ux(classifier): revision cell previews its file; drop the count bubble

In the By-tracking table the revision name is now a preview link for its placed
file (clicking it opens the preview; hover names the original), and the per-cell
count bubble is gone — a revision is one document, so the number was noise.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

classifier/css/layout.css

@@ -614,6 +614,8 @@ input.tfile__name:focus { border-color: var(--primary); background: var(--bg); o
 }
 .tcell__name { font-weight: 600; }
 .trev__inner .tcell__name { color: var(--primary); }
+.tcell__preview { text-decoration: none; cursor: pointer; }
+.tcell__preview:hover { text-decoration: underline; }
 .ttable__cell:hover .tnode__actions, .ttable__rev:hover .tnode__actions { opacity: 1; }
 .ttable .drop-hover { outline: 2px solid var(--primary); outline-offset: -2px; }
 .ttable__file { padding: 0.1rem 0.4rem; }

classifier/js/target-tree.js

@@ -253,9 +253,18 @@
     }
     function revCellContent(node, placedMap) {
         var inner = el('div', 'tcell__inner trev__inner');
-        inner.appendChild(el('span', 'tcell__name', node.name));
-        var n = (placedMap[node.id] || []).length;
-        if (n) inner.appendChild(el('span', 'tnode__badge', String(n)));
+        // The revision name doubles as a preview link for its placed file (the
+        // common case is one file per revision). No count bubble.
+        var files = placedMap[node.id] || [];
+        if (files.length) {
+            var link = el('a', 'tcell__name tcell__preview', node.name);
+            link.href = '#';
+            link.dataset.previewKey = C().srcKeyForFile(files[0]);
+            link.title = 'Preview ' + files[0].originalFilename + (files[0].extension ? '.' + files[0].extension : '');
+            inner.appendChild(link);
+        } else {
+            inner.appendChild(el('span', 'tcell__name', node.name));
+        }
         inner.appendChild(nodeActions([
             { act: 'rename', label: '✎', title: 'Rename revision' },
             { act: 'del', label: '🗑', title: 'Delete' },
@@ -446,6 +455,16 @@
     }
     // Click a placed-file row (anywhere but its editable name) → preview it.
     function previewFromTarget(e) {
+        // Preview link on a revision cell (its placed file).
+        var pl = e.target.closest('[data-preview-key]');
+        if (pl) {
+            e.preventDefault();
+            var pf = fileByKey(pl.dataset.previewKey);
+            if (pf && window.app.modules.preview && window.app.modules.preview.previewFile) {
+                window.app.modules.preview.previewFile(pf);
+            }
+            return true;
+        }
         if (e.target.closest('.tfile__name')) return false;
         var tf = e.target.closest('.tfile');
         if (!tf || !tf.dataset.key) return false;

tests/classify.spec.js

@@ -984,3 +984,26 @@ test('By-tracking table merges shared ancestors and aligns revisions', async ({
     // The revisions live in one aligned column; the date revision stays intact.
     expect(r.revs).toEqual(['2025-11-17 (IFI)', 'A (IFR)', '0 (IFU)']);
 });
+
+test('revision cell links to preview its file and shows no count bubble', async ({ page }) => {
+    await page.click('#modeClassifyBtn');
+    const r = await page.evaluate(() => {
+        const c = window.app.modules.classify, tt = window.app.modules.targetTree;
+        c.reset();
+        const f = { originalFilename: 'foundation', extension: 'pdf', folderPath: 'Root' };
+        window.app.folderTree = [{ name: 'Root', path: 'Root', files: [f], children: [] }];
+        const leaf = c.addTrackingPath(null, c.parseFolderLevels('ACME-MECH-0001_A (IFR)'));
+        c.place([c.srcKeyForFile(f)], leaf, 'tracking');
+        tt.render();
+        const rev = document.querySelector('#trackingTree .ttable__rev');
+        const link = rev.querySelector('.tcell__preview[data-preview-key]');
+        return {
+            hasPreview: !!link,
+            previewKey: link && link.dataset.previewKey,
+            hasBadge: !!rev.querySelector('.tnode__badge'),
+        };
+    });
+    expect(r.hasPreview).toBe(true);          // revision name is a preview link
+    expect(r.previewKey).toBe('foundation.pdf');
+    expect(r.hasBadge).toBe(false);           // no count bubble
+});