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, 9 insertions, 2 deletions

diff --git a/desktop/assistant/Card.qml b/desktop/assistant/Card.qml
index 069d3a0..f4dc71d 100644
--- a/desktop/assistant/Card.qml
+++ b/desktop/assistant/Card.qml
@@ -310,7 +310,10 @@ Rectangle {
     // Do: local operations (Ops.js, run by fileops or the daemon's write).
     // Compress… swaps the group for its formats. Hidden while one runs.
     property bool compressing: false
-    Connections { target: card.canvas; function onStagedChanged() { card.compressing = false; } }
+    // Only a different set of files resets it: refine() re-assigns staged
+    // when file(1) answers, which is not a change of files.
+    readonly property string stagedPaths: card.canvas.staged.map(f => f.path).join("\n")
+    onStagedPathsChanged: card.compressing = false
 
     Group {
         id: dos
@@ -341,6 +344,9 @@ Rectangle {
 
         Text {
             anchors.verticalCenter: parent.verticalCenter
+            // Bounded: an error can run to 300 characters.
+            width: Math.min(implicitWidth, card.width - 28 - status.spacing * 3 - 220)
+            elide: Text.ElideRight
             text: status.c.opRunning
                 ? (status.c.opDaemon && status.c.opChars
                    ? `${status.c.opLabel}… ${(status.c.opChars / 1000).toFixed(1)}k characters`
@@ -501,7 +507,8 @@ Rectangle {
             danger: card.canvas.busy
             enabled: card.canvas.connected && (card.canvas.busy || !card.canvas.blocked)
             onClicked: {
-                if (card.canvas.busy) card.canvas.send({ type: "stop" });
+                if (card.canvas.opRunning) card.canvas.stopOp();
+                else if (card.canvas.busy) card.canvas.send({ type: "stop" });
                 else if (card.canvas.ask(input.text)) input.text = "";
                 input.forceActiveFocus();
             }