feat(node): skip a file the disk stops answering for, then pause its root

A Windows tester's scan stuck for good on one directory of a large disk:
one read that never returned held the indexer's only thread, and with it
every root behind that one.

- A disk call is timed by its silence, not its length: each directory
  entry listed and each megabyte read counts as an answer. After 60 s of
  silence the call is abandoned on its daemon thread, the file is noted
  unread and the scan goes on.
- Three silent files in a row pause the root (not persisted). Resume
  skips the files already known to give no answer; a restart, a replug
  or a change to the file retries them.
- The walk is per directory with os.scandir: a subdirectory that cannot
  be listed costs itself, and a listing that stops answering pauses the
  root at once. A scan no longer stats anything from the event loop.
- The log names the file after 10 s of silence, the indexing band shows
  it, and Group settings shows the paused root, where it stuck and the
  unread files with their reason, on the node's machine only.
- generate_http_api.py writes LF on Windows too.

Verified with real kernel-blocked opens (an unacknowledged oplock) in the
installed frozen app.

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

1 files changed, 8 insertions, 1 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/index-dock.js b/packages/meshbay-hub/src/meshbay_hub/static/index-dock.js
index 47a5818..3a9a539 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/index-dock.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/index-dock.js
@@ -7,6 +7,7 @@ import { useStickyBand } from './sticky.js';
 import { Icon } from './icon.js';
 import {
   fromLoopback, fromPush, mergeActivity, dockRows, hideRow, pauseRow, percent, queuedCount,
+  baseName,
 } from './index-dock-model.js';
 
 // ── Indexing dock ───────────────────────────────────────────────────────────
@@ -117,9 +118,14 @@ function DockRow({ row, error, onOpen, onPause, onHide }) {
     : t(`indexdock.kind_${row.kind || 'scan'}`);
   const where = row.root ? `${row.groupName} › ${row.root}` : row.groupName;
 
+  // A scan that sits still says what it is sitting on. It used to show a bar
+  // that had stopped, and the name of a folder.
+  const slow = !done && !error && row.slowPath;
   let meta = '';
   if (error) {
     meta = error;
+  } else if (slow) {
+    meta = t('indexdock.slow', { secs: number(row.slowSecs), file: baseName(row.slowPath) });
   } else if (listing) {
     meta = t('indexdock.listing');
   } else if (!done && !waiting) {
@@ -144,7 +150,8 @@ function DockRow({ row, error, onOpen, onPause, onHide }) {
         onClick=${onOpen}>
         <span class="index-dock-head">
           <span class="index-dock-title"><strong>${status}</strong> ${where}</span>
-          ${meta && html`<span class="index-dock-meta ${error ? 'index-dock-error' : ''}"
+          ${meta && html`<span class="index-dock-meta ${error || slow ? 'index-dock-error' : ''}"
+            title=${slow ? row.slowPath : null}
             role=${error ? 'alert' : null}>${meta}</span>`}
         </span>
         <span class="index-progress-bar index-dock-bar">