改了一点前端显示（

main/views.py

@@ -14,8 +14,8 @@ def home(request):
     user_id_qs = request.GET.get("user_id")
     uid = user_id_qs or session_user_id
     perm = request.session.get("permission")
+    u = get_user_by_id(uid) if uid is not None else None
     if perm is None and uid is not None:
-        u = get_user_by_id(uid)
         try:
             perm = int((u or {}).get("permission", 1))
         except Exception:
@@ -28,6 +28,7 @@ def home(request):
             perm = 1
     context = {
         "user_id": uid,
+        "username": (u or {}).get("username"),
         "is_admin": (int(perm) == 0),
     }
-    return render(request, "main/home.html", context)
+    return render(request, "main/home.html", context)