tabs.js + docs: drop #272 + #275 cookies (#712 batch 8)

#272 (show approval requested-at — closed) ×2 in tabs.js (live
ApprovalAdded fallback note + amber stale chip comment) + ×1 in
docs/web-ui.md (Approval card identity header). #275 (select all
for meta inputs — closed) ×1 in tabs.js (bulk-select rationale)
+ ×1 in docs/web-ui.md (M3T4 1NPUTS tree control note). The
amber-stale chip line in tabs.js now points at
docs/web-ui.md::Approval card for the rendered spec instead of
the closed issue.

frontend/packages/dashboard/src/tabs.js

@@ -1446,7 +1446,7 @@ window.marked = marked;
       // The ApprovalAdded event carries no requested_at; a live-added
       // approval was queued just now, so client-now is accurate — and
       // consistent with how fmtAgo compares everything to client-now.
-      // A later /api/state cold-load swaps in the server value. (#272)
+      // A later /api/state cold-load swaps in the server value.
       requested_at: ev.requested_at != null
         ? ev.requested_at : Math.floor(Date.now() / 1000),
     };
@@ -1627,7 +1627,7 @@ window.marked = marked;
       if (isApply && a.sha_short) head.append(el('code', {}, a.sha_short));
       // When the approval was requested — relative time, right-aligned.
       // Goes amber once it's been pending an hour so a stale request is
-      // obvious at a glance. (issue #272)
+      // obvious at a glance (see docs/web-ui.md::Approval card).
       if (a.requested_at != null) {
         const ageSec = Math.max(0, Math.floor(Date.now() / 1000 - a.requested_at));
         head.append(el('span', {
@@ -1755,7 +1755,7 @@ window.marked = marked;
       'data-confirm': 'update selected meta flake inputs + rebuild affected agents?',
     });
     // Bulk select — the full input tree gets long; ticking each box
-    // one by one is tedious (issue #275).
+    // one by one is tedious.
     const bulk = el('div', { class: 'meta-inputs-bulk' });
     const selAll = el('button', { type: 'button', class: 'meta-bulk-btn' }, 'select all');
     const selNone = el('button', { type: 'button', class: 'meta-bulk-btn' }, 'select none');