diff --git a/tests/browser/workspace-activity.spec.mjs b/tests/browser/workspace-activity.spec.mjs
index 7dfd2575..5f16414f 100644
--- a/tests/browser/workspace-activity.spec.mjs
+++ b/tests/browser/workspace-activity.spec.mjs
@@ -54,8 +54,8 @@ async function step(request, id, data) {
     await expect(await request.post(`/__test__/jobs/${id}/step`, { data })).toBeOK();
 }
 
-async function finish(request, id, state = 'finished') {
-    const response = await request.post(`/__test__/jobs/${id}/finish`, { data: { state } });
+async function finish(request, id, state = 'finished', extra = {}) {
+    const response = await request.post(`/__test__/jobs/${id}/finish`, { data: { state, ...extra } });
     await expect(response).toBeOK();
     return (await response.json()).job;
 }
@@ -1050,8 +1050,13 @@ test('a held legacy job and the health check show no tiles, no Results and no ma
     await expect(response).toBeOK();
     const held = (await response.json()).job;
     await page.goto(`${workspace}#/images`);
-    // D112: the pill names the held operation and shows no percentage.
+    // D112: the pill names the held operation and shows no percentage; its bar is indeterminate, not an empty fill
+    // (S5 review M5), and stays hidden from assistive tech, which reads the label.
     await expect(pill(page)).toHaveText('Thumbnail clear (gallery page)');
+    await expect(pill(page)).toHaveAttribute('aria-label', 'Thumbnail clear (gallery page)');
+    await expect(pill(page).locator('.activity-pill-bar')).toHaveClass('activity-pill-bar indeterminate');
+    await expect(pill(page).locator('.activity-pill-bar')).toHaveAttribute('aria-hidden', 'true');
+    expect(await pill(page).locator('.activity-pill-bar i').evaluate(node => node.style.width)).toBe('');
     await page.goto(`${workspace}#/activity`);
     const item = items(page).filter({ has: page.getByRole('link', { name: /Thumbnail clear \(gallery page\)$/ }) });
     await expect(item.locator('p')).toHaveText(/^Started \d\d:\d\d · closing this view does not cancel it$/);
@@ -1082,3 +1087,17 @@ test('a held legacy job and the health check show no tiles, no Results and no ma
     await finish(request, health.id);
     await expect(toast(page)).toHaveText('Health check finished.');
 });
+
+// S5 review I3: a thumbnail job with nothing to generate ends on the server's final line ("No previews to generate · N
+// already up to date"), never on a stale "Processing file 0 of 0" under the Completed chip.
+test('a finished thumbnail job with nothing to do says so', async ({ page, request }) => {
+    await page.setViewportSize({ width: 1600, height: 1100 });
+    const job = await startJob(request, { ...THUMB_JOB, total: 0 });
+    await step(request, job.id, { total: 0, processed: 0 }); // the stale line an older server left
+    await openJob(page, job.id);
+    const line = progressSection(page).locator('.panel-heading > span.small');
+    await finish(request, job.id, 'finished', { status_line: 'No previews to generate · 24 already up to date' });
+    await expect(line).toHaveText('No previews to generate · 24 already up to date');
+    await expect(page.getByText('Processing file 0 of 0')).toHaveCount(0);
+    await expect(progressSection(page).locator('progress')).toHaveAttribute('value', '100');
+});
diff --git a/tests/browser/workspace_activity_fixture.py b/tests/browser/workspace_activity_fixture.py
index 1362e260..843b80fc 100644
--- a/tests/browser/workspace_activity_fixture.py
+++ b/tests/browser/workspace_activity_fixture.py
@@ -16,7 +16,8 @@ reading files, so a test sets its progress and counters exactly:
   rows), sets ``processed`` (and ``total``) and ``counters``, then publishes
   the progress to every subscriber;
 - ``POST /__test__/jobs/{id}/finish`` ends it as ``finished``, ``cancelled``
-  or ``failed``; a cancel through the real route ends it ``cancelled``;
+  or ``failed``, with the runner's final ``status_line`` when given; a cancel
+  through the real route ends it ``cancelled``;
 - ``POST /__test__/jobs/hold`` opens a legacy-page hold (``kind``, ``title``,
   ``admission``, default ``records``): a running, non-cancellable job with no
   outcome groups, as a legacy restore, maintenance or thumbnail clear request
@@ -259,9 +260,12 @@ def register_activity_commands(app, routes, api):
     @routes.post("/__test__/jobs/{job_id}/finish")
     async def finish_job(request):
         job = job_or_404(request)
-        state = (await body(request)).get("state", "finished")
+        data = await body(request)
+        state = data.get("state", "finished")
         if state not in FINAL_STATES:
             raise web.HTTPBadRequest()
+        if isinstance(data.get("status_line"), str):  # the runner's final line
+            job.update(status_line=data["status_line"])
         ending = endings[job.id]
         if not ending.done():
             ending.set_result(state)
diff --git a/tools/vendor/frontend-coverage-baseline.json b/tools/vendor/frontend-coverage-baseline.json
index 3abaca5c..9942d6bb 100644
--- a/tools/vendor/frontend-coverage-baseline.json
+++ b/tools/vendor/frontend-coverage-baseline.json
@@ -42,10 +42,10 @@
     "statements": 98
   },
   "gallery.js": {
-    "lines": 41,
-    "branches": 63,
-    "functions": 45,
-    "statements": 41
+    "lines": 45,
+    "branches": 64,
+    "functions": 48,
+    "statements": 45
   },
   "html-escape.js": {
     "lines": 98,
@@ -181,7 +181,7 @@
   },
   "workspace/activity.mjs": {
     "lines": 96,
-    "branches": 90,
+    "branches": 91,
     "functions": 98,
     "statements": 96
   },
diff --git a/web/js/workspace/activity.mjs b/web/js/workspace/activity.mjs
index db448c51..9595f896 100644
--- a/web/js/workspace/activity.mjs
+++ b/web/js/workspace/activity.mjs
@@ -22,7 +22,7 @@ import { navigateTo } from './state.mjs';
 import { pageHeading } from './heading.mjs';
 import { showWorkspaceToast } from './toast.mjs';
 import { pillParts, outcomeLine, LOST_DETAIL } from './activity-store.mjs';
-import { viewOf, canCancel, showProgress } from './activity-kinds.mjs';
+import { viewOf, canCancel, showProgress, indeterminate } from './activity-kinds.mjs';
 
 export const ACTIVITY_DESCRIPTION = 'Scans, tagging, downloads and maintenance share one history.';
 export const EMPTY_ACTIVITY = 'No jobs have run since ComfyUI started. Scans and other long operations appear here.';
@@ -110,7 +110,10 @@ export function mountActivityTopbar({ store, scope, doc = document }) {
         const parts = pillParts(job);
         label.textContent = parts.label;
         files.textContent = parts.files;
-        fill.style.width = `${job.progress}%`;
+        // D111 (S5 review M5): no total, no fill: the bar sweeps instead of showing an empty determinate 0%.
+        const unknown = indeterminate(job);
+        bar.classList.toggle('indeterminate', unknown);
+        fill.style.width = unknown ? '' : `${job.progress}%`;
         pill.href = `#/activity/${job.id}`;
         pill.setAttribute('aria-label', parts.text);
     };
diff --git a/web/js/workspace/workspace.css b/web/js/workspace/workspace.css
index 3493342b..7c3a5aff 100644
--- a/web/js/workspace/workspace.css
+++ b/web/js/workspace/workspace.css
@@ -24,6 +24,10 @@ main:focus-visible { outline: 2px solid var(--ca-focus); outline-offset: 4px; }
 .activity-pill:hover { border-color: var(--ca-accent); /* D53 */ }
 .activity-pill-bar { display: block; inline-size: 70px; block-size: 5px; border-radius: 3px; background: var(--line); overflow: hidden; /* D53 */ }
 .activity-pill-bar i { display: block; block-size: 100%; inline-size: 0; background: var(--ca-accent); /* D53 */ }
+/* D111 (S5): a running job without a known total sweeps a short segment; reduced motion shows a dimmed full bar. */
+.activity-pill-bar.indeterminate i { inline-size: 40%; animation: activity-pill-sweep 1.4s ease-in-out infinite; /* D111 */ }
+@keyframes activity-pill-sweep { from { transform: translateX(-100%); } to { transform: translateX(250%); } }
+@media (prefers-reduced-motion: reduce) { .activity-pill-bar.indeterminate i { inline-size: 100%; opacity: .45; animation: none; /* D111 */ } }
 @media (pointer: coarse) { .activity-pill:not([hidden]) { min-block-size: 40px; /* D53 */ } }
 @media (max-width: 700px) {
     /* D52: with the Activity button the full-width row can be wider than a zoomed phone, so its items wrap. */