Email reader: don't search-pivot from From/To/Cc chips + accent search icon

- Window-level recipient-chip click handler now bails if the chip
  is inside .email-reader-meta — the per-reader handler still
  toggles the expanded-address view on click.
- The from-sender (magnifying glass) search button SVG is now
  tinted with var(--accent-primary) so it stands out as a deliberate
  search action against the neutral Reply / Forward / etc icons.

static/js/emailLibrary.js

@@ -2167,6 +2167,10 @@ window.addEventListener('click', (e) => {
   // 1) Recipient chips inside the email reader area
   const chip = e.target.closest && e.target.closest('.recipient-chip');
   if (chip && chip.closest('.email-reader-header, .email-card-reader, .email-reader-tab-modal')) {
+    // Don't pivot to library search for chips in the From / To / Cc
+    // meta — clicking those should just toggle the expanded address
+    // view via the per-reader handler.
+    if (chip.closest('.email-reader-meta')) return;
     const email = (chip.dataset && chip.dataset.email) || '';
     const name = (chip.dataset && chip.dataset.name) || (chip.textContent || '').trim();
     if (!email) return;

static/style.css

@@ -28136,6 +28136,12 @@ button .spinner-whirlpool {
     min-height: 0;
   }
 }
+/* Accent-tint the email-search (from-sender) magnifying glass so
+   it reads as a deliberate search action against the other icons. */
+.email-reader-actions-inline .reader-icon-btn[data-act="from-sender"] svg {
+  color: var(--accent-primary, var(--red));
+  stroke: var(--accent-primary, var(--red));
+}
 /* Gmail-style chevron — collapsed view shows only From; the chevron
    reveals the To/Cc details inline below. */
 .email-reader-meta-toggle {