diff --git a/web/usercenter/components/Overview.tsx b/web/usercenter/components/Overview.tsx
index 92f2ad2..1c63a79 100644
--- a/web/usercenter/components/Overview.tsx
+++ b/web/usercenter/components/Overview.tsx
@@ -24,7 +24,7 @@ export default function Overview({
   const free = me.plan === 'free';
   const vals = me.weeklyGB;
   const max = Math.max(...vals, 0.1);
-  const labels = lang === 'zh' ? ['一', '二', '三', '四', '五', '六', '日'] : ['M', 'T', 'W', 'T', 'F', 'S', 'S'];
+  const labels = lang === 'zh' ? ['一', '二', '三', '四', '五', '六', '日'] : ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'];
 
   const stats: [string, string, string, string][] = [
     ['clock', t('quotaToday'), free ? String(me.quotaTodayMin ?? 0) : '∞', free ? 'min' : ''],
@@ -76,13 +76,13 @@ export default function Overview({
       </div>
 
       {/* usage chart + quick actions */}
-      <div style={{ display: 'grid', gridTemplateColumns: mobile ? '1fr' : '1.6fr 1fr', gap: 14, alignItems: 'start' }}>
+      <div style={{ display: 'grid', gridTemplateColumns: mobile ? '1fr' : '1.6fr 1fr', gap: 14, alignItems: 'stretch' }}>
         <div style={{ ...card, padding: '18px 22px' }}>
           <div style={{ fontSize: 13.5, fontWeight: 600, color: 'var(--fg1)', marginBottom: 16 }}>{t('usageTitle')}</div>
           <div style={{ display: 'flex', alignItems: 'flex-end', gap: 14, height: 110 }}>
             {vals.map((v, i) => (
               <div key={i} style={{ flex: 1, display: 'flex', flexDirection: 'column', alignItems: 'center', gap: 6 }}>
-                <div style={{ fontFamily: 'var(--font-mono)', fontSize: 9.5, color: 'var(--fg3)' }}>{v}</div>
+                <div style={{ fontFamily: 'var(--font-mono)', fontSize: 9.5, color: 'var(--fg3)' }}>{Number(v.toPrecision(2))}</div>
                 <div style={{ width: '100%', maxWidth: 30, height: `${(v / max) * 76}px`, background: 'var(--accent)', borderRadius: '5px 5px 0 0', opacity: 0.85 }} />
                 <div style={{ fontSize: 10.5, color: 'var(--fg3)' }}>{labels[i]}</div>
               </div>
diff --git a/web/usercenter/components/UserCenter.tsx b/web/usercenter/components/UserCenter.tsx
index 5346906..de788c9 100644
--- a/web/usercenter/components/UserCenter.tsx
+++ b/web/usercenter/components/UserCenter.tsx
@@ -180,7 +180,7 @@ export default function UserCenter() {
             <Icon name={theme === 'dark' ? 'sun' : 'moon'} size={17} color="var(--fg3)" />
           </button>
           <LangSeg lang={lang} setLang={setLang} />
-          <button onClick={signOut} style={{ display: 'inline-flex', alignItems: 'center', gap: 7, border: 'none', background: 'transparent', cursor: 'pointer', color: 'var(--fg2)', fontSize: 13, fontWeight: 600, padding: 6 }}>
+          <button onClick={signOut} style={{ display: 'inline-flex', alignItems: 'center', gap: 7, border: 'none', background: 'transparent', cursor: 'pointer', color: 'var(--fg2)', fontSize: 13, fontWeight: 600, padding: 6, whiteSpace: 'nowrap' }}>
             <Icon name="log-out" size={15} color="var(--fg3)" />
             {!mobile && t('signOut')}
           </button>