fix: align task pages with backend task api

src/pages/DashboardPage.tsx

@@ -25,7 +25,7 @@ export default function DashboardPage() {
 
       <div className="stats-grid">
         <div className="stat-card total">
-          <span className="stat-number">{stats.total_issues}</span>
+          <span className="stat-number">{stats.total_tasks}</span>
           <span className="stat-label">Total Tasks</span>
         </div>
         {Object.entries(stats.by_status || {}).map(([k, v]) => (
@@ -43,7 +43,7 @@ export default function DashboardPage() {
             <div className="bar-row" key={k}>
               <span className="bar-label">{k}</span>
               <div className="bar" style={{
-                width: `${Math.max((v / stats.total_issues) * 100, 5)}%`,
+                width: `${Math.max((v / stats.total_tasks) * 100, 5)}%`,
                 backgroundColor: priorityColors[k] || '#ccc',
               }}>{v}</div>
             </div>
@@ -58,13 +58,13 @@ export default function DashboardPage() {
             <tr><th>ID</th><th>Title</th><th>Status</th><th>Priority</th><th>Type</th><th>Subtype</th></tr>
           </thead>
           <tbody>
-            {(stats.recent_issues || []).map((i) => (
+            {(stats.recent_tasks || []).map((i) => (
               <tr key={i.id}>
                 <td>#{i.id}</td>
                 <td><a href={`/tasks/${i.id}`}>{i.title}</a></td>
                 <td><span className={`badge status-${i.status}`}>{i.status}</span></td>
                 <td><span className={`badge priority-${i.priority}`}>{i.priority}</span></td>
-                <td>{i.issue_type}</td><td>{i.issue_subtype || "-"}</td>
+                <td>{i.task_type}</td><td>{i.task_subtype || "-"}</td>
               </tr>
             ))}
           </tbody>