fix: stabilize admin social redirect

routes/api_social.py

@@ -341,6 +341,21 @@ def admin_auth_social_callback():
     )
 
 
+@api_social_bp.route("/yuyx/api/admin-auth/social/session", methods=["GET"])
+def admin_auth_social_session():
+    admin_id = int(session.get("admin_id") or 0)
+    if not admin_id:
+        return jsonify({"authenticated": False}), 401
+    admin = database.get_admin_by_id(admin_id)
+    if not admin:
+        session.pop("admin_id", None)
+        session.pop("admin_username", None)
+        session.pop("admin_reauth_until", None)
+        session.modified = True
+        return jsonify({"authenticated": False}), 401
+    return jsonify({"authenticated": True, "username": admin.get("username") or ""})
+
+
 @api_social_bp.route("/yuyx/api/admin-auth/social/qr", methods=["GET"])
 def admin_auth_social_qr():
     value = str(request.args.get("data") or "").strip()