Unify mobile issue row layout across issues, inbox, and dashboard

Add PriorityIcon and timeAgo to IssuesList mobile rows to match the
pattern used in Inbox and Dashboard. Align Dashboard row padding to
match Inbox. All mobile issue rows now show: title (2-line clamp),
then priority + status + identifier + relative time.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/pages/Dashboard.tsx

@@ -313,7 +313,7 @@ export function Dashboard() {
                     <Link
                       key={issue.id}
                       to={`/issues/${issue.identifier ?? issue.id}`}
-                      className="px-4 py-2.5 text-sm cursor-pointer hover:bg-accent/50 transition-colors no-underline text-inherit block"
+                      className="px-4 py-3 text-sm cursor-pointer hover:bg-accent/50 transition-colors no-underline text-inherit block"
                     >
                       <div className="flex flex-col gap-1 sm:flex-row sm:items-center sm:gap-3">
                         <span className="line-clamp-2 text-sm sm:order-2 sm:flex-1 sm:min-w-0 sm:line-clamp-none sm:truncate">