i18n: translate frontend UI strings to English

src/pages/DashboardPage.tsx

@@ -9,7 +9,7 @@ export default function DashboardPage() {
     api.get<DashboardStats>('/dashboard/stats').then(({ data }) => setStats(data))
   }, [])
 
-  if (!stats) return <div className="loading">加载中...</div>
+  if (!stats) return <div className="loading">Loading...</div>
 
   const statusColors: Record<string, string> = {
     open: '#3b82f6', in_progress: '#f59e0b', resolved: '#10b981',
@@ -21,12 +21,12 @@ export default function DashboardPage() {
 
   return (
     <div className="dashboard">
-      <h2>📊 仪表盘</h2>
+      <h2>📊 Dashboard</h2>
 
       <div className="stats-grid">
         <div className="stat-card total">
           <span className="stat-number">{stats.total_issues}</span>
-          <span className="stat-label">总 Issues</span>
+          <span className="stat-label">Total Issues</span>
         </div>
         {Object.entries(stats.by_status || {}).map(([k, v]) => (
           <div className="stat-card" key={k} style={{ borderLeftColor: statusColors[k] || '#ccc' }}>
@@ -37,7 +37,7 @@ export default function DashboardPage() {
       </div>
 
       <div className="section">
-        <h3>按优先级</h3>
+        <h3>By Priority</h3>
         <div className="bar-chart">
           {Object.entries(stats.by_priority || {}).map(([k, v]) => (
             <div className="bar-row" key={k}>
@@ -52,10 +52,10 @@ export default function DashboardPage() {
       </div>
 
       <div className="section">
-        <h3>最近 Issues</h3>
+        <h3>Recent Issues</h3>
         <table>
           <thead>
-            <tr><th>ID</th><th>标题</th><th>状态</th><th>优先级</th><th>类型</th></tr>
+            <tr><th>ID</th><th>Title</th><th>Status</th><th>Priority</th><th>Type</th></tr>
           </thead>
           <tbody>
             {(stats.recent_issues || []).map((i) => (