站点配置（百世密码/韵达账密/安能路径）从 config.yaml 移至 state.db

- state_store：加 site_settings(site,key,value) 表 + get_setting/set_setting/get_site_settings
- runtime：seed_legacy_config 启动一次性从 config.yaml 灌入（已存在不覆盖）；安能 app_path 改读 state_store
- site_baishi：导出密码改读 get_setting("百世","password")
- site_yunda：登录账密改读 get_setting("韵达",...)
- server：/config PUT 接受 settings；新增 GET /config/{site}/settings（不进 5s 轮询）

debug 仍保留在 config.yaml；站点配置现由前端配置弹窗管理（state.db 为准）。

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

site_yunda.py

@@ -73,15 +73,9 @@ def yunda_login(page):
             switch_btn.click()
             page.wait_for_timeout(500)
 
-            # 从配置读取凭证（默认空串；真实凭据仅存于被忽略的 config.yaml）
-            username = ""
-            password = ""
-            if os.path.exists(CONFIG_PATH):
-                with open(CONFIG_PATH, "r", encoding="utf-8") as f:
-                    config = yaml.safe_load(f) or {}
-                    yd_cfg = config.get("yunda", {})
-                    username = str(yd_cfg.get("username", ""))
-                    password = str(yd_cfg.get("password", ""))
+            # 凭证存 state.db（由前端站点配置）
+            username = state_store.get_setting("韵达", "username")
+            password = state_store.get_setting("韵达", "password")
 
             print(f"   -> 正在填充登录表单 (账号: {username})...")
             page.locator("#username").fill(username)