UI: centered nav title, settings tabs, running status, manual buttons.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/pages/Plan.tsx

@@ -90,7 +90,7 @@ export default function PlanPage() {
           disabled={!!busy}
           onClick={() => act("/api/sim/open-group", "open")}
         >
-          模拟开一组
+          手动开一组
         </button>
         <button
           className="btn ghost"
@@ -98,7 +98,7 @@ export default function PlanPage() {
           disabled={!!busy}
           onClick={() => act("/api/sim/close-group", "close")}
         >
-          模拟全平
+          手动全平
         </button>
         <button
           className="btn ghost"
@@ -115,8 +115,12 @@ export default function PlanPage() {
         <div className="kv">
           <span>策略</span>
           <span className="mono">
-            {plan?.running ? "运行中" : "已停"} · {plan?.phase || "—"} · 轮次{" "}
-            {plan?.rounds_done ?? 0}/{plan?.max_rounds ?? 3}
+            {plan?.running ? (
+              <span className="status-running">启动中</span>
+            ) : (
+              <span className="status-stopped">已停</span>
+            )}{" "}
+            · {plan?.phase || "—"} · 轮次 {plan?.rounds_done ?? 0}/{plan?.max_rounds ?? 3}
           </span>
         </div>
         <div className="kv">