diff --git a/static/js/emailLibrary.js b/static/js/emailLibrary.js
index b7d4504da..b1883eb21 100644
--- a/static/js/emailLibrary.js
+++ b/static/js/emailLibrary.js
@@ -1330,11 +1330,20 @@ function _renderAccountsStrip() {
   strip.style.display = 'flex';
   const esc = s => String(s || '').replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/"/g, '&quot;');
   const allActive = !state._libAccountId ? ' active' : '';
-  let html = `<button class="memory-toolbar-btn gallery-chip${allActive}" data-acc-id="">All (default)</button>`;
+  // 'Default' rather than 'All (default)' — this view shows the account
+  // marked is_default; cross-account aggregation is a separate feature.
+  let html = `<button class="memory-toolbar-btn gallery-chip${allActive}" data-acc-id="">Default</button>`;
+  const _starFilled = '<svg width="11" height="11" viewBox="0 0 24 24" fill="currentColor" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polygon points="12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2"/></svg>';
+  const _starHollow = '<svg width="11" height="11" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polygon points="12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2"/></svg>';
   for (const a of state._libAccounts) {
     const active = state._libAccountId === a.id ? ' active' : '';
     const label = a.name || a.from_address || a.imap_user || 'account';
-    html += `<button class="memory-toolbar-btn gallery-chip${active}" data-acc-id="${esc(a.id)}" title="${esc(a.from_address || a.imap_user || '')}${a.is_default ? ' (default)' : ''}">${esc(label)}</button>`;
+    const star = a.is_default ? _starFilled : _starHollow;
+    const starTitle = a.is_default ? 'Default account' : 'Set as default';
+    html += `<span class="gallery-chip-wrap" style="position:relative;display:inline-flex;align-items:center;">`
+         + `<button class="memory-toolbar-btn gallery-chip${active}" data-acc-id="${esc(a.id)}" title="${esc(a.from_address || a.imap_user || '')}${a.is_default ? ' (default)' : ''}" style="padding-right:22px;">${esc(label)}</button>`
+         + `<button class="email-lib-default-star${a.is_default ? ' is-default' : ''}" data-set-default="${esc(a.id)}" title="${starTitle}" aria-label="${starTitle}" style="position:absolute;right:4px;top:50%;transform:translateY(-50%);background:none;border:0;padding:2px;cursor:pointer;color:${a.is_default ? 'var(--accent, var(--red))' : 'inherit'};opacity:${a.is_default ? '1' : '0.45'};display:inline-flex;align-items:center;">${star}</button>`
+         + `</span>`;
   }
   strip.innerHTML = html;
   strip.querySelectorAll('button[data-acc-id]').forEach(btn => {
@@ -1347,6 +1356,25 @@ function _renderAccountsStrip() {
       _loadEmails({ force: true, useCache: false });
     });
   });
+  // Star handler: POST set-default, then reload accounts + re-render so
+  // the chip stars reflect the new default.
+  strip.querySelectorAll('button[data-set-default]').forEach(btn => {
+    btn.addEventListener('click', async (e) => {
+      e.stopPropagation();
+      const acctId = btn.dataset.setDefault;
+      if (!acctId) return;
+      try {
+        await fetch(`${API_BASE}/api/email/accounts/${encodeURIComponent(acctId)}/set-default`, {
+          method: 'POST', credentials: 'same-origin',
+        });
+        // Refresh the local accounts cache and re-render the strip.
+        for (const a of state._libAccounts) a.is_default = (a.id === acctId);
+        _renderAccountsStrip();
+      } catch (err) {
+        console.error('Set default account failed:', err);
+      }
+    });
+  });
   // Idempotent — wire wheel + grab-drag scroll once per strip element.
   if (!strip._scrollWired) {
     strip._scrollWired = true;