diff --git a/packages/client/src/App.vue b/packages/client/src/App.vue
index 6fcfcd99..f5d58f0b 100644
--- a/packages/client/src/App.vue
+++ b/packages/client/src/App.vue
@@ -7,6 +7,7 @@ import { useTheme } from '@/composables/useTheme'
 import AppSidebar from '@/components/layout/AppSidebar.vue'
 import { useKeyboard } from '@/composables/useKeyboard'
 import { useAppStore } from '@/stores/hermes/app'
+import SessionSearchModal from '@/components/hermes/chat/SessionSearchModal.vue'
 
 const { isDark } = useTheme()
 const appStore = useAppStore()
@@ -58,6 +59,7 @@ useKeyboard()
               <router-view />
             </main>
           </div>
+          <SessionSearchModal />
         </NNotificationProvider>
       </NDialogProvider>
     </NMessageProvider>
diff --git a/packages/client/src/api/hermes/sessions.ts b/packages/client/src/api/hermes/sessions.ts
index 1201ac12..240477b4 100644
--- a/packages/client/src/api/hermes/sessions.ts
+++ b/packages/client/src/api/hermes/sessions.ts
@@ -5,6 +5,7 @@ export interface SessionSummary {
   source: string
   model: string
   title: string | null
+  preview?: string
   started_at: number
   ended_at: number | null
   last_active?: number
@@ -25,6 +26,12 @@ export interface SessionDetail extends SessionSummary {
   messages: HermesMessage[]
 }
 
+export interface SessionSearchResult extends SessionSummary {
+  matched_message_id: number | null
+  snippet: string
+  rank: number
+}
+
 export interface HermesMessage {
   id: number
   session_id: string
@@ -48,6 +55,16 @@ export async function fetchSessions(source?: string, limit?: number): Promise<Se
   return res.sessions
 }
 
+export async function searchSessions(q: string, source?: string, limit?: number): Promise<SessionSearchResult[]> {
+  const params = new URLSearchParams()
+  params.set('q', q)
+  if (source) params.set('source', source)
+  if (limit) params.set('limit', String(limit))
+  const query = params.toString()
+  const res = await request<{ results: SessionSearchResult[] }>(`/api/hermes/search/sessions?${query}`)
+  return res.results
+}
+
 export async function fetchSession(id: string): Promise<SessionDetail | null> {
   try {
     const res = await request<{ session: SessionDetail }>(`/api/hermes/sessions/${id}`)
diff --git a/packages/client/src/components/hermes/chat/MessageItem.vue b/packages/client/src/components/hermes/chat/MessageItem.vue
index ffd6a19d..b23adcae 100644
--- a/packages/client/src/components/hermes/chat/MessageItem.vue
+++ b/packages/client/src/components/hermes/chat/MessageItem.vue
@@ -11,7 +11,7 @@ import {
 
 const TOOL_PAYLOAD_DISPLAY_LIMIT = 2000;
 
-const props = defineProps<{ message: Message }>();
+const props = defineProps<{ message: Message; highlight?: boolean }>();
 const { t } = useI18n();
 
 const isSystem = computed(() => props.message.role === "system");
@@ -126,7 +126,11 @@ const renderedToolResult = computed(() => {
 </script>
 
 <template>
-  <div class="message" :class="[message.role]">
+  <div
+    class="message"
+    :class="[message.role, { highlight }]"
+    :id="`message-${message.id}`"
+  >
     <template v-if="message.role === 'tool'">
       <div
         class="tool-line"
@@ -306,6 +310,12 @@ const renderedToolResult = computed(() => {
       background-color: rgba(var(--warning-rgb), 0.06);
     }
   }
+
+  &.highlight {
+    .message-bubble {
+      box-shadow: 0 0 0 1px rgba(var(--accent-primary-rgb), 0.45);
+    }
+  }
 }
 
 .msg-body {
diff --git a/packages/client/src/components/hermes/chat/MessageList.vue b/packages/client/src/components/hermes/chat/MessageList.vue
index f75f5954..00a8d073 100644
--- a/packages/client/src/components/hermes/chat/MessageList.vue
+++ b/packages/client/src/components/hermes/chat/MessageList.vue
@@ -45,15 +45,37 @@ function scrollToBottom() {
   });
 }
 
+function scrollToMessage(messageId: string) {
+  nextTick(() => {
+    const el = document.getElementById(`message-${messageId}`);
+    if (el) {
+      el.scrollIntoView({ block: 'center' });
+    }
+  });
+}
+
 // Scroll to bottom once when messages are first loaded
 watch(
   () => chatStore.activeSessionId,
   (id) => {
-    if (id) scrollToBottom();
+    if (!id) return;
+    if (chatStore.focusMessageId) {
+      scrollToMessage(chatStore.focusMessageId);
+      return;
+    }
+    scrollToBottom();
   },
   { immediate: true },
 );
 
+watch(
+  () => chatStore.focusMessageId,
+  (messageId) => {
+    if (!messageId) return;
+    scrollToMessage(messageId);
+  },
+);
+
 // When a run starts (user just sent a message), always scroll to bottom once
 watch(
   () => chatStore.isRunActive,
@@ -66,12 +88,20 @@ watch(
 watch(
   () => chatStore.messages[chatStore.messages.length - 1]?.content,
   () => {
+    if (chatStore.focusMessageId) {
+      scrollToMessage(chatStore.focusMessageId);
+      return;
+    }
     if (!chatStore.isStreaming) { scrollToBottom(); return; }
     if (!isNearBottom()) return;
     scrollToBottom();
   },
 );
 watch(currentToolCalls, () => {
+  if (chatStore.focusMessageId) {
+    scrollToMessage(chatStore.focusMessageId);
+    return;
+  }
   if (!chatStore.isStreaming) { scrollToBottom(); return; }
   if (!isNearBottom()) return;
   scrollToBottom();
@@ -84,7 +114,12 @@ watch(currentToolCalls, () => {
       <img src="/logo.png" alt="Hermes" class="empty-logo" />
       <p>{{ t("chat.emptyState") }}</p>
     </div>
-    <MessageItem v-for="msg in displayMessages" :key="msg.id" :message="msg" />
+    <MessageItem
+      v-for="msg in displayMessages"
+      :key="msg.id"
+      :message="msg"
+      :highlight="chatStore.focusMessageId === msg.id"
+    />
     <Transition name="fade">
       <div v-if="chatStore.isRunActive" class="streaming-indicator">
         <video
diff --git a/packages/client/src/components/hermes/chat/SessionSearchModal.vue b/packages/client/src/components/hermes/chat/SessionSearchModal.vue
new file mode 100644
index 00000000..49d45610
--- /dev/null
+++ b/packages/client/src/components/hermes/chat/SessionSearchModal.vue
@@ -0,0 +1,435 @@
+<script setup lang="ts">
+import { computed, nextTick, onMounted, onUnmounted, ref, watch } from 'vue'
+import { useRouter } from 'vue-router'
+import { NButton, NInput, NModal, NSpin, useMessage } from 'naive-ui'
+import { useI18n } from 'vue-i18n'
+import { fetchSessions, searchSessions, type SessionSearchResult, type SessionSummary } from '@/api/hermes/sessions'
+import { useChatStore } from '@/stores/hermes/chat'
+import { useSessionSearch } from '@/composables/useSessionSearch'
+
+const { t } = useI18n()
+const message = useMessage()
+const router = useRouter()
+const chatStore = useChatStore()
+const { sessionSearchOpen } = useSessionSearch()
+
+const query = ref('')
+const loading = ref(false)
+const recentSessions = ref<SessionSummary[]>([])
+const searchResults = ref<SessionSearchResult[]>([])
+const activeIndex = ref(0)
+const inputRef = ref<InstanceType<typeof NInput> | null>(null)
+
+let debounceTimer: ReturnType<typeof setTimeout> | null = null
+let requestSeq = 0
+
+type SearchItem = SessionSearchResult | (SessionSummary & {
+  snippet?: string
+  matched_message_id: number | null
+  rank: number
+})
+
+const hasQuery = computed(() => query.value.trim().length > 0)
+
+const items = computed<SearchItem[]>(() => {
+  if (hasQuery.value) return searchResults.value
+  return recentSessions.value.map(session => ({
+    ...session,
+    matched_message_id: null,
+    snippet: session.preview || '',
+    rank: 0,
+  }))
+})
+
+function formatSource(source: string): string {
+  const map: Record<string, string> = {
+    api_server: 'API Server',
+    cli: 'CLI',
+    telegram: 'Telegram',
+    discord: 'Discord',
+    slack: 'Slack',
+    matrix: 'Matrix',
+    whatsapp: 'WhatsApp',
+    signal: 'Signal',
+    cron: 'Cron',
+    weixin: 'WeChat',
+  }
+  return map[source] || source
+}
+
+function formatTime(ts?: number): string {
+  if (!ts) return ''
+  const date = new Date(ts * 1000)
+  return date.toLocaleString([], {
+    month: 'short',
+    day: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+  })
+}
+
+function getItemTitle(item: SearchItem): string {
+  const title = item.title?.trim()
+  if (title) return title
+  if (item.preview?.trim()) return item.preview.trim()
+  return item.id
+}
+
+async function loadRecentSessions() {
+  const seq = ++requestSeq
+  loading.value = true
+  try {
+    const sessions = await fetchSessions(undefined, 8)
+    if (seq !== requestSeq) return
+    recentSessions.value = sessions
+    searchResults.value = []
+    activeIndex.value = 0
+  } catch (err) {
+    if (seq !== requestSeq) return
+    message.error(err instanceof Error ? err.message : t('chat.searchFailed'))
+  } finally {
+    if (seq === requestSeq) {
+      loading.value = false
+    }
+  }
+}
+
+async function runSearch(text: string) {
+  const seq = ++requestSeq
+  loading.value = true
+  try {
+    const results = text.trim()
+      ? await searchSessions(text.trim(), undefined, 10)
+      : []
+    if (seq !== requestSeq) return
+    searchResults.value = results
+    activeIndex.value = 0
+  } catch (err) {
+    if (seq !== requestSeq) return
+    message.error(err instanceof Error ? err.message : t('chat.searchFailed'))
+  } finally {
+    if (seq === requestSeq) {
+      loading.value = false
+    }
+  }
+}
+
+async function ensureChatSessionsLoaded() {
+  if (chatStore.sessions.length === 0) {
+    await chatStore.loadSessions()
+  }
+}
+
+async function openItem(item: SearchItem) {
+  const messageId = item.matched_message_id != null ? String(item.matched_message_id) : null
+  sessionSearchOpen.value = false
+
+  await ensureChatSessionsLoaded()
+  await chatStore.switchSession(item.id, messageId)
+  if (router.currentRoute.value.name !== 'hermes.chat') {
+    await router.push({ name: 'hermes.chat' })
+  }
+}
+
+function closeModal() {
+  sessionSearchOpen.value = false
+}
+
+function moveSelection(delta: number) {
+  const list = items.value
+  if (list.length === 0) return
+  const next = activeIndex.value + delta
+  activeIndex.value = (next + list.length) % list.length
+}
+
+async function handleKeydown(e: KeyboardEvent) {
+  if (!sessionSearchOpen.value) return
+  if (e.key === 'ArrowDown') {
+    e.preventDefault()
+    moveSelection(1)
+    return
+  }
+  if (e.key === 'ArrowUp') {
+    e.preventDefault()
+    moveSelection(-1)
+    return
+  }
+  if (e.key === 'Enter') {
+    e.preventDefault()
+    const item = items.value[activeIndex.value]
+    if (item) {
+      await openItem(item)
+    }
+    return
+  }
+  if (e.key === 'Escape') {
+    e.preventDefault()
+    closeModal()
+  }
+}
+
+watch(
+  () => sessionSearchOpen.value,
+  async (open) => {
+    if (!open) {
+      query.value = ''
+      searchResults.value = []
+      recentSessions.value = []
+      activeIndex.value = 0
+      return
+    }
+
+    query.value = ''
+    searchResults.value = []
+    activeIndex.value = 0
+    await loadRecentSessions()
+    await nextTick()
+    inputRef.value?.focus?.()
+  },
+)
+
+watch(query, (value) => {
+  if (debounceTimer) {
+    clearTimeout(debounceTimer)
+    debounceTimer = null
+  }
+  debounceTimer = setTimeout(() => {
+    if (!sessionSearchOpen.value) return
+    void runSearch(value)
+  }, 160)
+})
+
+watch(items, () => {
+  if (activeIndex.value >= items.value.length) {
+    activeIndex.value = 0
+  }
+})
+
+onMounted(() => {
+  window.addEventListener('keydown', handleKeydown)
+})
+
+onUnmounted(() => {
+  window.removeEventListener('keydown', handleKeydown)
+  if (debounceTimer) {
+    clearTimeout(debounceTimer)
+  }
+})
+</script>
+
+<template>
+  <NModal
+    v-model:show="sessionSearchOpen"
+    preset="card"
+    :title="t('chat.searchTitle')"
+    :style="{ width: 'min(760px, calc(100vw - 24px))' }"
+    :mask-closable="true"
+    :auto-focus="false"
+  >
+    <div class="session-search-modal">
+      <div class="search-header">
+        <div class="search-title">{{ t('chat.searchSubtitle') }}</div>
+        <div class="search-hint">{{ t('chat.searchHint') }}</div>
+      </div>
+
+      <NInput
+        ref="inputRef"
+      v-model:value="query"
+      :placeholder="t('chat.searchPlaceholder')"
+      clearable
+      size="large"
+    />
+
+      <div class="search-body">
+        <NSpin :show="loading">
+          <div v-if="items.length === 0" class="search-empty">
+            {{ hasQuery ? t('chat.searchNoResults') : t('chat.searchEmpty') }}
+          </div>
+          <div v-else class="result-list">
+            <button
+              v-for="(item, idx) in items"
+              :key="item.id"
+              class="result-item"
+              :class="{ active: idx === activeIndex }"
+              @click="openItem(item)"
+              @mouseenter="activeIndex = idx"
+            >
+              <div class="result-main">
+                <div class="result-title-row">
+                  <span class="result-title">{{ getItemTitle(item) }}</span>
+                  <span class="result-source">{{ formatSource(item.source) }}</span>
+                </div>
+                <div class="result-snippet">
+                  {{ hasQuery ? item.snippet || t('chat.searchNoSnippet') : item.preview || t('chat.searchRecent') }}
+                </div>
+              </div>
+              <div class="result-meta">
+                <span class="result-time">{{ formatTime(item.last_active || item.started_at) }}</span>
+                <span v-if="hasQuery && item.matched_message_id != null" class="result-match">
+                  #{{ item.matched_message_id }}
+                </span>
+              </div>
+            </button>
+          </div>
+        </NSpin>
+      </div>
+
+      <div class="search-footer">
+        <span>{{ t('chat.searchEnterHint') }}</span>
+        <NButton quaternary size="small" @click="closeModal">{{ t('common.cancel') }}</NButton>
+      </div>
+    </div>
+  </NModal>
+</template>
+
+<style scoped lang="scss">
+@use '@/styles/variables' as *;
+
+.session-search-modal {
+  display: flex;
+  flex-direction: column;
+  gap: 14px;
+}
+
+.search-header {
+  display: flex;
+  align-items: baseline;
+  justify-content: space-between;
+  gap: 12px;
+}
+
+.search-title {
+  font-size: 14px;
+  font-weight: 600;
+  color: $text-primary;
+}
+
+.search-hint {
+  font-size: 12px;
+  color: $text-muted;
+}
+
+.search-body {
+  max-height: min(60vh, 540px);
+  overflow: hidden;
+}
+
+.search-empty {
+  padding: 28px 0;
+  text-align: center;
+  color: $text-muted;
+  font-size: 13px;
+}
+
+.result-list {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  max-height: min(60vh, 540px);
+  overflow-y: auto;
+  padding-right: 2px;
+}
+
+.result-item {
+  width: 100%;
+  display: flex;
+  justify-content: space-between;
+  gap: 16px;
+  padding: 12px 14px;
+  border: 1px solid $border-color;
+  border-radius: $radius-md;
+  background: $bg-card;
+  color: $text-primary;
+  text-align: left;
+  cursor: pointer;
+  transition: border-color $transition-fast, background-color $transition-fast, transform $transition-fast;
+
+  &:hover,
+  &.active {
+    border-color: $accent-muted;
+    background: rgba(var(--accent-primary-rgb), 0.04);
+  }
+}
+
+.result-main {
+  flex: 1;
+  min-width: 0;
+}
+
+.result-title-row {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.result-title {
+  font-size: 13px;
+  font-weight: 600;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.result-source {
+  flex-shrink: 0;
+  font-size: 11px;
+  color: $text-muted;
+}
+
+.result-snippet {
+  margin-top: 4px;
+  font-size: 12px;
+  color: $text-secondary;
+  line-height: 1.5;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+}
+
+.result-meta {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-end;
+  gap: 4px;
+  font-size: 11px;
+  color: $text-muted;
+  flex-shrink: 0;
+}
+
+.result-match {
+  font-family: $font-code;
+}
+
+.search-footer {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  font-size: 12px;
+  color: $text-muted;
+}
+
+@media (max-width: $breakpoint-mobile) {
+  :deep(.n-modal-body-wrapper) {
+    width: calc(100vw - 24px);
+  }
+
+  .search-header {
+    flex-direction: column;
+    align-items: flex-start;
+  }
+
+  .result-item {
+    flex-direction: column;
+    align-items: flex-start;
+  }
+
+  .result-meta {
+    align-items: flex-start;
+    flex-direction: row;
+    flex-wrap: wrap;
+  }
+}
+</style>
diff --git a/packages/client/src/components/layout/AppSidebar.vue b/packages/client/src/components/layout/AppSidebar.vue
index 4476d166..b2f6a6a0 100644
--- a/packages/client/src/components/layout/AppSidebar.vue
+++ b/packages/client/src/components/layout/AppSidebar.vue
@@ -8,6 +8,7 @@ import ModelSelector from "./ModelSelector.vue";
 import ProfileSelector from "./ProfileSelector.vue";
 import LanguageSwitch from "./LanguageSwitch.vue";
 import ThemeSwitch from "./ThemeSwitch.vue";
+import { useSessionSearch } from '@/composables/useSessionSearch'
 import danceVideoLight from "@/assets/dance-light.mp4";
 import danceVideoDark from "@/assets/dance-dark.mp4";
 
@@ -19,7 +20,9 @@ const message = useMessage();
 const route = useRoute();
 const router = useRouter();
 const appStore = useAppStore();
+const { openSessionSearch } = useSessionSearch();
 const selectedKey = computed(() => route.name as string);
+const logoPath = '/logo.png';
 
 const collapsedGroups = reactive<Record<string, boolean>>({});
 
@@ -48,7 +51,7 @@ async function handleUpdate() {
 <template>
   <aside class="sidebar" :class="{ open: appStore.sidebarOpen }">
     <div class="sidebar-logo" @click="router.push('/hermes/chat')">
-      <img src="/logo.png" alt="Hermes" class="logo-img" />
+      <img :src="logoPath" alt="Hermes" class="logo-img" />
       <span class="logo-text">Hermes</span>
       <video class="logo-dance" :src="isDark ? danceVideoDark : danceVideoLight" autoplay loop muted playsinline />
     </div>
@@ -62,6 +65,14 @@ async function handleUpdate() {
         <span>{{ t("sidebar.chat") }}</span>
       </button>
 
+      <button class="nav-item" @click="openSessionSearch">
+        <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round">
+          <circle cx="11" cy="11" r="7" />
+          <path d="m20 20-3.5-3.5" />
+        </svg>
+        <span>{{ t("sidebar.search") }}</span>
+      </button>
+
       <!-- Agent -->
       <div class="nav-group">
         <div class="nav-group-label" @click="toggleGroup('agent')">
diff --git a/packages/client/src/composables/useKeyboard.ts b/packages/client/src/composables/useKeyboard.ts
index 77bdbb73..7f78987e 100644
--- a/packages/client/src/composables/useKeyboard.ts
+++ b/packages/client/src/composables/useKeyboard.ts
@@ -1,10 +1,12 @@
 import { onMounted, onUnmounted } from 'vue'
 import { useRouter } from 'vue-router'
 import { useChatStore } from '@/stores/hermes/chat'
+import { useSessionSearch } from './useSessionSearch'
 
 export function useKeyboard() {
   const router = useRouter()
   const chatStore = useChatStore()
+  const { sessionSearchOpen, openSessionSearch, closeSessionSearch } = useSessionSearch()
 
   function handleKeydown(e: KeyboardEvent) {
     const mod = e.ctrlKey || e.metaKey
@@ -12,14 +14,28 @@ export function useKeyboard() {
     if (mod && e.key === 'n') {
       e.preventDefault()
       chatStore.newChat()
+      return
     }
 
     if (mod && e.key === 'j') {
       e.preventDefault()
       router.push({ name: 'hermes.jobs' })
+      return
+    }
+
+    if (mod && e.key.toLowerCase() === 'k') {
+      if (router.currentRoute.value.name === 'login') return
+      e.preventDefault()
+      openSessionSearch()
+      return
     }
 
     if (e.key === 'Escape') {
+      if (sessionSearchOpen.value) {
+        e.preventDefault()
+        closeSessionSearch()
+        return
+      }
       // Close any open modals — naive-ui handles this internally
       const modal = document.querySelector('.n-modal-mask')
       if (modal) {
diff --git a/packages/client/src/composables/useSessionSearch.ts b/packages/client/src/composables/useSessionSearch.ts
new file mode 100644
index 00000000..2c467262
--- /dev/null
+++ b/packages/client/src/composables/useSessionSearch.ts
@@ -0,0 +1,19 @@
+import { ref } from 'vue'
+
+const sessionSearchOpen = ref(false)
+
+export function useSessionSearch() {
+  function openSessionSearch() {
+    sessionSearchOpen.value = true
+  }
+
+  function closeSessionSearch() {
+    sessionSearchOpen.value = false
+  }
+
+  return {
+    sessionSearchOpen,
+    openSessionSearch,
+    closeSessionSearch,
+  }
+}
diff --git a/packages/client/src/i18n/locales/en.ts b/packages/client/src/i18n/locales/en.ts
index bc55a858..84ddcd23 100644
--- a/packages/client/src/i18n/locales/en.ts
+++ b/packages/client/src/i18n/locales/en.ts
@@ -42,6 +42,7 @@ export default {
   // Sidebar
   sidebar: {
     chat: 'Chat',
+    search: 'Search',
     jobs: 'Jobs',
     models: 'Models',
     profiles: 'Profiles',
@@ -82,6 +83,16 @@ export default {
     contextUsed: 'Context used:',
     sessions: 'Sessions',
     noSessions: 'No sessions',
+    searchTitle: 'Search Sessions',
+    searchSubtitle: 'Search by title or message content',
+    searchHint: 'Cmd/Ctrl+K',
+    searchPlaceholder: 'Search sessions...',
+    searchEmpty: 'Recent sessions',
+    searchRecent: 'Recent session',
+    searchNoResults: 'No sessions match your search',
+    searchNoSnippet: 'No snippet available',
+    searchEnterHint: 'Enter to open · Esc to close',
+    searchFailed: 'Failed to search sessions',
     newChat: 'New Chat',
     deleteSession: 'Delete this session?',
     sessionDeleted: 'Session deleted',
diff --git a/packages/client/src/i18n/locales/zh.ts b/packages/client/src/i18n/locales/zh.ts
index a103fceb..84bf1acd 100644
--- a/packages/client/src/i18n/locales/zh.ts
+++ b/packages/client/src/i18n/locales/zh.ts
@@ -42,6 +42,7 @@ export default {
   // 侧边栏
   sidebar: {
     chat: '对话',
+    search: '搜索',
     jobs: '任务',
     models: '模型',
     profiles: '用户',
@@ -82,6 +83,16 @@ export default {
     contextUsed: '上下文已用:',
     sessions: '会话',
     noSessions: '暂无会话',
+    searchTitle: '搜索会话',
+    searchSubtitle: '按标题或消息内容搜索',
+    searchHint: 'Cmd/Ctrl+K',
+    searchPlaceholder: '搜索会话...',
+    searchEmpty: '最近会话',
+    searchRecent: '最近会话',
+    searchNoResults: '没有匹配的会话',
+    searchNoSnippet: '没有可显示的摘要',
+    searchEnterHint: 'Enter 打开 · Esc 关闭',
+    searchFailed: '搜索会话失败',
     newChat: '新建对话',
     deleteSession: '确定删除此会话？',
     sessionDeleted: '会话已删除',
diff --git a/packages/client/src/stores/hermes/chat.ts b/packages/client/src/stores/hermes/chat.ts
index 8e0ebde4..e8645d7c 100644
--- a/packages/client/src/stores/hermes/chat.ts
+++ b/packages/client/src/stores/hermes/chat.ts
@@ -231,6 +231,7 @@ function sanitizeForCache(msgs: Message[]): Message[] {
 export const useChatStore = defineStore('chat', () => {
   const sessions = ref<Session[]>([])
   const activeSessionId = ref<string | null>(null)
+  const focusMessageId = ref<string | null>(null)
   const streamStates = ref<Map<string, AbortController>>(new Map())
   const isStreaming = computed(() => activeSessionId.value != null && streamStates.value.has(activeSessionId.value))
   const isLoadingSessions = ref(false)
@@ -474,8 +475,9 @@ export const useChatStore = defineStore('chat', () => {
     return session
   }
 
-  async function switchSession(sessionId: string) {
+  async function switchSession(sessionId: string, focusId?: string | null) {
     activeSessionId.value = sessionId
+    focusMessageId.value = focusId ?? null
     localStorage.setItem(storageKey(), sessionId)
     activeSession.value = sessions.value.find(s => s.id === sessionId) || null
 
@@ -915,6 +917,7 @@ export const useChatStore = defineStore('chat', () => {
     sessions,
     activeSessionId,
     activeSession,
+    focusMessageId,
     messages,
     isStreaming,
     isRunActive,
diff --git a/packages/server/src/controllers/hermes/sessions.ts b/packages/server/src/controllers/hermes/sessions.ts
index eec1781f..64251704 100644
--- a/packages/server/src/controllers/hermes/sessions.ts
+++ b/packages/server/src/controllers/hermes/sessions.ts
@@ -1,6 +1,6 @@
 import * as hermesCli from '../../services/hermes/hermes-cli'
 import { getConversationDetail, listConversationSummaries } from '../../services/hermes/conversations'
-import { listSessionSummaries } from '../../services/hermes/sessions-db'
+import { listSessionSummaries, searchSessionSummaries } from '../../services/hermes/sessions-db'
 import { logger } from '../../services/logger'
 
 function parseHumanOnly(value: unknown): boolean {
@@ -50,6 +50,23 @@ export async function list(ctx: any) {
   ctx.body = { sessions }
 }
 
+export async function search(ctx: any) {
+  const q = typeof ctx.query.q === 'string' ? ctx.query.q : ''
+  const source = typeof ctx.query.source === 'string' && ctx.query.source.trim()
+    ? ctx.query.source.trim()
+    : undefined
+  const limit = ctx.query.limit ? parseInt(ctx.query.limit as string, 10) : undefined
+
+  try {
+    const results = await searchSessionSummaries(q, source, limit && limit > 0 ? limit : 20)
+    ctx.body = { results }
+  } catch (err) {
+    logger.error(err, 'Hermes Session DB: search failed')
+    ctx.status = 500
+    ctx.body = { error: 'Failed to search sessions' }
+  }
+}
+
 export async function get(ctx: any) {
   const session = await hermesCli.getSession(ctx.params.id)
   if (!session) {
diff --git a/packages/server/src/routes/hermes/sessions.ts b/packages/server/src/routes/hermes/sessions.ts
index 66fb3899..85eba04a 100644
--- a/packages/server/src/routes/hermes/sessions.ts
+++ b/packages/server/src/routes/hermes/sessions.ts
@@ -6,6 +6,8 @@ export const sessionRoutes = new Router()
 sessionRoutes.get('/api/hermes/sessions/conversations', ctrl.listConversations)
 sessionRoutes.get('/api/hermes/sessions/conversations/:id/messages', ctrl.getConversationMessages)
 sessionRoutes.get('/api/hermes/sessions', ctrl.list)
+sessionRoutes.get('/api/hermes/search/sessions', ctrl.search)
+sessionRoutes.get('/api/hermes/sessions/search', ctrl.search)
 sessionRoutes.get('/api/hermes/sessions/:id', ctrl.get)
 sessionRoutes.delete('/api/hermes/sessions/:id', ctrl.remove)
 sessionRoutes.post('/api/hermes/sessions/:id/rename', ctrl.rename)
diff --git a/packages/server/src/services/hermes/sessions-db.ts b/packages/server/src/services/hermes/sessions-db.ts
index 1291d648..82147a7f 100644
--- a/packages/server/src/services/hermes/sessions-db.ts
+++ b/packages/server/src/services/hermes/sessions-db.ts
@@ -29,6 +29,12 @@ export interface HermesSessionRow {
   last_active: number
 }
 
+export interface HermesSessionSearchRow extends HermesSessionRow {
+  matched_message_id: number | null
+  snippet: string
+  rank: number
+}
+
 function sessionDbPath(): string {
   return `${getActiveProfileDir()}/state.db`
 }
@@ -81,43 +87,122 @@ function mapRow(row: Record<string, unknown>): HermesSessionRow {
   }
 }
 
-const BASE_SELECT = `
-  SELECT
-    s.id,
-    s.source,
-    COALESCE(s.user_id, '') AS user_id,
-    COALESCE(s.model, '') AS model,
-    COALESCE(s.title, '') AS title,
-    COALESCE(s.started_at, 0) AS started_at,
-    s.ended_at AS ended_at,
-    COALESCE(s.end_reason, '') AS end_reason,
-    COALESCE(s.message_count, 0) AS message_count,
-    COALESCE(s.tool_call_count, 0) AS tool_call_count,
-    COALESCE(s.input_tokens, 0) AS input_tokens,
-    COALESCE(s.output_tokens, 0) AS output_tokens,
-    COALESCE(s.cache_read_tokens, 0) AS cache_read_tokens,
-    COALESCE(s.cache_write_tokens, 0) AS cache_write_tokens,
-    COALESCE(s.reasoning_tokens, 0) AS reasoning_tokens,
-    COALESCE(s.billing_provider, '') AS billing_provider,
-    COALESCE(s.estimated_cost_usd, 0) AS estimated_cost_usd,
-    s.actual_cost_usd AS actual_cost_usd,
-    COALESCE(s.cost_status, '') AS cost_status,
-    COALESCE(
-      (
-        SELECT SUBSTR(REPLACE(REPLACE(m.content, CHAR(10), ' '), CHAR(13), ' '), 1, 63)
-        FROM messages m
-        WHERE m.session_id = s.id AND m.role = 'user' AND m.content IS NOT NULL
-        ORDER BY m.timestamp, m.id
-        LIMIT 1
-      ),
-      ''
-    ) AS preview,
-    COALESCE((SELECT MAX(m2.timestamp) FROM messages m2 WHERE m2.session_id = s.id), s.started_at) AS last_active
+const SESSION_SELECT = `
+  s.id,
+  s.source,
+  COALESCE(s.user_id, '') AS user_id,
+  COALESCE(s.model, '') AS model,
+  COALESCE(s.title, '') AS title,
+  COALESCE(s.started_at, 0) AS started_at,
+  s.ended_at AS ended_at,
+  COALESCE(s.end_reason, '') AS end_reason,
+  COALESCE(s.message_count, 0) AS message_count,
+  COALESCE(s.tool_call_count, 0) AS tool_call_count,
+  COALESCE(s.input_tokens, 0) AS input_tokens,
+  COALESCE(s.output_tokens, 0) AS output_tokens,
+  COALESCE(s.cache_read_tokens, 0) AS cache_read_tokens,
+  COALESCE(s.cache_write_tokens, 0) AS cache_write_tokens,
+  COALESCE(s.reasoning_tokens, 0) AS reasoning_tokens,
+  COALESCE(s.billing_provider, '') AS billing_provider,
+  COALESCE(s.estimated_cost_usd, 0) AS estimated_cost_usd,
+  s.actual_cost_usd AS actual_cost_usd,
+  COALESCE(s.cost_status, '') AS cost_status,
+  COALESCE(
+    (
+      SELECT SUBSTR(REPLACE(REPLACE(m.content, CHAR(10), ' '), CHAR(13), ' '), 1, 63)
+      FROM messages m
+      WHERE m.session_id = s.id AND m.role = 'user' AND m.content IS NOT NULL
+      ORDER BY m.timestamp, m.id
+      LIMIT 1
+    ),
+    ''
+  ) AS preview,
+  COALESCE((SELECT MAX(m2.timestamp) FROM messages m2 WHERE m2.session_id = s.id), s.started_at) AS last_active
+`
+
+const SESSION_FROM = `
   FROM sessions s
   WHERE s.parent_session_id IS NULL
     AND s.source != 'tool'
 `
 
+function buildBaseSessionSql(source?: string): { sql: string, params: any[] } {
+  const sql = source
+    ? `SELECT ${SESSION_SELECT}${SESSION_FROM}\n    AND s.source = ?`
+    : `SELECT ${SESSION_SELECT}${SESSION_FROM}`
+  return { sql, params: source ? [source] : [] }
+}
+
+function buildListSessionSql(source?: string, limit = 2000): { sql: string, params: any[] } {
+  const base = buildBaseSessionSql(source)
+  return {
+    sql: `${base.sql}\n  ORDER BY s.started_at DESC\n  LIMIT ?`,
+    params: [...base.params, limit],
+  }
+}
+
+function containsCjk(text: string): boolean {
+  for (const ch of text) {
+    const cp = ch.codePointAt(0) ?? 0
+    if (
+      (cp >= 0x4E00 && cp <= 0x9FFF) ||
+      (cp >= 0x3400 && cp <= 0x4DBF) ||
+      (cp >= 0x20000 && cp <= 0x2A6DF) ||
+      (cp >= 0x3000 && cp <= 0x303F) ||
+      (cp >= 0x3040 && cp <= 0x309F) ||
+      (cp >= 0x30A0 && cp <= 0x30FF) ||
+      (cp >= 0xAC00 && cp <= 0xD7AF)
+    ) {
+      return true
+    }
+  }
+  return false
+}
+
+function sanitizeFtsQuery(query: string): string {
+  const quotedParts: string[] = []
+
+  const preserved = query.replace(/"[^"]*"/g, (match) => {
+    quotedParts.push(match)
+    return `\u0000Q${quotedParts.length - 1}\u0000`
+  })
+
+  let sanitized = preserved.replace(/[+{}()"^]/g, ' ')
+  sanitized = sanitized.replace(/\*+/g, '*')
+  sanitized = sanitized.replace(/(^|\s)\*/g, '$1')
+  sanitized = sanitized.trim().replace(/^(AND|OR|NOT)\b\s*/i, '')
+  sanitized = sanitized.trim().replace(/\s+(AND|OR|NOT)\s*$/i, '')
+  sanitized = sanitized.replace(/\b(\w+(?:[.-]\w+)+)\b/g, '"$1"')
+
+  for (let i = 0; i < quotedParts.length; i += 1) {
+    sanitized = sanitized.replace(`\u0000Q${i}\u0000`, quotedParts[i])
+  }
+
+  return sanitized.trim()
+}
+
+function toPrefixQuery(query: string): string {
+  const tokens = query.match(/"[^"]*"|\S+/g)
+  if (!tokens) return ''
+  return tokens
+    .map((token) => {
+      if (token === 'AND' || token === 'OR' || token === 'NOT') return token
+      if (token.startsWith('"') && token.endsWith('"')) return token
+      if (token.endsWith('*')) return token
+      return `${token}*`
+    })
+    .join(' ')
+}
+
+function mapSearchRow(row: Record<string, unknown>): HermesSessionSearchRow {
+  return {
+    ...mapRow(row),
+    matched_message_id: normalizeNullableNumber(row.matched_message_id),
+    snippet: String(row.snippet || row.preview || ''),
+    rank: Number.isFinite(Number(row.rank)) ? Number(row.rank) : 0,
+  }
+}
+
 export async function listSessionSummaries(source?: string, limit = 2000): Promise<HermesSessionRow[]> {
   if (!SQLITE_AVAILABLE) {
     throw new Error(`node:sqlite requires Node >= 22.5, current: ${process.versions.node}`)
@@ -127,17 +212,141 @@ export async function listSessionSummaries(source?: string, limit = 2000): Promi
   const db = new DatabaseSync(sessionDbPath(), { open: true, readOnly: true })
 
   try {
-    const sql = source
-      ? `${BASE_SELECT}\n    AND s.source = ?\n  ORDER BY s.started_at DESC\n  LIMIT ?`
-      : `${BASE_SELECT}\n  ORDER BY s.started_at DESC\n  LIMIT ?`
-
+    const { sql, params } = buildListSessionSql(source, limit)
     const statement = db.prepare(sql)
-    const rows = source
-      ? statement.all(source, limit) as Record<string, unknown>[]
-      : statement.all(limit) as Record<string, unknown>[]
+    const rows = statement.all(...params) as Record<string, unknown>[]
 
     return rows.map(mapRow)
   } finally {
     db.close()
   }
 }
+
+export async function searchSessionSummaries(
+  query: string,
+  source?: string,
+  limit = 20,
+): Promise<HermesSessionSearchRow[]> {
+  if (!SQLITE_AVAILABLE) {
+    throw new Error(`node:sqlite requires Node >= 22.5, current: ${process.versions.node}`)
+  }
+
+  const trimmed = query.trim()
+  if (!trimmed) {
+    const recent = await listSessionSummaries(source, limit)
+    return recent.map(row => ({
+      ...row,
+      matched_message_id: null,
+      snippet: row.preview,
+      rank: 0,
+    }))
+  }
+
+  const { DatabaseSync } = await import('node:sqlite')
+  const db = new DatabaseSync(sessionDbPath(), { open: true, readOnly: true })
+  const normalized = sanitizeFtsQuery(trimmed)
+  const prefixQuery = toPrefixQuery(normalized)
+
+  try {
+    const titleBase = buildBaseSessionSql(source)
+    const contentBase = buildBaseSessionSql(source)
+
+    const titleSql = `
+      WITH base AS (
+        ${titleBase.sql}
+      )
+      SELECT
+        base.*,
+        NULL AS matched_message_id,
+        CASE
+          WHEN base.title IS NOT NULL AND base.title != '' THEN base.title
+          ELSE base.preview
+        END AS snippet,
+        0 AS rank
+      FROM base
+      WHERE LOWER(COALESCE(base.title, '')) LIKE ?
+      ORDER BY base.last_active DESC
+      LIMIT ?
+    `
+
+    const titleStatement = db.prepare(titleSql)
+    const titleRows = titleStatement.all(...titleBase.params, `%${trimmed.toLowerCase()}%`, limit) as Record<string, unknown>[]
+
+    const contentSql = `
+      WITH base AS (
+        ${contentBase.sql}
+      )
+      SELECT
+        base.*,
+        m.id AS matched_message_id,
+        snippet(messages_fts, 0, '>>>', '<<<', '...', 40) AS snippet,
+        bm25(messages_fts) AS rank
+      FROM messages_fts
+      JOIN messages m ON m.id = messages_fts.rowid
+      JOIN base ON base.id = m.session_id
+      WHERE messages_fts MATCH ?
+      ORDER BY rank, base.last_active DESC
+      LIMIT ?
+    `
+
+    const contentRows = prefixQuery
+      ? (db.prepare(contentSql).all(...contentBase.params, prefixQuery, limit * 4) as Record<string, unknown>[])
+      : []
+
+    const merged = new Map<string, HermesSessionSearchRow>()
+    for (const row of titleRows) {
+      const mapped = mapSearchRow(row)
+      merged.set(mapped.id, mapped)
+    }
+    for (const row of contentRows) {
+      const mapped = mapSearchRow(row)
+      if (!merged.has(mapped.id)) {
+        merged.set(mapped.id, mapped)
+      }
+    }
+
+    const items = [...merged.values()]
+    items.sort((a, b) => {
+      if (a.rank !== b.rank) return a.rank - b.rank
+      return b.last_active - a.last_active
+    })
+    return items.slice(0, limit)
+  } catch (err) {
+    if (containsCjk(normalized)) {
+      const likeBase = buildBaseSessionSql(source)
+      const likeSql = `
+        WITH base AS (
+          ${likeBase.sql}
+        )
+        SELECT
+          base.*,
+          m.id AS matched_message_id,
+          substr(
+            m.content,
+            max(1, instr(m.content, ?) - 40),
+            120
+          ) AS snippet,
+          0 AS rank
+        FROM base
+        JOIN messages m ON m.session_id = base.id
+        WHERE m.content LIKE ?
+        ORDER BY base.last_active DESC, m.timestamp DESC
+      `
+      const likeStatement = db.prepare(likeSql)
+      const likeRows = likeStatement.all(...likeBase.params, trimmed, `%${trimmed}%`) as Record<string, unknown>[]
+      const merged = new Map<string, HermesSessionSearchRow>()
+      for (const row of likeRows) {
+        const mapped = mapSearchRow(row)
+        if (!merged.has(mapped.id)) {
+          merged.set(mapped.id, mapped)
+        }
+      }
+      return [...merged.values()].slice(0, limit)
+    }
+
+    const message = err instanceof Error ? err.message : String(err)
+    throw new Error(`Failed to search sessions: ${message}`)
+  } finally {
+    db.close()
+  }
+}
diff --git a/tests/client/session-search.test.ts b/tests/client/session-search.test.ts
new file mode 100644
index 00000000..7a1fdac3
--- /dev/null
+++ b/tests/client/session-search.test.ts
@@ -0,0 +1,211 @@
+// @vitest-environment jsdom
+import { nextTick, defineComponent, h } from 'vue'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { mount } from '@vue/test-utils'
+
+const apiMocks = vi.hoisted(() => ({
+  fetchSessionsMock: vi.fn(),
+  searchSessionsMock: vi.fn(),
+  routerPushMock: vi.fn(),
+}))
+
+vi.mock('@/api/hermes/sessions', () => ({
+  fetchSessions: apiMocks.fetchSessionsMock,
+  searchSessions: apiMocks.searchSessionsMock,
+}))
+
+const chatStoreMock = vi.hoisted(() => ({
+  sessions: [] as Array<Record<string, any>>,
+  loadSessions: vi.fn(),
+  switchSession: vi.fn(),
+  newChat: vi.fn(),
+}))
+
+vi.mock('@/stores/hermes/chat', () => ({
+  useChatStore: () => chatStoreMock,
+}))
+
+const routerCurrentRoute = { value: { name: 'hermes.logs' } }
+
+vi.mock('vue-router', () => ({
+  useRouter: () => ({
+    currentRoute: routerCurrentRoute,
+    push: apiMocks.routerPushMock,
+  }),
+}))
+
+vi.mock('vue-i18n', () => ({
+  useI18n: () => ({
+    t: (key: string) => key,
+  }),
+}))
+
+vi.mock('naive-ui', async () => {
+  const actual = await vi.importActual<any>('naive-ui')
+  return {
+    ...actual,
+    useMessage: () => ({
+      error: vi.fn(),
+    }),
+    NModal: {
+      props: ['show'],
+      emits: ['update:show'],
+      template: '<div v-if="show" class="n-modal-stub"><slot /></div>',
+    },
+    NInput: {
+      props: ['value', 'size'],
+      emits: ['update:value', 'keydown'],
+      template: '<input class="n-input-stub" :value="value" @input="$emit(\'update:value\', $event.target.value)" @keydown="$emit(\'keydown\', $event)" />',
+    },
+    NSpin: {
+      template: '<div class="n-spin-stub"><slot /></div>',
+    },
+    NButton: {
+      template: '<button class="n-button-stub"><slot /></button>',
+    },
+  }
+})
+
+import SessionSearchModal from '@/components/hermes/chat/SessionSearchModal.vue'
+import { useSessionSearch } from '@/composables/useSessionSearch'
+import { useKeyboard } from '@/composables/useKeyboard'
+
+function flushPromises() {
+  return Promise.resolve().then(() => Promise.resolve())
+}
+
+describe('session search modal', () => {
+  beforeEach(() => {
+    vi.useFakeTimers()
+    vi.clearAllMocks()
+    chatStoreMock.sessions = []
+    chatStoreMock.loadSessions.mockResolvedValue(undefined)
+    chatStoreMock.switchSession.mockResolvedValue(undefined)
+    apiMocks.fetchSessionsMock.mockResolvedValue([
+      {
+        id: 'recent-1',
+        source: 'cli',
+        model: 'openai/gpt-5.4',
+        title: 'Recent Docker fix',
+        preview: 'recent preview',
+        started_at: 1710000000,
+        ended_at: 1710000001,
+        last_active: 1710000002,
+        message_count: 2,
+        tool_call_count: 0,
+        input_tokens: 1,
+        output_tokens: 2,
+        cache_read_tokens: 0,
+        cache_write_tokens: 0,
+        reasoning_tokens: 0,
+        billing_provider: 'openrouter',
+        estimated_cost_usd: 0,
+        actual_cost_usd: 0,
+        cost_status: 'estimated',
+      },
+    ])
+    apiMocks.searchSessionsMock.mockResolvedValue([
+      {
+        id: 'match-1',
+        source: 'telegram',
+        model: 'openai/gpt-5.4',
+        title: 'Debugging session',
+        preview: 'search preview',
+        started_at: 1710001000,
+        ended_at: null,
+        last_active: 1710001005,
+        message_count: 4,
+        tool_call_count: 1,
+        input_tokens: 3,
+        output_tokens: 4,
+        cache_read_tokens: 0,
+        cache_write_tokens: 0,
+        reasoning_tokens: 0,
+        billing_provider: 'openrouter',
+        estimated_cost_usd: 0,
+        actual_cost_usd: 0,
+        cost_status: 'estimated',
+        matched_message_id: 17,
+        snippet: 'docker compose up',
+        rank: 0.1,
+      },
+    ])
+    routerCurrentRoute.value = { name: 'hermes.logs' }
+  })
+
+  afterEach(() => {
+    vi.useRealTimers()
+  })
+
+  it('opens from Cmd/Ctrl+K and loads recent sessions', async () => {
+    const { openSessionSearch, sessionSearchOpen } = useSessionSearch()
+    const wrapper = mount(SessionSearchModal, {
+      global: {
+        stubs: {
+          NModal: false,
+          NInput: false,
+          NSpin: false,
+          NButton: false,
+        },
+      },
+    })
+
+    openSessionSearch()
+    await flushPromises()
+    await nextTick()
+
+    expect(sessionSearchOpen.value).toBe(true)
+    expect(apiMocks.fetchSessionsMock).toHaveBeenCalledWith(undefined, 8)
+    expect(wrapper.text()).toContain('Recent Docker fix')
+  })
+
+  it('searches by content and opens the matched session', async () => {
+    const { openSessionSearch } = useSessionSearch()
+    const wrapper = mount(SessionSearchModal)
+
+    openSessionSearch()
+    await flushPromises()
+    await nextTick()
+
+    const input = wrapper.find('input.n-input-stub')
+    await input.setValue('docker')
+    await vi.advanceTimersByTimeAsync(200)
+    await flushPromises()
+    await nextTick()
+
+    expect(apiMocks.searchSessionsMock).toHaveBeenCalledWith('docker', undefined, 10)
+    expect(wrapper.text()).toContain('Debugging session')
+
+    await wrapper.find('button.result-item').trigger('click')
+    await flushPromises()
+
+    expect(chatStoreMock.loadSessions).toHaveBeenCalled()
+    expect(chatStoreMock.switchSession).toHaveBeenCalledWith('match-1', '17')
+    expect(apiMocks.routerPushMock).toHaveBeenCalledWith({ name: 'hermes.chat' })
+  })
+})
+
+describe('keyboard shortcut', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    const { closeSessionSearch } = useSessionSearch()
+    closeSessionSearch()
+    chatStoreMock.newChat.mockReset()
+  })
+
+  it('opens session search on Cmd/Ctrl+K', async () => {
+    const Dummy = defineComponent({
+      setup() {
+        useKeyboard()
+        return () => h('div')
+      },
+    })
+
+    mount(Dummy)
+
+    window.dispatchEvent(new KeyboardEvent('keydown', { key: 'k', metaKey: true }))
+    await nextTick()
+
+    expect(useSessionSearch().sessionSearchOpen.value).toBe(true)
+  })
+})
diff --git a/tests/client/sidebar-search.test.ts b/tests/client/sidebar-search.test.ts
new file mode 100644
index 00000000..0e3a55e6
--- /dev/null
+++ b/tests/client/sidebar-search.test.ts
@@ -0,0 +1,93 @@
+// @vitest-environment jsdom
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { mount } from '@vue/test-utils'
+
+const openSessionSearchMock = vi.hoisted(() => vi.fn())
+
+vi.mock('@/composables/useSessionSearch', () => ({
+  useSessionSearch: () => ({
+    openSessionSearch: openSessionSearchMock,
+  }),
+}))
+
+vi.mock('@/stores/hermes/app', () => ({
+  useAppStore: () => ({
+    sidebarOpen: true,
+    connected: true,
+    serverVersion: 'test',
+    updateAvailable: false,
+    updating: false,
+    toggleSidebar: vi.fn(),
+    closeSidebar: vi.fn(),
+    doUpdate: vi.fn(),
+  }),
+}))
+
+vi.mock('vue-router', async (importOriginal) => {
+  const actual = await importOriginal<any>()
+  return {
+    ...actual,
+    useRoute: () => ({ name: 'hermes.chat' }),
+    useRouter: () => ({ push: vi.fn() }),
+  }
+})
+
+vi.mock('vue-i18n', () => ({
+  useI18n: () => ({
+    t: (key: string) => key,
+  }),
+}))
+
+vi.mock('@/composables/useTheme', () => ({
+  useTheme: () => ({ isDark: false }),
+}))
+
+vi.mock('/logo.png', () => ({
+  default: 'logo.png',
+}))
+
+vi.mock('naive-ui', async () => {
+  const actual = await vi.importActual<any>('naive-ui')
+  return {
+    ...actual,
+    useMessage: () => ({
+      success: vi.fn(),
+      error: vi.fn(),
+    }),
+    NButton: {
+      template: '<button><slot /></button>',
+    },
+    NSelect: {
+      template: '<div />',
+    },
+  }
+})
+
+import AppSidebar from '@/components/layout/AppSidebar.vue'
+
+describe('AppSidebar search entry', () => {
+  beforeEach(() => {
+    openSessionSearchMock.mockClear()
+  })
+
+  it('opens the session search modal from the sidebar button', async () => {
+    const wrapper = mount(AppSidebar, {
+      global: {
+        stubs: {
+          ProfileSelector: true,
+          ModelSelector: true,
+          LanguageSwitch: true,
+          ThemeSwitch: true,
+          NButton: true,
+        },
+      },
+    })
+
+    const buttons = wrapper.findAll('button')
+    const searchButton = buttons.find(node => node.text().includes('sidebar.search'))
+    expect(searchButton).toBeTruthy()
+
+    await searchButton!.trigger('click')
+    expect(openSessionSearchMock).toHaveBeenCalledTimes(1)
+  })
+})
diff --git a/tests/server/sessions-db.test.ts b/tests/server/sessions-db.test.ts
index c0f02566..1b686004 100644
--- a/tests/server/sessions-db.test.ts
+++ b/tests/server/sessions-db.test.ts
@@ -1,7 +1,15 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 
 const allMock = vi.fn()
-const prepareMock = vi.fn(() => ({ all: allMock }))
+const titleAllMock = vi.fn()
+const contentAllMock = vi.fn()
+const likeAllMock = vi.fn()
+const prepareMock = vi.fn((sql: string) => {
+  if (sql.includes('messages_fts MATCH')) return ({ all: contentAllMock })
+  if (sql.includes('m.content LIKE ?')) return ({ all: likeAllMock })
+  if (sql.includes("LOWER(COALESCE(base.title, '')) LIKE ?")) return ({ all: titleAllMock })
+  return ({ all: allMock })
+})
 const closeMock = vi.fn()
 const databaseSyncMock = vi.fn(() => ({ prepare: prepareMock, close: closeMock }))
 const getActiveProfileDirMock = vi.fn(() => '/tmp/hermes-profile')
@@ -18,6 +26,9 @@ describe('session DB summaries', () => {
   beforeEach(() => {
     vi.resetModules()
     allMock.mockReset()
+    titleAllMock.mockReset()
+    contentAllMock.mockReset()
+    likeAllMock.mockReset()
     prepareMock.mockClear()
     closeMock.mockClear()
     databaseSyncMock.mockClear()
@@ -122,4 +133,144 @@ describe('session DB summaries', () => {
     expect(rows[0].source).toBe('telegram')
     expect(rows[0].title).toBe('preview text')
   })
+
+  it('searches session titles and content with deduped results', async () => {
+    titleAllMock.mockReturnValue([
+      {
+        id: 'title-1',
+        source: 'cli',
+        user_id: '',
+        model: 'openai/gpt-5.4',
+        title: 'Docker debugging',
+        started_at: 1710001000,
+        ended_at: null,
+        end_reason: '',
+        message_count: 2,
+        tool_call_count: 0,
+        input_tokens: 1,
+        output_tokens: 2,
+        cache_read_tokens: 0,
+        cache_write_tokens: 0,
+        reasoning_tokens: 0,
+        billing_provider: '',
+        estimated_cost_usd: 0,
+        actual_cost_usd: null,
+        cost_status: '',
+        preview: 'title preview',
+        last_active: 1710001005,
+        matched_message_id: null,
+        snippet: 'Docker debugging',
+        rank: 0,
+      },
+    ])
+    contentAllMock.mockReturnValue([
+      {
+        id: 'title-1',
+        source: 'cli',
+        user_id: '',
+        model: 'openai/gpt-5.4',
+        title: 'Docker debugging',
+        started_at: 1710001000,
+        ended_at: null,
+        end_reason: '',
+        message_count: 2,
+        tool_call_count: 0,
+        input_tokens: 1,
+        output_tokens: 2,
+        cache_read_tokens: 0,
+        cache_write_tokens: 0,
+        reasoning_tokens: 0,
+        billing_provider: '',
+        estimated_cost_usd: 0,
+        actual_cost_usd: null,
+        cost_status: '',
+        preview: 'title preview',
+        last_active: 1710001005,
+        matched_message_id: 42,
+        snippet: '>>>docker<<< compose up',
+        rank: 0.25,
+      },
+      {
+        id: 'content-2',
+        source: 'telegram',
+        user_id: '',
+        model: 'openai/gpt-5.4',
+        title: '',
+        started_at: 1710002000,
+        ended_at: null,
+        end_reason: '',
+        message_count: 1,
+        tool_call_count: 0,
+        input_tokens: 3,
+        output_tokens: 4,
+        cache_read_tokens: 0,
+        cache_write_tokens: 0,
+        reasoning_tokens: 0,
+        billing_provider: '',
+        estimated_cost_usd: 0,
+        actual_cost_usd: null,
+        cost_status: '',
+        preview: 'content preview',
+        last_active: 1710002001,
+        matched_message_id: 7,
+        snippet: '>>>docker<<< swarm',
+        rank: 0.1,
+      },
+    ])
+
+    const mod = await import('../../packages/server/src/services/hermes/sessions-db')
+    const rows = await mod.searchSessionSummaries('docker', undefined, 10)
+
+    expect(prepareMock).toHaveBeenCalledWith(expect.stringContaining('messages_fts MATCH'))
+    expect(rows).toHaveLength(2)
+    expect(rows[0].id).toBe('title-1')
+    expect(rows[0].matched_message_id).toBeNull()
+    expect(rows[0].snippet).toBe('Docker debugging')
+    expect(rows[1].id).toBe('content-2')
+    expect(rows[1].matched_message_id).toBe(7)
+    expect(rows[1].snippet).toContain('docker')
+  })
+
+  it('falls back to LIKE search for CJK queries', async () => {
+    titleAllMock.mockReturnValue([])
+    contentAllMock.mockImplementation(() => {
+      throw new Error('fts5 tokenizer miss')
+    })
+    likeAllMock.mockReturnValue([
+      {
+        id: 'cjk-1',
+        source: 'cli',
+        user_id: '',
+        model: 'openai/gpt-5.4',
+        title: '',
+        started_at: 1710003000,
+        ended_at: null,
+        end_reason: '',
+        message_count: 1,
+        tool_call_count: 0,
+        input_tokens: 3,
+        output_tokens: 4,
+        cache_read_tokens: 0,
+        cache_write_tokens: 0,
+        reasoning_tokens: 0,
+        billing_provider: '',
+        estimated_cost_usd: 0,
+        actual_cost_usd: null,
+        cost_status: '',
+        preview: '中文预览',
+        last_active: 1710003002,
+        matched_message_id: 11,
+        snippet: '这是一段记忆断裂的内容',
+        rank: 0,
+      },
+    ])
+
+    const mod = await import('../../packages/server/src/services/hermes/sessions-db')
+    const rows = await mod.searchSessionSummaries('记忆断裂', undefined, 10)
+
+    expect(likeAllMock).toHaveBeenCalledWith('记忆断裂', '%记忆断裂%')
+    expect(rows).toHaveLength(1)
+    expect(rows[0].id).toBe('cjk-1')
+    expect(rows[0].snippet).toContain('记忆断裂')
+  })
 })
diff --git a/tests/server/sessions-routes.test.ts b/tests/server/sessions-routes.test.ts
index 2e3d387e..621f57aa 100644
--- a/tests/server/sessions-routes.test.ts
+++ b/tests/server/sessions-routes.test.ts
@@ -1,111 +1,87 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 
-const listSessionSummariesMock = vi.fn()
-const listSessionsMock = vi.fn()
-const listConversationSummariesMock = vi.fn()
-const getConversationDetailMock = vi.fn()
+const listConversationsMock = vi.fn(async (ctx: any) => { ctx.body = { sessions: [{ id: 'conversation-1' }] } })
+const getConversationMessagesMock = vi.fn(async (ctx: any) => { ctx.body = { session_id: ctx.params.id, messages: [] } })
+const listMock = vi.fn(async (ctx: any) => { ctx.body = { sessions: [{ id: 's1' }] } })
+const searchMock = vi.fn(async (ctx: any) => { ctx.body = { results: [{ id: 'search-1' }] } })
+const getMock = vi.fn(async (ctx: any) => { ctx.body = { session: { id: ctx.params.id } } })
+const removeMock = vi.fn(async (ctx: any) => { ctx.body = { ok: true } })
+const renameMock = vi.fn(async (ctx: any) => { ctx.body = { ok: true } })
 
-vi.mock('../../packages/server/src/services/hermes/sessions-db', () => ({
-  listSessionSummaries: listSessionSummariesMock,
-}))
-
-vi.mock('../../packages/server/src/services/hermes/conversations', () => ({
-  listConversationSummaries: listConversationSummariesMock,
-  getConversationDetail: getConversationDetailMock,
-}))
-
-vi.mock('../../packages/server/src/services/hermes/hermes-cli', () => ({
-  listSessions: listSessionsMock,
-  getSession: vi.fn(),
-  deleteSession: vi.fn(),
-  renameSession: vi.fn(),
+vi.mock('../../packages/server/src/controllers/hermes/sessions', () => ({
+  listConversations: listConversationsMock,
+  getConversationMessages: getConversationMessagesMock,
+  list: listMock,
+  search: searchMock,
+  get: getMock,
+  remove: removeMock,
+  rename: renameMock,
 }))
 
 describe('session routes', () => {
   beforeEach(() => {
     vi.resetModules()
-    listSessionSummariesMock.mockReset()
-    listSessionsMock.mockReset()
-    listConversationSummariesMock.mockReset()
-    getConversationDetailMock.mockReset()
+    listConversationsMock.mockClear()
+    getConversationMessagesMock.mockClear()
+    listMock.mockClear()
+    searchMock.mockClear()
+    getMock.mockClear()
+    removeMock.mockClear()
+    renameMock.mockClear()
   })
 
-  it('serves summaries from sqlite-backed helper when available', async () => {
-    listSessionSummariesMock.mockResolvedValue([{ id: 's1' }])
+  it('registers conversations, session list, and search routes', async () => {
     const { sessionRoutes } = await import('../../packages/server/src/routes/hermes/sessions')
-    const layer = sessionRoutes.stack.find((entry: any) => entry.path === '/api/hermes/sessions')
+    const paths = sessionRoutes.stack.map((entry: any) => entry.path)
+
+    expect(paths).toEqual(expect.arrayContaining([
+      '/api/hermes/sessions/conversations',
+      '/api/hermes/sessions/conversations/:id/messages',
+      '/api/hermes/sessions',
+      '/api/hermes/search/sessions',
+      '/api/hermes/sessions/search',
+      '/api/hermes/sessions/:id',
+      '/api/hermes/sessions/:id/rename',
+    ]))
+  })
+
+  it('delegates session search to the controller', async () => {
+    const { sessionRoutes } = await import('../../packages/server/src/routes/hermes/sessions')
+    const layer = sessionRoutes.stack.find((entry: any) => entry.path === '/api/hermes/search/sessions')
     const handler = layer.stack[0]
-    const ctx: any = { query: { source: 'cli', limit: '5' }, body: null }
+    const ctx: any = { query: { q: 'docker', limit: '8' }, body: null, params: {} }
 
     await handler(ctx)
 
-    expect(listSessionSummariesMock).toHaveBeenCalledWith('cli', 5)
-    expect(listSessionsMock).not.toHaveBeenCalled()
-    expect(ctx.body).toEqual({ sessions: [{ id: 's1' }] })
+    expect(searchMock).toHaveBeenCalledWith(ctx)
+    expect(ctx.body).toEqual({ results: [{ id: 'search-1' }] })
   })
 
-  it('falls back to CLI wrapper when sqlite summary query fails', async () => {
-    listSessionSummariesMock.mockRejectedValue(new Error('sqlite unavailable'))
-    listSessionsMock.mockResolvedValue([{ id: 'fallback' }])
+  it('keeps the legacy search path wired to the same controller', async () => {
     const { sessionRoutes } = await import('../../packages/server/src/routes/hermes/sessions')
-    const layer = sessionRoutes.stack.find((entry: any) => entry.path === '/api/hermes/sessions')
+    const layer = sessionRoutes.stack.find((entry: any) => entry.path === '/api/hermes/sessions/search')
     const handler = layer.stack[0]
-    const ctx: any = { query: { limit: '7' }, body: null }
+    const ctx: any = { query: { q: 'docker' }, body: null, params: {} }
 
     await handler(ctx)
 
-    expect(listSessionSummariesMock).toHaveBeenCalledWith(undefined, 7)
-    expect(listSessionsMock).toHaveBeenCalledWith(undefined, 7)
-    expect(ctx.body).toEqual({ sessions: [{ id: 'fallback' }] })
+    expect(searchMock).toHaveBeenCalledWith(ctx)
+    expect(ctx.body).toEqual({ results: [{ id: 'search-1' }] })
   })
 
-  it('serves live conversations with humanOnly defaulting to true', async () => {
-    listConversationSummariesMock.mockResolvedValue([{ id: 'conversation-1' }])
-    const { sessionRoutes } = await import('../../packages/server/src/routes/hermes/sessions')
-    const layer = sessionRoutes.stack.find((entry: any) => entry.path === '/api/hermes/sessions/conversations')
-    const handler = layer.stack[0]
-    const ctx: any = { query: {}, body: null }
-
-    await handler(ctx)
-
-    expect(listConversationSummariesMock).toHaveBeenCalledWith({ humanOnly: true, source: undefined, limit: undefined })
-    expect(ctx.body).toEqual({ sessions: [{ id: 'conversation-1' }] })
-  })
-
-  it('supports disabling humanOnly and forwarding limit/source for live conversations', async () => {
-    listConversationSummariesMock.mockResolvedValue([{ id: 'child-session' }])
+  it('delegates conversations list and detail routes', async () => {
     const { sessionRoutes } = await import('../../packages/server/src/routes/hermes/sessions')
     const listLayer = sessionRoutes.stack.find((entry: any) => entry.path === '/api/hermes/sessions/conversations')
-
-    const listCtx: any = { query: { humanOnly: 'false', source: 'cli', limit: '25' }, body: null }
-    await listLayer.stack[0](listCtx)
-
-    expect(listConversationSummariesMock).toHaveBeenCalledWith({ humanOnly: false, source: 'cli', limit: 25 })
-    expect(listCtx.body).toEqual({ sessions: [{ id: 'child-session' }] })
-  })
-
-  it('returns conversation detail and forwards humanOnly/source', async () => {
-    getConversationDetailMock.mockResolvedValue({ session_id: 'child-session', messages: [] })
-    const { sessionRoutes } = await import('../../packages/server/src/routes/hermes/sessions')
     const detailLayer = sessionRoutes.stack.find((entry: any) => entry.path === '/api/hermes/sessions/conversations/:id/messages')
 
-    const detailCtx: any = { params: { id: 'child-session' }, query: { humanOnly: 'false', source: 'discord' }, body: null, status: 200 }
-    await detailLayer.stack[0](detailCtx)
+    const listCtx: any = { query: {}, body: null, params: {} }
+    await listLayer.stack[0](listCtx)
+    expect(listConversationsMock).toHaveBeenCalledWith(listCtx)
+    expect(listCtx.body).toEqual({ sessions: [{ id: 'conversation-1' }] })
 
-    expect(getConversationDetailMock).toHaveBeenCalledWith('child-session', { humanOnly: false, source: 'discord' })
+    const detailCtx: any = { params: { id: 'child-session' }, query: {}, body: null }
+    await detailLayer.stack[0](detailCtx)
+    expect(getConversationMessagesMock).toHaveBeenCalledWith(detailCtx)
     expect(detailCtx.body).toEqual({ session_id: 'child-session', messages: [] })
   })
-
-  it('returns 404 when a conversation detail is not found', async () => {
-    getConversationDetailMock.mockResolvedValue(null)
-    const { sessionRoutes } = await import('../../packages/server/src/routes/hermes/sessions')
-    const detailLayer = sessionRoutes.stack.find((entry: any) => entry.path === '/api/hermes/sessions/conversations/:id/messages')
-
-    const detailCtx: any = { params: { id: 'missing' }, query: {}, body: null, status: 200 }
-    await detailLayer.stack[0](detailCtx)
-
-    expect(getConversationDetailMock).toHaveBeenCalledWith('missing', { humanOnly: true, source: undefined })
-    expect(detailCtx.status).toBe(404)
-    expect(detailCtx.body).toEqual({ error: 'Conversation not found' })
-  })
 })