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, 6 insertions, 2 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/group-page.js b/packages/meshbay-hub/src/meshbay_hub/static/group-page.js
index 48b1c80..3e3b483 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/group-page.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/group-page.js
@@ -510,6 +510,9 @@ function GroupPage({ groupId, group, token, username, userId, userPrefs,
             setNodeRoots(msg.roots);
           }
         };
+        // The dock's pause button, for a node that is not on this machine.
+        const pauseFromDock = (rootName) =>
+          transport.pauseRoot(groupId, rootName, transport.signFn);
         // The node's own scan (a root added while we were already connected,
         // or reconcile catching one back up) — never the entries, just
         // enough to animate the sidebar dot. Guaranteed a final push at the
@@ -526,7 +529,7 @@ function GroupPage({ groupId, group, token, username, userId, userPrefs,
           // The operator's indexing dock. The push names no root, so the
           // page that opened the roots table names it.
           if (transport.memberRole === 'operator') {
-            reportIndexPush(groupId, status, nodeRootsRef.current);
+            reportIndexPush(groupId, status, nodeRootsRef.current, pauseFromDock);
           }
         };
         setOperatorPaired(transport.memberRole === 'operator');
@@ -637,7 +640,8 @@ function GroupPage({ groupId, group, token, username, userId, userPrefs,
           }
         }
         if (transport.memberRole === 'operator' && ack.indexing) {
-          reportIndexPush(groupId, ack.indexing, indexMsg.roots || nodeRootsRef.current);
+          reportIndexPush(groupId, ack.indexing, indexMsg.roots || nodeRootsRef.current,
+                          pauseFromDock);
         }
       } catch (err) {
         if (cancelled) return;