按站点指定下载日期偏移（0=今天…30）+ 修复启动陈旧登录态

偏移量功能（前端/API 可配，服务端持久化、多用户共享）：
- state_store：新增 site_config 表 + get_offset / set_offset(0..30 钳制) / get_all_offsets
- server：新增 GET/PUT /config（百世锁定当天，不可配置）
- 顺心/中通/韵达/安能（各 expected+actual）：日期逻辑由 query_days 范围改为读 offset
  算单日 target=今天-offset，起止同日；百世仍走当日
- config.example.yaml：query_days 标记为已废弃

修复启动时显示上一会话陈旧登录态：
- state_store：新增 reset_login_states（登录态会话级，启动重置为 unknown；数据态会话无关、保留）
- runtime.launch_and_prepare：启动时对各站重置登录态，心跳就绪后重新探测写真实值

Co-Authored-By: Claude <noreply@anthropic.com>

site_yunda.py

@@ -8,6 +8,7 @@ from datetime import datetime, timedelta
 import pandas as pd
 
 from paths import DOWNLOAD_DIR, CONFIG_PATH
+import state_store
 
 
 def with_retry(site_name, label, flow, reset, max_attempts=3):
@@ -167,23 +168,14 @@ def yunda_expected_download_impl(page):
         ws_frame.locator("#startTime").wait_for(state="attached", timeout=15000)
         print("✅ 进站交接单查询页面就绪")
 
-        # 2. 从配置文件中解析并计算绝对日期跨度
-        query_days = 1
-        try:
-            if os.path.exists(CONFIG_PATH):
-                with open(CONFIG_PATH, "r", encoding="utf-8") as f:
-                    config = yaml.safe_load(f) or {}
-                    query_days = int(config.get("yunda", {}).get("query_days", 1))
-        except Exception as e:
-            print(f"   ⚠️ 读取 config.yaml 失败，默认查询 1 天: {e}")
-
+        # 2. 读取服务端日期偏移（0=今天，1=昨天…），单日范围：起止同日
+        offset = state_store.get_offset("韵达")
         today = datetime.now()
-        start_date = today - timedelta(days=(query_days - 1))
-
-        today_ymd = f"{today.year}-{today.month}-{today.day}"
-        start_date_ymd = f"{start_date.year}-{start_date.month}-{start_date.day}"
-
-        print(f">> 设置查询时间范围: [{start_date_ymd}] 至 [{today_ymd}]")
+        target = today - timedelta(days=offset)
+        target_ymd = f"{target.year}-{target.month}-{target.day}"
+        start_date_ymd = target_ymd
+        today_ymd = target_ymd
+        print(f">> 设置查询日期: [{target_ymd}]（偏移 {offset}，0=今天）")
 
         # 设定起始时间
         print("   >> 设置起始时间...")
@@ -422,19 +414,15 @@ def yunda_actual_download_impl(page):
         ).first.wait_for(state="visible", timeout=15000)
         print("✅ 扫描记录查询页面已初始化")
 
-        query_days = 1
-        try:
-            if os.path.exists(CONFIG_PATH):
-                with open(CONFIG_PATH, "r", encoding="utf-8") as f:
-                    config = yaml.safe_load(f) or {}
-                    query_days = int(config.get("yunda", {}).get("query_days", 1))
-        except Exception:
-            pass
-
+        offset = state_store.get_offset("韵达")
         today = datetime.now()
-        start_date = today - timedelta(days=(query_days - 1))
-
-        print(f">> 设置实到查询时间范围: [近 {query_days} 天]")
+        target = today - timedelta(days=offset)
+        start_date = target  # 单日范围：起止同日
+        today = target  # 让下方"截止时间"选择器也指向 target
+        print(
+            f">> 设置实到查询日期: [{target.year}-{target.month}-{target.day}]"
+            f"（偏移 {offset}，0=今天）"
+        )
 
         print("   >> 正在设定起始时间...")
         ws_frame.locator("#startDate").click()