- a/desktop/assistant/test_ops.js
+++ b/desktop/assistant/test_ops.js
@@ -24,8 +24,8 @@ const f = (name, kind) => ({ path: "/x/" + name, name, kind });
 const labels = files => O.offered(files).map(o => o.label);
 
 assert.deepStrictEqual(labels([f("a.pdf", "pdf")]), ["To .md", "To images", "Compress…"]);
-assert.deepStrictEqual(labels([f("a.pdf", "pdf"), f("b.pdf", "pdf")]),
-                       ["To .md", "To images", "Merge", "Compress…"]);
+assert.deepStrictEqual(labels([f("a.pdf", "pdf"), f("b.pdf", "pdf")]),   // To .md: one PDF only
+                       ["To images", "Merge", "Compress…"]);
 assert.deepStrictEqual(labels([f("a.pdf", "pdf"), f("p.png", "image")]), ["Compress…"]);
 // An image's own format is not offered.
 assert.deepStrictEqual(labels([f("p.png", "image")]), ["To JPEG", "To WebP", "Resize 50%", "Compress…"]);