fix(rank): 文档标题加 min-w-0，长标题省略而非撑破弹窗

doc-title span 是 flex 子项，truncate 需配 min-w-0 才生效（flex 子项默认
min-width:auto 不收缩）。否则超长标题横向溢出、把外链图标挤出、撑破 max-w-lg 弹窗。
列表加滚动后长列表可达，此问题更易触发。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: github-actions[bot]

app/components/rank/ContributorRow.tsx

@@ -193,7 +193,7 @@ export function ContributorRow({
                       data-umami-event-doc={doc.title}
                       data-umami-event-user={user.name}
                     >
-                      <span className="font-mono text-sm text-[#111111] dark:text-neutral-200 group-hover/link:underline decoration-2 decoration-[#CC0000] underline-offset-4 truncate pr-4">
+                      <span className="font-mono text-sm text-[#111111] dark:text-neutral-200 group-hover/link:underline decoration-2 decoration-[#CC0000] underline-offset-4 truncate pr-4 min-w-0">
                         {doc.title}
                       </span>
                       <ExternalLink className="h-4 w-4 text-[#111111]/50 dark:text-neutral-400 group-hover/link:text-[#CC0000] transition-colors shrink-0" />