Email reader: icons wrap before chips shrink + 60px min chip width

Two-step shrink behavior:
1. As the pane narrows, the action cluster (max-width:50% of meta)
   wraps to a 2-row icon stack first
2. Then the recipient chip span starts overflow-scrolling, but
   keeps a 60px min-width (~4 chars) so the first chars of the
   sender/recipient name stay visible

static/style.css

@@ -28134,9 +28134,20 @@ button .spinner-whirlpool {
   align-items: flex-start;
   justify-content: flex-end;
   gap: 4px;
+  /* Cluster wraps to 2 rows BEFORE the chip starts shrinking — cap
+     at ~half the meta width so as the pane narrows the icons
+     re-stack into two rows first, then the chip span starts to
+     overflow-scroll once even the half-width can't hold the icons. */
+  max-width: 50%;
   /* Sit visually above the From baseline like the lifted overlay. */
   margin-top: -7px;
 }
+/* Recipient chip span keeps at least ~4 characters visible (60px)
+   before the overflow-scroll kicks in, so the sender / first
+   recipient name is always partly readable. */
+.email-reader-meta .recipient-chips {
+  min-width: 60px;
+}
 /* Very narrow undocked panes: cluster snaps back to absolute overlay
    so it doesn't push the From chip into a tiny ribbon. */
 @container docpane (max-width: 380px) {