施工(HEL-226): 实现登录门户与本机免密切换账号

用设备 Cookie 和授权表记住本机已验证账号，登录页按确认样图做成门户，不再把密码写进浏览器。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

config/api.config.json

@@ -128,6 +128,20 @@
       "feature": "auction",
       "access": "authenticated"
     },
+    {
+      "method": "GET",
+      "path": "/api/auth/accounts",
+      "match": "exact",
+      "feature": "auth",
+      "access": "public"
+    },
+    {
+      "method": "POST",
+      "path": "/api/auth/forget",
+      "match": "exact",
+      "feature": "auth",
+      "access": "public"
+    },
     {
       "method": "POST",
       "path": "/api/auth/login",
@@ -156,6 +170,13 @@
       "feature": "auth",
       "access": "public"
     },
+    {
+      "method": "POST",
+      "path": "/api/auth/switch",
+      "match": "exact",
+      "feature": "auth",
+      "access": "public"
+    },
     {
       "method": "POST",
       "path": "/api/backfill",