fix: 平均值只算本次启动后的记录 + 速度 dm/s→m/s

- 平均值按 automation 开始时间过滤，不再包含历史数据
- 速度单位从 dm/s 转为 m/s（÷10），前端/后端同步转换

edc-web/app/models.py

@@ -211,15 +211,22 @@ def get_all_test_data_for_export(serial: str = "", date_from: str = "",
         conn.close()
 
 
-def get_automation_averages(dnt_id: int) -> dict:
-    """获取自动化测试的平均值（排除失败记录 state=3）"""
+def get_automation_averages(dnt_id: int, since: str = None) -> dict:
+    """获取本次自动化测试的平均值
+
+    since: ISO 时间字符串，只统计此时间之后的测试记录
+    速度从 dm/s 转换为 m/s（÷10）
+    """
     conn = get_conn()
     try:
         with conn.cursor() as cur:
-            # 只计算最近一批自动化测试的平均值
-            # 取该设备 tb_state_tst 中与 tb_serialnet state=2 对应的记录
+            where = "dnt_id=%s"
+            params = [dnt_id]
+            if since:
+                where += " AND create_time >= %s"
+                params.append(since)
             cur.execute(
-                "SELECT AVG(ppvalue) as avg_ppvalue, "
+                f"SELECT AVG(ppvalue) as avg_ppvalue, "
                 "AVG(idle_freq) as avg_idle_freq, "
                 "AVG(enter_freq) as avg_enter_freq, "
                 "AVG(exit_freq) as avg_exit_freq, "
@@ -227,14 +234,20 @@ def get_automation_averages(dnt_id: int) -> dict:
                 "AVG(exit_dist) as avg_exit_dist, "
                 "AVG(enter_speed) as avg_enter_speed, "
                 "AVG(exit_speed) as avg_exit_speed "
-                "FROM tb_state_tst WHERE dnt_id=%s",
-                (dnt_id,),
+                f"FROM tb_state_tst WHERE {where}",
+                params,
             )
             row = cur.fetchone()
     finally:
         conn.close()
     if row:
-        return {k: round(v, 2) if v else 0 for k, v in row.items()}
+        result = {k: round(v, 2) if v else 0 for k, v in row.items()}
+        # 速度 dm/s → m/s
+        if result.get("avg_enter_speed"):
+            result["avg_enter_speed"] = round(result["avg_enter_speed"] / 10, 2)
+        if result.get("avg_exit_speed"):
+            result["avg_exit_speed"] = round(result["avg_exit_speed"] / 10, 2)
+        return result
     return {}