diff --git a/astrbot/core/db/__init__.py b/astrbot/core/db/__init__.py
index a8a4b0ad5..9929e9ce2 100644
--- a/astrbot/core/db/__init__.py
+++ b/astrbot/core/db/__init__.py
@@ -203,6 +203,23 @@ class BaseDatabase(abc.ABC):
         """Get platform message history for a specific user."""
         ...
 
+    @abc.abstractmethod
+    async def search_platform_sessions(
+        self,
+        creator: str,
+        query: str,
+        context_len: int = 40,
+        page: int = 1,
+        page_size: int = 10,
+    ) -> tuple[list[dict], int]:
+        """Search platform sessions (title or message content) for a given creator.
+
+        Returns a tuple of (results, total) where results is a list of dicts with keys:
+        session_id, title, match_field, match_index, match_length, snippet, snippet_start,
+        created_at, updated_at
+        """
+        ...
+
     @abc.abstractmethod
     async def get_platform_message_history_by_id(
         self,
diff --git a/astrbot/core/db/sqlite.py b/astrbot/core/db/sqlite.py
index 3af08f248..7899113e3 100644
--- a/astrbot/core/db/sqlite.py
+++ b/astrbot/core/db/sqlite.py
@@ -1,4 +1,5 @@
 import asyncio
+import json
 import threading
 import typing as T
 from collections.abc import Awaitable, Callable
@@ -483,6 +484,144 @@ class SQLiteDatabase(BaseDatabase):
             result = await session.execute(query.offset(offset).limit(page_size))
             return result.scalars().all()
 
+    def _build_snippet(self, text: str, match_index: int, match_length: int, context_len: int):
+        if match_index < 0:
+            return "", 0
+        start = max(match_index - context_len, 0)
+        end = min(match_index + match_length + context_len, len(text))
+        return text[start:end], start
+
+    async def search_platform_sessions(
+        self,
+        creator: str,
+        query: str,
+        context_len: int = 40,
+        page: int = 1,
+        page_size: int = 10,
+    ) -> tuple[list[dict], int]:
+        """Search platform sessions (by title or by message content) for a given creator.
+
+        This implementation performs searching at DB level using SQL LIKE on
+        `platform_sessions.display_name` and the JSON `platform_message_history.content`.
+        To keep work minimal and compatible with SQLite JSON storage, the content
+        column is searched as text using LIKE.
+        Returns (results, total) where results are dicts suitable for the caller.
+        """
+        async with self.get_db() as session:
+            session: AsyncSession
+            pattern = f"%{query}%"
+
+            # 1) Title matches
+            title_q = (
+                select(PlatformSession)
+                .where(col(PlatformSession.creator) == creator)
+                .where(col(PlatformSession.display_name).ilike(pattern))
+                .order_by(desc(PlatformSession.updated_at))
+            )
+            title_result = await session.execute(title_q)
+            title_rows = title_result.scalars().all()
+
+            results: list[dict] = []
+            for session_row in title_rows:
+                title = session_row.display_name or ""
+                title_lower = title.lower()
+                qlower = query.lower()
+                match_index = title_lower.find(qlower) if title else -1
+                snippet, snippet_start = self._build_snippet(title, match_index, len(query), context_len)
+                results.append(
+                    {
+                        "session_id": session_row.session_id,
+                        "title": session_row.display_name,
+                        "match_field": "title",
+                        "match_index": match_index,
+                        "match_length": len(query),
+                        "snippet": snippet,
+                        "snippet_start": snippet_start,
+                        "created_at": session_row.created_at.astimezone().isoformat(),
+                        "updated_at": session_row.updated_at.astimezone().isoformat(),
+                    }
+                )
+
+            # 2) Content matches: find latest matching message per session (user_id)
+            # Use a subquery to select the latest message id per user that matches the pattern
+            subq = (
+                select(func.max(col(PlatformMessageHistory.id)).label("max_id"))
+                .select_from(PlatformMessageHistory)
+                .join(
+                    PlatformSession,
+                    col(PlatformMessageHistory.user_id) == col(PlatformSession.session_id),
+                )
+                .where(col(PlatformSession.creator) == creator)
+                .where(col(PlatformMessageHistory.content).ilike(pattern))
+                .group_by(col(PlatformMessageHistory.user_id))
+            )
+
+            ids_result = await session.execute(subq)
+            id_rows = [r[0] for r in ids_result.fetchall() if r[0] is not None]
+
+            if id_rows:
+                q = select(PlatformMessageHistory).where(col(PlatformMessageHistory.id).in_(id_rows))
+                q = q.order_by(desc(PlatformMessageHistory.created_at))
+                hist_result = await session.execute(q)
+                histories = hist_result.scalars().all()
+
+                for history in histories:
+                    # find associated session to get display_name/created_at/updated_at
+                    ps_q = select(PlatformSession).where(col(PlatformSession.session_id) == history.user_id)
+                    ps_res = await session.execute(ps_q)
+                    ps = ps_res.scalar_one_or_none()
+                    text = None
+                    try:
+                        # convert content json to plain text similar to ChatRoute._extract_plain_text
+                        msg = history.content
+                        if isinstance(msg, dict):
+                            message = msg.get("message")
+                            if isinstance(message, str):
+                                text = message
+                            elif isinstance(message, list):
+                                parts = []
+                                for part in message:
+                                    if not isinstance(part, dict):
+                                        continue
+                                    part_type = part.get("type")
+                                    if part_type == "plain" and part.get("text"):
+                                        parts.append(str(part.get("text")))
+                                    elif part_type == "reply" and part.get("selected_text"):
+                                        parts.append(str(part.get("selected_text")))
+                                text = "\n".join(parts)
+                    except Exception:
+                        text = None
+
+                    if not text:
+                        # fallback to stringified JSON
+                        text = json.dumps(history.content, ensure_ascii=False)
+
+                    lower_text = text.lower() if isinstance(text, str) else ""
+                    match_index = lower_text.find(query.lower())
+                    if match_index == -1:
+                        continue
+                    snippet, snippet_start = self._build_snippet(text, match_index, len(query), context_len)
+                    results.append(
+                        {
+                            "session_id": history.user_id,
+                            "title": ps.display_name if ps else None,
+                            "match_field": "content",
+                            "match_index": match_index,
+                            "match_length": len(query),
+                            "snippet": snippet,
+                            "snippet_start": snippet_start,
+                            "created_at": ps.created_at.astimezone().isoformat() if ps else history.created_at.astimezone().isoformat(),
+                            "updated_at": ps.updated_at.astimezone().isoformat() if ps else history.updated_at.astimezone().isoformat(),
+                        }
+                    )
+
+            # sort and paginate
+            results.sort(key=lambda item: item["updated_at"], reverse=True)
+            total = len(results)
+            offset = (page - 1) * page_size
+            paged = results[offset : offset + page_size]
+            return paged, total
+
     async def get_platform_message_history_by_id(
         self, message_id: int
     ) -> PlatformMessageHistory | None:
diff --git a/astrbot/dashboard/routes/chat.py b/astrbot/dashboard/routes/chat.py
index 92ff4c3fe..805a524c6 100644
--- a/astrbot/dashboard/routes/chat.py
+++ b/astrbot/dashboard/routes/chat.py
@@ -46,6 +46,7 @@ class ChatRoute(Route):
                 "POST",
                 self.update_session_display_name,
             ),
+            "/chat/search": ("GET", self.search_sessions),
             "/chat/get_file": ("GET", self.get_file),
             "/chat/get_attachment": ("GET", self.get_attachment),
             "/chat/post_file": ("POST", self.post_file),
@@ -63,6 +64,35 @@ class ChatRoute(Route):
 
         self.running_convs: dict[str, bool] = {}
 
+    @staticmethod
+    def _extract_plain_text(content: dict) -> str:
+        if not isinstance(content, dict):
+            return ""
+        message = content.get("message")
+        if isinstance(message, str):
+            return message
+        if not isinstance(message, list):
+            return ""
+
+        parts = []
+        for part in message:
+            if not isinstance(part, dict):
+                continue
+            part_type = part.get("type")
+            if part_type == "plain" and part.get("text"):
+                parts.append(str(part.get("text")))
+            elif part_type == "reply" and part.get("selected_text"):
+                parts.append(str(part.get("selected_text")))
+        return "\n".join(parts)
+
+    @staticmethod
+    def _build_snippet(text: str, match_index: int, match_length: int, context_len: int):
+        if match_index < 0:
+            return "", 0
+        start = max(match_index - context_len, 0)
+        end = min(match_index + match_length + context_len, len(text))
+        return text[start:end], start
+
     async def get_file(self):
         filename = request.args.get("filename")
         if not filename:
@@ -731,6 +761,57 @@ class ChatRoute(Route):
 
         return Response().ok(data=sessions_data).__dict__
 
+    async def search_sessions(self):
+        """Search sessions by title or content, with pagination."""
+        username = g.get("username", "guest")
+        query = request.args.get("query", "", type=str).strip()
+        page = max(request.args.get("page", 1, type=int), 1)
+        page_size = min(max(request.args.get("page_size", 10, type=int), 1), 100)
+        context_len = min(max(request.args.get("context", 40, type=int), 0), 200)
+
+        if not query:
+            return (
+                Response()
+                .ok(
+                    data={
+                        "results": [],
+                        "pagination": {
+                            "page": page,
+                            "page_size": page_size,
+                            "total": 0,
+                            "total_pages": 1,
+                        },
+                    }
+                )
+                .__dict__
+            )
+
+        # Delegate searching to the database implementation for efficiency
+        paged_results, total = await self.db.search_platform_sessions(
+            creator=username,
+            query=query,
+            context_len=context_len,
+            page=page,
+            page_size=page_size,
+        )
+
+        total_pages = (total + page_size - 1) // page_size if total > 0 else 1
+        return (
+            Response()
+            .ok(
+                data={
+                    "results": paged_results,
+                    "pagination": {
+                        "page": page,
+                        "page_size": page_size,
+                        "total": total,
+                        "total_pages": total_pages,
+                    },
+                }
+            )
+            .__dict__
+        )
+
     async def get_session(self):
         """Get session information and message history by session_id."""
         session_id = request.args.get("session_id")
diff --git a/dashboard/src/components/chat/Chat.vue b/dashboard/src/components/chat/Chat.vue
index 71e46e690..d650b1e50 100644
--- a/dashboard/src/components/chat/Chat.vue
+++ b/dashboard/src/components/chat/Chat.vue
@@ -26,6 +26,7 @@
                     @createProject="showCreateProjectDialog"
                     @editProject="showEditProjectDialog"
                     @deleteProject="handleDeleteProject"
+                    @openSearch="handleOpenSearch"
                 />
 
                 <!-- 右侧聊天内容区域 -->
@@ -42,65 +43,99 @@
                             </v-btn>
                         </div>
 
-                        <!-- 面包屑导航 -->
-                        <div v-if="currentSessionProject && messages && messages.length > 0" class="breadcrumb-container">
-                            <div class="breadcrumb-content">
-                                <span class="breadcrumb-emoji">{{ currentSessionProject.emoji || '📁' }}</span>
-                                <span class="breadcrumb-project" @click="handleSelectProject(currentSessionProject.project_id)">{{ currentSessionProject.title }}</span>
-                                <v-icon size="small" class="breadcrumb-separator">mdi-chevron-right</v-icon>
-                                <span class="breadcrumb-session">{{ getCurrentSession?.display_name || tm('conversation.newConversation') }}</span>
-                            </div>
-                        </div>
-
-                        <div class="message-list-wrapper" v-if="currSessionId && !selectedProjectId">
-                            <MessageList :messages="messages" :isDark="isDark"
-                                :isStreaming="isStreaming || isConvRunning" 
-                                :isLoadingMessages="isLoadingMessages"
-                                @openImagePreview="openImagePreview"
-                                @replyMessage="handleReplyMessage"
-                                @replyWithText="handleReplyWithText"
-                                @openRefs="handleOpenRefs"
-                                ref="messageList" />
-                            <div class="message-list-fade" :class="{ 'fade-dark': isDark }"></div>
-                        </div>
-                        <ProjectView 
-                            v-else-if="selectedProjectId"
-                            :project="currentProject"
-                            :sessions="projectSessions"
+                        <ChatSearchView
+                            v-if="isSearchActive"
+                            @close="handleCloseSearch"
                             @selectSession="(sessionId) => handleSelectConversation([sessionId])"
-                            @editSessionTitle="showEditTitleDialog"
-                            @deleteSession="handleDeleteConversation"
-                        >
-                            <ChatInput
-                                v-model:prompt="prompt"
-                                :stagedImagesUrl="stagedImagesUrl"
-                                :stagedAudioUrl="stagedAudioUrl"
-                                :stagedFiles="stagedNonImageFiles"
-                                :disabled="isStreaming"
-                                :enableStreaming="enableStreaming"
-                                :isRecording="isRecording"
-                                :session-id="currSessionId || null"
-                                :current-session="getCurrentSession"
-                                :replyTo="replyTo"
-                                @send="handleSendMessage"
-                                @toggleStreaming="toggleStreaming"
-                                @removeImage="removeImage"
-                                @removeAudio="removeAudio"
-                                @removeFile="removeFile"
-                                @startRecording="handleStartRecording"
-                                @stopRecording="handleStopRecording"
-                            @pasteImage="handlePaste"
-                            @fileSelect="handleFileSelect"
-                            @clearReply="clearReply"
-                            @openLiveMode="openLiveMode"
-                            ref="chatInputRef"
                         />
-                        </ProjectView>
-                        <WelcomeView 
-                            v-else
-                            :isLoading="isLoadingMessages"
-                        >
+                        <template v-else>
+                            <!-- 面包屑导航 -->
+                            <div v-if="currentSessionProject && messages && messages.length > 0" class="breadcrumb-container">
+                                <div class="breadcrumb-content">
+                                    <span class="breadcrumb-emoji">{{ currentSessionProject.emoji || '📁' }}</span>
+                                    <span class="breadcrumb-project" @click="handleSelectProject(currentSessionProject.project_id)">{{ currentSessionProject.title }}</span>
+                                    <v-icon size="small" class="breadcrumb-separator">mdi-chevron-right</v-icon>
+                                    <span class="breadcrumb-session">{{ getCurrentSession?.display_name || tm('conversation.newConversation') }}</span>
+                                </div>
+                            </div>
+
+                            <div class="message-list-wrapper" v-if="currSessionId && !selectedProjectId">
+                                <MessageList :messages="messages" :isDark="isDark"
+                                    :isStreaming="isStreaming || isConvRunning" 
+                                    :isLoadingMessages="isLoadingMessages"
+                                    @openImagePreview="openImagePreview"
+                                    @replyMessage="handleReplyMessage"
+                                    @replyWithText="handleReplyWithText"
+                                    @openRefs="handleOpenRefs"
+                                    ref="messageList" />
+                                <div class="message-list-fade" :class="{ 'fade-dark': isDark }"></div>
+                            </div>
+                            <ProjectView 
+                                v-else-if="selectedProjectId"
+                                :project="currentProject"
+                                :sessions="projectSessions"
+                                @selectSession="(sessionId) => handleSelectConversation([sessionId])"
+                                @editSessionTitle="showEditTitleDialog"
+                                @deleteSession="handleDeleteConversation"
+                            >
+                                <ChatInput
+                                    v-model:prompt="prompt"
+                                    :stagedImagesUrl="stagedImagesUrl"
+                                    :stagedAudioUrl="stagedAudioUrl"
+                                    :stagedFiles="stagedNonImageFiles"
+                                    :disabled="isStreaming"
+                                    :enableStreaming="enableStreaming"
+                                    :isRecording="isRecording"
+                                    :session-id="currSessionId || null"
+                                    :current-session="getCurrentSession"
+                                    :replyTo="replyTo"
+                                    @send="handleSendMessage"
+                                    @toggleStreaming="toggleStreaming"
+                                    @removeImage="removeImage"
+                                    @removeAudio="removeAudio"
+                                    @removeFile="removeFile"
+                                    @startRecording="handleStartRecording"
+                                    @stopRecording="handleStopRecording"
+                                    @pasteImage="handlePaste"
+                                    @fileSelect="handleFileSelect"
+                                    @clearReply="clearReply"
+                                    @openLiveMode="openLiveMode"
+                                    ref="chatInputRef"
+                                />
+                            </ProjectView>
+                            <WelcomeView 
+                                v-else
+                                :isLoading="isLoadingMessages"
+                            >
+                                <ChatInput
+                                    v-model:prompt="prompt"
+                                    :stagedImagesUrl="stagedImagesUrl"
+                                    :stagedAudioUrl="stagedAudioUrl"
+                                    :stagedFiles="stagedNonImageFiles"
+                                    :disabled="isStreaming"
+                                    :enableStreaming="enableStreaming"
+                                    :isRecording="isRecording"
+                                    :session-id="currSessionId || null"
+                                    :current-session="getCurrentSession"
+                                    :replyTo="replyTo"
+                                    @send="handleSendMessage"
+                                    @toggleStreaming="toggleStreaming"
+                                    @removeImage="removeImage"
+                                    @removeAudio="removeAudio"
+                                    @removeFile="removeFile"
+                                    @startRecording="handleStartRecording"
+                                    @stopRecording="handleStopRecording"
+                                    @pasteImage="handlePaste"
+                                    @fileSelect="handleFileSelect"
+                                    @clearReply="clearReply"
+                                    @openLiveMode="openLiveMode"
+                                    ref="chatInputRef"
+                                />
+                            </WelcomeView>
+
+                            <!-- 输入区域 -->
                             <ChatInput
+                                v-if="currSessionId && !selectedProjectId"
                                 v-model:prompt="prompt"
                                 :stagedImagesUrl="stagedImagesUrl"
                                 :stagedAudioUrl="stagedAudioUrl"
@@ -124,34 +159,7 @@
                                 @openLiveMode="openLiveMode"
                                 ref="chatInputRef"
                             />
-                        </WelcomeView>
-
-                        <!-- 输入区域 -->
-                        <ChatInput
-                            v-if="currSessionId && !selectedProjectId"
-                            v-model:prompt="prompt"
-                            :stagedImagesUrl="stagedImagesUrl"
-                            :stagedAudioUrl="stagedAudioUrl"
-                            :stagedFiles="stagedNonImageFiles"
-                            :disabled="isStreaming"
-                            :enableStreaming="enableStreaming"
-                            :isRecording="isRecording"
-                            :session-id="currSessionId || null"
-                            :current-session="getCurrentSession"
-                            :replyTo="replyTo"
-                            @send="handleSendMessage"
-                            @toggleStreaming="toggleStreaming"
-                            @removeImage="removeImage"
-                            @removeAudio="removeAudio"
-                            @removeFile="removeFile"
-                            @startRecording="handleStartRecording"
-                            @stopRecording="handleStopRecording"
-                            @pasteImage="handlePaste"
-                            @fileSelect="handleFileSelect"
-                            @clearReply="clearReply"
-                            @openLiveMode="openLiveMode"
-                            ref="chatInputRef"
-                        />
+                        </template>
                     </template>
                 </div>
 
@@ -200,6 +208,7 @@
 
 <script setup lang="ts">
 import { ref, computed, watch, onMounted, onBeforeUnmount, nextTick } from 'vue';
+import { storeToRefs } from 'pinia';
 import { useRouter, useRoute } from 'vue-router';
 import { useCustomizerStore } from '@/stores/customizer';
 import { useI18n, useModuleI18n } from '@/i18n/composables';
@@ -209,6 +218,7 @@ import ConversationSidebar from '@/components/chat/ConversationSidebar.vue';
 import ChatInput from '@/components/chat/ChatInput.vue';
 import ProjectDialog from '@/components/chat/ProjectDialog.vue';
 import ProjectView from '@/components/chat/ProjectView.vue';
+import ChatSearchView from '@/components/chat/ChatSearchView.vue';
 import WelcomeView from '@/components/chat/WelcomeView.vue';
 import RefsSidebar from '@/components/chat/message_list_comps/RefsSidebar.vue';
 import LiveMode from '@/components/chat/LiveMode.vue';
@@ -219,6 +229,7 @@ import { useMediaHandling } from '@/composables/useMediaHandling';
 import { useProjects } from '@/composables/useProjects';
 import type { Project } from '@/components/chat/ProjectList.vue';
 import { useRecording } from '@/composables/useRecording';
+import { useChatSearchStore } from '@/stores/chatSearch';
 
 interface Props {
     chatboxMode?: boolean;
@@ -233,6 +244,8 @@ const route = useRoute();
 const { t } = useI18n();
 const { tm } = useModuleI18n('features/chat');
 const theme = useTheme();
+const chatSearchStore = useChatSearchStore();
+const { active: isSearchActive } = storeToRefs(chatSearchStore);
 
 // UI 状态
 const isMobile = ref(false);
@@ -436,12 +449,15 @@ function handleOpenRefs(refs: any) {
     }
 }
 
-async function handleSelectConversation(sessionIds: string[]) {
+async function handleSelectConversation(sessionIds: string[], shouldCloseSearch: boolean = true) {
     if (!sessionIds[0]) return;
 
     // 退出项目视图
     selectedProjectId.value = null;
     projectSessions.value = [];
+    if (shouldCloseSearch) {
+        chatSearchStore.closeSearch();
+    }
 
     // 立即更新选中状态，避免需要点击两次
     currSessionId.value = sessionIds[0];
@@ -482,6 +498,7 @@ function handleNewChat() {
     // 退出项目视图
     selectedProjectId.value = null;
     projectSessions.value = [];
+    chatSearchStore.closeSearch();
 }
 
 async function handleDeleteConversation(sessionId: string) {
@@ -500,6 +517,7 @@ async function handleSelectProject(projectId: string) {
     const sessions = await getProjectSessions(projectId);
     projectSessions.value = sessions;
     messages.value = [];
+    chatSearchStore.closeSearch();
 
     // 清空当前会话ID，准备在项目中创建新对话
     currSessionId.value = '';
@@ -573,6 +591,17 @@ function closeLiveMode() {
     liveModeOpen.value = false;
 }
 
+function handleOpenSearch() {
+    chatSearchStore.openSearch();
+    if (isMobile.value) {
+        closeMobileSidebar();
+    }
+}
+
+function handleCloseSearch() {
+    chatSearchStore.closeSearch();
+}
+
 async function handleSendMessage() {
     // 只有引用不能发送，必须有输入内容
     if (!prompt.value.trim() && stagedFiles.value.length === 0 && !stagedAudioUrl.value) {
@@ -647,7 +676,7 @@ watch(
                 if (sessions.value.length > 0) {
                     const session = sessions.value.find(s => s.session_id === pathSessionId);
                     if (session) {
-                        handleSelectConversation([pathSessionId]);
+                        handleSelectConversation([pathSessionId], !isSearchActive.value);
                     }
                 } else {
                     pendingSessionId.value = pathSessionId;
@@ -664,13 +693,13 @@ watch(sessions, (newSessions) => {
         const session = newSessions.find(s => s.session_id === pendingSessionId.value);
         if (session) {
             selectedSessions.value = [pendingSessionId.value];
-            handleSelectConversation([pendingSessionId.value]);
+            handleSelectConversation([pendingSessionId.value], !isSearchActive.value);
             pendingSessionId.value = null;
         }
     } else if (!currSessionId.value && newSessions.length > 0) {
         const firstSession = newSessions[0];
         selectedSessions.value = [firstSession.session_id];
-        handleSelectConversation([firstSession.session_id]);
+        handleSelectConversation([firstSession.session_id], !isSearchActive.value);
     }
 });
 
diff --git a/dashboard/src/components/chat/ChatSearchView.vue b/dashboard/src/components/chat/ChatSearchView.vue
new file mode 100644
index 000000000..e0969fa5b
--- /dev/null
+++ b/dashboard/src/components/chat/ChatSearchView.vue
@@ -0,0 +1,313 @@
+<template>
+    <div class="chat-search-container fade-in">
+        <div class="chat-search-header">
+            <div class="chat-search-header-info">
+                <h2 class="chat-search-header-title">{{ tm('search.title') }}</h2>
+            </div>
+        </div>
+
+        <div class="chat-search-input">
+            <v-text-field
+                v-model="query"
+                :placeholder="tm('search.placeholder')"
+                prepend-inner-icon="mdi-magnify"
+                variant="outlined"
+                rounded="xl"
+                density="comfortable"
+                clearable
+                flat
+                hide-details
+                :loading="isLoading"
+                @keyup.enter="handleSearch"
+                @click:clear="handleClear"
+            />
+        </div>
+
+        <v-card flat class="chat-search-results">
+            <v-list v-if="results.length > 0">
+                <v-list-item
+                    v-for="item in results"
+                    :key="item.session_id"
+                    class="chat-search-result-item"
+                    rounded="lg"
+                    @click="emit('selectSession', item.session_id)"
+                >
+                    <v-list-item-title style="font-weight: bold;">
+                        {{ item.title || tm('conversation.newConversation') }}
+                    </v-list-item-title>
+                    <v-list-item-subtitle class="chat-search-snippet">
+                        <span>{{ getSnippetParts(item).before }}</span>
+                        <span class="chat-search-highlight">{{ getSnippetParts(item).match }}</span>
+                        <span>{{ getSnippetParts(item).after }}</span>
+                    </v-list-item-subtitle>
+                    <v-list-item-subtitle class="chat-search-meta">
+                        <!-- {{ getMatchFieldLabel(item) }} -->
+                        <!-- · {{ tm('search.matchPosition') }} {{ item.match_index + 1 }} -->
+                        {{ tm('search.createdAt') }} {{ formatDate(item.created_at) }}
+                        · {{ tm('search.updatedAt') }} {{ formatDate(item.updated_at) }}
+                    </v-list-item-subtitle>
+                </v-list-item>
+            </v-list>
+            <div v-else class="chat-search-empty">
+                <v-icon icon="mdi-text-box-search-outline" size="large" color="grey-lighten-1"></v-icon>
+                <p>
+                    {{ searchPerformed ? tm('search.noResults') : tm('search.hint') }}
+                </p>
+            </div>
+        </v-card>
+
+        <div v-if="pagination.total > 0" class="chat-search-pagination">
+            <div class="chat-search-page-size">
+                <span class="chat-search-page-label">{{ tm('search.pageSize') }}</span>
+                <v-select
+                    v-model="pageSizeProxy"
+                    :items="pageSizeOptions"
+                    variant="outlined"
+                    density="compact"
+                    hide-details
+                    :disabled="isLoading"
+                />
+            </div>
+            <v-pagination
+                v-model="pageProxy"
+                :length="pagination.total_pages"
+                :disabled="isLoading"
+                rounded="circle"
+                :total-visible="7"
+            />
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+import { computed, onBeforeUnmount, ref, watch } from 'vue';
+import { storeToRefs } from 'pinia';
+import { useI18n, useModuleI18n } from '@/i18n/composables';
+import { useChatSearchStore, type ChatSearchResult } from '@/stores/chatSearch';
+
+const emit = defineEmits<{
+    close: [];
+    selectSession: [sessionId: string];
+}>();
+
+const { t } = useI18n();
+const { tm } = useModuleI18n('features/chat');
+
+const chatSearchStore = useChatSearchStore();
+const { query, results, pagination, isLoading, searchPerformed } = storeToRefs(chatSearchStore);
+
+const pageSizeOptions = [10, 20, 50];
+const searchTimeout = ref<ReturnType<typeof setTimeout> | null>(null);
+const debounceDelay = 400;
+
+const pageProxy = computed({
+    get: () => pagination.value.page,
+    set: (value) => chatSearchStore.setPage(value)
+});
+
+const pageSizeProxy = computed({
+    get: () => pagination.value.page_size,
+    set: (value) => chatSearchStore.setPageSize(value)
+});
+
+function handleSearch() {
+    chatSearchStore.runNewSearch();
+}
+
+function handleClear() {
+    chatSearchStore.search();
+}
+
+function scheduleSearch() {
+    if (searchTimeout.value) {
+        clearTimeout(searchTimeout.value);
+    }
+    searchTimeout.value = setTimeout(() => {
+        chatSearchStore.runNewSearch();
+    }, debounceDelay);
+}
+
+watch(query, (value) => {
+    if (!value || !value.trim()) {
+        if (searchTimeout.value) {
+            clearTimeout(searchTimeout.value);
+        }
+        chatSearchStore.search();
+        return;
+    }
+    scheduleSearch();
+});
+
+onBeforeUnmount(() => {
+    if (searchTimeout.value) {
+        clearTimeout(searchTimeout.value);
+    }
+});
+
+function formatDate(dateString: string): string {
+    return new Date(dateString).toLocaleString();
+}
+
+function getSnippetParts(item: ChatSearchResult) {
+    const localIndex = Math.max(0, item.match_index - item.snippet_start);
+    return {
+        before: item.snippet.slice(0, localIndex),
+        match: item.snippet.slice(localIndex, localIndex + item.match_length),
+        after: item.snippet.slice(localIndex + item.match_length)
+    };
+}
+
+function getMatchFieldLabel(item: ChatSearchResult) {
+    return item.match_field === 'title' ? tm('search.matchTitle') : tm('search.matchContent');
+}
+</script>
+
+<style scoped>
+.chat-search-container {
+    height: 100%;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    padding: 32px;
+    overflow-y: auto;
+}
+
+.chat-search-header {
+    text-align: center;
+    margin-bottom: 24px;
+    max-width: 640px;
+}
+
+.chat-search-header-info {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 12px;
+    margin-bottom: 12px;
+}
+
+.chat-search-header-emoji {
+    font-size: 44px;
+}
+
+.chat-search-header-title {
+    font-size: 30px;
+    font-weight: 600;
+}
+
+.chat-search-header-description {
+    font-size: 14px;
+    color: var(--v-theme-secondaryText);
+    margin: 0 0 12px;
+}
+
+.chat-search-input {
+    width: 100%;
+    max-width: 730px;
+    display: flex;
+    gap: 12px;
+    align-items: center;
+    margin-bottom: 20px;
+}
+
+.chat-search-results {
+    width: 100%;
+    max-width: 760px;
+    background-color: transparent !important;
+}
+
+.chat-search-result-item {
+    margin-bottom: 8px;
+    border-radius: 12px !important;
+    cursor: pointer;
+}
+
+.chat-search-result-item:hover {
+    background-color: rgba(103, 58, 183, 0.05);
+}
+
+.chat-search-snippet {
+    font-size: 14px;
+    color: var(--v-theme-secondaryText);
+    margin-top: 4px;
+}
+
+.chat-search-highlight {
+    background-color: rgba(255, 204, 102, 0.45);
+    padding: 0 2px;
+    border-radius: 4px;
+}
+
+.chat-search-meta {
+    font-size: 12px;
+    margin-top: 6px;
+    opacity: 1;
+}
+
+.chat-search-empty {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    padding: 48px;
+    opacity: 0.6;
+}
+
+.chat-search-empty p {
+    margin-top: 12px;
+    font-size: 14px;
+}
+
+.chat-search-pagination {
+    width: 100%;
+    max-width: 760px;
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 16px;
+    padding: 12px 4px 0;
+}
+
+.chat-search-page-size {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    min-width: 200px;
+}
+
+.chat-search-page-label {
+    font-size: 12px;
+    color: var(--v-theme-secondaryText);
+}
+
+.fade-in {
+    animation: fadeIn 0.3s ease-in-out;
+}
+
+@keyframes fadeIn {
+    from {
+        opacity: 0;
+        transform: translateY(10px);
+    }
+
+    to {
+        opacity: 1;
+        transform: translateY(0);
+    }
+}
+
+@media (max-width: 768px) {
+    .chat-search-container {
+        padding: 24px 16px;
+    }
+
+    .chat-search-input {
+        flex-direction: column;
+    }
+
+    .chat-search-pagination {
+        flex-direction: column;
+        align-items: flex-start;
+    }
+}
+</style>
diff --git a/dashboard/src/components/chat/ConversationSidebar.vue b/dashboard/src/components/chat/ConversationSidebar.vue
index fe25ef34c..f4e875a25 100644
--- a/dashboard/src/components/chat/ConversationSidebar.vue
+++ b/dashboard/src/components/chat/ConversationSidebar.vue
@@ -20,6 +20,15 @@
             </v-btn>
         </div>
 
+        <div style="padding: 8px; padding-bottom: 0px; opacity: 0.6;">
+            <v-btn block variant="text" class="search-chat-btn" @click="$emit('openSearch')"
+                v-if="!sidebarCollapsed || isMobile" prepend-icon="mdi-magnify">
+                {{ t('core.actions.search') }}
+            </v-btn>
+            <v-btn icon="mdi-magnify" rounded="xl" @click="$emit('openSearch')" 
+                v-if="sidebarCollapsed && !isMobile" elevation="0"></v-btn>
+        </div>
+
         <div style="padding: 8px; opacity: 0.6;">
             <v-btn block variant="text" class="new-chat-btn" @click="$emit('newChat')" :disabled="!currSessionId && !selectedProjectId"
                 v-if="!sidebarCollapsed || isMobile" prepend-icon="mdi-square-edit-outline">{{ tm('actions.newChat') }}</v-btn>
@@ -178,6 +187,7 @@ const emit = defineEmits<{
     createProject: [];
     editProject: [project: Project];
     deleteProject: [projectId: string];
+    openSearch: [];
 }>();
 
 const { t } = useI18n();
@@ -264,6 +274,13 @@ function handleDeleteConversation(session: Session) {
     padding: 8px 16px !important;
 }
 
+.search-chat-btn {
+    justify-content: flex-start;
+    background-color: transparent !important;
+    border-radius: 20px;
+    padding: 8px 16px !important;
+}
+
 .conversation-item {
     /* margin-bottom: 4px; */
     border-radius: 20px !important;
@@ -359,4 +376,3 @@ function handleDeleteConversation(session: Session) {
     justify-content: center;
 }
 </style>
-
diff --git a/dashboard/src/i18n/locales/en-US/features/chat.json b/dashboard/src/i18n/locales/en-US/features/chat.json
index 385914065..c81412109 100644
--- a/dashboard/src/i18n/locales/en-US/features/chat.json
+++ b/dashboard/src/i18n/locales/en-US/features/chat.json
@@ -98,6 +98,18 @@
     "noSessions": "No conversations in this project",
     "confirmDelete": "Are you sure you want to delete project \"{title}\"? Conversations in this project will not be deleted."
   },
+  "search": {
+    "title": "Search",
+    "placeholder": "Enter keywords to search titles or content",
+    "hint": "Enter keywords to start searching",
+    "noResults": "No matching conversations found",
+    "matchTitle": "Title match",
+    "matchContent": "Content match",
+    "matchPosition": "Match position",
+    "createdAt": "Created",
+    "updatedAt": "Updated",
+    "pageSize": "Items per page"
+  },
   "time": {
     "today": "Today",
     "yesterday": "Yesterday"
@@ -133,4 +145,4 @@
     "sendMessageFailed": "Failed to send message, please try again",
     "createSessionFailed": "Failed to create session, please refresh the page"
   }
-} 
\ No newline at end of file
+} 
diff --git a/dashboard/src/i18n/locales/zh-CN/features/chat.json b/dashboard/src/i18n/locales/zh-CN/features/chat.json
index 086e335a1..e3b13706e 100644
--- a/dashboard/src/i18n/locales/zh-CN/features/chat.json
+++ b/dashboard/src/i18n/locales/zh-CN/features/chat.json
@@ -100,6 +100,18 @@
     "noSessions": "该项目暂无对话",
     "confirmDelete": "确定要删除项目 \"{title}\" 吗？项目中的对话不会被删除。"
   },
+  "search": {
+    "title": "搜索",
+    "placeholder": "输入关键词搜索标题或内容",
+    "hint": "输入关键词开始搜索",
+    "noResults": "没有找到匹配的对话",
+    "matchTitle": "标题匹配",
+    "matchContent": "内容匹配",
+    "matchPosition": "匹配位置",
+    "createdAt": "创建",
+    "updatedAt": "更新",
+    "pageSize": "每页条数"
+  },
   "time": {
     "today": "今天",
     "yesterday": "昨天"
@@ -135,4 +147,4 @@
     "sendMessageFailed": "发送消息失败，请重试",
     "createSessionFailed": "创建会话失败，请刷新页面重试"
   }
-} 
\ No newline at end of file
+} 
diff --git a/dashboard/src/stores/chatSearch.ts b/dashboard/src/stores/chatSearch.ts
new file mode 100644
index 000000000..7d0818f9e
--- /dev/null
+++ b/dashboard/src/stores/chatSearch.ts
@@ -0,0 +1,112 @@
+import { defineStore } from 'pinia';
+import { ref } from 'vue';
+import axios from 'axios';
+
+export interface ChatSearchResult {
+    session_id: string;
+    title: string | null;
+    match_field: 'title' | 'content';
+    match_index: number;
+    match_length: number;
+    snippet: string;
+    snippet_start: number;
+    created_at: string;
+    updated_at: string;
+}
+
+interface ChatSearchPagination {
+    page: number;
+    page_size: number;
+    total: number;
+    total_pages: number;
+}
+
+const defaultPagination: ChatSearchPagination = {
+    page: 1,
+    page_size: 10,
+    total: 0,
+    total_pages: 1
+};
+
+export const useChatSearchStore = defineStore('chatSearch', () => {
+    const active = ref(false);
+    const query = ref('');
+    const results = ref<ChatSearchResult[]>([]);
+    const pagination = ref<ChatSearchPagination>({ ...defaultPagination });
+    const isLoading = ref(false);
+    const searchPerformed = ref(false);
+    const contextLength = ref(40);
+
+    function openSearch() {
+        active.value = true;
+    }
+
+    function closeSearch() {
+        active.value = false;
+    }
+
+    async function search() {
+        const trimmedQuery = query.value.trim();
+        if (!trimmedQuery) {
+            results.value = [];
+            pagination.value = { ...defaultPagination };
+            searchPerformed.value = false;
+            return;
+        }
+
+        searchPerformed.value = true;
+        isLoading.value = true;
+
+        try {
+            const response = await axios.get('/api/chat/search', {
+                params: {
+                    query: trimmedQuery,
+                    page: pagination.value.page,
+                    page_size: pagination.value.page_size,
+                    context: contextLength.value
+                }
+            });
+
+            const data = response.data?.data || {};
+            results.value = data.results || [];
+            pagination.value = data.pagination || { ...defaultPagination };
+        } catch (error) {
+            console.error('Search sessions failed:', error);
+            results.value = [];
+        } finally {
+            isLoading.value = false;
+        }
+    }
+
+    async function setPage(page: number) {
+        pagination.value.page = page;
+        await search();
+    }
+
+    async function setPageSize(pageSize: number) {
+        pagination.value.page_size = pageSize;
+        pagination.value.page = 1;
+        await search();
+    }
+
+    async function runNewSearch() {
+        pagination.value.page = 1;
+        await search();
+    }
+
+    return {
+        active,
+        query,
+        results,
+        pagination,
+        isLoading,
+        searchPerformed,
+        contextLength,
+        openSearch,
+        closeSearch,
+        search,
+        setPage,
+        setPageSize,
+        runNewSearch
+    };
+});