feat: 完成多用户系统（登录/注册界面 + 用户隔离）

migrate_data.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+"""
+创建默认用户并迁移现有数据
+"""
+import os, sys
+sys.path.insert(0, '/root/.openclaw/workspace/diary-system/backend')
+os.environ['DJANGO_SETTINGS_MODULE'] = 'diary_system.settings'
+
+import django
+django.setup()
+
+from django.contrib.auth.models import User
+from diary.models import DiaryEntry, Experience, Task, Comment
+
+# 1. 创建默认用户（北极星）
+print("📝 创建默认用户...")
+default_user, created = User.objects.get_or_create(
+    username='beijixing',
+    defaults={'email': 'beijixing@example.com'}
+)
+if created:
+    default_user.set_password('beijixing123')
+    default_user.save()
+    print(f"✅ 创建默认用户：beijixing / beijixing123")
+else:
+    print(f"✅ 默认用户已存在：beijixing")
+
+# 2. 迁移现有数据到默认用户
+print("\n📦 迁移现有数据...")
+
+# 迁移日记
+diary_count = DiaryEntry.objects.filter(user__isnull=True).count()
+DiaryEntry.objects.filter(user__isnull=True).update(user=default_user)
+print(f"   日记：{diary_count} 条")
+
+# 迁移经验
+exp_count = Experience.objects.filter(user__isnull=True).count()
+Experience.objects.filter(user__isnull=True).update(user=default_user)
+print(f"   经验：{exp_count} 条")
+
+# 迁移任务
+task_count = Task.objects.filter(user__isnull=True).count()
+Task.objects.filter(user__isnull=True).update(user=default_user)
+print(f"   任务：{task_count} 条")
+
+# 迁移评论
+comment_count = Comment.objects.filter(user__isnull=True).count()
+Comment.objects.filter(user__isnull=True).update(user=default_user)
+print(f"   评论：{comment_count} 条")
+
+print("\n✅ 数据迁移完成！")
+print(f"\n📝 默认用户：beijixing")
+print(f"🔑 密码：beijixing123")