feat: 完成龙虾记忆同步系统

后端:
- Django + DRF
- PostgreSQL 数据库
- 文件扫描服务
- 差异检查服务
- 完整 REST API

前端:
- React + Ant Design
- 文件树展示
- 差异对比
- API 客户端封装

部署:
- Docker Compose
- 后端 Dockerfile
- 前端 Dockerfile
- 一键启动脚本

功能:
- 扫描龙虾记忆文件
- 检查文件差异
- 双向同步（本地 <-> 数据库）
- 版本历史
- 统计信息

backend/memory_sync/settings.py

@@ -0,0 +1,101 @@
+"""
+Django settings for memory_sync project.
+"""
+
+from pathlib import Path
+import os
+
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+SECRET_KEY = 'django-insecure-dev-key-change-in-production'
+
+DEBUG = True
+
+ALLOWED_HOSTS = ['*']
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'rest_framework',
+    'corsheaders',
+    'memory_app',
+]
+
+MIDDLEWARE = [
+    'corsheaders.middleware.CorsMiddleware',
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'memory_sync.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'memory_sync.wsgi.application'
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': os.getenv('DB_NAME', 'lobster_memory'),
+        'USER': os.getenv('DB_USER', 'postgres'),
+        'PASSWORD': os.getenv('DB_PASSWORD', 'postgres'),
+        'HOST': os.getenv('DB_HOST', 'localhost'),
+        'PORT': os.getenv('DB_PORT', '5432'),
+    }
+}
+
+AUTH_PASSWORD_VALIDATORS = []
+
+LANGUAGE_CODE = 'zh-hans'
+
+TIME_ZONE = 'Asia/Shanghai'
+
+USE_I18N = True
+
+USE_TZ = True
+
+STATIC_URL = 'static/'
+STATIC_ROOT = BASE_DIR / 'staticfiles'
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+# REST Framework
+REST_FRAMEWORK = {
+    'DEFAULT_PERMISSION_CLASSES': [
+        'rest_framework.permissions.AllowAny',
+    ],
+    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
+    'PAGE_SIZE': 100,
+}
+
+# CORS
+CORS_ALLOW_ALL_ORIGINS = True
+
+# 龙虾记忆目录
+LOBSTER_MEMORY_BASE = os.getenv('LOBSTER_MEMORY_BASE', '/home/node/.openclaw/workspace/daotong')
+
+# 支持的文件扩展名
+SUPPORTED_EXTENSIONS = ['.md', '.txt', '.json', '.py', '.js', '.yaml', '.yml']