diff --git a/astrbot/core/core_lifecycle.py b/astrbot/core/core_lifecycle.py
index 2a6ac4273..17fd52138 100644
--- a/astrbot/core/core_lifecycle.py
+++ b/astrbot/core/core_lifecycle.py
@@ -22,6 +22,7 @@ from astrbot.core.config.default import VERSION
 from astrbot.core.conversation_mgr import ConversationManager
 from astrbot.core.db import BaseDatabase
 from astrbot.core.db.migration.migra_45_to_46 import migrate_45_to_46
+from astrbot.core.db.migration.migra_webchat_session import migrate_webchat_session
 from astrbot.core.knowledge_base.kb_mgr import KnowledgeBaseManager
 from astrbot.core.persona_mgr import PersonaManager
 from astrbot.core.pipeline.scheduler import PipelineContext, PipelineScheduler
@@ -103,6 +104,13 @@ class AstrBotCoreLifecycle:
             logger.error(f"Migration from version 4.5 to 4.6 failed: {e!s}")
             logger.error(traceback.format_exc())
 
+        # migration for webchat session
+        try:
+            await migrate_webchat_session(self.db)
+        except Exception as e:
+            logger.error(f"Migration for webchat session failed: {e!s}")
+            logger.error(traceback.format_exc())
+
         # 初始化事件队列
         self.event_queue = Queue()
 
diff --git a/astrbot/core/db/__init__.py b/astrbot/core/db/__init__.py
index c62e49289..2af0428d0 100644
--- a/astrbot/core/db/__init__.py
+++ b/astrbot/core/db/__init__.py
@@ -13,6 +13,7 @@ from astrbot.core.db.po import (
     ConversationV2,
     Persona,
     PlatformMessageHistory,
+    PlatformSession,
     PlatformStat,
     Preference,
     Stats,
@@ -183,7 +184,7 @@ class BaseDatabase(abc.ABC):
         user_id: str,
         offset_sec: int = 86400,
     ) -> None:
-        """Delete platform message history records older than the specified offset."""
+        """Delete platform message history records newer than the specified offset."""
         ...
 
     @abc.abstractmethod
@@ -313,3 +314,51 @@ class BaseDatabase(abc.ABC):
     ) -> tuple[list[dict], int]:
         """Get paginated session conversations with joined conversation and persona details, support search and platform filter."""
         ...
+
+    # ====
+    # Platform Session Management
+    # ====
+
+    @abc.abstractmethod
+    async def create_platform_session(
+        self,
+        creator: str,
+        platform_id: str = "webchat",
+        session_id: str | None = None,
+        display_name: str | None = None,
+        is_group: int = 0,
+    ) -> PlatformSession:
+        """Create a new Platform session."""
+        ...
+
+    @abc.abstractmethod
+    async def get_platform_session_by_id(
+        self, session_id: str
+    ) -> PlatformSession | None:
+        """Get a Platform session by its ID."""
+        ...
+
+    @abc.abstractmethod
+    async def get_platform_sessions_by_creator(
+        self,
+        creator: str,
+        platform_id: str | None = None,
+        page: int = 1,
+        page_size: int = 20,
+    ) -> list[PlatformSession]:
+        """Get all Platform sessions for a specific creator (username) and optionally platform."""
+        ...
+
+    @abc.abstractmethod
+    async def update_platform_session(
+        self,
+        session_id: str,
+        display_name: str | None = None,
+    ) -> None:
+        """Update a Platform session's updated_at timestamp and optionally display_name."""
+        ...
+
+    @abc.abstractmethod
+    async def delete_platform_session(self, session_id: str) -> None:
+        """Delete a Platform session by its ID."""
+        ...
diff --git a/astrbot/core/db/migration/migra_webchat_session.py b/astrbot/core/db/migration/migra_webchat_session.py
new file mode 100644
index 000000000..6cb483464
--- /dev/null
+++ b/astrbot/core/db/migration/migra_webchat_session.py
@@ -0,0 +1,131 @@
+"""Migration script for WebChat sessions.
+
+This migration creates PlatformSession from existing platform_message_history records.
+
+Changes:
+- Creates platform_sessions table
+- Adds platform_id field (default: 'webchat')
+- Adds display_name field
+- Session_id format: {platform_id}_{uuid}
+"""
+
+from sqlalchemy import func, select
+from sqlmodel import col
+
+from astrbot.api import logger, sp
+from astrbot.core.db import BaseDatabase
+from astrbot.core.db.po import ConversationV2, PlatformMessageHistory, PlatformSession
+
+
+async def migrate_webchat_session(db_helper: BaseDatabase):
+    """Create PlatformSession records from platform_message_history.
+
+    This migration extracts all unique user_ids from platform_message_history
+    where platform_id='webchat' and creates corresponding PlatformSession records.
+    """
+    # 检查是否已经完成迁移
+    migration_done = await db_helper.get_preference(
+        "global", "global", "migration_done_webchat_session"
+    )
+    if migration_done:
+        return
+
+    logger.info("开始执行数据库迁移（WebChat 会话迁移）...")
+
+    try:
+        async with db_helper.get_db() as session:
+            # 从 platform_message_history 创建 PlatformSession
+            query = (
+                select(
+                    col(PlatformMessageHistory.user_id),
+                    col(PlatformMessageHistory.sender_name),
+                    func.min(PlatformMessageHistory.created_at).label("earliest"),
+                    func.max(PlatformMessageHistory.updated_at).label("latest"),
+                )
+                .where(col(PlatformMessageHistory.platform_id) == "webchat")
+                .where(col(PlatformMessageHistory.sender_id) == "astrbot")
+                .group_by(col(PlatformMessageHistory.user_id))
+            )
+
+            result = await session.execute(query)
+            webchat_users = result.all()
+
+            if not webchat_users:
+                logger.info("没有找到需要迁移的 WebChat 数据")
+                await sp.put_async(
+                    "global", "global", "migration_done_webchat_session", True
+                )
+                return
+
+            logger.info(f"找到 {len(webchat_users)} 个 WebChat 会话需要迁移")
+
+            # 检查已存在的会话
+            existing_query = select(col(PlatformSession.session_id))
+            existing_result = await session.execute(existing_query)
+            existing_session_ids = {row[0] for row in existing_result.fetchall()}
+
+            # 查询 Conversations 表中的 title，用于设置 display_name
+            # 对于每个 user_id，对应的 conversation user_id 格式为: webchat:FriendMessage:webchat!astrbot!{user_id}
+            user_ids_to_query = [
+                f"webchat:FriendMessage:webchat!astrbot!{user_id}"
+                for user_id, _, _, _ in webchat_users
+            ]
+            conv_query = select(
+                col(ConversationV2.user_id), col(ConversationV2.title)
+            ).where(col(ConversationV2.user_id).in_(user_ids_to_query))
+            conv_result = await session.execute(conv_query)
+            # 创建 user_id -> title 的映射字典
+            title_map = {
+                user_id.replace("webchat:FriendMessage:webchat!astrbot!", ""): title
+                for user_id, title in conv_result.fetchall()
+            }
+
+            # 批量创建 PlatformSession 记录
+            sessions_to_add = []
+            skipped_count = 0
+
+            for user_id, sender_name, created_at, updated_at in webchat_users:
+                # user_id 就是 webchat_conv_id (session_id)
+                session_id = user_id
+
+                # sender_name 通常是 username，但可能为 None
+                creator = sender_name if sender_name else "guest"
+
+                # 检查是否已经存在该会话
+                if session_id in existing_session_ids:
+                    logger.debug(f"会话 {session_id} 已存在，跳过")
+                    skipped_count += 1
+                    continue
+
+                # 从 Conversations 表中获取 display_name
+                display_name = title_map.get(user_id)
+
+                # 创建新的 PlatformSession（保留原有的时间戳）
+                new_session = PlatformSession(
+                    session_id=session_id,
+                    platform_id="webchat",
+                    creator=creator,
+                    is_group=0,
+                    created_at=created_at,
+                    updated_at=updated_at,
+                    display_name=display_name,
+                )
+                sessions_to_add.append(new_session)
+
+            # 批量插入
+            if sessions_to_add:
+                session.add_all(sessions_to_add)
+                await session.commit()
+
+                logger.info(
+                    f"WebChat 会话迁移完成！成功迁移: {len(sessions_to_add)}, 跳过: {skipped_count}",
+                )
+            else:
+                logger.info("没有新会话需要迁移")
+
+        # 标记迁移完成
+        await sp.put_async("global", "global", "migration_done_webchat_session", True)
+
+    except Exception as e:
+        logger.error(f"迁移过程中发生错误: {e}", exc_info=True)
+        raise
diff --git a/astrbot/core/db/po.py b/astrbot/core/db/po.py
index 5cf25ec13..d6621d072 100644
--- a/astrbot/core/db/po.py
+++ b/astrbot/core/db/po.py
@@ -155,6 +155,48 @@ class PlatformMessageHistory(SQLModel, table=True):
     )
 
 
+class PlatformSession(SQLModel, table=True):
+    """Platform session table for managing user sessions across different platforms.
+
+    A session represents a chat window for a specific user on a specific platform.
+    Each session can have multiple conversations (对话) associated with it.
+    """
+
+    __tablename__ = "platform_sessions"  # type: ignore
+
+    inner_id: int | None = Field(
+        primary_key=True,
+        sa_column_kwargs={"autoincrement": True},
+        default=None,
+    )
+    session_id: str = Field(
+        max_length=100,
+        nullable=False,
+        unique=True,
+        default_factory=lambda: f"webchat_{uuid.uuid4()}",
+    )
+    platform_id: str = Field(default="webchat", nullable=False)
+    """Platform identifier (e.g., 'webchat', 'qq', 'discord')"""
+    creator: str = Field(nullable=False)
+    """Username of the session creator"""
+    display_name: str | None = Field(default=None, max_length=255)
+    """Display name for the session"""
+    is_group: int = Field(default=0, nullable=False)
+    """0 for private chat, 1 for group chat (not implemented yet)"""
+    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
+    updated_at: datetime = Field(
+        default_factory=lambda: datetime.now(timezone.utc),
+        sa_column_kwargs={"onupdate": datetime.now(timezone.utc)},
+    )
+
+    __table_args__ = (
+        UniqueConstraint(
+            "session_id",
+            name="uix_platform_session_id",
+        ),
+    )
+
+
 class Attachment(SQLModel, table=True):
     """This class represents attachments for messages in AstrBot.
 
diff --git a/astrbot/core/db/sqlite.py b/astrbot/core/db/sqlite.py
index 457a4ab3f..194618612 100644
--- a/astrbot/core/db/sqlite.py
+++ b/astrbot/core/db/sqlite.py
@@ -1,7 +1,7 @@
 import asyncio
 import threading
 import typing as T
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlmodel import col, delete, desc, func, or_, select, text, update
@@ -12,6 +12,7 @@ from astrbot.core.db.po import (
     ConversationV2,
     Persona,
     PlatformMessageHistory,
+    PlatformSession,
     PlatformStat,
     Preference,
     SQLModel,
@@ -412,7 +413,7 @@ class SQLiteDatabase(BaseDatabase):
         user_id,
         offset_sec=86400,
     ):
-        """Delete platform message history records older than the specified offset."""
+        """Delete platform message history records newer than the specified offset."""
         async with self.get_db() as session:
             session: AsyncSession
             async with session.begin():
@@ -422,7 +423,7 @@ class SQLiteDatabase(BaseDatabase):
                     delete(PlatformMessageHistory).where(
                         col(PlatformMessageHistory.platform_id) == platform_id,
                         col(PlatformMessageHistory.user_id) == user_id,
-                        col(PlatformMessageHistory.created_at) < cutoff_time,
+                        col(PlatformMessageHistory.created_at) >= cutoff_time,
                     ),
                 )
 
@@ -709,3 +710,101 @@ class SQLiteDatabase(BaseDatabase):
         t.start()
         t.join()
         return result
+
+    # ====
+    # Platform Session Management
+    # ====
+
+    async def create_platform_session(
+        self,
+        creator: str,
+        platform_id: str = "webchat",
+        session_id: str | None = None,
+        display_name: str | None = None,
+        is_group: int = 0,
+    ) -> PlatformSession:
+        """Create a new Platform session."""
+        kwargs = {}
+        if session_id:
+            kwargs["session_id"] = session_id
+
+        async with self.get_db() as session:
+            session: AsyncSession
+            async with session.begin():
+                new_session = PlatformSession(
+                    creator=creator,
+                    platform_id=platform_id,
+                    display_name=display_name,
+                    is_group=is_group,
+                    **kwargs,
+                )
+                session.add(new_session)
+                await session.flush()
+                await session.refresh(new_session)
+                return new_session
+
+    async def get_platform_session_by_id(
+        self, session_id: str
+    ) -> PlatformSession | None:
+        """Get a Platform session by its ID."""
+        async with self.get_db() as session:
+            session: AsyncSession
+            query = select(PlatformSession).where(
+                PlatformSession.session_id == session_id,
+            )
+            result = await session.execute(query)
+            return result.scalar_one_or_none()
+
+    async def get_platform_sessions_by_creator(
+        self,
+        creator: str,
+        platform_id: str | None = None,
+        page: int = 1,
+        page_size: int = 20,
+    ) -> list[PlatformSession]:
+        """Get all Platform sessions for a specific creator (username) and optionally platform."""
+        async with self.get_db() as session:
+            session: AsyncSession
+            offset = (page - 1) * page_size
+            query = select(PlatformSession).where(PlatformSession.creator == creator)
+
+            if platform_id:
+                query = query.where(PlatformSession.platform_id == platform_id)
+
+            query = (
+                query.order_by(desc(PlatformSession.updated_at))
+                .offset(offset)
+                .limit(page_size)
+            )
+            result = await session.execute(query)
+            return list(result.scalars().all())
+
+    async def update_platform_session(
+        self,
+        session_id: str,
+        display_name: str | None = None,
+    ) -> None:
+        """Update a Platform session's updated_at timestamp and optionally display_name."""
+        async with self.get_db() as session:
+            session: AsyncSession
+            async with session.begin():
+                values: dict[str, T.Any] = {"updated_at": datetime.now(timezone.utc)}
+                if display_name is not None:
+                    values["display_name"] = display_name
+
+                await session.execute(
+                    update(PlatformSession)
+                    .where(col(PlatformSession.session_id == session_id))
+                    .values(**values),
+                )
+
+    async def delete_platform_session(self, session_id: str) -> None:
+        """Delete a Platform session by its ID."""
+        async with self.get_db() as session:
+            session: AsyncSession
+            async with session.begin():
+                await session.execute(
+                    delete(PlatformSession).where(
+                        col(PlatformSession.session_id == session_id),
+                    ),
+                )
diff --git a/astrbot/dashboard/routes/chat.py b/astrbot/dashboard/routes/chat.py
index 56946550a..1ad789563 100644
--- a/astrbot/dashboard/routes/chat.py
+++ b/astrbot/dashboard/routes/chat.py
@@ -10,7 +10,6 @@ from quart import g, make_response, request
 from astrbot.core import logger
 from astrbot.core.core_lifecycle import AstrBotCoreLifecycle
 from astrbot.core.db import BaseDatabase
-from astrbot.core.platform.astr_message_event import MessageSession
 from astrbot.core.platform.sources.webchat.webchat_queue_mgr import webchat_queue_mgr
 from astrbot.core.utils.astrbot_path import get_astrbot_data_path
 
@@ -36,11 +35,14 @@ class ChatRoute(Route):
         super().__init__(context)
         self.routes = {
             "/chat/send": ("POST", self.chat),
-            "/chat/new_conversation": ("GET", self.new_conversation),
-            "/chat/conversations": ("GET", self.get_conversations),
-            "/chat/get_conversation": ("GET", self.get_conversation),
-            "/chat/delete_conversation": ("GET", self.delete_conversation),
-            "/chat/rename_conversation": ("POST", self.rename_conversation),
+            "/chat/new_session": ("GET", self.new_session),
+            "/chat/sessions": ("GET", self.get_sessions),
+            "/chat/get_session": ("GET", self.get_session),
+            "/chat/delete_session": ("GET", self.delete_webchat_session),
+            "/chat/update_session_display_name": (
+                "POST",
+                self.update_session_display_name,
+            ),
             "/chat/get_file": ("GET", self.get_file),
             "/chat/post_image": ("POST", self.post_image),
             "/chat/post_file": ("POST", self.post_file),
@@ -53,6 +55,7 @@ class ChatRoute(Route):
         self.supported_imgs = ["jpg", "jpeg", "png", "gif", "webp"]
         self.conv_mgr = core_lifecycle.conversation_manager
         self.platform_history_mgr = core_lifecycle.platform_message_history_manager
+        self.db = db
 
         self.running_convs: dict[str, bool] = {}
 
@@ -116,11 +119,14 @@ class ChatRoute(Route):
         if "message" not in post_data and "image_url" not in post_data:
             return Response().error("Missing key: message or image_url").__dict__
 
-        if "conversation_id" not in post_data:
-            return Response().error("Missing key: conversation_id").__dict__
+        if "session_id" not in post_data and "conversation_id" not in post_data:
+            return (
+                Response().error("Missing key: session_id or conversation_id").__dict__
+            )
 
         message = post_data["message"]
-        conversation_id = post_data["conversation_id"]
+        # conversation_id = post_data["conversation_id"]
+        session_id = post_data.get("session_id", post_data.get("conversation_id"))
         image_url = post_data.get("image_url")
         audio_url = post_data.get("audio_url")
         selected_provider = post_data.get("selected_provider")
@@ -133,11 +139,11 @@ class ChatRoute(Route):
                 .error("Message and image_url and audio_url are empty")
                 .__dict__
             )
-        if not conversation_id:
-            return Response().error("conversation_id is empty").__dict__
+        if not session_id:
+            return Response().error("session_id is empty").__dict__
 
         # 追加用户消息
-        webchat_conv_id = await self._get_webchat_conv_id_from_conv_id(conversation_id)
+        webchat_conv_id = session_id
 
         # 获取会话特定的队列
         back_queue = webchat_queue_mgr.get_or_create_back_queue(webchat_conv_id)
@@ -245,88 +251,110 @@ class ChatRoute(Route):
         response.timeout = None  # fix SSE auto disconnect issue
         return response
 
-    async def _get_webchat_conv_id_from_conv_id(self, conversation_id: str) -> str:
-        """从对话 ID 中提取 WebChat 会话 ID
-
-        NOTE: 关于这里为什么要单独做一个 WebChat 的 Conversation ID 出来，这个是为了向前兼容。
-        """
-        conversation = await self.conv_mgr.get_conversation(
-            unified_msg_origin="webchat",
-            conversation_id=conversation_id,
-        )
-        if not conversation:
-            raise ValueError(f"Conversation with ID {conversation_id} not found.")
-        conv_user_id = conversation.user_id
-        webchat_session_id = MessageSession.from_str(conv_user_id).session_id
-        if "!" not in webchat_session_id:
-            raise ValueError(f"Invalid conv user ID: {conv_user_id}")
-        return webchat_session_id.split("!")[-1]
-
-    async def delete_conversation(self):
-        conversation_id = request.args.get("conversation_id")
-        if not conversation_id:
-            return Response().error("Missing key: conversation_id").__dict__
+    async def delete_webchat_session(self):
+        """Delete a Platform session and all its related data."""
+        session_id = request.args.get("session_id")
+        if not session_id:
+            return Response().error("Missing key: session_id").__dict__
         username = g.get("username", "guest")
 
-        # Clean up queues when deleting conversation
-        webchat_queue_mgr.remove_queues(conversation_id)
-        webchat_conv_id = await self._get_webchat_conv_id_from_conv_id(conversation_id)
-        await self.conv_mgr.delete_conversation(
-            unified_msg_origin=f"webchat:FriendMessage:webchat!{username}!{webchat_conv_id}",
-            conversation_id=conversation_id,
-        )
+        # 验证会话是否存在且属于当前用户
+        session = await self.db.get_platform_session_by_id(session_id)
+        if not session:
+            return Response().error(f"Session {session_id} not found").__dict__
+        if session.creator != username:
+            return Response().error("Permission denied").__dict__
+
+        # 删除该会话下的所有对话
+        unified_msg_origin = f"{session.platform_id}:FriendMessage:{session.platform_id}!{username}!{session_id}"
+        await self.conv_mgr.delete_conversations_by_user_id(unified_msg_origin)
+
+        # 删除消息历史
         await self.platform_history_mgr.delete(
-            platform_id="webchat",
-            user_id=webchat_conv_id,
+            platform_id=session.platform_id,
+            user_id=session_id,
             offset_sec=99999999,
         )
+
+        # 清理队列（仅对 webchat）
+        if session.platform_id == "webchat":
+            webchat_queue_mgr.remove_queues(session_id)
+
+        # 删除会话
+        await self.db.delete_platform_session(session_id)
+
         return Response().ok().__dict__
 
-    async def new_conversation(self):
+    async def new_session(self):
+        """Create a new Platform session (default: webchat)."""
         username = g.get("username", "guest")
-        webchat_conv_id = str(uuid.uuid4())
-        conv_id = await self.conv_mgr.new_conversation(
-            unified_msg_origin=f"webchat:FriendMessage:webchat!{username}!{webchat_conv_id}",
-            platform_id="webchat",
-            content=[],
+
+        # 获取可选的 platform_id 参数，默认为 webchat
+        platform_id = request.args.get("platform_id", "webchat")
+
+        # 创建新会话
+        session = await self.db.create_platform_session(
+            creator=username,
+            platform_id=platform_id,
+            is_group=0,
         )
-        return Response().ok(data={"conversation_id": conv_id}).__dict__
 
-    async def rename_conversation(self):
-        post_data = await request.json
-        if "conversation_id" not in post_data or "title" not in post_data:
-            return Response().error("Missing key: conversation_id or title").__dict__
-
-        conversation_id = post_data["conversation_id"]
-        title = post_data["title"]
-
-        await self.conv_mgr.update_conversation(
-            unified_msg_origin="webchat",  # fake
-            conversation_id=conversation_id,
-            title=title,
+        return (
+            Response()
+            .ok(
+                data={
+                    "session_id": session.session_id,
+                    "platform_id": session.platform_id,
+                }
+            )
+            .__dict__
         )
-        return Response().ok(message="重命名成功！").__dict__
 
-    async def get_conversations(self):
-        conversations = await self.conv_mgr.get_conversations(platform_id="webchat")
-        # remove content
-        conversations_ = []
-        for conv in conversations:
-            conv.history = None
-            conversations_.append(conv)
-        return Response().ok(data=conversations_).__dict__
+    async def get_sessions(self):
+        """Get all Platform sessions for the current user."""
+        username = g.get("username", "guest")
 
-    async def get_conversation(self):
-        conversation_id = request.args.get("conversation_id")
-        if not conversation_id:
-            return Response().error("Missing key: conversation_id").__dict__
+        # 获取可选的 platform_id 参数
+        platform_id = request.args.get("platform_id")
 
-        webchat_conv_id = await self._get_webchat_conv_id_from_conv_id(conversation_id)
+        sessions = await self.db.get_platform_sessions_by_creator(
+            creator=username,
+            platform_id=platform_id,
+            page=1,
+            page_size=100,  # 暂时返回前100个
+        )
 
-        # Get platform message history
+        # 转换为字典格式，并添加额外信息
+        sessions_data = []
+        for session in sessions:
+            sessions_data.append(
+                {
+                    "session_id": session.session_id,
+                    "platform_id": session.platform_id,
+                    "creator": session.creator,
+                    "display_name": session.display_name,
+                    "is_group": session.is_group,
+                    "created_at": session.created_at.astimezone().isoformat(),
+                    "updated_at": session.updated_at.astimezone().isoformat(),
+                }
+            )
+
+        return Response().ok(data=sessions_data).__dict__
+
+    async def get_session(self):
+        """Get session information and message history by session_id."""
+        session_id = request.args.get("session_id")
+        if not session_id:
+            return Response().error("Missing key: session_id").__dict__
+
+        # 获取会话信息以确定 platform_id
+        session = await self.db.get_platform_session_by_id(session_id)
+        platform_id = session.platform_id if session else "webchat"
+
+        # Get platform message history using session_id
         history_ls = await self.platform_history_mgr.get(
-            platform_id="webchat",
-            user_id=webchat_conv_id,
+            platform_id=platform_id,
+            user_id=session_id,
             page=1,
             page_size=1000,
         )
@@ -338,8 +366,37 @@ class ChatRoute(Route):
             .ok(
                 data={
                     "history": history_res,
-                    "is_running": self.running_convs.get(webchat_conv_id, False),
+                    "is_running": self.running_convs.get(session_id, False),
                 },
             )
             .__dict__
         )
+
+    async def update_session_display_name(self):
+        """Update a Platform session's display name."""
+        post_data = await request.json
+
+        session_id = post_data.get("session_id")
+        display_name = post_data.get("display_name")
+
+        if not session_id:
+            return Response().error("Missing key: session_id").__dict__
+        if display_name is None:
+            return Response().error("Missing key: display_name").__dict__
+
+        username = g.get("username", "guest")
+
+        # 验证会话是否存在且属于当前用户
+        session = await self.db.get_platform_session_by_id(session_id)
+        if not session:
+            return Response().error(f"Session {session_id} not found").__dict__
+        if session.creator != username:
+            return Response().error("Permission denied").__dict__
+
+        # 更新 display_name
+        await self.db.update_platform_session(
+            session_id=session_id,
+            display_name=display_name,
+        )
+
+        return Response().ok().__dict__
diff --git a/dashboard/src/components/chat/Chat.vue b/dashboard/src/components/chat/Chat.vue
index bb3418d67..09acd1b7e 100644
--- a/dashboard/src/components/chat/Chat.vue
+++ b/dashboard/src/components/chat/Chat.vue
@@ -6,9 +6,9 @@
             
             <div class="chat-layout">
                 <ConversationSidebar
-                    :conversations="conversations"
-                    :selectedConversations="selectedConversations"
-                    :currCid="currCid"
+                    :sessions="sessions"
+                    :selectedSessions="selectedSessions"
+                    :currSessionId="currSessionId"
                     :isDark="isDark"
                     :chatboxMode="chatboxMode"
                     :isMobile="isMobile"
@@ -40,7 +40,7 @@
                             <v-tooltip :text="tm('actions.fullscreen')" v-if="!chatboxMode">
                                 <template v-slot:activator="{ props }">
                                     <v-icon v-bind="props"
-                                        @click="router.push(currCid ? `/chatbox/${currCid}` : '/chatbox')"
+                                        @click="router.push(currSessionId ? `/chatbox/${currSessionId}` : '/chatbox')"
                                         class="fullscreen-icon">mdi-fullscreen</v-icon>
                                 </template>
                             </v-tooltip>
@@ -62,7 +62,7 @@
                             <!-- router 推送到 /chat -->
                             <v-tooltip :text="tm('actions.exitFullscreen')" v-if="chatboxMode">
                                 <template v-slot:activator="{ props }">
-                                    <v-icon v-bind="props" @click="router.push(currCid ? `/chat/${currCid}` : '/chat')"
+                                    <v-icon v-bind="props" @click="router.push(currSessionId ? `/chat/${currSessionId}` : '/chat')"
                                         class="fullscreen-icon">mdi-fullscreen-exit</v-icon>
                                 </template>
                             </v-tooltip>
@@ -142,7 +142,7 @@ import LanguageSwitcher from '@/components/shared/LanguageSwitcher.vue';
 import MessageList from '@/components/chat/MessageList.vue';
 import ConversationSidebar from '@/components/chat/ConversationSidebar.vue';
 import ChatInput from '@/components/chat/ChatInput.vue';
-import { useConversations } from '@/composables/useConversations';
+import { useSessions } from '@/composables/useSessions';
 import { useMessages } from '@/composables/useMessages';
 import { useMediaHandling } from '@/composables/useMediaHandling';
 import { useRecording } from '@/composables/useRecording';
@@ -169,22 +169,22 @@ const previewImageUrl = ref('');
 
 // 使用 composables
 const {
-    conversations,
-    selectedConversations,
-    currCid,
-    pendingCid,
+    sessions,
+    selectedSessions,
+    currSessionId,
+    pendingSessionId,
     editTitleDialog,
     editingTitle,
-    editingCid,
-    getCurrentConversation,
-    getConversations,
-    newConversation,
-    deleteConversation: deleteConv,
+    editingSessionId,
+    getCurrentSession,
+    getSessions,
+    newSession,
+    deleteSession: deleteSessionFn,
     showEditTitleDialog,
     saveTitle,
-    updateConversationTitle,
+    updateSessionTitle,
     newChat
-} = useConversations(props.chatboxMode);
+} = useSessions(props.chatboxMode);
 
 const {
     stagedImagesName,
@@ -206,10 +206,10 @@ const {
     isStreaming,
     isConvRunning,
     enableStreaming,
-    getConversationMessages: getConvMessages,
+    getSessionMessages: getSessionMsg,
     sendMessage: sendMsg,
     toggleStreaming
-} = useMessages(currCid, getMediaFile, updateConversationTitle, getConversations);
+} = useMessages(currSessionId, getMediaFile, updateSessionTitle, getSessions);
 
 // 组件引用
 const messageList = ref<InstanceType<typeof MessageList> | null>(null);
@@ -248,13 +248,13 @@ function openImagePreview(imageUrl: string) {
     imagePreviewDialog.value = true;
 }
 
-async function handleSelectConversation(cids: string[]) {
-    if (!cids[0]) return;
+async function handleSelectConversation(sessionIds: string[]) {
+    if (!sessionIds[0]) return;
 
     // 更新 URL
     const basePath = props.chatboxMode ? '/chatbox' : '/chat';
-    if (route.path !== `${basePath}/${cids[0]}`) {
-        router.push(`${basePath}/${cids[0]}`);
+    if (route.path !== `${basePath}/${sessionIds[0]}`) {
+        router.push(`${basePath}/${sessionIds[0]}`);
         return;
     }
 
@@ -263,10 +263,10 @@ async function handleSelectConversation(cids: string[]) {
         closeMobileSidebar();
     }
 
-    currCid.value = cids[0];
-    selectedConversations.value = [cids[0]];
+    currSessionId.value = sessionIds[0];
+    selectedSessions.value = [sessionIds[0]];
     
-    await getConvMessages(cids[0], router);
+    await getSessionMsg(sessionIds[0], router);
     
     nextTick(() => {
         messageList.value?.scrollToBottom();
@@ -278,8 +278,8 @@ function handleNewChat() {
     messages.value = [];
 }
 
-async function handleDeleteConversation(cid: string) {
-    await deleteConv(cid);
+async function handleDeleteConversation(sessionId: string) {
+    await deleteSessionFn(sessionId);
     messages.value = [];
 }
 
@@ -303,8 +303,8 @@ async function handleSendMessage() {
         return;
     }
 
-    if (!currCid.value) {
-        await newConversation();
+    if (!currSessionId.value) {
+        await newSession();
     }
 
     const promptToSend = prompt.value.trim();
@@ -340,15 +340,15 @@ watch(
         }
 
         if (to.startsWith('/chat/') || to.startsWith('/chatbox/')) {
-            const pathCid = to.split('/')[2];
-            if (pathCid && pathCid !== currCid.value) {
-                if (conversations.value.length > 0) {
-                    const conversation = conversations.value.find(c => c.cid === pathCid);
-                    if (conversation) {
-                        handleSelectConversation([pathCid]);
+            const pathSessionId = to.split('/')[2];
+            if (pathSessionId && pathSessionId !== currSessionId.value) {
+                if (sessions.value.length > 0) {
+                    const session = sessions.value.find(s => s.session_id === pathSessionId);
+                    if (session) {
+                        handleSelectConversation([pathSessionId]);
                     }
                 } else {
-                    pendingCid.value = pathCid;
+                    pendingSessionId.value = pathSessionId;
                 }
             }
         }
@@ -357,25 +357,25 @@ watch(
 );
 
 // 会话列表加载后处理待定会话
-watch(conversations, (newConversations) => {
-    if (pendingCid.value && newConversations.length > 0) {
-        const conversation = newConversations.find(c => c.cid === pendingCid.value);
-        if (conversation) {
-            selectedConversations.value = [pendingCid.value];
-            handleSelectConversation([pendingCid.value]);
-            pendingCid.value = null;
+watch(sessions, (newSessions) => {
+    if (pendingSessionId.value && newSessions.length > 0) {
+        const session = newSessions.find(s => s.session_id === pendingSessionId.value);
+        if (session) {
+            selectedSessions.value = [pendingSessionId.value];
+            handleSelectConversation([pendingSessionId.value]);
+            pendingSessionId.value = null;
         }
-    } else if (!currCid.value && newConversations.length > 0) {
-        const firstConversation = newConversations[0];
-        selectedConversations.value = [firstConversation.cid];
-        handleSelectConversation([firstConversation.cid]);
+    } else if (!currSessionId.value && newSessions.length > 0) {
+        const firstSession = newSessions[0];
+        selectedSessions.value = [firstSession.session_id];
+        handleSelectConversation([firstSession.session_id]);
     }
 });
 
 onMounted(() => {
     checkMobile();
     window.addEventListener('resize', checkMobile);
-    getConversations();
+    getSessions();
 });
 
 onBeforeUnmount(() => {
@@ -506,4 +506,4 @@ onBeforeUnmount(() => {
         padding: 0 !important;
     }
 }
-</style>
\ No newline at end of file
+</style>
diff --git a/dashboard/src/components/chat/ConversationSidebar.vue b/dashboard/src/components/chat/ConversationSidebar.vue
index 80b574c7f..5abc1bed8 100644
--- a/dashboard/src/components/chat/ConversationSidebar.vue
+++ b/dashboard/src/components/chat/ConversationSidebar.vue
@@ -31,10 +31,10 @@
         </div>
 
         <div style="padding: 16px; padding-top: 8px;">
-            <v-btn block variant="text" class="new-chat-btn" @click="$emit('newChat')" :disabled="!currCid"
+            <v-btn block variant="text" class="new-chat-btn" @click="$emit('newChat')" :disabled="!currSessionId"
                 v-if="!sidebarCollapsed || isMobile" prepend-icon="mdi-plus"
                 style="background-color: transparent !important; border-radius: 4px;">{{ tm('actions.newChat') }}</v-btn>
-            <v-btn icon="mdi-plus" rounded="lg" @click="$emit('newChat')" :disabled="!currCid" 
+            <v-btn icon="mdi-plus" rounded="lg" @click="$emit('newChat')" :disabled="!currSessionId" 
                 v-if="sidebarCollapsed && !isMobile" elevation="0"></v-btn>
         </div>
         
@@ -44,27 +44,27 @@
 
         <div style="overflow-y: auto; flex-grow: 1;" :class="{ 'fade-in': sidebarHoverExpanded }"
             v-if="!sidebarCollapsed || isMobile">
-            <v-card v-if="conversations.length > 0" flat style="background-color: transparent;">
+            <v-card v-if="sessions.length > 0" flat style="background-color: transparent;">
                 <v-list density="compact" nav class="conversation-list"
-                    style="background-color: transparent;" :selected="selectedConversations"
+                    style="background-color: transparent;" :selected="selectedSessions"
                     @update:selected="$emit('selectConversation', $event)">
-                    <v-list-item v-for="item in conversations" :key="item.cid" :value="item.cid"
+                    <v-list-item v-for="item in sessions" :key="item.session_id" :value="item.session_id"
                         rounded="lg" class="conversation-item" active-color="secondary">
                         <v-list-item-title v-if="!sidebarCollapsed || isMobile" class="conversation-title">
-                            {{ item.title || tm('conversation.newConversation') }}
+                            {{ item.display_name || tm('conversation.newConversation') }}
                         </v-list-item-title>
                         <v-list-item-subtitle v-if="!sidebarCollapsed || isMobile" class="timestamp">
-                            {{ formatDate(item.updated_at) }}
+                            {{ new Date(item.updated_at).toLocaleString() }}
                         </v-list-item-subtitle>
 
                         <template v-if="!sidebarCollapsed || isMobile" v-slot:append>
                             <div class="conversation-actions">
                                 <v-btn icon="mdi-pencil" size="x-small" variant="text"
                                     class="edit-title-btn"
-                                    @click.stop="$emit('editTitle', item.cid, item.title)" />
+                                    @click.stop="$emit('editTitle', item.session_id, item.display_name)" />
                                 <v-btn icon="mdi-delete" size="x-small" variant="text"
                                     class="delete-conversation-btn" color="error"
-                                    @click.stop="$emit('deleteConversation', item.cid)" />
+                                    @click.stop="$emit('deleteConversation', item.session_id)" />
                             </div>
                         </template>
                     </v-list-item>
@@ -72,7 +72,7 @@
             </v-card>
 
             <v-fade-transition>
-                <div class="no-conversations" v-if="conversations.length === 0">
+                <div class="no-conversations" v-if="sessions.length === 0">
                     <v-icon icon="mdi-message-text-outline" size="large" color="grey-lighten-1"></v-icon>
                     <div class="no-conversations-text" v-if="!sidebarCollapsed || sidebarHoverExpanded || isMobile">
                         {{ tm('conversation.noHistory') }}
@@ -86,12 +86,12 @@
 <script setup lang="ts">
 import { ref } from 'vue';
 import { useI18n, useModuleI18n } from '@/i18n/composables';
-import type { Conversation } from '@/composables/useConversations';
+import type { Session } from '@/composables/useSessions';
 
 interface Props {
-    conversations: Conversation[];
-    selectedConversations: string[];
-    currCid: string;
+    sessions: Session[];
+    selectedSessions: string[];
+    currSessionId: string;
     isDark: boolean;
     chatboxMode: boolean;
     isMobile: boolean;
@@ -102,9 +102,9 @@ const props = defineProps<Props>();
 
 const emit = defineEmits<{
     newChat: [];
-    selectConversation: [cids: string[]];
-    editTitle: [cid: string, title: string];
-    deleteConversation: [cid: string];
+    selectConversation: [sessionIds: string[]];
+    editTitle: [sessionId: string, title: string];
+    deleteConversation: [sessionId: string];
     closeMobileSidebar: [];
 }>();
 
@@ -159,21 +159,6 @@ function handleSidebarMouseLeave() {
     }
     sidebarHoverExpanded.value = false;
 }
-
-function formatDate(timestamp: number): string {
-    const date = new Date(timestamp * 1000);
-    const options: Intl.DateTimeFormatOptions = {
-        year: 'numeric',
-        month: '2-digit',
-        day: '2-digit',
-        hour: '2-digit',
-        minute: '2-digit',
-        second: '2-digit',
-        hour12: false
-    };
-    const locale = t('core.common.locale') || 'zh-CN';
-    return date.toLocaleString(locale, options).replace(/\//g, '-').replace(/, /g, ' ');
-}
 </script>
 
 <style scoped>
@@ -308,3 +293,4 @@ function formatDate(timestamp: number): string {
     }
 }
 </style>
+
diff --git a/dashboard/src/composables/useMessages.ts b/dashboard/src/composables/useMessages.ts
index dc243f1b4..5e1a6c7a1 100644
--- a/dashboard/src/composables/useMessages.ts
+++ b/dashboard/src/composables/useMessages.ts
@@ -18,10 +18,10 @@ export interface Message {
 }
 
 export function useMessages(
-    currCid: Ref<string>,
+    currSessionId: Ref<string>,
     getMediaFile: (filename: string) => Promise<string>,
-    updateConversationTitle: (cid: string, title: string) => void,
-    onConversationsUpdate: () => void
+    updateSessionTitle: (sessionId: string, title: string) => void,
+    onSessionsUpdate: () => void
 ) {
     const messages = ref<Message[]>([]);
     const isStreaming = ref(false);
@@ -41,23 +41,23 @@ export function useMessages(
         localStorage.setItem('enableStreaming', JSON.stringify(enableStreaming.value));
     }
 
-    async function getConversationMessages(cid: string, router: any) {
-        if (!cid) return;
+    async function getSessionMessages(sessionId: string, router: any) {
+        if (!sessionId) return;
 
         try {
-            const response = await axios.get('/api/chat/get_conversation?conversation_id=' + cid);
+            const response = await axios.get('/api/chat/get_session?session_id=' + sessionId);
             isConvRunning.value = response.data.data.is_running || false;
             let history = response.data.data.history;
 
             if (isConvRunning.value) {
                 if (!isToastedRunningInfo.value) {
-                    useToast().info("该对话正在运行中。", { timeout: 5000 });
+                    useToast().info("该会话正在运行中。", { timeout: 5000 });
                     isToastedRunningInfo.value = true;
                 }
 
-                // 如果对话还在运行，3秒后重新获取消息
+                // 如果会话还在运行，3秒后重新获取消息
                 setTimeout(() => {
-                    getConversationMessages(currCid.value, router);
+                    getSessionMessages(currSessionId.value, router);
                 }, 3000);
             }
 
@@ -159,7 +159,7 @@ export function useMessages(
                 },
                 body: JSON.stringify({
                     message: prompt,
-                    conversation_id: currCid.value,
+                    session_id: currSessionId.value,
                     image_url: imageNames,
                     audio_url: audioName ? [audioName] : [],
                     selected_provider: selectedProviderId,
@@ -256,7 +256,7 @@ export function useMessages(
                                 }
                             }
                         } else if (chunk_json.type === 'update_title') {
-                            updateConversationTitle(chunk_json.cid, chunk_json.data);
+                            updateSessionTitle(chunk_json.session_id, chunk_json.data);
                         }
 
                         if ((chunk_json.type === 'break' && chunk_json.streaming) || !chunk_json.streaming) {
@@ -272,8 +272,8 @@ export function useMessages(
                 }
             }
 
-            // 获取最新的对话列表
-            onConversationsUpdate();
+            // 获取最新的会话列表
+            onSessionsUpdate();
 
         } catch (err) {
             console.error('发送消息失败:', err);
@@ -296,8 +296,9 @@ export function useMessages(
         isStreaming,
         isConvRunning,
         enableStreaming,
-        getConversationMessages,
+        getSessionMessages,
         sendMessage,
         toggleStreaming
     };
 }
+
diff --git a/dashboard/src/composables/useSessions.ts b/dashboard/src/composables/useSessions.ts
new file mode 100644
index 000000000..f14e3aa11
--- /dev/null
+++ b/dashboard/src/composables/useSessions.ts
@@ -0,0 +1,145 @@
+import { ref, computed } from 'vue';
+import axios from 'axios';
+import { useRouter } from 'vue-router';
+
+export interface Session {
+    session_id: string;
+    display_name: string;
+    updated_at: string;
+}
+
+export function useSessions(chatboxMode: boolean = false) {
+    const router = useRouter();
+    const sessions = ref<Session[]>([]);
+    const selectedSessions = ref<string[]>([]);
+    const currSessionId = ref('');
+    const pendingSessionId = ref<string | null>(null);
+
+    // 编辑标题相关
+    const editTitleDialog = ref(false);
+    const editingTitle = ref('');
+    const editingSessionId = ref('');
+
+    const getCurrentSession = computed(() => {
+        if (!currSessionId.value) return null;
+        return sessions.value.find(s => s.session_id === currSessionId.value);
+    });
+
+    async function getSessions() {
+        try {
+            const response = await axios.get('/api/chat/sessions');
+            sessions.value = response.data.data;
+
+            // 处理待加载的会话
+            if (pendingSessionId.value) {
+                const session = sessions.value.find(s => s.session_id === pendingSessionId.value);
+                if (session) {
+                    selectedSessions.value = [pendingSessionId.value];
+                    pendingSessionId.value = null;
+                }
+            } else if (!currSessionId.value && sessions.value.length > 0) {
+                // 默认选择第一个会话
+                const firstSession = sessions.value[0];
+                selectedSessions.value = [firstSession.session_id];
+            }
+        } catch (err: any) {
+            if (err.response?.status === 401) {
+                router.push('/auth/login?redirect=/chatbox');
+            }
+            console.error(err);
+        }
+    }
+
+    async function newSession() {
+        try {
+            const response = await axios.get('/api/chat/new_session');
+            const sessionId = response.data.data.session_id;
+            currSessionId.value = sessionId;
+
+            // 更新 URL
+            const basePath = chatboxMode ? '/chatbox' : '/chat';
+            router.push(`${basePath}/${sessionId}`);
+            
+            await getSessions();
+            return sessionId;
+        } catch (err) {
+            console.error(err);
+            throw err;
+        }
+    }
+
+    async function deleteSession(sessionId: string) {
+        try {
+            await axios.get('/api/chat/delete_session?session_id=' + sessionId);
+            await getSessions();
+            currSessionId.value = '';
+            selectedSessions.value = [];
+        } catch (err) {
+            console.error(err);
+        }
+    }
+
+    function showEditTitleDialog(sessionId: string, title: string) {
+        editingSessionId.value = sessionId;
+        editingTitle.value = title || '';
+        editTitleDialog.value = true;
+    }
+
+    async function saveTitle() {
+        if (!editingSessionId.value) return;
+
+        const trimmedTitle = editingTitle.value.trim();
+        try {
+            await axios.post('/api/chat/update_session_display_name', {
+                session_id: editingSessionId.value,
+                display_name: trimmedTitle
+            });
+
+            // 更新本地会话标题
+            const session = sessions.value.find(s => s.session_id === editingSessionId.value);
+            if (session) {
+                session.display_name = trimmedTitle;
+            }
+            editTitleDialog.value = false;
+        } catch (err) {
+            console.error('重命名会话失败:', err);
+        }
+    }
+
+    function updateSessionTitle(sessionId: string, title: string) {
+        const session = sessions.value.find(s => s.session_id === sessionId);
+        if (session) {
+            session.display_name = title;
+        }
+    }
+
+    function newChat(closeMobileSidebar?: () => void) {
+        currSessionId.value = '';
+        selectedSessions.value = [];
+        
+        const basePath = chatboxMode ? '/chatbox' : '/chat';
+        router.push(basePath);
+        
+        if (closeMobileSidebar) {
+            closeMobileSidebar();
+        }
+    }
+
+    return {
+        sessions,
+        selectedSessions,
+        currSessionId,
+        pendingSessionId,
+        editTitleDialog,
+        editingTitle,
+        editingSessionId,
+        getCurrentSession,
+        getSessions,
+        newSession,
+        deleteSession,
+        showEditTitleDialog,
+        saveTitle,
+        updateSessionTitle,
+        newChat
+    };
+}
diff --git a/dashboard/src/i18n/locales/en-US/features/chat.json b/dashboard/src/i18n/locales/en-US/features/chat.json
index bce552aff..bc83787ff 100644
--- a/dashboard/src/i18n/locales/en-US/features/chat.json
+++ b/dashboard/src/i18n/locales/en-US/features/chat.json
@@ -47,7 +47,11 @@
     "noHistory": "No conversation history",
     "systemStatus": "System Status",
     "llmService": "LLM Service",
-    "speechToText": "Speech to Text"
+    "speechToText": "Speech to Text",
+    "editDisplayName": "Edit Session Name",
+    "displayName": "Session Name",
+    "displayNameUpdated": "Session name updated",
+    "displayNameUpdateFailed": "Failed to update session name"
   },
   "modes": {
     "darkMode": "Switch to Dark Mode",
diff --git a/dashboard/src/i18n/locales/zh-CN/features/chat.json b/dashboard/src/i18n/locales/zh-CN/features/chat.json
index 37bacd408..002ea626e 100644
--- a/dashboard/src/i18n/locales/zh-CN/features/chat.json
+++ b/dashboard/src/i18n/locales/zh-CN/features/chat.json
@@ -43,11 +43,15 @@
     "exitFullscreen": "退出全屏"
   },
   "conversation": {
-    "newConversation": "新对话",
+    "newConversation": "新的聊天",
     "noHistory": "暂无对话历史",
     "systemStatus": "系统状态",
     "llmService": "LLM 服务",
-    "speechToText": "语音转文本"
+    "speechToText": "语音转文本",
+    "editDisplayName": "编辑会话名称",
+    "displayName": "会话名称",
+    "displayNameUpdated": "会话名称已更新",
+    "displayNameUpdateFailed": "更新会话名称失败"
   },
   "modes": {
     "darkMode": "切换到夜间模式",