stale_push_wlin: 操作符号标记

- ⚠️ 预算不足1手（列了也没法买，但让你知道）
- 🛒 手数达标（现金够买，可直接操作）

取自 position_advice calc_position 的实际计算结果：
  lots=0 → 预算不足 ⚠️
  lots>0 → 可以买 🛒

data/price_history.json

@@ -1284,7 +1284,7 @@
       "date": "2026-06-24",
       "high": 68.8,
       "low": 65.92,
-      "close": 66.51
+      "close": 66.21
     }
   ],
   "300548": [
@@ -2316,7 +2316,7 @@
       "date": "2026-06-24",
       "high": 745.2,
       "low": 660.01,
-      "close": 684.99
+      "close": 682.01
     }
   ],
   "688802": [
@@ -2465,8 +2465,8 @@
     {
       "date": "2026-06-24",
       "high": 5.38,
-      "low": 5.0,
-      "close": 5.06
+      "low": 4.86,
+      "close": 4.97
     }
   ],
   "688630": [
@@ -2610,7 +2610,7 @@
       "date": "2026-06-24",
       "high": 52.43,
       "low": 49.03,
-      "close": 49.32
+      "close": 49.46
     }
   ],
   "002171": [