style(copy): fix remaining punctuation violations and make check:copy strict

Auto-fix of 602 string literals across 74 files (half-width punctuation next to
Chinese, parenthesised Chinese, quotes); biome reflow; e2/e6 assertions follow
the new full-width summaries. check:copy now runs with --strict in ci.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/components/sites/user-data-chart.tsx

@@ -90,7 +90,7 @@ export function UserDataChart({ points }: { points: SiteUserDataPoint[] }) {
   if (rows.length < 2)
     return (
       <p className="py-6 text-center text-caption text-muted-foreground">
-        {rows.length ? "只有 1 天的数据,满 2 天后显示趋势" : "还没有历史数据。刷新登录成功后每天记一次"}
+        {rows.length ? "只有 1 天的数据，满 2 天后显示趋势" : "还没有历史数据。刷新登录成功后每天记一次"}
       </p>
     );