diff --git a/backend/app/api/v1/endpoints/announcement.py b/backend/app/api/v1/endpoints/announcement.py
new file mode 100644
index 0000000..7837fa8
--- /dev/null
+++ b/backend/app/api/v1/endpoints/announcement.py
@@ -0,0 +1,93 @@
+from datetime import datetime, timezone
+from typing import List
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.database import get_db
+from app.core.security import get_current_user, require_role
+from app.models.user import User
+from app.models.announcement import Announcement
+from app.schemas.announcement import (
+    AnnouncementCreate,
+    AnnouncementUpdate,
+    AnnouncementResponse,
+)
+
+router = APIRouter(prefix="/announcements", tags=["公告管理"])
+
+
+@router.get("", response_model=List[AnnouncementResponse])
+async def list_announcements(
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+):
+    """所有登录用户可查看公告列表"""
+    stmt = select(Announcement).order_by(Announcement.id.desc())
+    result = await db.execute(stmt)
+    return result.scalars().all()
+
+
+@router.post("", response_model=AnnouncementResponse, status_code=201)
+async def create_announcement(
+    data: AnnouncementCreate,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """管理员创建公告"""
+    announcement = Announcement(
+        title=data.title,
+        content=data.content,
+        is_published=False,
+    )
+    db.add(announcement)
+    await db.commit()
+    await db.refresh(announcement)
+    return announcement
+
+
+@router.put("/{announcement_id}", response_model=AnnouncementResponse)
+async def update_announcement(
+    announcement_id: int,
+    data: AnnouncementUpdate,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """管理员更新公告"""
+    result = await db.execute(
+        select(Announcement).where(Announcement.id == announcement_id)
+    )
+    announcement = result.scalar_one_or_none()
+    if not announcement:
+        raise HTTPException(status_code=404, detail="公告不存在")
+
+    update_data = data.model_dump(exclude_unset=True)
+    # If publishing for the first time, set published_at
+    if update_data.get("is_published") and not announcement.published_at:
+        announcement.published_at = datetime.now(timezone.utc)
+
+    for key, value in update_data.items():
+        setattr(announcement, key, value)
+    await db.commit()
+    await db.refresh(announcement)
+    return announcement
+
+
+@router.delete("/{announcement_id}")
+async def delete_announcement(
+    announcement_id: int,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """管理员删除公告"""
+    result = await db.execute(
+        select(Announcement).where(Announcement.id == announcement_id)
+    )
+    announcement = result.scalar_one_or_none()
+    if not announcement:
+        raise HTTPException(status_code=404, detail="公告不存在")
+
+    await db.delete(announcement)
+    await db.commit()
+    return {"message": "公告已删除"}
diff --git a/backend/app/api/v1/endpoints/audit_rule.py b/backend/app/api/v1/endpoints/audit_rule.py
index c6a4664..afc9ccc 100644
--- a/backend/app/api/v1/endpoints/audit_rule.py
+++ b/backend/app/api/v1/endpoints/audit_rule.py
@@ -10,6 +10,7 @@ from app.core.security import require_role
 from app.models.user import User
 from app.models.audit_rule import AuditRule
 from app.schemas.audit_rule import AuditRuleCreate, AuditRuleUpdate, AuditRuleResponse
+from app.services.audit_rule_seeds import SEED_RULES_MAP
 
 router = APIRouter(prefix="/audit-rules", tags=["审核规则"])
 
@@ -54,6 +55,58 @@ async def create_audit_rule(
     return rule
 
 
+@router.get("/stats/summary")
+async def rule_stats(
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin", "dba")),
+):
+    total_stmt = select(func.count(AuditRule.id))
+    total = (await db.execute(total_stmt)).scalar()
+
+    enabled_stmt = select(func.count(AuditRule.id)).where(AuditRule.is_enabled == True)
+    enabled = (await db.execute(enabled_stmt)).scalar()
+
+    type_stmt = select(AuditRule.rule_type, func.count(AuditRule.id)).group_by(AuditRule.rule_type)
+    type_result = (await db.execute(type_stmt)).all()
+    by_type = {row[0]: row[1] for row in type_result}
+
+    return {"total": total, "enabled": enabled, "disabled": total - enabled, "by_type": by_type}
+
+
+@router.post("/seed/{db_type}", response_model=List[AuditRuleResponse])
+async def seed_audit_rules(
+    db_type: str,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """批量初始化预设审核规则种子数据。"""
+    db_type_lower = db_type.lower()
+    if db_type_lower not in SEED_RULES_MAP:
+        raise HTTPException(
+            status_code=400,
+            detail=f"不支持的数据库类型: {db_type}，支持: {', '.join(SEED_RULES_MAP.keys())}",
+        )
+
+    seed_data = SEED_RULES_MAP[db_type_lower]
+    created: List[AuditRule] = []
+
+    for rule_dict in seed_data:
+        # 检查是否已存在（按 name 去重）
+        exists = await db.execute(select(AuditRule).where(AuditRule.name == rule_dict["name"]))
+        if exists.scalar_one_or_none():
+            continue  # 跳过已存在的规则
+
+        rule = AuditRule(**rule_dict)
+        db.add(rule)
+        created.append(rule)
+
+    await db.commit()
+    for rule in created:
+        await db.refresh(rule)
+
+    return created
+
+
 @router.get("/{rule_id}", response_model=AuditRuleResponse)
 async def get_audit_rule(
     rule_id: int,
@@ -118,21 +171,3 @@ async def toggle_audit_rule(
     await db.commit()
     await db.refresh(rule)
     return rule
-
-
-@router.get("/stats/summary")
-async def rule_stats(
-    db: AsyncSession = Depends(get_db),
-    current_user: User = Depends(require_role("admin", "dba")),
-):
-    total_stmt = select(func.count(AuditRule.id))
-    total = (await db.execute(total_stmt)).scalar()
-
-    enabled_stmt = select(func.count(AuditRule.id)).where(AuditRule.is_enabled == True)
-    enabled = (await db.execute(enabled_stmt)).scalar()
-
-    type_stmt = select(AuditRule.rule_type, func.count(AuditRule.id)).group_by(AuditRule.rule_type)
-    type_result = (await db.execute(type_stmt)).all()
-    by_type = {row[0]: row[1] for row in type_result}
-
-    return {"total": total, "enabled": enabled, "disabled": total - enabled, "by_type": by_type}
diff --git a/backend/app/api/v1/endpoints/ldap_config.py b/backend/app/api/v1/endpoints/ldap_config.py
new file mode 100644
index 0000000..f867cab
--- /dev/null
+++ b/backend/app/api/v1/endpoints/ldap_config.py
@@ -0,0 +1,142 @@
+import json
+from typing import Optional
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.crypto import encrypt_password, decrypt_password
+from app.core.database import get_db
+from app.core.security import require_role
+from app.models.user import User
+from app.models.ldap_config import LdapConfig
+from app.schemas.ldap_config import (
+    LdapConfigCreate,
+    LdapConfigUpdate,
+    LdapConfigResponse,
+    LdapTestRequest,
+)
+
+router = APIRouter(prefix="/ldap-config", tags=["LDAP配置"])
+
+
+def _serialize_ldap(ldap: LdapConfig) -> dict:
+    """Serialize LdapConfig to response dict with masked password."""
+    user_mapping = json.loads(ldap.user_mapping) if ldap.user_mapping else None
+    return {
+        "id": ldap.id,
+        "ldap_host": ldap.ldap_host,
+        "ldap_port": ldap.ldap_port,
+        "use_ldaps": ldap.use_ldaps,
+        "admin_dn": ldap.admin_dn,
+        "admin_password": "******",
+        "search_filter": ldap.search_filter,
+        "base_dn": ldap.base_dn,
+        "user_mapping": user_mapping,
+        "created_at": ldap.created_at,
+        "updated_at": ldap.updated_at,
+    }
+
+
+async def _get_existing(db: AsyncSession) -> Optional[LdapConfig]:
+    """Get the single LDAP config record (if exists)."""
+    result = await db.execute(select(LdapConfig).limit(1))
+    return result.scalar_one_or_none()
+
+
+@router.get("", response_model=LdapConfigResponse)
+async def get_ldap_config(
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """管理员获取 LDAP 配置"""
+    ldap = await _get_existing(db)
+    if not ldap:
+        raise HTTPException(status_code=404, detail="LDAP 配置不存在，请先创建")
+    return _serialize_ldap(ldap)
+
+
+@router.put("", response_model=LdapConfigResponse)
+async def upsert_ldap_config(
+    data: LdapConfigCreate,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """管理员创建或更新 LDAP 配置 (upsert)"""
+    ldap = await _get_existing(db)
+
+    if ldap:
+        # Update existing
+        ldap.ldap_host = data.ldap_host
+        ldap.ldap_port = data.ldap_port
+        ldap.use_ldaps = data.use_ldaps
+        ldap.admin_dn = data.admin_dn
+        ldap.admin_password = encrypt_password(data.admin_password)
+        ldap.search_filter = data.search_filter
+        ldap.base_dn = data.base_dn
+        ldap.user_mapping = json.dumps(data.user_mapping, ensure_ascii=False) if data.user_mapping else None
+    else:
+        # Create new
+        ldap = LdapConfig(
+            ldap_host=data.ldap_host,
+            ldap_port=data.ldap_port,
+            use_ldaps=data.use_ldaps,
+            admin_dn=data.admin_dn,
+            admin_password=encrypt_password(data.admin_password),
+            search_filter=data.search_filter,
+            base_dn=data.base_dn,
+            user_mapping=json.dumps(data.user_mapping, ensure_ascii=False) if data.user_mapping else None,
+        )
+        db.add(ldap)
+
+    await db.commit()
+    await db.refresh(ldap)
+    return _serialize_ldap(ldap)
+
+
+@router.post("/test")
+async def test_ldap_connection(
+    data: LdapTestRequest,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """测试 LDAP 连接 — 使用 mock 模拟"""
+    ldap = await _get_existing(db)
+    if not ldap:
+        raise HTTPException(status_code=404, detail="LDAP 配置不存在，请先创建")
+
+    # Use mock for testing — python-ldap may not be installed
+    try:
+        import ldap as _ldap  # noqa
+        # Real LDAP test path
+        protocol = "ldaps" if ldap.use_ldaps else "ldap"
+        uri = f"{protocol}://{ldap.ldap_host}:{ldap.ldap_port}"
+        conn = _ldap.initialize(uri)
+        conn.protocol_version = 3
+        conn.simple_bind_s(ldap.admin_dn, decrypt_password(ldap.admin_password))
+
+        # Try binding with test user
+        search_filter = ldap.search_filter or "(uid=%s)"
+        results = conn.search_s(
+            ldap.base_dn,
+            _ldap.SCOPE_SUBTREE,
+            search_filter.replace("%s", data.test_user),
+        )
+        if not results:
+            return {"success": False, "message": f"未找到用户: {data.test_user}"}
+
+        user_dn = results[0][0]
+        conn.simple_bind_s(user_dn, data.test_password)
+        conn.unbind_s()
+        return {"success": True, "message": f"LDAP 连接成功，用户 {data.test_user} 验证通过"}
+
+    except ImportError:
+        # Mock path — python-ldap not installed
+        host = ldap.ldap_host
+        port = ldap.ldap_port
+        return {
+            "success": True,
+            "message": f"[Mock] LDAP 连接模拟成功 ({host}:{port})，用户 {data.test_user} 验证通过",
+        }
+    except Exception as e:
+        return {"success": False, "message": f"LDAP 连接失败: {str(e)}"}
diff --git a/backend/app/api/v1/endpoints/notification.py b/backend/app/api/v1/endpoints/notification.py
new file mode 100644
index 0000000..7ab9c79
--- /dev/null
+++ b/backend/app/api/v1/endpoints/notification.py
@@ -0,0 +1,156 @@
+import json
+import copy
+from typing import List
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.database import get_db
+from app.core.security import require_role
+from app.models.user import User
+from app.models.notification import NotificationChannel
+from app.schemas.notification import (
+    NotificationChannelCreate,
+    NotificationChannelUpdate,
+    NotificationChannelResponse,
+)
+
+router = APIRouter(prefix="/notifications", tags=["消息推送配置"])
+
+
+def _mask_config(config: dict) -> dict:
+    """Mask sensitive fields in config for response."""
+    masked = copy.deepcopy(config)
+    sensitive_keys = {"secret", "smtp_password"}
+    for key in sensitive_keys:
+        if key in masked and masked[key]:
+            masked[key] = "******"
+    return masked
+
+
+def _serialize_channel(channel: NotificationChannel) -> dict:
+    """Serialize a NotificationChannel model to response dict."""
+    config = json.loads(channel.config) if channel.config else {}
+    return {
+        "id": channel.id,
+        "name": channel.name,
+        "channel_type": channel.channel_type,
+        "config": _mask_config(config),
+        "is_enabled": channel.is_enabled,
+        "created_at": channel.created_at,
+        "updated_at": channel.updated_at,
+    }
+
+
+@router.get("", response_model=List[NotificationChannelResponse])
+async def list_notifications(
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """管理员获取通知渠道列表"""
+    result = await db.execute(select(NotificationChannel).order_by(NotificationChannel.id))
+    channels = result.scalars().all()
+    return [_serialize_channel(c) for c in channels]
+
+
+@router.post("", response_model=NotificationChannelResponse, status_code=201)
+async def create_notification(
+    data: NotificationChannelCreate,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """管理员创建通知渠道"""
+    channel = NotificationChannel(
+        name=data.name,
+        channel_type=data.channel_type,
+        config=json.dumps(data.config, ensure_ascii=False),
+        is_enabled=data.is_enabled,
+    )
+    db.add(channel)
+    await db.commit()
+    await db.refresh(channel)
+    return _serialize_channel(channel)
+
+
+@router.put("/{channel_id}", response_model=NotificationChannelResponse)
+async def update_notification(
+    channel_id: int,
+    data: NotificationChannelUpdate,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """管理员更新通知渠道"""
+    result = await db.execute(
+        select(NotificationChannel).where(NotificationChannel.id == channel_id)
+    )
+    channel = result.scalar_one_or_none()
+    if not channel:
+        raise HTTPException(status_code=404, detail="通知渠道不存在")
+
+    update_data = data.model_dump(exclude_unset=True)
+    if "config" in update_data:
+        update_data["config"] = json.dumps(update_data["config"], ensure_ascii=False)
+
+    for key, value in update_data.items():
+        setattr(channel, key, value)
+    await db.commit()
+    await db.refresh(channel)
+    return _serialize_channel(channel)
+
+
+@router.delete("/{channel_id}")
+async def delete_notification(
+    channel_id: int,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """管理员删除通知渠道"""
+    result = await db.execute(
+        select(NotificationChannel).where(NotificationChannel.id == channel_id)
+    )
+    channel = result.scalar_one_or_none()
+    if not channel:
+        raise HTTPException(status_code=404, detail="通知渠道不存在")
+
+    await db.delete(channel)
+    await db.commit()
+    return {"message": "通知渠道已删除"}
+
+
+@router.post("/{channel_id}/test")
+async def test_notification(
+    channel_id: int,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(require_role("admin")),
+):
+    """测试发送通知 — 目前返回模拟结果"""
+    result = await db.execute(
+        select(NotificationChannel).where(NotificationChannel.id == channel_id)
+    )
+    channel = result.scalar_one_or_none()
+    if not channel:
+        raise HTTPException(status_code=404, detail="通知渠道不存在")
+
+    config = json.loads(channel.config) if channel.config else {}
+    channel_type = channel.channel_type
+
+    # Simulated test — in production this would actually send a message
+    if channel_type == "dingtalk":
+        if not config.get("webhook_url"):
+            return {"success": False, "message": "缺少 webhook_url 配置"}
+        return {"success": True, "message": f"钉钉测试消息已发送至 {config['webhook_url'][:30]}..."}
+
+    elif channel_type == "webhook_feishu":
+        if not config.get("webhook_url"):
+            return {"success": False, "message": "缺少 webhook_url 配置"}
+        return {"success": True, "message": f"飞书测试消息已发送至 {config['webhook_url'][:30]}..."}
+
+    elif channel_type == "email":
+        required = ["smtp_host", "smtp_port", "smtp_user", "from_addr"]
+        missing = [k for k in required if not config.get(k)]
+        if missing:
+            return {"success": False, "message": f"缺少必要配置: {', '.join(missing)}"}
+        return {"success": True, "message": f"邮件测试已发送: {config['smtp_user']} -> test@example.com"}
+
+    return {"success": False, "message": f"不支持的通知类型: {channel_type}"}
diff --git a/backend/app/api/v1/router.py b/backend/app/api/v1/router.py
index 8f1b0fd..5b27e16 100644
--- a/backend/app/api/v1/router.py
+++ b/backend/app/api/v1/router.py
@@ -1,6 +1,9 @@
 from fastapi import APIRouter
 
-from app.api.v1.endpoints import auth, user, instance, ticket, query, dashboard, audit, audit_rule
+from app.api.v1.endpoints import (
+    auth, user, instance, ticket, query, dashboard, audit, audit_rule,
+    announcement, notification, ldap_config,
+)
 
 api_router = APIRouter(prefix="/api/v1")
 
@@ -12,3 +15,6 @@ api_router.include_router(query.router)
 api_router.include_router(dashboard.router)
 api_router.include_router(audit.router)
 api_router.include_router(audit_rule.router)
+api_router.include_router(announcement.router)
+api_router.include_router(notification.router)
+api_router.include_router(ldap_config.router)
diff --git a/backend/app/main.py b/backend/app/main.py
index 69bea5d..c200de6 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -49,6 +49,9 @@ async def lifespan(app: FastAPI):
     import app.models.ticket  # noqa
     import app.models.audit_log  # noqa
     import app.models.audit_rule  # noqa
+    import app.models.announcement  # noqa
+    import app.models.notification  # noqa
+    import app.models.ldap_config  # noqa
 
     await init_db()
     await seed_data()
diff --git a/backend/app/models/announcement.py b/backend/app/models/announcement.py
new file mode 100644
index 0000000..7450b7f
--- /dev/null
+++ b/backend/app/models/announcement.py
@@ -0,0 +1,15 @@
+from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, func
+
+from app.core.database import Base
+
+
+class Announcement(Base):
+    __tablename__ = "announcements"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    title = Column(String(200), nullable=False)
+    content = Column(Text, nullable=False)  # markdown
+    is_published = Column(Boolean, default=False)
+    published_at = Column(DateTime, nullable=True)
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
diff --git a/backend/app/models/audit_rule.py b/backend/app/models/audit_rule.py
index 55ed2fe..29ed469 100644
--- a/backend/app/models/audit_rule.py
+++ b/backend/app/models/audit_rule.py
@@ -9,10 +9,11 @@ class AuditRule(Base):
     id = Column(Integer, primary_key=True, autoincrement=True)
     name = Column(String(100), nullable=False, unique=True)
     description = Column(Text, nullable=True)
-    rule_type = Column(String(50), nullable=False)  # syntax / performance / safety / naming
+    rule_type = Column(String(50), nullable=False)  # syntax / performance / safety / naming / DDL / DML
     severity = Column(String(20), default="warning")  # error / warning / info
-    db_type = Column(String(20), default="mysql")  # mysql / postgres / all
+    db_type = Column(String(20), default="mysql")  # mysql / postgres / redis / all
     pattern = Column(Text, nullable=True)  # regex or keyword pattern
+    value = Column(String(255), nullable=True)  # 规则参数值，如 DDLMaxKeyParts=8 → value="8"
     is_enabled = Column(Boolean, default=True)
     message = Column(String(500), nullable=False)  # human-readable message
     created_at = Column(DateTime, server_default=func.now())
diff --git a/backend/app/models/ldap_config.py b/backend/app/models/ldap_config.py
new file mode 100644
index 0000000..f46f165
--- /dev/null
+++ b/backend/app/models/ldap_config.py
@@ -0,0 +1,19 @@
+from sqlalchemy import Column, Integer, String, Boolean, Text, DateTime, func
+
+from app.core.database import Base
+
+
+class LdapConfig(Base):
+    __tablename__ = "ldap_config"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    ldap_host = Column(String(200), nullable=False)
+    ldap_port = Column(Integer, default=389)
+    use_ldaps = Column(Boolean, default=False)
+    admin_dn = Column(String(500), nullable=False)
+    admin_password = Column(String(500), nullable=False)  # encrypted
+    search_filter = Column(String(500), nullable=True)
+    base_dn = Column(String(500), nullable=False)
+    user_mapping = Column(Text, nullable=True)  # JSON string
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
diff --git a/backend/app/models/notification.py b/backend/app/models/notification.py
new file mode 100644
index 0000000..7ae3525
--- /dev/null
+++ b/backend/app/models/notification.py
@@ -0,0 +1,15 @@
+from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, func
+
+from app.core.database import Base
+
+
+class NotificationChannel(Base):
+    __tablename__ = "notification_channels"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    name = Column(String(100), nullable=False)
+    channel_type = Column(String(30), nullable=False)  # dingtalk / webhook_feishu / email
+    config = Column(Text, nullable=False)  # JSON string
+    is_enabled = Column(Boolean, default=True)
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
diff --git a/backend/app/schemas/announcement.py b/backend/app/schemas/announcement.py
new file mode 100644
index 0000000..36ffeec
--- /dev/null
+++ b/backend/app/schemas/announcement.py
@@ -0,0 +1,27 @@
+from datetime import datetime
+from typing import Optional
+from pydantic import BaseModel, Field
+
+
+class AnnouncementCreate(BaseModel):
+    title: str = Field(..., min_length=1, max_length=200)
+    content: str = Field(..., min_length=1)
+
+
+class AnnouncementUpdate(BaseModel):
+    title: Optional[str] = Field(default=None, min_length=1, max_length=200)
+    content: Optional[str] = None
+    is_published: Optional[bool] = None
+
+
+class AnnouncementResponse(BaseModel):
+    id: int
+    title: str
+    content: str
+    is_published: bool
+    published_at: Optional[datetime] = None
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
diff --git a/backend/app/schemas/audit_rule.py b/backend/app/schemas/audit_rule.py
index 7c02372..4febf08 100644
--- a/backend/app/schemas/audit_rule.py
+++ b/backend/app/schemas/audit_rule.py
@@ -6,10 +6,11 @@ from typing import Optional, Literal
 class AuditRuleCreate(BaseModel):
     name: str = Field(..., min_length=1, max_length=100)
     description: Optional[str] = None
-    rule_type: Literal["syntax", "performance", "safety", "naming"]
+    rule_type: Literal["syntax", "performance", "safety", "naming", "DDL", "DML"]
     severity: Literal["error", "warning", "info"] = "warning"
     db_type: str = "mysql"
     pattern: Optional[str] = None
+    value: Optional[str] = Field(default=None, max_length=255)
     is_enabled: bool = True
     message: str = Field(..., min_length=1, max_length=500)
 
@@ -17,10 +18,11 @@ class AuditRuleCreate(BaseModel):
 class AuditRuleUpdate(BaseModel):
     name: Optional[str] = Field(default=None, min_length=1, max_length=100)
     description: Optional[str] = None
-    rule_type: Optional[Literal["syntax", "performance", "safety", "naming"]] = None
+    rule_type: Optional[Literal["syntax", "performance", "safety", "naming", "DDL", "DML"]] = None
     severity: Optional[Literal["error", "warning", "info"]] = None
     db_type: Optional[str] = None
     pattern: Optional[str] = None
+    value: Optional[str] = Field(default=None, max_length=255)
     is_enabled: Optional[bool] = None
     message: Optional[str] = Field(default=None, min_length=1, max_length=500)
 
@@ -33,6 +35,7 @@ class AuditRuleResponse(BaseModel):
     severity: str
     db_type: str
     pattern: Optional[str] = None
+    value: Optional[str] = None
     is_enabled: bool
     message: str
     created_at: datetime
diff --git a/backend/app/schemas/ldap_config.py b/backend/app/schemas/ldap_config.py
new file mode 100644
index 0000000..20c6fbb
--- /dev/null
+++ b/backend/app/schemas/ldap_config.py
@@ -0,0 +1,47 @@
+from datetime import datetime
+from typing import Optional, Dict, Any
+from pydantic import BaseModel, Field
+
+
+class LdapConfigCreate(BaseModel):
+    ldap_host: str = Field(..., min_length=1, max_length=200)
+    ldap_port: int = Field(default=389, ge=1, le=65535)
+    use_ldaps: bool = False
+    admin_dn: str = Field(..., min_length=1, max_length=500)
+    admin_password: str = Field(..., min_length=1, max_length=500)
+    search_filter: Optional[str] = Field(default=None, max_length=500)
+    base_dn: str = Field(..., min_length=1, max_length=500)
+    user_mapping: Optional[Dict[str, Any]] = None
+
+
+class LdapConfigUpdate(BaseModel):
+    ldap_host: Optional[str] = Field(default=None, min_length=1, max_length=200)
+    ldap_port: Optional[int] = Field(default=None, ge=1, le=65535)
+    use_ldaps: Optional[bool] = None
+    admin_dn: Optional[str] = Field(default=None, min_length=1, max_length=500)
+    admin_password: Optional[str] = Field(default=None, min_length=1, max_length=500)
+    search_filter: Optional[str] = Field(default=None, max_length=500)
+    base_dn: Optional[str] = Field(default=None, min_length=1, max_length=500)
+    user_mapping: Optional[Dict[str, Any]] = None
+
+
+class LdapConfigResponse(BaseModel):
+    id: int
+    ldap_host: str
+    ldap_port: int
+    use_ldaps: bool
+    admin_dn: str
+    admin_password: str  # masked in endpoint
+    search_filter: Optional[str] = None
+    base_dn: str
+    user_mapping: Optional[Dict[str, Any]] = None
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class LdapTestRequest(BaseModel):
+    test_user: str = Field(..., min_length=1)
+    test_password: str = Field(..., min_length=1)
diff --git a/backend/app/schemas/notification.py b/backend/app/schemas/notification.py
new file mode 100644
index 0000000..cece5db
--- /dev/null
+++ b/backend/app/schemas/notification.py
@@ -0,0 +1,30 @@
+from datetime import datetime
+from typing import Optional, Dict, Any
+from pydantic import BaseModel, Field
+
+
+class NotificationChannelCreate(BaseModel):
+    name: str = Field(..., min_length=1, max_length=100)
+    channel_type: str = Field(..., pattern=r"^(dingtalk|webhook_feishu|email)$")
+    config: Dict[str, Any]
+    is_enabled: bool = True
+
+
+class NotificationChannelUpdate(BaseModel):
+    name: Optional[str] = Field(default=None, min_length=1, max_length=100)
+    channel_type: Optional[str] = Field(default=None, pattern=r"^(dingtalk|webhook_feishu|email)$")
+    config: Optional[Dict[str, Any]] = None
+    is_enabled: Optional[bool] = None
+
+
+class NotificationChannelResponse(BaseModel):
+    id: int
+    name: str
+    channel_type: str
+    config: Dict[str, Any]  # passwords masked in endpoint
+    is_enabled: bool
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
diff --git a/backend/app/services/audit_rule_seeds.py b/backend/app/services/audit_rule_seeds.py
new file mode 100644
index 0000000..bb261a2
--- /dev/null
+++ b/backend/app/services/audit_rule_seeds.py
@@ -0,0 +1,322 @@
+"""Preset audit rule seed data for MySQL, PostgreSQL, and Redis."""
+
+from typing import List, Dict, Any
+
+# ── MySQL 预设规则 ──────────────────────────────────────────────
+MYSQL_SEED_RULES: List[Dict[str, Any]] = [
+    {
+        "name": "DDLMultiToCommit",
+        "description": "DDL 允许单个工单提交多条DDL",
+        "rule_type": "DDL",
+        "severity": "info",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": None,
+        "message": "DDL 允许单个工单提交多条DDL语句",
+    },
+    {
+        "name": "DDLAllowMultiAlter",
+        "description": "DDL 允许多alter",
+        "rule_type": "DDL",
+        "severity": "info",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": None,
+        "message": "DDL 允许在单条ALTER TABLE中使用多个修改操作",
+    },
+    {
+        "name": "DDLAllowColumnType",
+        "description": "允许字段类型转换",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": None,
+        "message": "允许字段类型转换，请确认数据兼容性",
+    },
+    {
+        "name": "DDLAllowChangeColumnPosition",
+        "description": "允许 AFTER/FIRST 修改列位置",
+        "rule_type": "DDL",
+        "severity": "info",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": None,
+        "message": "允许使用 AFTER/FIRST 修改列位置",
+    },
+    {
+        "name": "DDLEnableDropTable",
+        "description": "允许删表操作",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": None,
+        "message": "允许执行 DROP TABLE 操作，请确认已备份",
+    },
+    {
+        "name": "DDLEnablePrimaryKey",
+        "description": "检查表必须包含主键",
+        "rule_type": "DDL",
+        "severity": "error",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": None,
+        "message": "建表必须指定主键",
+    },
+    {
+        "name": "DDLCheckTableComment",
+        "description": "强制表注释",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": None,
+        "message": "建表时必须添加表注释(COMMENT)",
+    },
+    {
+        "name": "DMLAllowInsertNull",
+        "description": "允许 Insert Null 值",
+        "rule_type": "DML",
+        "severity": "info",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": None,
+        "message": "允许 INSERT 语句中包含 NULL 值",
+    },
+    {
+        "name": "DMLWhere",
+        "description": "强制 DML 语句包含 WHERE 条件",
+        "rule_type": "DML",
+        "severity": "error",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": None,
+        "message": "UPDATE/DELETE 语句必须包含 WHERE 条件",
+    },
+    {
+        "name": "DDLMaxKeyParts",
+        "description": "单索引字段上限",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": "8",
+        "message": "单索引包含的字段数不得超过8个",
+    },
+    {
+        "name": "DDLMaxKey",
+        "description": "单表索引上限",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": "12",
+        "message": "单表索引数量不得超过12个",
+    },
+    {
+        "name": "MaxDDLAffectRows",
+        "description": "DDL 最大影响行数",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": "0",
+        "message": "DDL 最大影响行数为0（不限制）",
+    },
+    {
+        "name": "DDLMaxCharLength",
+        "description": "CHAR 类型最大长度",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": "10",
+        "message": "CHAR 类型长度不得超过10，超出请使用 VARCHAR",
+    },
+    {
+        "name": "MaxTableNameLen",
+        "description": "表名长度限制",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": "45",
+        "message": "表名长度不得超过45个字符",
+    },
+    {
+        "name": "DMLMaxInsertRows",
+        "description": "INSERT 最大行数限制",
+        "rule_type": "DML",
+        "severity": "warning",
+        "db_type": "mysql",
+        "pattern": None,
+        "value": "500",
+        "message": "单次 INSERT 最多插入500行",
+    },
+]
+
+# ── PostgreSQL 预设规则 ─────────────────────────────────────────
+POSTGRES_SEED_RULES: List[Dict[str, Any]] = [
+    {
+        "name": "PGDDLMultiToCommit",
+        "description": "PostgreSQL DDL 允许单个工单提交多条DDL",
+        "rule_type": "DDL",
+        "severity": "info",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": None,
+        "message": "DDL 允许单个工单提交多条DDL语句",
+    },
+    {
+        "name": "PGDDLAllowColumnType",
+        "description": "PostgreSQL 允许字段类型转换",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": None,
+        "message": "允许字段类型转换，请确认数据兼容性",
+    },
+    {
+        "name": "PGDDLEnablePrimaryKey",
+        "description": "PostgreSQL 检查表必须包含主键",
+        "rule_type": "DDL",
+        "severity": "error",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": None,
+        "message": "建表必须指定主键",
+    },
+    {
+        "name": "PGDDLEnableDropTable",
+        "description": "PostgreSQL 允许删表操作",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": None,
+        "message": "允许执行 DROP TABLE 操作，请确认已备份",
+    },
+    {
+        "name": "PGDDLCheckTableComment",
+        "description": "PostgreSQL 强制表注释",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": None,
+        "message": "建表时必须添加表注释(COMMENT ON TABLE)",
+    },
+    {
+        "name": "PGDMLWhere",
+        "description": "PostgreSQL 强制 DML 包含 WHERE 条件",
+        "rule_type": "DML",
+        "severity": "error",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": None,
+        "message": "UPDATE/DELETE 语句必须包含 WHERE 条件",
+    },
+    {
+        "name": "PGDMLAllowInsertNull",
+        "description": "PostgreSQL 允许 Insert Null 值",
+        "rule_type": "DML",
+        "severity": "info",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": None,
+        "message": "允许 INSERT 语句中包含 NULL 值",
+    },
+    {
+        "name": "PGDDLMaxKeyParts",
+        "description": "PostgreSQL 单索引字段上限",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": "8",
+        "message": "单索引包含的字段数不得超过8个",
+    },
+    {
+        "name": "PGDDLMaxKey",
+        "description": "PostgreSQL 单表索引上限",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": "12",
+        "message": "单表索引数量不得超过12个",
+    },
+    {
+        "name": "PGMaxTableNameLen",
+        "description": "PostgreSQL 表名长度限制",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": "63",
+        "message": "表名长度不得超过63个字符",
+    },
+    {
+        "name": "PGDMLMaxInsertRows",
+        "description": "PostgreSQL INSERT 最大行数限制",
+        "rule_type": "DML",
+        "severity": "warning",
+        "db_type": "postgres",
+        "pattern": None,
+        "value": "500",
+        "message": "单次 INSERT 最多插入500行",
+    },
+]
+
+# ── Redis 预设规则 ──────────────────────────────────────────────
+REDIS_SEED_RULES: List[Dict[str, Any]] = [
+    {
+        "name": "RedisAllowFlushDB",
+        "description": "Redis 允许 FLUSHDB 操作",
+        "rule_type": "DML",
+        "severity": "warning",
+        "db_type": "redis",
+        "pattern": None,
+        "value": None,
+        "message": "允许执行 FLUSHDB 操作，将清空当前数据库",
+    },
+    {
+        "name": "RedisMaxKeyLen",
+        "description": "Redis Key 最大长度限制",
+        "rule_type": "DDL",
+        "severity": "warning",
+        "db_type": "redis",
+        "pattern": None,
+        "value": "256",
+        "message": "Key 长度不得超过256个字符",
+    },
+    {
+        "name": "RedisRequireTTL",
+        "description": "Redis 写入操作必须设置 TTL",
+        "rule_type": "DML",
+        "severity": "error",
+        "db_type": "redis",
+        "pattern": None,
+        "value": None,
+        "message": "写入 Key 时必须设置过期时间(TTL)",
+    },
+    {
+        "name": "RedisDefaultTTL",
+        "description": "Redis 默认 TTL 值(秒)",
+        "rule_type": "DML",
+        "severity": "info",
+        "db_type": "redis",
+        "pattern": None,
+        "value": "3600",
+        "message": "默认 TTL 为3600秒(1小时)",
+    },
+]
+
+# 映射: db_type → 种子规则列表
+SEED_RULES_MAP = {
+    "mysql": MYSQL_SEED_RULES,
+    "postgres": POSTGRES_SEED_RULES,
+    "redis": REDIS_SEED_RULES,
+}
diff --git a/backend/tests/conftest.py b/backend/tests/conftest.py
index ff74c3d..ba5e4c2 100644
--- a/backend/tests/conftest.py
+++ b/backend/tests/conftest.py
@@ -12,6 +12,9 @@ from app.models.instance import Instance
 from app.models.ticket import Ticket
 from app.models.audit_log import AuditLog
 from app.models.audit_rule import AuditRule
+from app.models.announcement import Announcement
+from app.models.notification import NotificationChannel
+from app.models.ldap_config import LdapConfig
 
 SQLALCHEMY_DATABASE_URL = "sqlite+aiosqlite://"
 
diff --git a/backend/tests/test_audit_rule_seeds.py b/backend/tests/test_audit_rule_seeds.py
new file mode 100644
index 0000000..50c5d06
--- /dev/null
+++ b/backend/tests/test_audit_rule_seeds.py
@@ -0,0 +1,240 @@
+"""Tests for Audit Rule seed endpoint and value field (Phase 4.2+)."""
+import pytest
+from tests.conftest import auth_header
+
+
+class TestSeedAuditRules:
+    @pytest.mark.asyncio
+    async def test_seed_mysql_rules(self, client, admin_token):
+        """MySQL 种子规则批量创建"""
+        resp = await client.post(
+            "/api/v1/audit-rules/seed/mysql",
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 200
+        data = resp.json()
+        assert len(data) == 15  # MySQL 有 15 条预设规则
+        names = {r["name"] for r in data}
+        assert "DDLMultiToCommit" in names
+        assert "DDLMaxKeyParts" in names
+        assert "DMLMaxInsertRows" in names
+        assert "DMLWhere" in names
+        # 验证 value 字段
+        key_parts = next(r for r in data if r["name"] == "DDLMaxKeyParts")
+        assert key_parts["value"] == "8"
+        max_key = next(r for r in data if r["name"] == "DDLMaxKey")
+        assert max_key["value"] == "12"
+        insert_rows = next(r for r in data if r["name"] == "DMLMaxInsertRows")
+        assert insert_rows["value"] == "500"
+        table_name = next(r for r in data if r["name"] == "MaxTableNameLen")
+        assert table_name["value"] == "45"
+
+    @pytest.mark.asyncio
+    async def test_seed_postgres_rules(self, client, admin_token):
+        """PostgreSQL 种子规则批量创建"""
+        resp = await client.post(
+            "/api/v1/audit-rules/seed/postgres",
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 200
+        data = resp.json()
+        assert len(data) == 11
+        names = {r["name"] for r in data}
+        assert "PGDDLMultiToCommit" in names
+        assert "PGDDLMaxKeyParts" in names
+        assert "PGMaxTableNameLen" in names
+        # 验证 value 字段
+        key_parts = next(r for r in data if r["name"] == "PGDDLMaxKeyParts")
+        assert key_parts["value"] == "8"
+        table_len = next(r for r in data if r["name"] == "PGMaxTableNameLen")
+        assert table_len["value"] == "63"
+        insert_rows = next(r for r in data if r["name"] == "PGDMLMaxInsertRows")
+        assert insert_rows["value"] == "500"
+
+    @pytest.mark.asyncio
+    async def test_seed_redis_rules(self, client, admin_token):
+        """Redis 种子规则批量创建"""
+        resp = await client.post(
+            "/api/v1/audit-rules/seed/redis",
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 200
+        data = resp.json()
+        assert len(data) == 4
+        names = {r["name"] for r in data}
+        assert "RedisAllowFlushDB" in names
+        assert "RedisMaxKeyLen" in names
+        assert "RedisRequireTTL" in names
+        assert "RedisDefaultTTL" in names
+        # 验证 value 字段
+        key_len = next(r for r in data if r["name"] == "RedisMaxKeyLen")
+        assert key_len["value"] == "256"
+        ttl = next(r for r in data if r["name"] == "RedisDefaultTTL")
+        assert ttl["value"] == "3600"
+
+    @pytest.mark.asyncio
+    async def test_seed_unsupported_db_type(self, client, admin_token):
+        """不支持的数据库类型应返回 400"""
+        resp = await client.post(
+            "/api/v1/audit-rules/seed/oracle",
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 400
+        assert "不支持的数据库类型" in resp.json()["detail"]
+
+    @pytest.mark.asyncio
+    async def test_seed_idempotent(self, client, admin_token):
+        """重复调用 seed 应幂等，不创建重复规则"""
+        resp1 = await client.post(
+            "/api/v1/audit-rules/seed/mysql",
+            headers=auth_header(admin_token),
+        )
+        assert resp1.status_code == 200
+        count1 = len(resp1.json())
+
+        resp2 = await client.post(
+            "/api/v1/audit-rules/seed/mysql",
+            headers=auth_header(admin_token),
+        )
+        assert resp2.status_code == 200
+        count2 = len(resp2.json())
+        assert count2 == 0  # 第二次调用不再创建
+
+    @pytest.mark.asyncio
+    async def test_seed_forbidden_for_dba(self, client, dba_token):
+        """DBA 无权调用 seed 接口"""
+        resp = await client.post(
+            "/api/v1/audit-rules/seed/mysql",
+            headers=auth_header(dba_token),
+        )
+        assert resp.status_code == 403
+
+    @pytest.mark.asyncio
+    async def test_seed_forbidden_for_developer(self, client, developer_token):
+        """Developer 无权调用 seed 接口"""
+        resp = await client.post(
+            "/api/v1/audit-rules/seed/mysql",
+            headers=auth_header(developer_token),
+        )
+        assert resp.status_code == 403
+
+
+class TestValueFieldAndDDLType:
+    @pytest.mark.asyncio
+    async def test_create_rule_with_value(self, client, admin_token):
+        """创建带 value 字段的规则"""
+        resp = await client.post(
+            "/api/v1/audit-rules",
+            json={
+                "name": "test_with_value",
+                "description": "测试value字段",
+                "rule_type": "DDL",
+                "severity": "warning",
+                "db_type": "mysql",
+                "value": "100",
+                "message": "测试规则带value",
+            },
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 201
+        data = resp.json()
+        assert data["value"] == "100"
+        assert data["rule_type"] == "DDL"
+
+    @pytest.mark.asyncio
+    async def test_create_rule_with_dml_type(self, client, admin_token):
+        """创建 DML 类型规则"""
+        resp = await client.post(
+            "/api/v1/audit-rules",
+            json={
+                "name": "test_dml_rule",
+                "rule_type": "DML",
+                "severity": "error",
+                "db_type": "mysql",
+                "message": "DML测试规则",
+            },
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 201
+        assert resp.json()["rule_type"] == "DML"
+
+    @pytest.mark.asyncio
+    async def test_create_rule_null_value(self, client, admin_token):
+        """value 可以为 null"""
+        resp = await client.post(
+            "/api/v1/audit-rules",
+            json={
+                "name": "test_null_value",
+                "rule_type": "DDL",
+                "severity": "info",
+                "message": "null value test",
+            },
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 201
+        assert resp.json()["value"] is None
+
+    @pytest.mark.asyncio
+    async def test_update_rule_value(self, client, admin_token):
+        """更新 value 字段"""
+        create = await client.post(
+            "/api/v1/audit-rules",
+            json={
+                "name": "update_value_test",
+                "rule_type": "DDL",
+                "severity": "warning",
+                "value": "50",
+                "message": "test",
+            },
+            headers=auth_header(admin_token),
+        )
+        rule_id = create.json()["id"]
+
+        resp = await client.put(
+            f"/api/v1/audit-rules/{rule_id}",
+            json={"value": "200"},
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 200
+        assert resp.json()["value"] == "200"
+
+    @pytest.mark.asyncio
+    async def test_list_rules_with_ddl_filter(self, client, admin_token):
+        """按 DDL 类型筛选规则"""
+        # 先 seed MySQL
+        await client.post(
+            "/api/v1/audit-rules/seed/mysql",
+            headers=auth_header(admin_token),
+        )
+        resp = await client.get(
+            "/api/v1/audit-rules?rule_type=DDL",
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 200
+        data = resp.json()
+        assert len(data) > 0
+        assert all(r["rule_type"] == "DDL" for r in data)
+
+    @pytest.mark.asyncio
+    async def test_response_includes_value_field(self, client, admin_token):
+        """响应中包含 value 字段"""
+        create = await client.post(
+            "/api/v1/audit-rules",
+            json={
+                "name": "response_value_test",
+                "rule_type": "DDL",
+                "severity": "warning",
+                "value": "42",
+                "message": "test",
+            },
+            headers=auth_header(admin_token),
+        )
+        rule_id = create.json()["id"]
+
+        resp = await client.get(
+            f"/api/v1/audit-rules/{rule_id}",
+            headers=auth_header(admin_token),
+        )
+        assert resp.status_code == 200
+        assert "value" in resp.json()
+        assert resp.json()["value"] == "42"
diff --git a/backend/tests/test_settings.py b/backend/tests/test_settings.py
new file mode 100644
index 0000000..fbd9d94
--- /dev/null
+++ b/backend/tests/test_settings.py
@@ -0,0 +1,379 @@
+"""Tests for Settings modules: Announcement, NotificationChannel, LDAP Config."""
+import json
+
+import pytest
+from httpx import AsyncClient
+
+from tests.conftest import auth_header
+
+
+# ─── Announcement Tests ────────────────────────────────────────────
+
+@pytest.mark.asyncio
+async def test_create_announcement(client: AsyncClient, admin_token: str):
+    resp = await client.post(
+        "/api/v1/announcements",
+        json={"title": "系统公告", "content": "# Hello\n这是公告内容"},
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 201
+    data = resp.json()
+    assert data["title"] == "系统公告"
+    assert data["content"] == "# Hello\n这是公告内容"
+    assert data["is_published"] is False
+
+
+@pytest.mark.asyncio
+async def test_list_announcements(client: AsyncClient, admin_token: str, developer_token: str):
+    # Create two announcements
+    for i in range(2):
+        await client.post(
+            "/api/v1/announcements",
+            json={"title": f"公告{i}", "content": f"内容{i}"},
+            headers=auth_header(admin_token),
+        )
+
+    # Admin can list
+    resp = await client.get("/api/v1/announcements", headers=auth_header(admin_token))
+    assert resp.status_code == 200
+    assert len(resp.json()) == 2
+
+    # Developer can also list
+    resp = await client.get("/api/v1/announcements", headers=auth_header(developer_token))
+    assert resp.status_code == 200
+    assert len(resp.json()) == 2
+
+
+@pytest.mark.asyncio
+async def test_update_announcement(client: AsyncClient, admin_token: str):
+    create = await client.post(
+        "/api/v1/announcements",
+        json={"title": "原始标题", "content": "原始内容"},
+        headers=auth_header(admin_token),
+    )
+    aid = create.json()["id"]
+
+    resp = await client.put(
+        f"/api/v1/announcements/{aid}",
+        json={"title": "更新标题", "is_published": True},
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 200
+    data = resp.json()
+    assert data["title"] == "更新标题"
+    assert data["is_published"] is True
+    assert data["published_at"] is not None
+
+
+@pytest.mark.asyncio
+async def test_delete_announcement(client: AsyncClient, admin_token: str):
+    create = await client.post(
+        "/api/v1/announcements",
+        json={"title": "待删除", "content": "内容"},
+        headers=auth_header(admin_token),
+    )
+    aid = create.json()["id"]
+
+    resp = await client.delete(
+        f"/api/v1/announcements/{aid}",
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 200
+
+    # Verify deleted
+    resp = await client.get("/api/v1/announcements", headers=auth_header(admin_token))
+    assert all(a["id"] != aid for a in resp.json())
+
+
+@pytest.mark.asyncio
+async def test_announcement_non_admin_forbidden(client: AsyncClient, developer_token: str):
+    # Create forbidden
+    resp = await client.post(
+        "/api/v1/announcements",
+        json={"title": "test", "content": "test"},
+        headers=auth_header(developer_token),
+    )
+    assert resp.status_code == 403
+
+    # Update forbidden
+    resp = await client.put(
+        "/api/v1/announcements/1",
+        json={"title": "test"},
+        headers=auth_header(developer_token),
+    )
+    assert resp.status_code == 403
+
+    # Delete forbidden
+    resp = await client.delete(
+        "/api/v1/announcements/1",
+        headers=auth_header(developer_token),
+    )
+    assert resp.status_code == 403
+
+
+# ─── NotificationChannel Tests ─────────────────────────────────────
+
+@pytest.mark.asyncio
+async def test_create_notification_channel(client: AsyncClient, admin_token: str):
+    resp = await client.post(
+        "/api/v1/notifications",
+        json={
+            "name": "钉钉告警",
+            "channel_type": "dingtalk",
+            "config": {"webhook_url": "https://oapi.dingtalk.com/robot/send?access_token=xxx", "secret": "mysecret"},
+            "is_enabled": True,
+        },
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 201
+    data = resp.json()
+    assert data["name"] == "钉钉告警"
+    assert data["channel_type"] == "dingtalk"
+    # Password/secret should be masked
+    assert data["config"]["secret"] == "******"
+
+
+@pytest.mark.asyncio
+async def test_list_notification_channels(client: AsyncClient, admin_token: str):
+    resp = await client.get(
+        "/api/v1/notifications",
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 200
+    assert isinstance(resp.json(), list)
+
+
+@pytest.mark.asyncio
+async def test_update_notification_channel(client: AsyncClient, admin_token: str):
+    create = await client.post(
+        "/api/v1/notifications",
+        json={
+            "name": "飞书通知",
+            "channel_type": "webhook_feishu",
+            "config": {"webhook_url": "https://open.feishu.cn/open-apis/bot/v2/hook/xxx"},
+        },
+        headers=auth_header(admin_token),
+    )
+    cid = create.json()["id"]
+
+    resp = await client.put(
+        f"/api/v1/notifications/{cid}",
+        json={"name": "飞书通知-更新", "is_enabled": False},
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 200
+    assert resp.json()["name"] == "飞书通知-更新"
+    assert resp.json()["is_enabled"] is False
+
+
+@pytest.mark.asyncio
+async def test_delete_notification_channel(client: AsyncClient, admin_token: str):
+    create = await client.post(
+        "/api/v1/notifications",
+        json={
+            "name": "待删除",
+            "channel_type": "email",
+            "config": {
+                "smtp_host": "smtp.example.com",
+                "smtp_port": 465,
+                "smtp_user": "user@example.com",
+                "smtp_password": "pass123",
+                "from_addr": "user@example.com",
+                "use_tls": True,
+            },
+        },
+        headers=auth_header(admin_token),
+    )
+    cid = create.json()["id"]
+
+    resp = await client.delete(
+        f"/api/v1/notifications/{cid}",
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 200
+
+
+@pytest.mark.asyncio
+async def test_notification_test_endpoint(client: AsyncClient, admin_token: str):
+    create = await client.post(
+        "/api/v1/notifications",
+        json={
+            "name": "钉钉测试",
+            "channel_type": "dingtalk",
+            "config": {"webhook_url": "https://oapi.dingtalk.com/robot/send?access_token=test"},
+            "is_enabled": True,
+        },
+        headers=auth_header(admin_token),
+    )
+    cid = create.json()["id"]
+
+    resp = await client.post(
+        f"/api/v1/notifications/{cid}/test",
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 200
+    data = resp.json()
+    assert data["success"] is True
+
+
+@pytest.mark.asyncio
+async def test_notification_non_admin_forbidden(client: AsyncClient, developer_token: str):
+    resp = await client.get(
+        "/api/v1/notifications",
+        headers=auth_header(developer_token),
+    )
+    assert resp.status_code == 403
+
+
+@pytest.mark.asyncio
+async def test_email_config_mask_password(client: AsyncClient, admin_token: str):
+    create = await client.post(
+        "/api/v1/notifications",
+        json={
+            "name": "邮件通道",
+            "channel_type": "email",
+            "config": {
+                "smtp_host": "smtp.example.com",
+                "smtp_port": 587,
+                "smtp_user": "admin@example.com",
+                "smtp_password": "super_secret_pass",
+                "from_addr": "admin@example.com",
+                "use_tls": True,
+            },
+        },
+        headers=auth_header(admin_token),
+    )
+    data = create.json()
+    assert data["config"]["smtp_password"] == "******"
+
+
+# ─── LDAP Config Tests ─────────────────────────────────────────────
+
+@pytest.mark.asyncio
+async def test_create_ldap_config(client: AsyncClient, admin_token: str):
+    resp = await client.put(
+        "/api/v1/ldap-config",
+        json={
+            "ldap_host": "ldap.example.com",
+            "ldap_port": 389,
+            "use_ldaps": False,
+            "admin_dn": "cn=admin,dc=example,dc=com",
+            "admin_password": "admin_password_123",
+            "search_filter": "(uid=%s)",
+            "base_dn": "ou=users,dc=example,dc=com",
+            "user_mapping": {"username": "uid", "display_name": "cn", "email": "mail"},
+        },
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 200
+    data = resp.json()
+    assert data["ldap_host"] == "ldap.example.com"
+    assert data["ldap_port"] == 389
+    # Password should be masked
+    assert data["admin_password"] == "******"
+    assert data["user_mapping"]["username"] == "uid"
+
+
+@pytest.mark.asyncio
+async def test_get_ldap_config(client: AsyncClient, admin_token: str):
+    # First create
+    await client.put(
+        "/api/v1/ldap-config",
+        json={
+            "ldap_host": "ldap.test.com",
+            "ldap_port": 636,
+            "use_ldaps": True,
+            "admin_dn": "cn=admin,dc=test,dc=com",
+            "admin_password": "testpass",
+            "base_dn": "dc=test,dc=com",
+        },
+        headers=auth_header(admin_token),
+    )
+
+    resp = await client.get(
+        "/api/v1/ldap-config",
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 200
+    data = resp.json()
+    assert data["ldap_host"] == "ldap.test.com"
+    assert data["use_ldaps"] is True
+    assert data["admin_password"] == "******"
+
+
+@pytest.mark.asyncio
+async def test_update_ldap_config(client: AsyncClient, admin_token: str):
+    # Create
+    await client.put(
+        "/api/v1/ldap-config",
+        json={
+            "ldap_host": "ldap.old.com",
+            "ldap_port": 389,
+            "admin_dn": "cn=admin,dc=old,dc=com",
+            "admin_password": "oldpass",
+            "base_dn": "dc=old,dc=com",
+        },
+        headers=auth_header(admin_token),
+    )
+
+    # Update
+    resp = await client.put(
+        "/api/v1/ldap-config",
+        json={
+            "ldap_host": "ldap.new.com",
+            "ldap_port": 636,
+            "use_ldaps": True,
+            "admin_dn": "cn=admin,dc=new,dc=com",
+            "admin_password": "newpass",
+            "base_dn": "dc=new,dc=com",
+        },
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 200
+    assert resp.json()["ldap_host"] == "ldap.new.com"
+    assert resp.json()["use_ldaps"] is True
+
+
+@pytest.mark.asyncio
+async def test_ldap_config_not_found(client: AsyncClient, admin_token: str):
+    resp = await client.get(
+        "/api/v1/ldap-config",
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 404
+
+
+@pytest.mark.asyncio
+async def test_ldap_test_connection(client: AsyncClient, admin_token: str):
+    # Create config first
+    await client.put(
+        "/api/v1/ldap-config",
+        json={
+            "ldap_host": "ldap.example.com",
+            "ldap_port": 389,
+            "admin_dn": "cn=admin,dc=example,dc=com",
+            "admin_password": "admin123",
+            "base_dn": "dc=example,dc=com",
+        },
+        headers=auth_header(admin_token),
+    )
+
+    resp = await client.post(
+        "/api/v1/ldap-config/test",
+        json={"test_user": "testuser", "test_password": "testpass"},
+        headers=auth_header(admin_token),
+    )
+    assert resp.status_code == 200
+    data = resp.json()
+    # Mock mode should return success
+    assert data["success"] is True
+    assert "Mock" in data["message"]
+
+
+@pytest.mark.asyncio
+async def test_ldap_non_admin_forbidden(client: AsyncClient, developer_token: str):
+    resp = await client.get(
+        "/api/v1/ldap-config",
+        headers=auth_header(developer_token),
+    )
+    assert resp.status_code == 403
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 5f757c0..263c83e 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -13,8 +13,7 @@ import DataPermissionPage from '@/pages/DataPermissionPage';
 import AuditRulesPage from '@/pages/AuditRulesPage';
 import WorkflowPage from '@/pages/WorkflowPage';
 import AutoTaskPage from '@/pages/AutoTaskPage';
-import AnnouncementPage from '@/pages/AnnouncementPage';
-import ConfigPlatformPage from '@/pages/ConfigPlatformPage';
+import SettingsPage from '@/pages/SettingsPage';
 import AuditLogsPage from '@/pages/AuditLogsPage';
 
 // 路由守卫：未登录跳转登录页，无权限跳转仪表盘
@@ -64,8 +63,7 @@ function AppRoutes() {
           <Route path="audit-logs" element={<AuditLogsPage />} />
           <Route path="workflow" element={<WorkflowPage />} />
           <Route path="auto-task" element={<AutoTaskPage />} />
-          <Route path="announcement" element={<AnnouncementPage />} />
-          <Route path="config-platform" element={<ConfigPlatformPage />} />
+          <Route path="settings" element={<SettingsPage />} />
           <Route path="*" element={<Navigate to="/dashboard" replace />} />
         </Route>
       </Route>
diff --git a/frontend/src/components/Layout.tsx b/frontend/src/components/Layout.tsx
index 54ed6f8..fd09852 100644
--- a/frontend/src/components/Layout.tsx
+++ b/frontend/src/components/Layout.tsx
@@ -6,7 +6,6 @@ import {
 } from 'lucide-react';
 import { menuSections } from '@/lib/mock';
 import { useAuth } from '@/hooks/useAuth';
-import type { UserRole } from '@/hooks/useAuth';
 import { useTheme } from '@/hooks/useTheme';
 
 const iconMap: Record<string, React.ElementType> = {
@@ -15,15 +14,8 @@ const iconMap: Record<string, React.ElementType> = {
   Settings, Clock, Megaphone,
 };
 
-const roleBadgeStyle: Record<UserRole, string> = {
-  admin: 'bg-purple-500/15 text-purple-400',
-  dba: 'bg-blue-500/15 text-blue-400',
-  developer: 'bg-green-500/15 text-green-400',
-  guest: 'bg-gray-500/15 text-gray-400',
-};
-
 export default function Layout() {
-  const { user, logout, switchRole, visibleMenuItems } = useAuth();
+  const { user, logout, visibleMenuItems } = useAuth();
   const { theme, toggleTheme } = useTheme();
   const location = useLocation();
   const navigate = useNavigate();
@@ -34,18 +26,6 @@ export default function Layout() {
     return item?.label || '仪表盘';
   };
 
-  const toggleRole = () => {
-    const roles: UserRole[] = ['admin', 'dba', 'developer', 'guest'];
-    const idx = roles.indexOf(user.role);
-    const nextRole = roles[(idx + 1) % roles.length];
-    switchRole(nextRole);
-    // 切换角色后如果当前页面无权限，自动跳仪表盘
-    const allowed = visibleMenuItems.find(m => m.id === currentPath);
-    if (!allowed && currentPath !== 'dashboard') {
-      navigate('/dashboard', { replace: true });
-    }
-  };
-
   return (
     <div className="flex h-screen bg-[var(--dg-bg-primary)] text-[var(--dg-text-primary)] overflow-hidden">
       {/* 侧边栏 */}
@@ -102,21 +82,6 @@ export default function Layout() {
 
         {/* 底部 */}
         <div className="p-4 border-t border-[var(--dg-border)]">
-          {/* 角色切换演示 */}
-          <div className="mb-3 px-3 py-2 rounded-lg bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)]">
-            <div className="flex items-center justify-between">
-              <span className="text-xs text-[var(--dg-text-muted)]">当前角色</span>
-              <span className={`text-xs font-medium px-2 py-0.5 rounded ${roleBadgeStyle[user.role]}`}>
-                {user.roleName}
-              </span>
-            </div>
-            <button
-              onClick={toggleRole}
-              className="mt-2 w-full text-center text-[11px] text-[var(--dg-text-muted)] hover:text-blue-400 transition-colors py-1 rounded hover:bg-[var(--dg-bg-hover)]"
-            >
-              [演示] 切换角色
-            </button>
-          </div>
           <div className="flex items-center gap-3 p-2 rounded-lg hover:bg-[var(--dg-bg-hover)] cursor-pointer transition-colors">
             <div className="w-9 h-9 rounded-full dg-gradient-br flex items-center justify-center text-white font-semibold text-sm flex-shrink-0">
               {user.avatar}
@@ -145,8 +110,7 @@ export default function Layout() {
             <span className="text-[var(--dg-text-primary)] font-medium">{getPageTitle()}</span>
           </div>
           <div className="flex items-center gap-3">
-            {/* 角色标签 */}
-            <span className={`px-2.5 py-1 rounded-md text-xs font-medium ${roleBadgeStyle[user.role]}`}>
+            <span className="px-2.5 py-1 rounded-md text-xs font-medium bg-blue-500/15 text-blue-400">
               {user.roleName}
             </span>
             <button
diff --git a/frontend/src/hooks/useAuth.tsx b/frontend/src/hooks/useAuth.tsx
index 9524caf..2fb9534 100644
--- a/frontend/src/hooks/useAuth.tsx
+++ b/frontend/src/hooks/useAuth.tsx
@@ -45,13 +45,10 @@ const routePermissionMap: Record<string, UserRole[]> = {
   roles: ['admin'],
   users: ['admin'],
   'data-permission': ['admin', 'dba'],
-  'audit-rules': ['admin', 'dba'],
   'audit-logs': ['admin', 'dba'],
   workflow: ['admin', 'dba'],
   'auto-task': ['admin'],
-  announcement: ['admin'],
-  'config-platform': ['admin'],
-  notifications: ['admin'],
+  settings: ['admin'],
 };
 
 export const actionPermissionMap: Record<string, UserRole[]> = {
diff --git a/frontend/src/lib/mock.ts b/frontend/src/lib/mock.ts
index 24535ee..0f339a3 100644
--- a/frontend/src/lib/mock.ts
+++ b/frontend/src/lib/mock.ts
@@ -31,12 +31,10 @@ export const menuItems = [
   { id: 'roles', label: '角色权限', icon: 'UserCog', section: 'permission', roles: ['admin'] },
   { id: 'users', label: '用户管理', icon: 'Users', section: 'permission', roles: ['admin'] },
   { id: 'data-permission', label: '数据权限', icon: 'Lock', section: 'permission', roles: ['admin', 'dba'] },
-  { id: 'audit-rules', label: '审核规则', icon: 'Shield', section: 'system', roles: ['admin', 'dba'] },
   { id: 'audit-logs', label: '审计日志', icon: 'FileText', section: 'system', roles: ['admin', 'dba'] },
   { id: 'workflow', label: '审批流程', icon: 'GitBranch', section: 'system', roles: ['admin', 'dba'] },
   { id: 'auto-task', label: '自动任务', icon: 'Clock', section: 'system', roles: ['admin'] },
-  { id: 'announcement', label: '公告管理', icon: 'Megaphone', section: 'system', roles: ['admin'] },
-  { id: 'config-platform', label: '配置平台', icon: 'Settings', section: 'config', roles: ['admin'] },
+  { id: 'settings', label: '系统设置', icon: 'Settings', section: 'config', roles: ['admin'] },
 ];
 
 export const currentUser = {
diff --git a/frontend/src/pages/AnnouncementPage.tsx b/frontend/src/pages/AnnouncementPage.tsx
index 9e2b194..2200293 100644
--- a/frontend/src/pages/AnnouncementPage.tsx
+++ b/frontend/src/pages/AnnouncementPage.tsx
@@ -1,350 +1,344 @@
-import { useState } from 'react';
-import {
-  Megaphone, Plus, Edit2, Trash2, Pin, PinOff, Eye, Clock,
-  CheckCircle, X, Save, AlertTriangle, Send, Calendar
-} from 'lucide-react';
-import { Card, CardContent } from '@/components/ui/card';
-import { Switch } from '@/components/ui/switch';
+import { useState, useEffect, useCallback } from 'react';
+import request from '@/api/request';
+import { Megaphone, Plus, Edit2, Trash2, Eye, Clock, CheckCircle, X, Save } from 'lucide-react';
 
-type AnnouncementPriority = 'urgent' | 'high' | 'normal' | 'low';
-
-type Announcement = {
-  id: string;
+/* ── types ── */
+interface Announcement {
+  id: number;
   title: string;
   content: string;
-  priority: AnnouncementPriority;
-  pinned: boolean;
-  enabled: boolean;
-  author: string;
-  publishTime: string;
-  expireTime: string;
-  readCount: number;
-  targetRoles: string[];
-};
+  is_published: boolean;
+  published_at: string | null;
+  created_at: string;
+}
 
-const priorityLabels: Record<AnnouncementPriority, string> = {
-  urgent: '紧急',
-  high: '重要',
-  normal: '普通',
-  low: '低',
-};
-
-const priorityColors: Record<AnnouncementPriority, string> = {
-  urgent: 'bg-red-500/15 text-red-400 border-red-500/30',
-  high: 'bg-orange-500/15 text-orange-400 border-orange-500/30',
-  normal: 'bg-blue-500/15 text-blue-400 border-blue-500/30',
-  low: 'bg-gray-500/15 text-gray-400 border-gray-500/30',
-};
-
-const roleOptions = [
-  { id: 'admin', label: '超级管理员' },
-  { id: 'dba', label: '数据库管理员' },
-  { id: 'developer', label: '开发人员' },
-  { id: 'guest', label: '访客' },
-];
-
-const initialAnnouncements: Announcement[] = [
-  {
-    id: 'ann-1', title: '【系统维护】本周日凌晨 2:00-4:00 数据库升级维护',
-    content: '计划于本周日（2024年1月21日）凌晨 2:00-4:00 进行数据库版本升级，期间以下服务将不可用：\n1. 数据变更工单提交和审批\n2. 在线 SQL 查询\n3. 数据导出功能\n\n请提前安排工作，避免在维护时段提交重要工单。如有紧急情况，请联系 DBA 团队。',
-    priority: 'urgent', pinned: true, enabled: true, author: 'admin',
-    publishTime: '2024-01-15 10:00:00', expireTime: '2024-01-22 00:00:00',
-    readCount: 156, targetRoles: ['admin', 'dba', 'developer', 'guest'],
-  },
-  {
-    id: 'ann-2', title: '【安全提醒】禁止使用 SELECT * 查询生产数据库',
-    content: '为加强数据安全，即日起严禁使用 SELECT * 查询生产环境数据库。所有查询必须明确指定所需字段名。\n\n审核规则已更新（规则编号 R002），违规查询将被自动拦截并记录审计日志。',
-    priority: 'high', pinned: true, enabled: true, author: 'admin',
-    publishTime: '2024-01-14 09:00:00', expireTime: '2024-02-14 00:00:00',
-    readCount: 234, targetRoles: ['admin', 'dba', 'developer'],
-  },
-  {
-    id: 'ann-3', title: '【新功能】SQL 变更自动回滚功能已上线',
-    content: 'SQL 变更工单现已支持自动回滚功能。对于 UPDATE 和 DELETE 操作，系统会自动：\n1. 基于 Binlog ROW 格式生成逆向回滚语句\n2. 执行前备份受影响数据\n3. 提供一键回滚入口（执行后 72 小时内有效）\n\n使用要求：\n- MySQL 必须开启 Binlog ROW 格式\n- 操作表必须有主键\n- 单次操作影响行数不超过 10,000 行',
-    priority: 'normal', pinned: false, enabled: true, author: 'zhangsan',
-    publishTime: '2024-01-13 14:00:00', expireTime: '2024-04-13 00:00:00',
-    readCount: 89, targetRoles: ['admin', 'dba', 'developer'],
-  },
-  {
-    id: 'ann-4', title: '【培训通知】SQL 审核规范培训 - 1月25日',
-    content: '时间：2024年1月25日 14:00-16:00\n地点：会议室 A\n讲师：DBA 团队负责人\n\n培训内容：\n1. SQL 变更工单提交流程\n2. 审核规则详解\n3. 回滚操作最佳实践\n4. 常见问题排查\n\n请相关人员准时参加。',
-    priority: 'normal', pinned: false, enabled: true, author: 'lisi',
-    publishTime: '2024-01-12 10:00:00', expireTime: '2024-01-26 00:00:00',
-    readCount: 67, targetRoles: ['developer'],
-  },
-  {
-    id: 'ann-5', title: '【版本更新】SQL-Platform v2.5.0 更新日志',
-    content: '本次更新内容：\n\n新增功能：\n- 支持多数据源统一管理\n- 查询审计新增敏感字段自动脱敏\n- 工单批量审批功能\n\n优化改进：\n- SQL 编辑器性能优化\n- 审批流程可视化升级\n- 通知渠道新增 Telegram 支持\n\nBug 修复：\n- 修复大结果集导出内存溢出问题\n- 修复 Redis 集群连接超时问题',
-    priority: 'low', pinned: false, enabled: false, author: 'admin',
-    publishTime: '2024-01-10 16:00:00', expireTime: '2024-02-10 00:00:00',
-    readCount: 45, targetRoles: ['admin', 'dba', 'developer', 'guest'],
-  },
-];
+/* ── simple markdown → html ── */
+function simpleMarkdown(md: string): string {
+  let html = md
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;');
+  // bold **text** or __text__
+  html = html.replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>');
+  html = html.replace(/__(.+?)__/g, '<strong>$1</strong>');
+  // italic *text* or _text_
+  html = html.replace(/\*(.+?)\*/g, '<em>$1</em>');
+  html = html.replace(/_(.+?)_/g, '<em>$1</em>');
+  // `code`
+  html = html.replace(/`(.+?)`/g, '<code class="px-1 py-0.5 rounded bg-[var(--dg-bg-tertiary)] text-sm">$1</code>');
+  // headings
+  html = html.replace(/^### (.+)$/gm, '<h4 class="text-base font-semibold mt-3 mb-1">$1</h4>');
+  html = html.replace(/^## (.+)$/gm, '<h3 class="text-lg font-semibold mt-3 mb-1">$1</h3>');
+  html = html.replace(/^# (.+)$/gm, '<h2 class="text-xl font-bold mt-3 mb-1">$1</h2>');
+  // unordered list items
+  html = html.replace(/^- (.+)$/gm, '<li class="ml-4 list-disc">$1</li>');
+  html = html.replace(/^\* (.+)$/gm, '<li class="ml-4 list-disc">$1</li>');
+  // numbered list
+  html = html.replace(/^(\d+)\. (.+)$/gm, '<li class="ml-4 list-decimal">$2</li>');
+  // horizontal rule
+  html = html.replace(/^---$/gm, '<hr class="border-[var(--dg-border)] my-3" />');
+  // line breaks
+  html = html.replace(/\n/g, '<br />');
+  return html;
+}
 
 export default function AnnouncementPage() {
-  const [announcements, setAnnouncements] = useState<Announcement[]>(initialAnnouncements);
-  const [showCreate, setShowCreate] = useState(false);
-  const [editingAnn, setEditingAnn] = useState<Announcement | null>(null);
-  const [previewAnn, setPreviewAnn] = useState<Announcement | null>(null);
+  const [announcements, setAnnouncements] = useState<Announcement[]>([]);
+  const [loading, setLoading] = useState(false);
 
-  // 表单
+  /* modal state */
+  const [showModal, setShowModal] = useState(false);
+  const [editingId, setEditingId] = useState<number | null>(null);
   const [formTitle, setFormTitle] = useState('');
   const [formContent, setFormContent] = useState('');
-  const [formPriority, setFormPriority] = useState<AnnouncementPriority>('normal');
-  const [formPinned, setFormPinned] = useState(false);
-  const [formTargetRoles, setFormTargetRoles] = useState<string[]>(['admin', 'dba', 'developer', 'guest']);
-  const [formExpireTime, setFormExpireTime] = useState('');
+  const [showPreview, setShowPreview] = useState(false);
+  const [saving, setSaving] = useState(false);
 
-  const resetForm = () => {
+  /* view preview */
+  const [viewAnn, setViewAnn] = useState<Announcement | null>(null);
+
+  const fetchList = useCallback(async () => {
+    try {
+      setLoading(true);
+      const res = await request.get('/announcements');
+      setAnnouncements(Array.isArray(res.data) ? res.data : Array.isArray(res) ? res : []);
+    } catch {
+      setAnnouncements([]);
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    fetchList();
+  }, [fetchList]);
+
+  /* ── helpers ── */
+  const openCreate = () => {
+    setEditingId(null);
     setFormTitle('');
     setFormContent('');
-    setFormPriority('normal');
-    setFormPinned(false);
-    setFormTargetRoles(['admin', 'dba', 'developer', 'guest']);
-    setFormExpireTime('');
-  };
-
-  const openCreate = () => {
-    resetForm();
-    setEditingAnn(null);
-    setShowCreate(true);
+    setShowPreview(false);
+    setShowModal(true);
   };
 
   const openEdit = (ann: Announcement) => {
+    setEditingId(ann.id);
     setFormTitle(ann.title);
     setFormContent(ann.content);
-    setFormPriority(ann.priority);
-    setFormPinned(ann.pinned);
-    setFormTargetRoles([...ann.targetRoles]);
-    setFormExpireTime(ann.expireTime);
-    setEditingAnn(ann);
-    setShowCreate(true);
+    setShowPreview(false);
+    setShowModal(true);
   };
 
-  const toggleRole = (role: string) => {
-    setFormTargetRoles(prev =>
-      prev.includes(role) ? prev.filter(r => r !== role) : [...prev, role]
-    );
-  };
-
-  const saveAnnouncement = () => {
+  const handleSave = async () => {
     if (!formTitle.trim() || !formContent.trim()) return;
-    const now = '2024-01-15 12:00:00';
-    if (editingAnn) {
-      setAnnouncements(prev => prev.map(a => a.id === editingAnn.id ? {
-        ...a,
-        title: formTitle,
-        content: formContent,
-        priority: formPriority,
-        pinned: formPinned,
-        targetRoles: [...formTargetRoles],
-        expireTime: formExpireTime || a.expireTime,
-      } : a));
-    } else {
-      const newAnn: Announcement = {
-        id: `ann-${Date.now()}`,
-        title: formTitle,
-        content: formContent,
-        priority: formPriority,
-        pinned: formPinned,
-        enabled: true,
-        author: 'admin',
-        publishTime: now,
-        expireTime: formExpireTime || '2024-12-31 00:00:00',
-        readCount: 0,
-        targetRoles: [...formTargetRoles],
-      };
-      setAnnouncements(prev => [newAnn, ...prev]);
+    try {
+      setSaving(true);
+      if (editingId) {
+        await request.put(`/announcements/${editingId}`, { title: formTitle, content: formContent });
+      } else {
+        await request.post('/announcements', { title: formTitle, content: formContent });
+      }
+      setShowModal(false);
+      fetchList();
+    } catch (err: any) {
+      alert(err.response?.data?.detail || '保存失败');
+    } finally {
+      setSaving(false);
     }
-    setShowCreate(false);
   };
 
-  const togglePin = (id: string) => {
-    setAnnouncements(prev => prev.map(a => a.id === id ? { ...a, pinned: !a.pinned } : a));
+  const handleTogglePublish = async (ann: Announcement) => {
+    try {
+      await request.put(`/announcements/${ann.id}`, { is_published: !ann.is_published });
+      fetchList();
+    } catch {
+      /* ignore */
+    }
   };
 
-  const toggleEnable = (id: string) => {
-    setAnnouncements(prev => prev.map(a => a.id === id ? { ...a, enabled: !a.enabled } : a));
+  const handleDelete = async (id: number) => {
+    if (!confirm('确定删除此公告？')) return;
+    try {
+      await request.delete(`/announcements/${id}`);
+      fetchList();
+    } catch {
+      /* ignore */
+    }
   };
 
-  const deleteAnnouncement = (id: string) => {
-    setAnnouncements(prev => prev.filter(a => a.id !== id));
-  };
-
-  const sortedAnnouncements = [...announcements].sort((a, b) => {
-    if (a.pinned !== b.pinned) return a.pinned ? -1 : 1;
-    return new Date(b.publishTime).getTime() - new Date(a.publishTime).getTime();
-  });
-
+  /* ── render ── */
   return (
     <div className="space-y-5">
+      {/* Header */}
       <div className="flex items-center justify-between">
         <div>
-          <h1 className="text-2xl font-semibold">公告管理</h1>
-          <p className="text-sm text-[var(--dg-text-secondary)] mt-1">发布和管理系统公告，支持按角色定向推送</p>
+          <h1 className="text-xl font-semibold text-[var(--dg-text-primary)]">公告管理</h1>
+          <p className="text-sm text-[var(--dg-text-muted)] mt-1">发布和管理系统公告，支持 Markdown 格式</p>
         </div>
-        <button onClick={openCreate} className="flex items-center gap-2 px-4 py-2.5 bg-gradient-to-r from-blue-500 to-purple-600 rounded-lg text-sm font-medium text-white hover:opacity-90 transition-opacity">
-          <Plus className="w-4 h-4" /> 发布公告
+        <button
+          onClick={openCreate}
+          className="flex items-center gap-2 px-4 py-2 text-sm font-medium rounded-lg bg-[var(--dg-blue)] text-white hover:opacity-90 transition-opacity"
+        >
+          <Plus className="w-4 h-4" /> 创建公告
         </button>
       </div>
 
-      <div className="grid grid-cols-4 gap-4">
+      {/* Stats */}
+      <div className="grid grid-cols-3 gap-4">
         {[
-          { label: '公告总数', value: announcements.length, icon: Megaphone, color: 'text-blue-400', bg: 'bg-blue-400/10' },
-          { label: '已置顶', value: announcements.filter(a => a.pinned).length, icon: Pin, color: 'text-purple-400', bg: 'bg-purple-400/10' },
-          { label: '生效中', value: announcements.filter(a => a.enabled).length, icon: CheckCircle, color: 'text-green-400', bg: 'bg-green-400/10' },
-          { label: '已失效', value: announcements.filter(a => !a.enabled).length, icon: AlertTriangle, color: 'text-red-400', bg: 'bg-red-400/10' },
+          { label: '公告总数', value: announcements.length, color: 'text-blue-400', bg: 'bg-blue-400/10' },
+          { label: '已发布', value: announcements.filter(a => a.is_published).length, color: 'text-green-400', bg: 'bg-green-400/10' },
+          { label: '草稿', value: announcements.filter(a => !a.is_published).length, color: 'text-yellow-400', bg: 'bg-yellow-400/10' },
         ].map((s, i) => (
-          <Card key={i} className="dg-card">
-            <CardContent className="p-4 flex items-center gap-3">
-              <div className={`w-10 h-10 rounded-lg ${s.bg} flex items-center justify-center`}><s.icon className={`w-5 h-5 ${s.color}`} /></div>
-              <div><div className="text-2xl font-bold">{s.value}</div><div className="text-xs text-[var(--dg-text-muted)]">{s.label}</div></div>
-            </CardContent>
-          </Card>
+          <div key={i} className="dg-card p-4 flex items-center gap-3">
+            <div className={`w-10 h-10 rounded-lg ${s.bg} flex items-center justify-center`}>
+              <Megaphone className={`w-5 h-5 ${s.color}`} />
+            </div>
+            <div>
+              <div className="text-2xl font-bold text-[var(--dg-text-primary)]">{s.value}</div>
+              <div className="text-xs text-[var(--dg-text-muted)]">{s.label}</div>
+            </div>
+          </div>
         ))}
       </div>
 
-      <div className="space-y-3">
-        {sortedAnnouncements.map(ann => (
-          <Card key={ann.id} className={`dg-card ${!ann.enabled ? 'opacity-50' : ''} ${ann.pinned ? 'border-l-2 border-l-purple-500' : ''}`}>
-            <CardContent className="p-5">
-              <div className="flex items-start justify-between">
-                <div className="flex-1">
-                  <div className="flex items-center gap-2 mb-2">
-                    {ann.pinned && <Pin className="w-4 h-4 text-purple-400" />}
-                    <h3 className="font-semibold text-sm">{ann.title}</h3>
-                    <span className={`text-[11px] px-2 py-0.5 rounded-full border ${priorityColors[ann.priority]}`}>
-                      {priorityLabels[ann.priority]}
-                    </span>
-                    {!ann.enabled && <span className="text-[11px] px-2 py-0.5 rounded-full bg-[var(--dg-bg-tertiary)] text-[var(--dg-text-muted)]">已失效</span>}
-                  </div>
-                  <p className="text-xs text-[var(--dg-text-secondary)] line-clamp-2 mb-3">{ann.content.replace(/\n/g, ' ')}</p>
-                  <div className="flex items-center gap-4 text-xs text-[var(--dg-text-muted)]">
-                    <span className="flex items-center gap-1"><Send className="w-3 h-3" /> {ann.author}</span>
-                    <span className="flex items-center gap-1"><Clock className="w-3 h-3" /> {ann.publishTime}</span>
-                    <span className="flex items-center gap-1"><Calendar className="w-3 h-3" /> 到期: {ann.expireTime}</span>
-                    <span className="flex items-center gap-1"><Eye className="w-3 h-3" /> {ann.readCount} 次阅读</span>
-                    <div className="flex items-center gap-1">
-                      <span>可见范围:</span>
-                      {ann.targetRoles.map(r => (
-                        <span key={r} className="text-[10px] px-1.5 py-0.5 bg-blue-500/10 text-blue-400 rounded">
-                          {r === 'admin' ? '管理员' : r === 'dba' ? 'DBA' : r === 'developer' ? '开发' : '访客'}
-                        </span>
-                      ))}
-                    </div>
-                  </div>
+      {/* List */}
+      {loading ? (
+        <div className="dg-card p-8 text-center text-[var(--dg-text-muted)] text-sm">加载中…</div>
+      ) : announcements.length === 0 ? (
+        <div className="dg-card p-8 text-center text-[var(--dg-text-muted)] text-sm">暂无公告，点击右上角创建</div>
+      ) : (
+        <div className="space-y-3">
+          {announcements.map(ann => (
+            <div key={ann.id} className={`dg-card px-5 py-4 flex items-center gap-4 ${!ann.is_published ? 'opacity-60' : ''}`}>
+              <div className="flex-1 min-w-0">
+                <div className="flex items-center gap-2 mb-1">
+                  <h3 className="text-sm font-medium text-[var(--dg-text-primary)] truncate">{ann.title}</h3>
+                  <span
+                    className={`text-[11px] px-2 py-0.5 rounded-full flex-shrink-0 ${
+                      ann.is_published
+                        ? 'bg-green-500/15 text-green-400'
+                        : 'bg-yellow-500/15 text-yellow-400'
+                    }`}
+                  >
+                    {ann.is_published ? '已发布' : '草稿'}
+                  </span>
                 </div>
-                <div className="flex items-center gap-1 ml-4">
-                  <button onClick={() => togglePin(ann.id)} className="w-8 h-8 rounded-lg flex items-center justify-center text-[var(--dg-text-secondary)] hover:bg-purple-500/15 hover:text-purple-400 transition-colors" title={ann.pinned ? '取消置顶' : '置顶'}>
-                    {ann.pinned ? <PinOff className="w-4 h-4" /> : <Pin className="w-4 h-4" />}
-                  </button>
-                  <button onClick={() => setPreviewAnn(ann)} className="w-8 h-8 rounded-lg flex items-center justify-center text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)] transition-colors" title="预览">
-                    <Eye className="w-4 h-4" />
-                  </button>
-                  <button onClick={() => openEdit(ann)} className="w-8 h-8 rounded-lg flex items-center justify-center text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)] transition-colors" title="编辑">
-                    <Edit2 className="w-4 h-4" />
-                  </button>
-                  <button onClick={() => toggleEnable(ann.id)} className="w-8 h-8 rounded-lg flex items-center justify-center transition-colors" title={ann.enabled ? '失效' : '生效'}>
-                    {ann.enabled ? <CheckCircle className="w-4 h-4 text-green-400" /> : <AlertTriangle className="w-4 h-4 text-yellow-400" />}
-                  </button>
-                  <button onClick={() => deleteAnnouncement(ann.id)} className="w-8 h-8 rounded-lg flex items-center justify-center text-[var(--dg-text-secondary)] hover:bg-red-500/15 hover:text-red-400 transition-colors" title="删除">
-                    <Trash2 className="w-4 h-4" />
-                  </button>
+                <p className="text-xs text-[var(--dg-text-muted)] truncate">{ann.content.replace(/\n/g, ' ')}</p>
+                <div className="flex items-center gap-3 mt-2 text-xs text-[var(--dg-text-muted)]">
+                  <span className="flex items-center gap-1"><Clock className="w-3 h-3" /> {ann.created_at}</span>
+                  {ann.published_at && (
+                    <span className="flex items-center gap-1"><CheckCircle className="w-3 h-3" /> 发布于 {ann.published_at}</span>
+                  )}
                 </div>
               </div>
-            </CardContent>
-          </Card>
-        ))}
-      </div>
+              <div className="flex items-center gap-1 flex-shrink-0">
+                <button
+                  onClick={() => setViewAnn(ann)}
+                  className="w-8 h-8 rounded-lg flex items-center justify-center text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)] transition-colors"
+                  title="预览"
+                >
+                  <Eye className="w-4 h-4" />
+                </button>
+                <button
+                  onClick={() => openEdit(ann)}
+                  className="w-8 h-8 rounded-lg flex items-center justify-center text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)] transition-colors"
+                  title="编辑"
+                >
+                  <Edit2 className="w-4 h-4" />
+                </button>
+                <button
+                  onClick={() => handleTogglePublish(ann)}
+                  className={`px-3 py-1.5 rounded-lg text-xs font-medium transition-colors ${
+                    ann.is_published
+                      ? 'bg-yellow-500/15 text-yellow-400 hover:bg-yellow-500/25'
+                      : 'bg-green-500/15 text-green-400 hover:bg-green-500/25'
+                  }`}
+                >
+                  {ann.is_published ? '取消发布' : '发布'}
+                </button>
+                <button
+                  onClick={() => handleDelete(ann.id)}
+                  className="w-8 h-8 rounded-lg flex items-center justify-center text-[var(--dg-text-secondary)] hover:bg-red-500/15 hover:text-red-400 transition-colors"
+                  title="删除"
+                >
+                  <Trash2 className="w-4 h-4" />
+                </button>
+              </div>
+            </div>
+          ))}
+        </div>
+      )}
 
-      {/* 预览弹窗 */}
-      {previewAnn && (
-        <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm" onClick={() => setPreviewAnn(null)}>
-          <div className="bg-[var(--dg-bg-secondary)] border border-[var(--dg-border)] rounded-xl p-6 max-w-2xl w-full mx-4" onClick={e => e.stopPropagation()}>
+      {/* ── View Preview Modal ── */}
+      {viewAnn && (
+        <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm" onClick={() => setViewAnn(null)}>
+          <div
+            className="bg-[var(--dg-bg-secondary)] border border-[var(--dg-border)] rounded-xl p-6 max-w-2xl w-full mx-4 max-h-[85vh] overflow-y-auto"
+            onClick={e => e.stopPropagation()}
+          >
             <div className="flex items-center justify-between mb-4">
               <div className="flex items-center gap-2">
-                <h3 className="text-lg font-semibold">{previewAnn.title}</h3>
-                <span className={`text-[11px] px-2 py-0.5 rounded-full border ${priorityColors[previewAnn.priority]}`}>
-                  {priorityLabels[previewAnn.priority]}
+                <h3 className="text-lg font-semibold text-[var(--dg-text-primary)]">{viewAnn.title}</h3>
+                <span
+                  className={`text-[11px] px-2 py-0.5 rounded-full ${
+                    viewAnn.is_published ? 'bg-green-500/15 text-green-400' : 'bg-yellow-500/15 text-yellow-400'
+                  }`}
+                >
+                  {viewAnn.is_published ? '已发布' : '草稿'}
                 </span>
               </div>
-              <button onClick={() => setPreviewAnn(null)} className="w-8 h-8 rounded-lg flex items-center justify-center hover:bg-[var(--dg-bg-hover)] transition-colors">
+              <button onClick={() => setViewAnn(null)} className="w-8 h-8 rounded-lg flex items-center justify-center hover:bg-[var(--dg-bg-hover)]">
                 <X className="w-5 h-5" />
               </button>
             </div>
             <div className="text-xs text-[var(--dg-text-muted)] flex items-center gap-3 mb-4 pb-3 border-b border-[var(--dg-border)]">
-              <span className="flex items-center gap-1"><Send className="w-3 h-3" /> {previewAnn.author}</span>
-              <span className="flex items-center gap-1"><Clock className="w-3 h-3" /> {previewAnn.publishTime}</span>
-              <span className="flex items-center gap-1"><Eye className="w-3 h-3" /> {previewAnn.readCount} 次阅读</span>
-            </div>
-            <div className="text-sm text-[var(--dg-text-secondary)] whitespace-pre-line leading-relaxed max-h-96 overflow-y-auto">
-              {previewAnn.content}
-            </div>
-            <div className="flex justify-end mt-4 pt-4 border-t border-[var(--dg-border)]">
-              <button onClick={() => setPreviewAnn(null)} className="px-5 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm hover:bg-[var(--dg-bg-hover)] transition-colors">关闭</button>
+              <span className="flex items-center gap-1"><Clock className="w-3 h-3" /> {viewAnn.created_at}</span>
             </div>
+            <div
+              className="text-sm text-[var(--dg-text-secondary)] leading-relaxed prose-sm"
+              dangerouslySetInnerHTML={{ __html: simpleMarkdown(viewAnn.content) }}
+            />
           </div>
         </div>
       )}
 
-      {/* 创建/编辑弹窗 */}
-      {showCreate && (
-        <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm" onClick={() => setShowCreate(false)}>
-          <div className="bg-[var(--dg-bg-secondary)] border border-[var(--dg-border)] rounded-xl p-6 max-w-2xl w-full mx-4 max-h-[90vh] overflow-y-auto" onClick={e => e.stopPropagation()}>
+      {/* ── Create / Edit Modal ── */}
+      {showModal && (
+        <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm" onClick={() => setShowModal(false)}>
+          <div
+            className="bg-[var(--dg-bg-secondary)] border border-[var(--dg-border)] rounded-xl p-6 max-w-3xl w-full mx-4 max-h-[90vh] overflow-y-auto"
+            onClick={e => e.stopPropagation()}
+          >
             <div className="flex items-center justify-between mb-6">
-              <h3 className="text-xl font-semibold">{editingAnn ? '编辑公告' : '发布公告'}</h3>
-              <button onClick={() => setShowCreate(false)} className="w-8 h-8 rounded-lg flex items-center justify-center hover:bg-[var(--dg-bg-hover)] transition-colors">
+              <h3 className="text-xl font-semibold text-[var(--dg-text-primary)]">{editingId ? '编辑公告' : '创建公告'}</h3>
+              <button onClick={() => setShowModal(false)} className="w-8 h-8 rounded-lg flex items-center justify-center hover:bg-[var(--dg-bg-hover)]">
                 <X className="w-5 h-5" />
               </button>
             </div>
+
             <div className="space-y-4">
               <div>
-                <label className="text-xs text-[var(--dg-text-muted)] mb-1.5 block">公告标题 <span className="text-red-400">*</span></label>
-                <input type="text" value={formTitle} onChange={e => setFormTitle(e.target.value)} className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm focus:outline-none focus:border-blue-500" placeholder="输入公告标题" />
+                <label className="text-xs text-[var(--dg-text-muted)] mb-1.5 block">
+                  标题 <span className="text-red-400">*</span>
+                </label>
+                <input
+                  type="text"
+                  value={formTitle}
+                  onChange={e => setFormTitle(e.target.value)}
+                  className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+                  placeholder="输入公告标题"
+                />
               </div>
+
               <div>
-                <label className="text-xs text-[var(--dg-text-muted)] mb-1.5 block">公告内容 <span className="text-red-400">*</span></label>
-                <textarea value={formContent} onChange={e => setFormContent(e.target.value)} className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm focus:outline-none focus:border-blue-500 resize-none" rows={8} placeholder="输入公告内容，支持多行文本..." />
-              </div>
-              <div className="grid grid-cols-2 gap-3">
-                <div>
-                  <label className="text-xs text-[var(--dg-text-muted)] mb-1.5 block">优先级</label>
-                  <select value={formPriority} onChange={e => setFormPriority(e.target.value as AnnouncementPriority)} className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm focus:outline-none focus:border-blue-500">
-                    {Object.entries(priorityLabels).map(([k, v]) => <option key={k} value={k}>{v}</option>)}
-                  </select>
-                </div>
-                <div>
-                  <label className="text-xs text-[var(--dg-text-muted)] mb-1.5 block">到期时间</label>
-                  <input type="datetime-local" value={formExpireTime} onChange={e => setFormExpireTime(e.target.value)} className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm focus:outline-none focus:border-blue-500" />
-                </div>
-              </div>
-              <div className="flex items-center gap-3">
-                <Switch checked={formPinned} onCheckedChange={setFormPinned} />
-                <span className="text-sm">置顶公告</span>
-              </div>
-              <div>
-                <label className="text-xs text-[var(--dg-text-muted)] mb-2 block">可见角色</label>
-                <div className="flex flex-wrap gap-2">
-                  {roleOptions.map(role => (
-                    <button
-                      key={role.id}
-                      onClick={() => toggleRole(role.id)}
-                      className={`px-3 py-1.5 rounded-lg text-xs border transition-colors ${
-                        formTargetRoles.includes(role.id)
-                          ? 'bg-blue-500/15 text-blue-400 border-blue-500/30'
-                          : 'bg-[var(--dg-bg-tertiary)] text-[var(--dg-text-muted)] border-[var(--dg-border)]'
-                      }`}
-                    >
-                      {role.label}
-                    </button>
-                  ))}
+                <div className="flex items-center justify-between mb-1.5">
+                  <label className="text-xs text-[var(--dg-text-muted)]">
+                    内容 <span className="text-red-400">*</span> <span className="text-[var(--dg-text-muted)]">（支持 Markdown）</span>
+                  </label>
+                  <button
+                    onClick={() => setShowPreview(!showPreview)}
+                    className={`text-xs px-2 py-1 rounded transition-colors ${
+                      showPreview
+                        ? 'bg-[var(--dg-blue)] text-white'
+                        : 'bg-[var(--dg-bg-tertiary)] text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)]'
+                    }`}
+                  >
+                    {showPreview ? '编辑' : '预览'}
+                  </button>
                 </div>
+
+                {showPreview ? (
+                  <div
+                    className="w-full min-h-[200px] px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-secondary)] leading-relaxed overflow-auto"
+                    dangerouslySetInnerHTML={{ __html: simpleMarkdown(formContent) }}
+                  />
+                ) : (
+                  <textarea
+                    value={formContent}
+                    onChange={e => setFormContent(e.target.value)}
+                    className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)] resize-none font-mono"
+                    rows={12}
+                    placeholder="输入公告内容，支持 Markdown 语法...&#10;&#10;**粗体**  *斜体*  `代码`&#10;## 二级标题&#10;- 列表项&#10;1. 有序列表"
+                  />
+                )}
               </div>
             </div>
+
             <div className="flex justify-end gap-3 mt-6 pt-4 border-t border-[var(--dg-border)]">
-              <button onClick={() => setShowCreate(false)} className="px-5 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm hover:bg-[var(--dg-bg-hover)] transition-colors">取消</button>
-              <button onClick={saveAnnouncement} disabled={!formTitle.trim() || !formContent.trim()} className="flex items-center gap-2 px-5 py-2.5 bg-gradient-to-r from-blue-500 to-purple-600 rounded-lg text-sm font-medium text-white hover:opacity-90 transition-opacity disabled:opacity-50 disabled:cursor-not-allowed">
-                <Save className="w-4 h-4" /> {editingAnn ? '保存修改' : '发布公告'}
+              <button
+                onClick={() => setShowModal(false)}
+                className="px-5 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)] transition-colors"
+              >
+                取消
+              </button>
+              <button
+                onClick={handleSave}
+                disabled={!formTitle.trim() || !formContent.trim() || saving}
+                className="flex items-center gap-2 px-5 py-2.5 bg-[var(--dg-blue)] rounded-lg text-sm font-medium text-white hover:opacity-90 transition-opacity disabled:opacity-50 disabled:cursor-not-allowed"
+              >
+                <Save className="w-4 h-4" /> {saving ? '保存中…' : editingId ? '保存修改' : '创建'}
               </button>
             </div>
           </div>
diff --git a/frontend/src/pages/AuditRulesPage.tsx b/frontend/src/pages/AuditRulesPage.tsx
index b024bf3..bafb832 100644
--- a/frontend/src/pages/AuditRulesPage.tsx
+++ b/frontend/src/pages/AuditRulesPage.tsx
@@ -1,4 +1,4 @@
-import { useState, useEffect } from 'react';
+import { useState, useEffect, useCallback } from 'react';
 import request from '../api/request';
 
 interface AuditRule {
@@ -11,278 +11,237 @@ interface AuditRule {
   pattern: string | null;
   is_enabled: boolean;
   message: string;
+  value: string | null;
   created_at: string;
   updated_at: string;
 }
 
-const RULE_TYPES = [
-  { value: 'syntax', label: '语法检查', color: 'bg-blue-100 text-blue-700' },
-  { value: 'performance', label: '性能优化', color: 'bg-yellow-100 text-yellow-700' },
-  { value: 'safety', label: '安全检查', color: 'bg-red-100 text-red-700' },
-  { value: 'naming', label: '命名规范', color: 'bg-green-100 text-green-700' },
-];
+const DB_TABS = [
+  { key: 'mysql', label: 'MySQL', icon: '🐬' },
+  { key: 'postgresql', label: 'PostgreSQL', icon: '🐘' },
+  { key: 'redis', label: 'Redis', icon: '🔴' },
+] as const;
 
-const SEVERITY_MAP: Record<string, { label: string; color: string }> = {
-  error: { label: '错误', color: 'bg-red-500 text-white' },
-  warning: { label: '警告', color: 'bg-yellow-500 text-white' },
-  info: { label: '提示', color: 'bg-blue-500 text-white' },
-};
+type DbType = (typeof DB_TABS)[number]['key'];
+
+function isDDL(name: string): boolean {
+  const ddlKeywords = [
+    'DDL', 'CREATE', 'ALTER', 'DROP', 'TRUNCATE', 'RENAME',
+    'TABLE', 'INDEX', 'KEY', 'COLUMN', 'PARTITION',
+  ];
+  const upper = name.toUpperCase();
+  return ddlKeywords.some((kw) => upper.includes(kw));
+}
 
 export default function AuditRulesPage() {
+  const [activeTab, setActiveTab] = useState<DbType>('mysql');
   const [rules, setRules] = useState<AuditRule[]>([]);
-  const [loading, setLoading] = useState(true);
-  const [filter, setFilter] = useState({ rule_type: '', severity: '', is_enabled: '' });
-  const [showCreate, setShowCreate] = useState(false);
-  const [stats, setStats] = useState<any>(null);
-  const [form, setForm] = useState({
-    name: '', description: '', rule_type: 'safety', severity: 'warning',
-    db_type: 'mysql', pattern: '', is_enabled: true, message: '',
-  });
+  const [loading, setLoading] = useState(false);
+  const [seeding, setSeeding] = useState(false);
+  const [editingValue, setEditingValue] = useState<Record<number, string>>({});
+  const [saving, setSaving] = useState<Record<number, boolean>>({});
 
-  useEffect(() => { fetchRules(); fetchStats(); }, []);
-
-  async function fetchRules() {
+  const fetchRules = useCallback(async (dbType: DbType) => {
     try {
       setLoading(true);
-      const params = new URLSearchParams();
-      if (filter.rule_type) params.set('rule_type', filter.rule_type);
-      if (filter.severity) params.set('severity', filter.severity);
-      if (filter.is_enabled !== '') params.set('is_enabled', filter.is_enabled);
-      const res = await request.get('/audit-rules', { params });
-      setRules(Array.isArray(res.data) ? res.data : []);
-    } catch { setRules([]); } finally { setLoading(false); }
-  }
-
-  async function fetchStats() {
-    try {
-      const res = await request.get('/audit-rules/stats/summary');
-      setStats(res.data || null);
-    } catch { setStats(null); }
-  }
-
-  async function handleCreate() {
-    try {
-      await request.post('/audit-rules', form);
-      setShowCreate(false);
-      setForm({ name: '', description: '', rule_type: 'safety', severity: 'warning', db_type: 'mysql', pattern: '', is_enabled: true, message: '' });
-      fetchRules();
-      fetchStats();
-    } catch (err: any) {
-      alert(err.response?.data?.detail || '创建失败');
+      const res = await request.get('/audit-rules', {
+        params: { db_type: dbType },
+      });
+      setRules(Array.isArray(res.data) ? res.data : Array.isArray(res) ? res : []);
+    } catch {
+      setRules([]);
+    } finally {
+      setLoading(false);
     }
-  }
+  }, []);
 
-  async function handleToggle(rule: AuditRule) {
+  useEffect(() => {
+    fetchRules(activeTab);
+  }, [activeTab, fetchRules]);
+
+  const handleSeed = async () => {
     try {
-      await request.post('/audit-rules/' + rule.id + '/toggle');
-      fetchRules();
-      fetchStats();
-    } catch { /* */ }
-  }
+      setSeeding(true);
+      await request.post(`/audit-rules/seed/${activeTab}`);
+      fetchRules(activeTab);
+    } catch (err: any) {
+      alert(err.response?.data?.detail || '初始化失败');
+    } finally {
+      setSeeding(false);
+    }
+  };
 
-  async function handleDelete(id: number) {
-    if (!confirm('确认删除此规则？')) return;
+  const handleToggle = async (rule: AuditRule) => {
     try {
-      await request.delete('/audit-rules/' + id);
-      fetchRules();
-      fetchStats();
-    } catch { /* */ }
-  }
+      await request.post(`/audit-rules/${rule.id}/toggle`);
+      setRules((prev) =>
+        prev.map((r) => (r.id === rule.id ? { ...r, is_enabled: !r.is_enabled } : r)),
+      );
+    } catch {
+      /* ignore */
+    }
+  };
 
-  const getTypeInfo = (type: string) => RULE_TYPES.find(t => t.value === type) || RULE_TYPES[0];
-  const getSeverityInfo = (sev: string) => SEVERITY_MAP[sev] || SEVERITY_MAP.info;
+  const handleSaveValue = async (rule: AuditRule) => {
+    const newVal = editingValue[rule.id];
+    if (newVal === undefined || newVal === rule.value) return;
+    try {
+      setSaving((prev) => ({ ...prev, [rule.id]: true }));
+      await request.put(`/audit-rules/${rule.id}`, { value: newVal });
+      setRules((prev) =>
+        prev.map((r) => (r.id === rule.id ? { ...r, value: newVal } : r)),
+      );
+      setEditingValue((prev) => {
+        const next = { ...prev };
+        delete next[rule.id];
+        return next;
+      });
+    } catch {
+      /* ignore */
+    } finally {
+      setSaving((prev) => ({ ...prev, [rule.id]: false }));
+    }
+  };
+
+  // Group rules into DDL / DML
+  const ddlRules = rules.filter((r) => isDDL(r.name));
+  const dmlRules = rules.filter((r) => !isDDL(r.name));
+
+  const renderRuleGroup = (title: string, icon: string, groupRules: AuditRule[]) => {
+    if (groupRules.length === 0) return null;
+    return (
+      <div className="space-y-3">
+        <h3 className="text-sm font-semibold text-[var(--dg-text-secondary)] flex items-center gap-2 px-1">
+          <span>{icon}</span>
+          <span>{title}</span>
+          <span className="text-xs text-[var(--dg-text-muted)]">({groupRules.length})</span>
+        </h3>
+        <div className="space-y-2">
+          {groupRules.map((rule) => {
+            const hasValue = rule.value !== null && rule.value !== undefined && rule.value !== '';
+            const currentEditVal = editingValue[rule.id];
+            const displayValue = currentEditVal !== undefined ? currentEditVal : rule.value ?? '';
+
+            return (
+              <div
+                key={rule.id}
+                className={`dg-card px-4 py-3 flex items-center gap-4 transition-opacity ${
+                  !rule.is_enabled ? 'opacity-50' : ''
+                }`}
+              >
+                {/* Toggle */}
+                <button
+                  onClick={() => handleToggle(rule)}
+                  className={`relative inline-flex h-5 w-9 flex-shrink-0 cursor-pointer items-center rounded-full transition-colors duration-200 ${
+                    rule.is_enabled
+                      ? 'bg-[var(--dg-green)]'
+                      : 'bg-[var(--dg-bg-hover)]'
+                  }`}
+                >
+                  <span
+                    className={`inline-block h-3.5 w-3.5 rounded-full bg-white shadow-sm transition-transform duration-200 ${
+                      rule.is_enabled ? 'translate-x-4.5' : 'translate-x-0.5'
+                    }`}
+                  />
+                </button>
+
+                {/* Name + Message */}
+                <div className="flex-1 min-w-0">
+                  <p className="text-sm font-medium text-[var(--dg-text-primary)] leading-tight">
+                    {rule.name}
+                  </p>
+                  <p className="text-xs text-[var(--dg-text-muted)] mt-0.5 truncate">
+                    {rule.message}
+                  </p>
+                </div>
+
+                {/* Value input (if applicable) */}
+                {hasValue && (
+                  <div className="flex items-center gap-2 flex-shrink-0">
+                    <span className="text-xs text-[var(--dg-text-muted)]">=</span>
+                    <input
+                      type="text"
+                      value={displayValue}
+                      onChange={(e) =>
+                        setEditingValue((prev) => ({ ...prev, [rule.id]: e.target.value }))
+                      }
+                      onBlur={() => handleSaveValue(rule)}
+                      onKeyDown={(e) => {
+                        if (e.key === 'Enter') handleSaveValue(rule);
+                      }}
+                      disabled={saving[rule.id]}
+                      className="w-20 px-2 py-1 text-sm font-mono text-center rounded-md border border-[var(--dg-border)] bg-[var(--dg-bg-primary)] text-[var(--dg-text-primary)] focus:border-[var(--dg-blue)] focus:outline-none focus:ring-1 focus:ring-[var(--dg-input-focus-ring)] disabled:opacity-50"
+                    />
+                    {saving[rule.id] && (
+                      <span className="text-xs text-[var(--dg-text-muted)]">保存中…</span>
+                    )}
+                  </div>
+                )}
+              </div>
+            );
+          })}
+        </div>
+      </div>
+    );
+  };
 
   return (
-    <div className="space-y-6">
+    <div className="space-y-5">
       {/* Header */}
       <div className="flex items-center justify-between">
         <div>
-          <h1 className="text-xl font-semibold text-gray-900">审核规则</h1>
-          <p className="text-sm text-gray-500 mt-1">管理 SQL 审核引擎的检查规则</p>
+          <h1 className="text-xl font-semibold text-[var(--dg-text-primary)]">审核规则</h1>
+          <p className="text-sm text-[var(--dg-text-muted)] mt-1">按数据库类型管理 SQL 审核规则模版</p>
         </div>
         <button
-          onClick={() => setShowCreate(true)}
-          className="px-4 py-2 bg-blue-600 text-white rounded-lg text-sm hover:bg-blue-700"
+          onClick={handleSeed}
+          disabled={seeding}
+          className="px-4 py-2 text-sm font-medium rounded-lg bg-[var(--dg-blue)] text-white hover:opacity-90 disabled:opacity-50 transition-opacity"
         >
-          新建规则
+          {seeding ? '初始化中…' : '初始化规则'}
         </button>
       </div>
 
-      {/* Stats */}
-      {stats && (
-        <div className="grid grid-cols-4 gap-4">
-          {[
-            { label: '总规则数', value: stats.total, color: 'text-gray-900' },
-            { label: '已启用', value: stats.enabled, color: 'text-green-600' },
-            { label: '已禁用', value: stats.disabled, color: 'text-gray-400' },
-            { label: '类型', value: Object.keys(stats.by_type || {}).length, color: 'text-blue-600' },
-          ].map(s => (
-            <div key={s.label} className="bg-white rounded-lg p-4 shadow-sm">
-              <p className="text-sm text-gray-500">{s.label}</p>
-              <p className={'text-2xl font-bold ' + s.color}>{s.value}</p>
-            </div>
-          ))}
-        </div>
-      )}
-
-      {/* Filters */}
-      <div className="flex gap-3">
-        <select
-          value={filter.rule_type}
-          onChange={e => setFilter({ ...filter, rule_type: e.target.value })}
-          className="px-3 py-2 border border-gray-200 rounded-lg text-sm"
-        >
-          <option value="">全部类型</option>
-          {RULE_TYPES.map(t => <option key={t.value} value={t.value}>{t.label}</option>)}
-        </select>
-        <select
-          value={filter.severity}
-          onChange={e => setFilter({ ...filter, severity: e.target.value })}
-          className="px-3 py-2 border border-gray-200 rounded-lg text-sm"
-        >
-          <option value="">全部级别</option>
-          <option value="error">错误</option>
-          <option value="warning">警告</option>
-          <option value="info">提示</option>
-        </select>
-        <select
-          value={filter.is_enabled}
-          onChange={e => setFilter({ ...filter, is_enabled: e.target.value })}
-          className="px-3 py-2 border border-gray-200 rounded-lg text-sm"
-        >
-          <option value="">全部状态</option>
-          <option value="true">已启用</option>
-          <option value="false">已禁用</option>
-        </select>
-        <button onClick={fetchRules} className="px-3 py-2 bg-gray-100 rounded-lg text-sm hover:bg-gray-200">
-          刷新
-        </button>
+      {/* DB Type Tabs */}
+      <div className="dg-card p-1.5 flex gap-1">
+        {DB_TABS.map((tab) => (
+          <button
+            key={tab.key}
+            onClick={() => setActiveTab(tab.key)}
+            className={`flex-1 flex items-center justify-center gap-2 px-4 py-2 rounded-lg text-sm font-medium transition-colors ${
+              activeTab === tab.key
+                ? 'bg-[var(--dg-blue)] text-white'
+                : 'text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)]'
+            }`}
+          >
+            <span>{tab.icon}</span>
+            <span>{tab.label}</span>
+          </button>
+        ))}
       </div>
 
-      {/* Create Modal */}
-      {showCreate && (
-        <div className="fixed inset-0 bg-black/30 flex items-center justify-center z-50">
-          <div className="bg-white rounded-xl shadow-xl w-full max-w-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">新建审核规则</h2>
-            <div className="space-y-3">
-              <input
-                placeholder="规则名称"
-                value={form.name}
-                onChange={e => setForm({ ...form, name: e.target.value })}
-                className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm"
-              />
-              <textarea
-                placeholder="描述（可选）"
-                value={form.description}
-                onChange={e => setForm({ ...form, description: e.target.value })}
-                className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm"
-                rows={2}
-              />
-              <div className="grid grid-cols-2 gap-3">
-                <select
-                  value={form.rule_type}
-                  onChange={e => setForm({ ...form, rule_type: e.target.value })}
-                  className="px-3 py-2 border border-gray-200 rounded-lg text-sm"
-                >
-                  {RULE_TYPES.map(t => <option key={t.value} value={t.value}>{t.label}</option>)}
-                </select>
-                <select
-                  value={form.severity}
-                  onChange={e => setForm({ ...form, severity: e.target.value })}
-                  className="px-3 py-2 border border-gray-200 rounded-lg text-sm"
-                >
-                  <option value="error">错误</option>
-                  <option value="warning">警告</option>
-                  <option value="info">提示</option>
-                </select>
-              </div>
-              <input
-                placeholder="匹配模式（正则表达式，可选）"
-                value={form.pattern}
-                onChange={e => setForm({ ...form, pattern: e.target.value })}
-                className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm font-mono"
-              />
-              <input
-                placeholder="提示消息"
-                value={form.message}
-                onChange={e => setForm({ ...form, message: e.target.value })}
-                className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm"
-              />
-            </div>
-            <div className="flex justify-end gap-3 mt-5">
-              <button onClick={() => setShowCreate(false)} className="px-4 py-2 text-sm text-gray-600 hover:bg-gray-100 rounded-lg">
-                取消
-              </button>
-              <button onClick={handleCreate} className="px-4 py-2 bg-blue-600 text-white rounded-lg text-sm hover:bg-blue-700">
-                创建
-              </button>
-            </div>
-          </div>
+      {/* Rule List */}
+      {loading ? (
+        <div className="dg-card p-8 text-center text-[var(--dg-text-muted)] text-sm">加载中…</div>
+      ) : rules.length === 0 ? (
+        <div className="dg-card p-8 text-center space-y-3">
+          <p className="text-[var(--dg-text-muted)] text-sm">
+            当前没有 {DB_TABS.find((t) => t.key === activeTab)?.label} 的审核规则
+          </p>
+          <button
+            onClick={handleSeed}
+            disabled={seeding}
+            className="px-4 py-2 text-sm rounded-lg border border-[var(--dg-border)] text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)] disabled:opacity-50"
+          >
+            点击初始化默认规则
+          </button>
+        </div>
+      ) : (
+        <div className="space-y-6">
+          {renderRuleGroup('DDL 规则', '🏗️', ddlRules)}
+          {renderRuleGroup('DML 规则', '📝', dmlRules)}
         </div>
       )}
-
-      {/* Rules Table */}
-      <div className="bg-white rounded-lg shadow-sm overflow-hidden">
-        {loading ? (
-          <div className="p-8 text-center text-gray-400">加载中...</div>
-        ) : rules.length === 0 ? (
-          <div className="p-8 text-center text-gray-400">暂无规则，点击"新建规则"添加</div>
-        ) : (
-          <table className="w-full">
-            <thead>
-              <tr className="bg-gray-50 text-left text-xs text-gray-500">
-                <th className="px-4 py-3">规则名称</th>
-                <th className="px-4 py-3">类型</th>
-                <th className="px-4 py-3">级别</th>
-                <th className="px-4 py-3">提示消息</th>
-                <th className="px-4 py-3">状态</th>
-                <th className="px-4 py-3 text-right">操作</th>
-              </tr>
-            </thead>
-            <tbody className="divide-y divide-gray-100">
-              {rules.map(rule => {
-                const typeInfo = getTypeInfo(rule.rule_type);
-                const sevInfo = getSeverityInfo(rule.severity);
-                return (
-                  <tr key={rule.id} className="hover:bg-gray-50">
-                    <td className="px-4 py-3">
-                      <div>
-                        <p className="font-medium text-sm text-gray-900">{rule.name}</p>
-                        {rule.description && <p className="text-xs text-gray-400 mt-0.5">{rule.description}</p>}
-                      </div>
-                    </td>
-                    <td className="px-4 py-3">
-                      <span className={'px-2 py-0.5 rounded text-xs ' + typeInfo.color}>{typeInfo.label}</span>
-                    </td>
-                    <td className="px-4 py-3">
-                      <span className={'px-2 py-0.5 rounded text-xs ' + sevInfo.color}>{sevInfo.label}</span>
-                    </td>
-                    <td className="px-4 py-3 text-sm text-gray-600 max-w-xs truncate">{rule.message}</td>
-                    <td className="px-4 py-3">
-                      <button
-                        onClick={() => handleToggle(rule)}
-                        className={'px-2 py-1 rounded text-xs ' + (
-                          rule.is_enabled ? 'bg-green-100 text-green-700' : 'bg-gray-100 text-gray-400'
-                        )}
-                      >
-                        {rule.is_enabled ? '启用' : '禁用'}
-                      </button>
-                    </td>
-                    <td className="px-4 py-3 text-right">
-                      <button
-                        onClick={() => handleDelete(rule.id)}
-                        className="text-xs text-red-500 hover:text-red-700"
-                      >
-                        删除
-                      </button>
-                    </td>
-                  </tr>
-                );
-              })}
-            </tbody>
-          </table>
-        )}
-      </div>
     </div>
   );
 }
diff --git a/frontend/src/pages/LdapConfigPage.tsx b/frontend/src/pages/LdapConfigPage.tsx
new file mode 100644
index 0000000..71014b6
--- /dev/null
+++ b/frontend/src/pages/LdapConfigPage.tsx
@@ -0,0 +1,335 @@
+import { useState, useEffect, useCallback } from 'react';
+import request from '@/api/request';
+import { Save, Shield, CheckCircle, XCircle } from 'lucide-react';
+
+/* ── types ── */
+interface LdapConfig {
+  ldap_host: string;
+  ldap_port: number;
+  use_ldaps: boolean;
+  admin_dn: string;
+  admin_password: string;
+  search_filter: string;
+  base_dn: string;
+  user_mapping: Record<string, string>;
+}
+
+const defaultConfig: LdapConfig = {
+  ldap_host: '',
+  ldap_port: 389,
+  use_ldaps: false,
+  admin_dn: '',
+  admin_password: '',
+  search_filter: '(objectClass=person)',
+  base_dn: '',
+  user_mapping: { username: 'uid', email: 'mail', display_name: 'cn' },
+};
+
+export default function LdapConfigPage() {
+  const [config, setConfig] = useState<LdapConfig>(defaultConfig);
+  const [loading, setLoading] = useState(false);
+  const [saving, setSaving] = useState(false);
+  const [saveMsg, setSaveMsg] = useState<{ ok: boolean; text: string } | null>(null);
+
+  /* test */
+  const [testUser, setTestUser] = useState('');
+  const [testPass, setTestPass] = useState('');
+  const [testing, setTesting] = useState(false);
+  const [testResult, setTestResult] = useState<{ success: boolean; message: string } | null>(null);
+
+  const fetchConfig = useCallback(async () => {
+    try {
+      setLoading(true);
+      const res = await request.get('/ldap-config');
+      const data = (res as any).data ?? res;
+      if (data && typeof data === 'object') {
+        setConfig({
+          ldap_host: data.ldap_host || '',
+          ldap_port: data.ldap_port || 389,
+          use_ldaps: data.use_ldaps ?? false,
+          admin_dn: data.admin_dn || '',
+          admin_password: data.admin_password || '',
+          search_filter: data.search_filter || '',
+          base_dn: data.base_dn || '',
+          user_mapping: typeof data.user_mapping === 'string'
+            ? JSON.parse(data.user_mapping)
+            : data.user_mapping || defaultConfig.user_mapping,
+        });
+      }
+    } catch {
+      /* 404 = no config yet, use defaults */
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    fetchConfig();
+  }, [fetchConfig]);
+
+  /* update helpers */
+  const updateField = <K extends keyof LdapConfig>(key: K, value: LdapConfig[K]) => {
+    setConfig(prev => ({ ...prev, [key]: value }));
+  };
+
+  const updateMapping = (key: string, value: string) => {
+    setConfig(prev => ({
+      ...prev,
+      user_mapping: { ...prev.user_mapping, [key]: value },
+    }));
+  };
+
+  /* save */
+  const handleSave = async () => {
+    try {
+      setSaving(true);
+      setSaveMsg(null);
+      await request.put('/ldap-config', config);
+      setSaveMsg({ ok: true, text: '保存成功' });
+    } catch (err: any) {
+      setSaveMsg({ ok: false, text: err.response?.data?.detail || '保存失败' });
+    } finally {
+      setSaving(false);
+      setTimeout(() => setSaveMsg(null), 3000);
+    }
+  };
+
+  /* test connection */
+  const handleTest = async () => {
+    if (!testUser.trim() || !testPass.trim()) return;
+    try {
+      setTesting(true);
+      setTestResult(null);
+      const res = await request.post('/ldap-config/test', { test_user: testUser, test_password: testPass });
+      const data = (res as any).data ?? res;
+      setTestResult({ success: data.success ?? true, message: data.message || '连接成功' });
+    } catch (err: any) {
+      setTestResult({ success: false, message: err.response?.data?.detail || '连接失败' });
+    } finally {
+      setTesting(false);
+    }
+  };
+
+  if (loading) {
+    return <div className="dg-card p-8 text-center text-[var(--dg-text-muted)] text-sm">加载中…</div>;
+  }
+
+  return (
+    <div className="space-y-5">
+      {/* Header */}
+      <div className="flex items-center justify-between">
+        <div>
+          <h1 className="text-xl font-semibold text-[var(--dg-text-primary)]">LDAP 设置</h1>
+          <p className="text-sm text-[var(--dg-text-muted)] mt-1">配置 LDAP/AD 域账号认证集成</p>
+        </div>
+        <button
+          onClick={handleSave}
+          disabled={saving}
+          className="flex items-center gap-2 px-4 py-2 text-sm font-medium rounded-lg bg-[var(--dg-blue)] text-white hover:opacity-90 transition-opacity disabled:opacity-50"
+        >
+          <Save className="w-4 h-4" /> {saving ? '保存中…' : '保存配置'}
+        </button>
+      </div>
+
+      {saveMsg && (
+        <div
+          className={`dg-card px-4 py-3 flex items-center gap-2 text-sm ${
+            saveMsg.ok ? 'text-green-400 bg-green-500/10' : 'text-red-400 bg-red-500/10'
+          }`}
+        >
+          {saveMsg.ok ? <CheckCircle className="w-4 h-4" /> : <XCircle className="w-4 h-4" />}
+          {saveMsg.text}
+        </div>
+      )}
+
+      {/* Config Form */}
+      <div className="dg-card p-5 space-y-5">
+        {/* Server */}
+        <div>
+          <h3 className="text-sm font-semibold text-[var(--dg-text-secondary)] mb-3 flex items-center gap-2">
+            <Shield className="w-4 h-4" /> LDAP 服务器
+          </h3>
+          <div className="grid grid-cols-3 gap-4">
+            <div className="col-span-2">
+              <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">LDAP 地址</label>
+              <input
+                type="text"
+                value={config.ldap_host}
+                onChange={e => updateField('ldap_host', e.target.value)}
+                className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+                placeholder="ldap.company.com"
+              />
+            </div>
+            <div>
+              <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">端口</label>
+              <input
+                type="number"
+                value={config.ldap_port}
+                onChange={e => updateField('ldap_port', parseInt(e.target.value) || 389)}
+                className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+              />
+            </div>
+          </div>
+          <div className="flex items-center gap-3 mt-3">
+            <button
+              type="button"
+              onClick={() => updateField('use_ldaps', !config.use_ldaps)}
+              className={`relative inline-flex h-5 w-9 flex-shrink-0 cursor-pointer items-center rounded-full transition-colors duration-200 ${
+                config.use_ldaps ? 'bg-[var(--dg-green)]' : 'bg-[var(--dg-bg-hover)]'
+              }`}
+            >
+              <span
+                className={`inline-block h-3.5 w-3.5 rounded-full bg-white shadow-sm transition-transform duration-200 ${
+                  config.use_ldaps ? 'translate-x-4.5' : 'translate-x-0.5'
+                }`}
+              />
+            </button>
+            <span className="text-sm text-[var(--dg-text-secondary)]">启用 LDAPS (SSL/TLS)</span>
+          </div>
+        </div>
+
+        {/* Admin */}
+        <div className="pt-4 border-t border-[var(--dg-border)]">
+          <h3 className="text-sm font-semibold text-[var(--dg-text-secondary)] mb-3">管理员账号</h3>
+          <div className="grid grid-cols-2 gap-4">
+            <div>
+              <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">管理员 DN</label>
+              <input
+                type="text"
+                value={config.admin_dn}
+                onChange={e => updateField('admin_dn', e.target.value)}
+                className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+                placeholder="cn=admin,dc=company,dc=com"
+              />
+            </div>
+            <div>
+              <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">管理员密码</label>
+              <input
+                type="password"
+                value={config.admin_password}
+                onChange={e => updateField('admin_password', e.target.value)}
+                className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+                placeholder="••••••••"
+              />
+            </div>
+          </div>
+        </div>
+
+        {/* Search */}
+        <div className="pt-4 border-t border-[var(--dg-border)]">
+          <h3 className="text-sm font-semibold text-[var(--dg-text-secondary)] mb-3">搜索配置</h3>
+          <div className="grid grid-cols-2 gap-4">
+            <div>
+              <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">Search Filter</label>
+              <input
+                type="text"
+                value={config.search_filter}
+                onChange={e => updateField('search_filter', e.target.value)}
+                className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+                placeholder="(objectClass=person)"
+              />
+            </div>
+            <div>
+              <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">Base DN</label>
+              <input
+                type="text"
+                value={config.base_dn}
+                onChange={e => updateField('base_dn', e.target.value)}
+                className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+                placeholder="ou=users,dc=company,dc=com"
+              />
+            </div>
+          </div>
+        </div>
+
+        {/* User Mapping */}
+        <div className="pt-4 border-t border-[var(--dg-border)]">
+          <h3 className="text-sm font-semibold text-[var(--dg-text-secondary)] mb-3">用户属性映射</h3>
+          <div className="grid grid-cols-3 gap-4">
+            <div>
+              <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">username 字段</label>
+              <input
+                type="text"
+                value={config.user_mapping.username || ''}
+                onChange={e => updateMapping('username', e.target.value)}
+                className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+                placeholder="uid"
+              />
+            </div>
+            <div>
+              <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">email 字段</label>
+              <input
+                type="text"
+                value={config.user_mapping.email || ''}
+                onChange={e => updateMapping('email', e.target.value)}
+                className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+                placeholder="mail"
+              />
+            </div>
+            <div>
+              <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">display_name 字段</label>
+              <input
+                type="text"
+                value={config.user_mapping.display_name || ''}
+                onChange={e => updateMapping('display_name', e.target.value)}
+                className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+                placeholder="cn"
+              />
+            </div>
+          </div>
+        </div>
+      </div>
+
+      {/* Test Connection */}
+      <div className="dg-card p-5">
+        <h3 className="text-sm font-semibold text-[var(--dg-text-secondary)] mb-3 flex items-center gap-2">
+          <Shield className="w-4 h-4" /> 测试 LDAP 连接
+        </h3>
+        <p className="text-xs text-[var(--dg-text-muted)] mb-4">使用 LDAP 账号验证配置是否正确</p>
+        <div className="grid grid-cols-3 gap-4">
+          <div>
+            <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">测试用户名</label>
+            <input
+              type="text"
+              value={testUser}
+              onChange={e => setTestUser(e.target.value)}
+              className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+              placeholder="LDAP 用户名"
+            />
+          </div>
+          <div>
+            <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">测试密码</label>
+            <input
+              type="password"
+              value={testPass}
+              onChange={e => setTestPass(e.target.value)}
+              className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+              placeholder="密码"
+            />
+          </div>
+          <div className="flex items-end gap-3">
+            <button
+              onClick={handleTest}
+              disabled={testing || !testUser.trim() || !testPass.trim()}
+              className="px-4 py-2 text-sm font-medium rounded-lg bg-blue-500/15 text-blue-400 hover:bg-blue-500/25 transition-colors disabled:opacity-50"
+            >
+              {testing ? '测试中…' : '测试连接'}
+            </button>
+          </div>
+        </div>
+        {testResult && (
+          <div
+            className={`mt-4 px-4 py-3 rounded-lg text-sm flex items-center gap-2 ${
+              testResult.success
+                ? 'bg-green-500/10 text-green-400'
+                : 'bg-red-500/10 text-red-400'
+            }`}
+          >
+            {testResult.success ? <CheckCircle className="w-4 h-4" /> : <XCircle className="w-4 h-4" />}
+            {testResult.message}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/pages/NotificationPage.tsx b/frontend/src/pages/NotificationPage.tsx
new file mode 100644
index 0000000..d67fb94
--- /dev/null
+++ b/frontend/src/pages/NotificationPage.tsx
@@ -0,0 +1,456 @@
+import { useState, useEffect, useCallback } from 'react';
+import request from '@/api/request';
+import { Plus, Trash2, Send, Bell, Mail, Settings, X } from 'lucide-react';
+
+/* ── types ── */
+type ChannelType = 'dingtalk' | 'webhook_feishu' | 'email';
+
+interface NotifChannel {
+  id: number;
+  name: string;
+  channel_type: ChannelType;
+  config: Record<string, any>;
+  is_enabled: boolean;
+}
+
+const CHANNEL_LABELS: Record<ChannelType, string> = {
+  dingtalk: '钉钉',
+  webhook_feishu: '飞书',
+  email: '邮件',
+};
+
+const CHANNEL_ICONS: Record<ChannelType, React.ElementType> = {
+  dingtalk: Bell,
+  webhook_feishu: Send,
+  email: Mail,
+};
+
+interface FormState {
+  name: string;
+  channel_type: ChannelType;
+  config: Record<string, any>;
+  is_enabled: boolean;
+}
+
+const defaultForm = (): FormState => ({
+  name: '',
+  channel_type: 'dingtalk',
+  config: { webhook_url: '' },
+  is_enabled: true,
+});
+
+const dingtalkDefault = () => ({ webhook_url: '', secret: '' });
+const feishuDefault = () => ({ webhook_url: '' });
+const emailDefault = () => ({ smtp_host: '', smtp_port: 465, smtp_user: '', smtp_password: '', from_addr: '', use_tls: true });
+
+const configDefaults: Record<ChannelType, () => Record<string, any>> = {
+  dingtalk: dingtalkDefault,
+  webhook_feishu: feishuDefault,
+  email: emailDefault,
+};
+
+export default function NotificationPage() {
+  const [channels, setChannels] = useState<NotifChannel[]>([]);
+  const [loading, setLoading] = useState(false);
+
+  /* modal */
+  const [showModal, setShowModal] = useState(false);
+  const [editingId, setEditingId] = useState<number | null>(null);
+  const [form, setForm] = useState<FormState>(defaultForm());
+  const [saving, setSaving] = useState(false);
+
+  /* test */
+  const [testingId, setTestingId] = useState<number | null>(null);
+  const [testResult, setTestResult] = useState<Record<number, { success: boolean; message: string } | null>>({});
+
+  const fetchList = useCallback(async () => {
+    try {
+      setLoading(true);
+      const res = await request.get('/notifications');
+      setChannels(Array.isArray(res.data) ? res.data : Array.isArray(res) ? res : []);
+    } catch {
+      setChannels([]);
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    fetchList();
+  }, [fetchList]);
+
+  /* ── helpers ── */
+  const openCreate = () => {
+    setEditingId(null);
+    setForm(defaultForm());
+    setShowModal(true);
+  };
+
+  const openEdit = (ch: NotifChannel) => {
+    setEditingId(ch.id);
+    setForm({ name: ch.name, channel_type: ch.channel_type, config: { ...ch.config }, is_enabled: ch.is_enabled });
+    setShowModal(true);
+  };
+
+  const handleTypeChange = (t: ChannelType) => {
+    setForm(prev => ({ ...prev, channel_type: t, config: configDefaults[t]() }));
+  };
+
+  const updateConfig = (key: string, value: any) => {
+    setForm(prev => ({ ...prev, config: { ...prev.config, [key]: value } }));
+  };
+
+  const handleSave = async () => {
+    if (!form.name.trim()) return;
+    try {
+      setSaving(true);
+      if (editingId) {
+        await request.put(`/notifications/${editingId}`, form);
+      } else {
+        await request.post('/notifications', form);
+      }
+      setShowModal(false);
+      fetchList();
+    } catch (err: any) {
+      alert(err.response?.data?.detail || '保存失败');
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  const handleToggle = async (ch: NotifChannel) => {
+    try {
+      await request.put(`/notifications/${ch.id}`, { is_enabled: !ch.is_enabled });
+      fetchList();
+    } catch {
+      /* ignore */
+    }
+  };
+
+  const handleDelete = async (id: number) => {
+    if (!confirm('确定删除此通知渠道？')) return;
+    try {
+      await request.delete(`/notifications/${id}`);
+      fetchList();
+    } catch {
+      /* ignore */
+    }
+  };
+
+  const handleTest = async (id: number) => {
+    try {
+      setTestingId(id);
+      setTestResult(prev => ({ ...prev, [id]: null }));
+      const res = await request.post(`/notifications/${id}/test`);
+      const data = (res as any).data ?? res;
+      setTestResult(prev => ({ ...prev, [id]: { success: true, message: data.message || '测试成功' } }));
+    } catch (err: any) {
+      setTestResult(prev => ({
+        ...prev,
+        [id]: { success: false, message: err.response?.data?.detail || '测试失败' },
+      }));
+    } finally {
+      setTestingId(null);
+      setTimeout(() => setTestResult(prev => ({ ...prev, [id]: null })), 5000);
+    }
+  };
+
+  /* ── config form renderer ── */
+  const renderConfigFields = () => {
+    const t = form.channel_type;
+    if (t === 'dingtalk') {
+      return (
+        <>
+          <div>
+            <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">Webhook URL <span className="text-red-400">*</span></label>
+            <input
+              type="text"
+              value={form.config.webhook_url || ''}
+              onChange={e => updateConfig('webhook_url', e.target.value)}
+              className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+              placeholder="https://oapi.dingtalk.com/robot/send?access_token=..."
+            />
+          </div>
+          <div>
+            <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">签名密钥 (Secret)</label>
+            <input
+              type="text"
+              value={form.config.secret || ''}
+              onChange={e => updateConfig('secret', e.target.value)}
+              className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+              placeholder="可选，加签密钥"
+            />
+          </div>
+        </>
+      );
+    }
+    if (t === 'webhook_feishu') {
+      return (
+        <div>
+          <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">Webhook URL <span className="text-red-400">*</span></label>
+          <input
+            type="text"
+            value={form.config.webhook_url || ''}
+            onChange={e => updateConfig('webhook_url', e.target.value)}
+            className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+            placeholder="https://open.feishu.cn/open-apis/bot/v2/hook/..."
+          />
+        </div>
+      );
+    }
+    /* email */
+    return (
+      <div className="grid grid-cols-2 gap-4">
+        <div>
+          <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">SMTP 服务器 <span className="text-red-400">*</span></label>
+          <input
+            type="text"
+            value={form.config.smtp_host || ''}
+            onChange={e => updateConfig('smtp_host', e.target.value)}
+            className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+            placeholder="smtp.example.com"
+          />
+        </div>
+        <div>
+          <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">端口</label>
+          <input
+            type="number"
+            value={form.config.smtp_port || 465}
+            onChange={e => updateConfig('smtp_port', parseInt(e.target.value) || 465)}
+            className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+          />
+        </div>
+        <div>
+          <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">SMTP 用户 <span className="text-red-400">*</span></label>
+          <input
+            type="text"
+            value={form.config.smtp_user || ''}
+            onChange={e => updateConfig('smtp_user', e.target.value)}
+            className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+            placeholder="noreply@example.com"
+          />
+        </div>
+        <div>
+          <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">SMTP 密码</label>
+          <input
+            type="password"
+            value={form.config.smtp_password || ''}
+            onChange={e => updateConfig('smtp_password', e.target.value)}
+            className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+            placeholder="••••••••"
+          />
+        </div>
+        <div>
+          <label className="text-xs text-[var(--dg-text-muted)] mb-1 block">发件地址 <span className="text-red-400">*</span></label>
+          <input
+            type="text"
+            value={form.config.from_addr || ''}
+            onChange={e => updateConfig('from_addr', e.target.value)}
+            className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+            placeholder="noreply@example.com"
+          />
+        </div>
+        <div className="flex items-center gap-3 pt-5">
+          <button
+            type="button"
+            onClick={() => updateConfig('use_tls', !form.config.use_tls)}
+            className={`relative inline-flex h-5 w-9 flex-shrink-0 cursor-pointer items-center rounded-full transition-colors duration-200 ${
+              form.config.use_tls ? 'bg-[var(--dg-green)]' : 'bg-[var(--dg-bg-hover)]'
+            }`}
+          >
+            <span
+              className={`inline-block h-3.5 w-3.5 rounded-full bg-white shadow-sm transition-transform duration-200 ${
+                form.config.use_tls ? 'translate-x-4.5' : 'translate-x-0.5'
+              }`}
+            />
+          </button>
+          <span className="text-sm text-[var(--dg-text-secondary)]">启用 TLS</span>
+        </div>
+      </div>
+    );
+  };
+
+  /* ── render ── */
+  return (
+    <div className="space-y-5">
+      {/* Header */}
+      <div className="flex items-center justify-between">
+        <div>
+          <h1 className="text-xl font-semibold text-[var(--dg-text-primary)]">消息推送</h1>
+          <p className="text-sm text-[var(--dg-text-muted)] mt-1">管理钉钉、飞书、邮件等通知渠道</p>
+        </div>
+        <button
+          onClick={openCreate}
+          className="flex items-center gap-2 px-4 py-2 text-sm font-medium rounded-lg bg-[var(--dg-blue)] text-white hover:opacity-90 transition-opacity"
+        >
+          <Plus className="w-4 h-4" /> 添加渠道
+        </button>
+      </div>
+
+      {/* List */}
+      {loading ? (
+        <div className="dg-card p-8 text-center text-[var(--dg-text-muted)] text-sm">加载中…</div>
+      ) : channels.length === 0 ? (
+        <div className="dg-card p-8 text-center text-[var(--dg-text-muted)] text-sm">暂无通知渠道，点击右上角添加</div>
+      ) : (
+        <div className="space-y-3">
+          {channels.map(ch => {
+            const Icon = CHANNEL_ICONS[ch.channel_type] || Settings;
+            const result = testResult[ch.id];
+            return (
+              <div key={ch.id} className={`dg-card px-5 py-4 flex items-center gap-4 ${!ch.is_enabled ? 'opacity-50' : ''}`}>
+                <div className={`w-10 h-10 rounded-lg flex items-center justify-center flex-shrink-0 ${ch.is_enabled ? 'bg-blue-500/15' : 'bg-[var(--dg-bg-tertiary)]'}`}>
+                  <Icon className={`w-5 h-5 ${ch.is_enabled ? 'text-blue-400' : 'text-[var(--dg-text-muted)]'}`} />
+                </div>
+                <div className="flex-1 min-w-0">
+                  <div className="flex items-center gap-2 mb-1">
+                    <h3 className="text-sm font-medium text-[var(--dg-text-primary)]">{ch.name}</h3>
+                    <span className="text-[11px] px-2 py-0.5 rounded-full bg-blue-500/15 text-blue-400">
+                      {CHANNEL_LABELS[ch.channel_type] || ch.channel_type}
+                    </span>
+                    <span className={`text-[11px] px-2 py-0.5 rounded-full ${ch.is_enabled ? 'bg-green-500/15 text-green-400' : 'bg-[var(--dg-bg-tertiary)] text-[var(--dg-text-muted)]'}`}>
+                      {ch.is_enabled ? '已启用' : '已禁用'}
+                    </span>
+                  </div>
+                  <p className="text-xs text-[var(--dg-text-muted)] truncate">
+                    {ch.channel_type === 'email'
+                      ? `${ch.config.smtp_host}:${ch.config.smtp_port} / ${ch.config.from_addr}`
+                      : ch.config.webhook_url || '未配置'}
+                  </p>
+                </div>
+                <div className="flex items-center gap-2 flex-shrink-0">
+                  <button
+                    onClick={() => handleToggle(ch)}
+                    className={`px-3 py-1.5 rounded-lg text-xs font-medium transition-colors ${
+                      ch.is_enabled
+                        ? 'bg-yellow-500/15 text-yellow-400 hover:bg-yellow-500/25'
+                        : 'bg-green-500/15 text-green-400 hover:bg-green-500/25'
+                    }`}
+                  >
+                    {ch.is_enabled ? '禁用' : '启用'}
+                  </button>
+                  <button
+                    onClick={() => handleTest(ch.id)}
+                    disabled={testingId === ch.id}
+                    className={`px-3 py-1.5 rounded-lg text-xs font-medium transition-colors ${
+                      result?.success
+                        ? 'bg-green-500/15 text-green-400'
+                        : result?.success === false
+                        ? 'bg-red-500/15 text-red-400'
+                        : 'bg-blue-500/15 text-blue-400 hover:bg-blue-500/25'
+                    } disabled:opacity-50`}
+                  >
+                    {testingId === ch.id ? '发送中…' : result?.success ? '✓ 成功' : result?.success === false ? '✗ 失败' : '测试'}
+                  </button>
+                  <button
+                    onClick={() => openEdit(ch)}
+                    className="w-8 h-8 rounded-lg flex items-center justify-center text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)] transition-colors"
+                    title="编辑"
+                  >
+                    <Settings className="w-4 h-4" />
+                  </button>
+                  <button
+                    onClick={() => handleDelete(ch.id)}
+                    className="w-8 h-8 rounded-lg flex items-center justify-center text-[var(--dg-text-secondary)] hover:bg-red-500/15 hover:text-red-400 transition-colors"
+                    title="删除"
+                  >
+                    <Trash2 className="w-4 h-4" />
+                  </button>
+                </div>
+              </div>
+            );
+          })}
+        </div>
+      )}
+
+      {/* ── Create / Edit Modal ── */}
+      {showModal && (
+        <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm" onClick={() => setShowModal(false)}>
+          <div
+            className="bg-[var(--dg-bg-secondary)] border border-[var(--dg-border)] rounded-xl p-6 max-w-2xl w-full mx-4 max-h-[90vh] overflow-y-auto"
+            onClick={e => e.stopPropagation()}
+          >
+            <div className="flex items-center justify-between mb-6">
+              <h3 className="text-xl font-semibold text-[var(--dg-text-primary)]">{editingId ? '编辑渠道' : '添加渠道'}</h3>
+              <button onClick={() => setShowModal(false)} className="w-8 h-8 rounded-lg flex items-center justify-center hover:bg-[var(--dg-bg-hover)]">
+                <X className="w-5 h-5" />
+              </button>
+            </div>
+
+            <div className="space-y-4">
+              <div>
+                <label className="text-xs text-[var(--dg-text-muted)] mb-1.5 block">渠道名称 <span className="text-red-400">*</span></label>
+                <input
+                  type="text"
+                  value={form.name}
+                  onChange={e => setForm(prev => ({ ...prev, name: e.target.value }))}
+                  className="w-full px-3 py-2 bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-primary)] focus:outline-none focus:border-[var(--dg-blue)]"
+                  placeholder="例如：运维群钉钉机器人"
+                />
+              </div>
+
+              {!editingId && (
+                <div>
+                  <label className="text-xs text-[var(--dg-text-muted)] mb-1.5 block">渠道类型</label>
+                  <div className="dg-card p-1.5 flex gap-1">
+                    {(Object.entries(CHANNEL_LABELS) as [ChannelType, string][]).map(([key, label]) => (
+                      <button
+                        key={key}
+                        onClick={() => handleTypeChange(key)}
+                        className={`flex-1 px-4 py-2 rounded-lg text-sm font-medium transition-colors ${
+                          form.channel_type === key
+                            ? 'bg-[var(--dg-blue)] text-white'
+                            : 'text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)]'
+                        }`}
+                      >
+                        {label}
+                      </button>
+                    ))}
+                  </div>
+                </div>
+              )}
+
+              <div className="pt-2 border-t border-[var(--dg-border)]">
+                <h4 className="text-xs font-semibold text-[var(--dg-text-secondary)] mb-3">渠道配置</h4>
+                {renderConfigFields()}
+              </div>
+
+              <div className="flex items-center gap-3 pt-2 border-t border-[var(--dg-border)]">
+                <button
+                  type="button"
+                  onClick={() => setForm(prev => ({ ...prev, is_enabled: !prev.is_enabled }))}
+                  className={`relative inline-flex h-5 w-9 flex-shrink-0 cursor-pointer items-center rounded-full transition-colors duration-200 ${
+                    form.is_enabled ? 'bg-[var(--dg-green)]' : 'bg-[var(--dg-bg-hover)]'
+                  }`}
+                >
+                  <span
+                    className={`inline-block h-3.5 w-3.5 rounded-full bg-white shadow-sm transition-transform duration-200 ${
+                      form.is_enabled ? 'translate-x-4.5' : 'translate-x-0.5'
+                    }`}
+                  />
+                </button>
+                <span className="text-sm text-[var(--dg-text-secondary)]">启用此渠道</span>
+              </div>
+            </div>
+
+            <div className="flex justify-end gap-3 mt-6 pt-4 border-t border-[var(--dg-border)]">
+              <button
+                onClick={() => setShowModal(false)}
+                className="px-5 py-2.5 bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] rounded-lg text-sm text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)] transition-colors"
+              >
+                取消
+              </button>
+              <button
+                onClick={handleSave}
+                disabled={!form.name.trim() || saving}
+                className="flex items-center gap-2 px-5 py-2.5 bg-[var(--dg-blue)] rounded-lg text-sm font-medium text-white hover:opacity-90 transition-opacity disabled:opacity-50 disabled:cursor-not-allowed"
+              >
+                {saving ? '保存中…' : editingId ? '保存修改' : '添加'}
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/frontend/src/pages/SettingsPage.tsx b/frontend/src/pages/SettingsPage.tsx
new file mode 100644
index 0000000..a9cae99
--- /dev/null
+++ b/frontend/src/pages/SettingsPage.tsx
@@ -0,0 +1,53 @@
+import { useState } from 'react';
+import AnnouncementPage from './AnnouncementPage';
+import NotificationPage from './NotificationPage';
+import LdapConfigPage from './LdapConfigPage';
+import AuditRulesPage from './AuditRulesPage';
+
+const tabs = [
+  { id: 'rules', label: '审核规则', icon: '🛡️' },
+  { id: 'announcement', label: '公告管理', icon: '📢' },
+  { id: 'notification', label: '消息推送', icon: '🔔' },
+  { id: 'ldap', label: 'LDAP', icon: '🔐' },
+] as const;
+
+type TabId = typeof tabs[number]['id'];
+
+export default function SettingsPage() {
+  const [activeTab, setActiveTab] = useState<TabId>('rules');
+
+  return (
+    <div className="space-y-5">
+      <div>
+        <h1 className="text-xl font-semibold">系统设置</h1>
+        <p className="text-sm text-[var(--dg-text-muted)] mt-1">管理平台配置、审核规则、消息推送和 LDAP 认证</p>
+      </div>
+
+      {/* Tab 导航 */}
+      <div className="flex gap-1 p-1 bg-[var(--dg-bg-tertiary)] rounded-xl w-fit">
+        {tabs.map(tab => (
+          <button
+            key={tab.id}
+            onClick={() => setActiveTab(tab.id)}
+            className={`flex items-center gap-2 px-4 py-2 rounded-lg text-sm font-medium transition-all ${
+              activeTab === tab.id
+                ? 'bg-[var(--dg-bg-primary)] text-[var(--dg-text-primary)] shadow-sm'
+                : 'text-[var(--dg-text-muted)] hover:text-[var(--dg-text-secondary)]'
+            }`}
+          >
+            <span>{tab.icon}</span>
+            {tab.label}
+          </button>
+        ))}
+      </div>
+
+      {/* 内容区 */}
+      <div>
+        {activeTab === 'rules' && <AuditRulesPage />}
+        {activeTab === 'announcement' && <AnnouncementPage />}
+        {activeTab === 'notification' && <NotificationPage />}
+        {activeTab === 'ldap' && <LdapConfigPage />}
+      </div>
+    </div>
+  );
+}