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

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

backend/app/strategy/engine.py

@@ -40,6 +40,11 @@ class StrategyEngine:
         rest_left = 0
         if rest_until:
             rest_left = max(0, int((int(rest_until) - time.time() * 1000) / 1000))
+        last_error = row["last_error"]
+        # 清掉已修复的旧序列化错误残留
+        if last_error and "PriceResult" in str(last_error) and "__dict__" in str(last_error):
+            self._set_state(last_error=None)
+            last_error = None
         return {
             "running": bool(row["running"]),
             "phase": row["phase"],
@@ -51,7 +56,7 @@ class StrategyEngine:
             "rest_seconds": rest_sec,
             "exit_move_points": exit_pts,
             "can_open": can_open_new(open_hhmm=s.open_hhmm, stop_hhmm=s.stop_open_hhmm),
-            "last_error": row["last_error"],
+            "last_error": last_error,
             "position": upl,
             "ledger": self.ledger.snapshot(),
         }
@@ -67,16 +72,16 @@ class StrategyEngine:
         sql = f"UPDATE strategy_state SET {', '.join(cols)} WHERE id=1"
         self.db.execute(sql, tuple(vals))
 
+    async def pause(self) -> dict[str, Any]:
+        self._set_state(running=0, phase="paused", last_error=None)
+        return self.state()
+
     async def start(self) -> dict[str, Any]:
         self._set_state(running=1, last_error=None, phase="idle")
         if self._task is None or self._task.done():
             self._task = asyncio.create_task(self._loop(), name="strategy-engine")
         return self.state()
 
-    async def pause(self) -> dict[str, Any]:
-        self._set_state(running=0, phase="paused")
-        return self.state()
-
     async def emergency_close(self) -> dict[str, Any]:
         async with self._lock:
             r = self.matcher.close_group(reason="emergency")