feat: let the operator pause and resume a root's indexing (MNP 6.2)

A whole-root walk now checks its root before every file: removed or
ejected, it stops instead of reading the drive to the end; paused, it
finishes from the hash cache alone. A paused root is not watched, not
swept by reconcile and survives a restart (roster), its indexed files
stay served. Resume runs the reconcile sweep over the root, so entries
and their enrichment are kept.

Signed root_pause / root_resume over MNP, loopback routes, CLI
`root pause|resume`, a pause button on the indexing dock and
pause/resume in the roots table of Group settings.

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

1 files changed, 20 insertions, 5 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/index-dock-model.js b/packages/meshbay-hub/src/meshbay_hub/static/index-dock-model.js
index bd4586b..ed81e7c 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/index-dock-model.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/index-dock-model.js
@@ -91,8 +91,9 @@ function loud(job, since, now) {
  *
  * `memory` is per group: when the current walk was first seen, whether its row
  * has been shown (a burst that crossed the threshold stays up until it ends),
- * whether the operator hid it, and when it finished. Pure: same arguments, same
- * answer, so a render that runs twice does not flash anything twice.
+ * whether the operator hid it, which walk they paused, and when it finished.
+ * Pure: same arguments, same answer, so a render that runs twice does not flash
+ * anything twice.
  */
 export function dockRows(jobs, memory, now) {
   const next = {};
@@ -105,9 +106,12 @@ export function dockRows(jobs, memory, now) {
       const since = prev.busy && prev.sig === sig ? prev.since : now;
       const shown = Boolean(prev.busy && prev.shown) || loud(job, since, now);
       const hidden = Boolean(prev.busy && prev.hidden);
-      next[gid] = { busy: true, sig, since, shown, hidden, doneAt: 0 };
-      if (shown && !hidden) rows.push({ ...job, state: 'running' });
-    } else if (prev.busy && prev.shown && !prev.hidden) {
+      // The node takes a moment to stop, and may go on to the next root
+      // queued: only the walk that was paused stays off screen.
+      const paused = prev.busy && prev.pausedSig === sig ? sig : '';
+      next[gid] = { busy: true, sig, since, shown, hidden, pausedSig: paused, doneAt: 0 };
+      if (shown && !hidden && !paused) rows.push({ ...job, state: 'running' });
+    } else if (prev.busy && prev.shown && !prev.hidden && !prev.pausedSig) {
       next[gid] = { busy: false, doneAt: now };
       rows.push({ ...job, state: 'done' });
     } else if (prev.doneAt && now - prev.doneAt < DONE_MS) {
@@ -124,3 +128,14 @@ export function hideRow(memory, groupId) {
   if (!prev || !prev.busy) return memory;
   return { ...memory, [groupId]: { ...prev, hidden: true } };
 }
+
+/**
+ * The operator paused the walk this row shows. Its row goes at once rather than
+ * when the node's next report arrives, and no "finished" follows it — the root
+ * is not finished, it is paused, and its settings row says so.
+ */
+export function pauseRow(memory, groupId) {
+  const prev = memory[groupId];
+  if (!prev || !prev.busy) return memory;
+  return { ...memory, [groupId]: { ...prev, pausedSig: prev.sig } };
+}