fix(list): align the unread dot with the first line, not the row midpoint

The dot is absolutely positioned with `top-1/2`, so it centres on the whole
row. In the default multi-line layout (sender / subject / preview) that puts
it a full line below the checkbox and the avatar it reads as a column with —
visibly out of line, and worse the taller the row.

Anchor it on the first line instead: top padding + half an avatar, per
density. Same fix for the messages of an expanded thread.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FTRyrFCR2N9qkpKK37GgWb

components/email/thread-email-item.tsx

@@ -137,9 +137,14 @@ export function ThreadEmailItem({
           </button>
         )}
 
-        {/* Unread indicator */}
+        {/* Unread indicator — anchored on the first line (top padding + half a
+            small avatar), not on the row's midpoint, so it stays in line with
+            the checkbox and avatar when the row wraps to a second line. */}
         {isUnread && (
-          <div className="absolute start-7 top-1/2 -translate-y-1/2">
+          <div
+            className="absolute start-7 -translate-y-1/2"
+            style={{ top: `calc(var(--density-item-py) + ${density === 'extra-compact' ? '0.625rem' : '1rem'})` }}
+          >
             <Circle className="w-1.5 h-1.5 fill-unread text-unread" />
           </div>
         )}

components/email/thread-list-item.tsx

@@ -20,6 +20,27 @@ import { ThreadEmailItem } from "./thread-email-item";
 import { EmailHoverActions } from "./email-hover-actions";
 import { useTranslations } from "next-intl";
 
+/**
+ * Unread bullet in the row gutter.
+ *
+ * It is absolutely positioned so it never widens the row, which means it has
+ * to be told where the row's *first* line sits: centring it on the row (the
+ * old `top-1/2`) drifts down as soon as the row grows a second and third line,
+ * leaving it visibly out of line with the checkbox and the avatar it reads as
+ * a column with. Anchor = top padding + half an avatar.
+ */
+function UnreadDot({ density, compactAvatar }: { density: string; compactAvatar: boolean }) {
+  const halfFirstLine = density === 'extra-compact' ? '0.625rem' : compactAvatar ? '1rem' : '1.25rem';
+  return (
+    <div
+      className="absolute start-0.5 -translate-y-1/2"
+      style={{ top: `calc(var(--density-item-py) + ${halfFirstLine})` }}
+    >
+      <Circle className="w-2 h-2 fill-unread text-unread" />
+    </div>
+  );
+}
+
 /**
  * Small chip showing the originating folder of a message, rendered in the
  * aggregate "All …" views (All Mail / unified / cross-account) where rows come
@@ -244,9 +265,7 @@ const SingleEmailItem = React.forwardRef<HTMLDivElement, SingleEmailItemProps>(
           )}
 
           {isUnread && (
-            <div className="absolute start-0.5 top-1/2 -translate-y-1/2">
-              <Circle className="w-2 h-2 fill-unread text-unread" />
-            </div>
+            <UnreadDot density={density} compactAvatar={isFocusedMailLayout} />
           )}
 
           {density !== 'extra-compact' && (
@@ -683,9 +702,7 @@ export const ThreadListItem = React.forwardRef<HTMLDivElement, ThreadListItemPro
             )}
 
             {hasUnread && (
-              <div className="absolute start-0.5 top-1/2 -translate-y-1/2">
-                <Circle className="w-2 h-2 fill-unread text-unread" />
-              </div>
+              <UnreadDot density={density} compactAvatar={isFocusedMailLayout} />
             )}
 
             {density !== 'extra-compact' && (