diff --git a/src/frontend/src/App.tsx b/src/frontend/src/App.tsx
index 2a27be5..f613e82 100644
--- a/src/frontend/src/App.tsx
+++ b/src/frontend/src/App.tsx
@@ -24,6 +24,9 @@ export default function App() {
   const countdown = useStore((s) => s.countdown);
   const loadAll = useStore((s) => s.loadAll);
   const toast = useStore((s) => s.toast);
+  const projects = useStore((s) => s.projects);
+  const selectedProjectId = useStore((s) => s.selectedProjectId);
+  const setSelectedProjectId = useStore((s) => s.setSelectedProjectId);
 
   useEffect(() => {
     startPolling();
@@ -74,6 +77,23 @@ export default function App() {
             {syncOk ? '✅ 同步正常' : syncOk === false ? '❌ 服务器未启动' : '⏳ 连接中…'}
           </span>
           <span className="chip">{activeTasks.length} 个任务</span>
+          {/* v2.6: 项目切换器 */}
+          {Object.keys(projects).length > 0 && (
+            <select
+              value={selectedProjectId || ''}
+              onChange={(e) => setSelectedProjectId(e.target.value || null)}
+              style={{
+                fontSize: 11, padding: '3px 8px', borderRadius: 6,
+                border: '1px solid var(--line)', background: 'var(--panel)',
+                color: 'var(--fg)', cursor: 'pointer',
+              }}
+            >
+              <option value="">全部项目</option>
+              {Object.entries(projects).map(([pid, info]: [string, any]) => (
+                <option key={pid} value={pid}>{info.name || pid}</option>
+              ))}
+            </select>
+          )}
           <button className="btn-refresh" onClick={() => loadAll()}>
             ⟳ 刷新
           </button>