From b2ed4d6ada282c4d5ef35a6f05ca9e7dd2195924 Mon Sep 17 00:00:00 2001
From: Artea <sepush@outlook.com>
Date: Wed, 28 Jan 2026 04:05:11 +0800
Subject: [PATCH] feat(theme): add sidebar collapse functionality

---
 src/client/theme-default/Layout.vue           |   6 +-
 .../theme-default/components/VPContent.vue    |  13 +-
 .../theme-default/components/VPLocalNav.vue   |   8 ++
 .../theme-default/components/VPNavBar.vue     | 135 +++++++++++++++++-
 .../components/VPNavBarSearch.vue             |  59 ++++++--
 .../components/VPNavBarTitle.vue              | 105 +++++++++++---
 .../theme-default/components/VPSidebar.vue    |  13 +-
 .../theme-default/composables/sidebar.ts      |  22 +++
 src/client/theme-default/styles/icons.css     |   6 +
 9 files changed, 330 insertions(+), 37 deletions(-)

diff --git a/src/client/theme-default/Layout.vue b/src/client/theme-default/Layout.vue
index ace5edd5..899b3a66 100644
--- a/src/client/theme-default/Layout.vue
+++ b/src/client/theme-default/Layout.vue
@@ -9,7 +9,7 @@ import VPSidebar from './components/VPSidebar.vue'
 import VPSkipLink from './components/VPSkipLink.vue'
 import { useData } from './composables/data'
 import { layoutInfoInjectionKey, registerWatchers } from './composables/layout'
-import { useSidebarControl } from './composables/sidebar'
+import { useSidebarControl, useSidebarCollapse } from './composables/sidebar'
 
 const {
   isOpen: isSidebarOpen,
@@ -17,6 +17,8 @@ const {
   close: closeSidebar
 } = useSidebarControl()
 
+const { isCollapsed: isSidebarCollapsed } = useSidebarCollapse()
+
 registerWatchers({ closeSidebar })
 
 const { frontmatter } = useData()
@@ -31,7 +33,7 @@ provide(layoutInfoInjectionKey, { heroImageSlotExists })
   <div
     v-if="frontmatter.layout !== false"
     class="Layout"
-    :class="frontmatter.pageClass"
+    :class="[frontmatter.pageClass, { 'sidebar-collapsed': isSidebarCollapsed }]"
   >
     <slot name="layout-top" />
     <VPSkipLink />
diff --git a/src/client/theme-default/components/VPContent.vue b/src/client/theme-default/components/VPContent.vue
index b0eb5fc8..eb220a4b 100644
--- a/src/client/theme-default/components/VPContent.vue
+++ b/src/client/theme-default/components/VPContent.vue
@@ -2,19 +2,21 @@
 import NotFound from '../NotFound.vue'
 import { useData } from '../composables/data'
 import { useLayout } from '../composables/layout'
+import { useSidebarCollapse } from '../composables/sidebar'
 import VPDoc from './VPDoc.vue'
 import VPHome from './VPHome.vue'
 import VPPage from './VPPage.vue'
 
 const { page, frontmatter } = useData()
 const { isHome, hasSidebar } = useLayout()
+const { isCollapsed } = useSidebarCollapse()
 </script>
 
 <template>
   <div
     class="VPContent"
     id="VPContent"
-    :class="{ 'has-sidebar': hasSidebar, 'is-home': isHome }"
+    :class="{ 'has-sidebar': hasSidebar, 'is-home': isHome, 'sidebar-collapsed': isCollapsed }"
   >
     <slot name="not-found" v-if="page.isNotFound"><NotFound /></slot>
 
@@ -83,6 +85,11 @@ const { isHome, hasSidebar } = useLayout()
   .VPContent.has-sidebar {
     margin: var(--vp-layout-top-height, 0px) 0 0;
     padding-left: var(--vp-sidebar-width);
+    transition: padding-left 0.25s;
+  }
+
+  .VPContent.has-sidebar.sidebar-collapsed {
+    padding-left: 0;
   }
 }
 
@@ -91,5 +98,9 @@ const { isHome, hasSidebar } = useLayout()
     padding-right: calc((100% - var(--vp-layout-max-width)) / 2);
     padding-left: calc((100% - var(--vp-layout-max-width)) / 2 + var(--vp-sidebar-width));
   }
+
+  .VPContent.has-sidebar.sidebar-collapsed {
+    padding-left: calc((100% - var(--vp-layout-max-width)) / 2);
+  }
 }
 </style>
diff --git a/src/client/theme-default/components/VPLocalNav.vue b/src/client/theme-default/components/VPLocalNav.vue
index f80bb361..f72e6e18 100644
--- a/src/client/theme-default/components/VPLocalNav.vue
+++ b/src/client/theme-default/components/VPLocalNav.vue
@@ -3,6 +3,7 @@ import { useWindowScroll } from '@vueuse/core'
 import { computed, onMounted, ref } from 'vue'
 import { useData } from '../composables/data'
 import { useLayout } from '../composables/layout'
+import { useSidebarCollapse } from '../composables/sidebar'
 import VPLocalNavOutlineDropdown from './VPLocalNavOutlineDropdown.vue'
 
 defineProps<{
@@ -15,6 +16,7 @@ defineEmits<{
 
 const { theme } = useData()
 const { isHome, hasSidebar, headers, hasLocalNav } = useLayout()
+const { isCollapsed } = useSidebarCollapse()
 const { y } = useWindowScroll()
 
 const navHeight = ref(0)
@@ -31,6 +33,7 @@ const classes = computed(() => {
   return {
     VPLocalNav: true,
     'has-sidebar': hasSidebar.value,
+    'sidebar-collapsed': isCollapsed.value,
     empty: !hasLocalNav.value,
     fixed: !hasLocalNav.value && !hasSidebar.value
   }
@@ -85,6 +88,11 @@ const classes = computed(() => {
 
   .VPLocalNav.has-sidebar {
     padding-left: var(--vp-sidebar-width);
+    transition: padding-left 0.3s ease;
+  }
+
+  .VPLocalNav.has-sidebar.sidebar-collapsed {
+    padding-left: 0;
   }
 
   .VPLocalNav.empty {
diff --git a/src/client/theme-default/components/VPNavBar.vue b/src/client/theme-default/components/VPNavBar.vue
index 963c4610..78f69241 100644
--- a/src/client/theme-default/components/VPNavBar.vue
+++ b/src/client/theme-default/components/VPNavBar.vue
@@ -2,6 +2,7 @@
 import { useWindowScroll } from '@vueuse/core'
 import { ref, watchPostEffect } from 'vue'
 import { useLayout } from '../composables/layout'
+import { useSidebarCollapse } from '../composables/sidebar'
 import VPNavBarAppearance from './VPNavBarAppearance.vue'
 import VPNavBarExtra from './VPNavBarExtra.vue'
 import VPNavBarHamburger from './VPNavBarHamburger.vue'
@@ -21,17 +22,29 @@ defineEmits<{
 
 const { y } = useWindowScroll()
 const { isHome, hasSidebar } = useLayout()
+const { isCollapsed, expand } = useSidebarCollapse()
+
+const searchRef = ref<InstanceType<typeof VPNavBarSearch> | null>(null)
 
 const classes = ref<Record<string, boolean>>({})
 
 watchPostEffect(() => {
   classes.value = {
     'has-sidebar': hasSidebar.value,
+    'sidebar-collapsed': isCollapsed.value,
     'home': isHome.value,
     'top': y.value === 0,
     'screen-open': props.isScreenOpen
   }
 })
+
+function handleExpand() {
+  expand()
+}
+
+function handleCapsuleSearch() {
+  searchRef.value?.openSearch()
+}
 </script>
 
 <template>
@@ -43,12 +56,31 @@ watchPostEffect(() => {
             <template #nav-bar-title-before><slot name="nav-bar-title-before" /></template>
             <template #nav-bar-title-after><slot name="nav-bar-title-after" /></template>
           </VPNavBarTitle>
+          <div v-if="hasSidebar && isCollapsed" class="expand-capsule">
+            <button
+              class="capsule-btn expand-btn"
+              @click="handleExpand"
+              aria-label="Expand sidebar"
+              title="Expand sidebar"
+            >
+              <span class="vpi-sidebar-expand capsule-icon" />
+            </button>
+            <div class="capsule-divider" />
+            <button
+              class="capsule-btn search-btn"
+              @click="handleCapsuleSearch"
+              aria-label="Search"
+              title="Search"
+            >
+              <span class="vpi-search capsule-icon" />
+            </button>
+          </div>
         </div>
 
         <div class="content">
           <div class="content-body">
             <slot name="nav-bar-content-before" />
-            <VPNavBarSearch class="search" />
+            <VPNavBarSearch ref="searchRef" :icon-only="hasSidebar && isCollapsed" class="search" />
             <VPNavBarMenu class="menu" />
             <VPNavBarTranslations class="translations" />
             <VPNavBarAppearance class="appearance" />
@@ -140,6 +172,8 @@ watchPostEffect(() => {
   flex-shrink: 0;
   height: calc(var(--vp-nav-height) - 1px);
   transition: background-color 0.5s;
+  display: flex;
+  align-items: center;
 }
 
 @media (min-width: 960px) {
@@ -152,6 +186,16 @@ watchPostEffect(() => {
     width: var(--vp-sidebar-width);
     height: var(--vp-nav-height);
     background-color: transparent;
+    transition: width 0.3s ease, padding 0.3s ease;
+  }
+
+  .VPNavBar.has-sidebar.sidebar-collapsed .title {
+    padding-left: 24px;
+    width: auto;
+  }
+
+  .VPNavBar.has-sidebar.sidebar-collapsed .title :deep(.VPNavBarTitle) {
+    display: none;
   }
 }
 
@@ -160,6 +204,15 @@ watchPostEffect(() => {
     padding-left: max(32px, calc((100% - (var(--vp-layout-max-width) - 64px)) / 2));
     width: calc((100% - (var(--vp-layout-max-width) - 64px)) / 2 + var(--vp-sidebar-width) - 32px);
   }
+
+  .VPNavBar.has-sidebar.sidebar-collapsed .title {
+    padding-left: 24px;
+    width: auto;
+  }
+
+  .VPNavBar.has-sidebar.sidebar-collapsed .title :deep(.VPNavBarTitle) {
+    display: none;
+  }
 }
 
 .content {
@@ -172,6 +225,12 @@ watchPostEffect(() => {
     z-index: 1;
     padding-left: var(--vp-sidebar-width);
     padding-right: 32px;
+    transition: padding-left 0.3s ease;
+  }
+
+  .VPNavBar.has-sidebar.sidebar-collapsed .content {
+    padding-left: 0;
+    background-color: var(--vp-nav-bg-color);
   }
 }
 
@@ -180,6 +239,11 @@ watchPostEffect(() => {
     padding-left: calc((100% - var(--vp-layout-max-width)) / 2 + var(--vp-sidebar-width));
     padding-right: calc((100% - var(--vp-layout-max-width)) / 2 + 32px);
   }
+
+  .VPNavBar.has-sidebar.sidebar-collapsed .content {
+    padding-left: 0;
+    background-color: var(--vp-nav-bg-color);
+  }
 }
 
 .content-body {
@@ -204,6 +268,11 @@ watchPostEffect(() => {
     margin-right: -100vw;
     padding-right: 100vw;
   }
+
+  .VPNavBar.has-sidebar.sidebar-collapsed .content-body {
+    margin-left: -32px;
+    padding-left: 32px;
+  }
 }
 
 @media (max-width: 767px) {
@@ -238,6 +307,55 @@ watchPostEffect(() => {
   margin-right: -8px;
 }
 
+/* Sidebar expand capsule - only show on desktop */
+.expand-capsule {
+  display: none;
+}
+
+@media (min-width: 960px) {
+  .expand-capsule {
+    display: flex;
+    align-items: center;
+    border: 1px solid var(--vp-c-divider);
+    border-radius: 20px;
+    background: var(--vp-c-bg);
+    padding: 4px;
+    margin-left: 12px;
+    gap: 2px;
+    box-shadow: var(--vp-shadow-1);
+  }
+
+  .capsule-btn {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 28px;
+    height: 28px;
+    border: none;
+    border-radius: 50%;
+    background: transparent;
+    color: var(--vp-c-text-2);
+    cursor: pointer;
+    transition: color 0.25s, background-color 0.25s;
+  }
+
+  .capsule-btn:hover {
+    color: var(--vp-c-text-1);
+    background: var(--vp-c-default-soft);
+  }
+
+  .capsule-icon {
+    width: 18px;
+    height: 18px;
+  }
+
+  .capsule-divider {
+    width: 1px;
+    height: 16px;
+    background: var(--vp-c-divider);
+  }
+}
+
 .divider {
   width: 100%;
   height: 1px;
@@ -246,12 +364,25 @@ watchPostEffect(() => {
 @media (min-width: 960px) {
   .VPNavBar.has-sidebar .divider {
     padding-left: var(--vp-sidebar-width);
+    transition: padding-left 0.3s ease;
+  }
+
+  .VPNavBar.has-sidebar.sidebar-collapsed .divider {
+    padding-left: 0;
+  }
+
+  .VPNavBar.has-sidebar.sidebar-collapsed .divider-line {
+    background-color: var(--vp-c-gutter);
   }
 }
 
 @media (min-width: 1440px) {
   .VPNavBar.has-sidebar .divider {
-    padding-left: calc((100% - var(--vp-layout-max-width)) / 2 + var(--vp-sidebar-width));
+    padding-left: calc((100% - (var(--vp-layout-max-width) - 64px)) / 2 + var(--vp-sidebar-width) - 32px);
+  }
+
+  .VPNavBar.has-sidebar.sidebar-collapsed .divider {
+    padding-left: 0;
   }
 }
 
diff --git a/src/client/theme-default/components/VPNavBarSearch.vue b/src/client/theme-default/components/VPNavBarSearch.vue
index 67c49300..cf062e63 100644
--- a/src/client/theme-default/components/VPNavBarSearch.vue
+++ b/src/client/theme-default/components/VPNavBarSearch.vue
@@ -2,10 +2,14 @@
 import '@docsearch/css'
 import { onKeyStroke } from '@vueuse/core'
 import type { DefaultTheme } from 'vitepress/theme'
-import { defineAsyncComponent, onMounted, onUnmounted, ref } from 'vue'
+import { defineAsyncComponent, onMounted, onUnmounted, ref, watch } from 'vue'
 import { useData } from '../composables/data'
 import VPNavBarSearchButton from './VPNavBarSearchButton.vue'
 
+defineProps<{
+  iconOnly?: boolean
+}>()
+
 const VPLocalSearchBox = __VP_LOCAL_SEARCH__
   ? defineAsyncComponent(() => import('./VPLocalSearchBox.vue'))
   : () => null
@@ -21,6 +25,7 @@ const { theme } = useData()
 // hit the hotkey to invoke it.
 const loaded = ref(false)
 const actuallyLoaded = ref(false)
+const pendingSearch = ref(false)
 
 const preconnect = () => {
   const id = 'VPAlgoliaPreconnect'
@@ -66,6 +71,14 @@ onMounted(() => {
   onUnmounted(remove)
 })
 
+function triggerAlgoliaSearch() {
+  const e = new KeyboardEvent('keydown', {
+    key: 'k',
+    metaKey: true,
+  })
+  window.dispatchEvent(e)
+}
+
 function load() {
   if (!loaded.value) {
     loaded.value = true
@@ -75,12 +88,7 @@ function load() {
 
 function poll() {
   // programmatically open the search box after initialize
-  const e = new Event('keydown') as any
-
-  e.key = 'k'
-  e.metaKey = true
-
-  window.dispatchEvent(e)
+  triggerAlgoliaSearch()
 
   setTimeout(() => {
     if (!document.querySelector('.DocSearch-Modal')) {
@@ -122,17 +130,39 @@ if (__VP_LOCAL_SEARCH__) {
 }
 
 const provider = __ALGOLIA__ ? 'algolia' : __VP_LOCAL_SEARCH__ ? 'local' : ''
+
+watch(actuallyLoaded, (value) => {
+  if (value && pendingSearch.value) {
+    pendingSearch.value = false
+    poll()
+  }
+})
+
+function openSearch() {
+  if (__VP_LOCAL_SEARCH__) {
+    showSearch.value = true
+  } else if (__ALGOLIA__) {
+    if (actuallyLoaded.value) {
+      triggerAlgoliaSearch()
+    } else {
+      pendingSearch.value = true
+      loaded.value = true
+    }
+  }
+}
+
+defineExpose({ openSearch })
 </script>
 
 <template>
-  <div class="VPNavBarSearch">
+  <div class="VPNavBarSearch" :class="{ 'icon-only': iconOnly }">
     <template v-if="provider === 'local'">
       <VPLocalSearchBox
         v-if="showSearch"
         @close="showSearch = false"
       />
 
-      <div id="local-search">
+      <div v-if="!iconOnly" id="local-search">
         <VPNavBarSearchButton @click="showSearch = true" />
       </div>
     </template>
@@ -144,7 +174,7 @@ const provider = __ALGOLIA__ ? 'algolia' : __VP_LOCAL_SEARCH__ ? 'local' : ''
         @vue:beforeMount="actuallyLoaded = true"
       />
 
-      <div v-if="!actuallyLoaded" id="docsearch">
+      <div v-if="!actuallyLoaded && !iconOnly" id="docsearch">
         <VPNavBarSearchButton @click="load" />
       </div>
     </template>
@@ -169,4 +199,13 @@ const provider = __ALGOLIA__ ? 'algolia' : __VP_LOCAL_SEARCH__ ? 'local' : ''
     padding-left: 32px;
   }
 }
+
+.VPNavBarSearch.icon-only {
+  flex-grow: 0;
+  padding-left: 0;
+}
+
+.VPNavBarSearch.icon-only #docsearch {
+  display: none;
+}
 </style>
diff --git a/src/client/theme-default/components/VPNavBarTitle.vue b/src/client/theme-default/components/VPNavBarTitle.vue
index 9679f8a5..e9b249f0 100644
--- a/src/client/theme-default/components/VPNavBarTitle.vue
+++ b/src/client/theme-default/components/VPNavBarTitle.vue
@@ -3,12 +3,14 @@ import { computed } from 'vue'
 import { useData } from '../composables/data'
 import { useLangs } from '../composables/langs'
 import { useLayout } from '../composables/layout'
+import { useSidebarCollapse } from '../composables/sidebar'
 import { normalizeLink } from '../support/utils'
 import VPImage from './VPImage.vue'
 
 const { site, theme } = useData()
-const { hasSidebar } = useLayout()
+const { hasSidebar, isSidebarEnabled } = useLayout()
 const { currentLang } = useLangs()
+const { isCollapsed, collapse } = useSidebarCollapse()
 
 const link = computed(() =>
   typeof theme.value.logoLink === 'string'
@@ -27,31 +29,63 @@ const target = computed(() =>
     ? undefined
     : theme.value.logoLink?.target
 )
+
+const showCollapseButton = computed(() => {
+  return hasSidebar.value && isSidebarEnabled.value && !isCollapsed.value
+})
+
+function handleCollapse() {
+  collapse()
+}
 </script>
 
 <template>
-  <div class="VPNavBarTitle" :class="{ 'has-sidebar': hasSidebar }">
-    <a
-      class="title"
-      :href="link ?? normalizeLink(currentLang.link)"
-      :rel
-      :target
-    >
-      <slot name="nav-bar-title-before" />
-      <VPImage v-if="theme.logo" class="logo" :image="theme.logo" />
-      <span v-if="theme.siteTitle" v-html="theme.siteTitle"></span>
-      <span v-else-if="theme.siteTitle === undefined">{{ site.title }}</span>
-      <slot name="nav-bar-title-after" />
-    </a>
+  <div class="VPNavBarTitle" :class="{ 'has-sidebar': hasSidebar, 'sidebar-collapsed': isCollapsed }">
+    <template v-if="!isCollapsed || !isSidebarEnabled">
+      <a
+        class="title"
+        :href="link ?? normalizeLink(currentLang.link)"
+        :rel
+        :target
+      >
+        <slot name="nav-bar-title-before" />
+        <VPImage v-if="theme.logo" class="logo" :image="theme.logo" />
+        <span v-if="theme.siteTitle" v-html="theme.siteTitle"></span>
+        <span v-else-if="theme.siteTitle === undefined">{{ site.title }}</span>
+        <slot name="nav-bar-title-after" />
+      </a>
+      <button
+        v-if="showCollapseButton"
+        class="collapse-btn"
+        @click="handleCollapse"
+        aria-label="collapse sidebar"
+        title="collapse sidebar"
+      >
+        <span class="vpi-sidebar-collapse collapse-icon" />
+      </button>
+    </template>
   </div>
 </template>
 
 <style scoped>
-.title {
+.VPNavBarTitle {
+  width: 100%;
   display: flex;
   align-items: center;
+  gap: 8px;
+  height: var(--vp-nav-height);
   border-bottom: 1px solid transparent;
-  width: 100%;
+}
+
+@media (min-width: 960px) {
+  .VPNavBarTitle.has-sidebar {
+    border-bottom-color: var(--vp-c-divider);
+  }
+}
+
+.title {
+  display: flex;
+  align-items: center;
   height: var(--vp-nav-height);
   font-size: 16px;
   font-weight: 600;
@@ -63,14 +97,45 @@ const target = computed(() =>
   .title {
     flex-shrink: 0;
   }
-
-  .VPNavBarTitle.has-sidebar .title {
-    border-bottom-color: var(--vp-c-divider);
-  }
 }
 
 :deep(.logo) {
   margin-right: 8px;
   height: var(--vp-nav-logo-height);
 }
+
+.collapse-btn {
+  display: none;
+  width: 28px;
+  height: 28px;
+  border-radius: 6px;
+  background-color: transparent;
+  border: 1px solid var(--vp-c-divider);
+  cursor: pointer;
+  transition: all 0.25s;
+  color: var(--vp-c-text-2);
+}
+
+@media (min-width: 960px) {
+  .collapse-btn {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+  }
+}
+
+.collapse-btn:hover {
+  background-color: var(--vp-c-bg-soft);
+  border-color: var(--vp-c-brand-1);
+  color: var(--vp-c-brand-1);
+}
+
+.collapse-btn:active {
+  transform: scale(0.95);
+}
+
+.collapse-icon {
+  width: 18px;
+  height: 18px;
+}
 </style>
diff --git a/src/client/theme-default/components/VPSidebar.vue b/src/client/theme-default/components/VPSidebar.vue
index 7e6e2528..5e73655e 100644
--- a/src/client/theme-default/components/VPSidebar.vue
+++ b/src/client/theme-default/components/VPSidebar.vue
@@ -3,9 +3,11 @@ import { useScrollLock } from '@vueuse/core'
 import { inBrowser } from 'vitepress'
 import { ref, watch } from 'vue'
 import { useLayout } from '../composables/layout'
+import { useSidebarCollapse } from '../composables/sidebar'
 import VPSidebarGroup from './VPSidebarGroup.vue'
 
 const { sidebarGroups, hasSidebar } = useLayout()
+const { isCollapsed } = useSidebarCollapse()
 
 const props = defineProps<{
   open: boolean
@@ -41,7 +43,7 @@ watch(
   <aside
     v-if="hasSidebar"
     class="VPSidebar"
-    :class="{ open }"
+    :class="{ open, collapsed: isCollapsed }"
     ref="navEl"
     @click.stop
   >
@@ -80,7 +82,7 @@ watch(
   overflow-x: hidden;
   overflow-y: auto;
   transform: translateX(-100%);
-  transition: opacity 0.5s, transform 0.25s ease;
+  transition: opacity 0.5s, transform 0.25s ease, width 0.3s ease;
   overscroll-behavior: contain;
 }
 
@@ -107,6 +109,13 @@ watch(
     box-shadow: none;
     transform: translateX(0);
   }
+
+  .VPSidebar.collapsed {
+    transform: translateX(calc(-1 * var(--vp-sidebar-width)));
+    opacity: 0;
+    visibility: hidden;
+    pointer-events: none;
+  }
 }
 
 @media (min-width: 1440px) {
diff --git a/src/client/theme-default/composables/sidebar.ts b/src/client/theme-default/composables/sidebar.ts
index b693cc89..62093b95 100644
--- a/src/client/theme-default/composables/sidebar.ts
+++ b/src/client/theme-default/composables/sidebar.ts
@@ -14,6 +14,7 @@ import { hasActiveLink as containsActiveLink } from '../support/sidebar'
 import { useData } from './data'
 
 const isOpen = ref(false)
+const isCollapsed = ref(false)
 
 /**
  * a11y: cache the element that opened the Sidebar (the menu button) then
@@ -65,6 +66,27 @@ export function useSidebarControl() {
   }
 }
 
+export function useSidebarCollapse() {
+  function collapse() {
+    isCollapsed.value = true
+  }
+
+  function expand() {
+    isCollapsed.value = false
+  }
+
+  function toggleCollapse() {
+    isCollapsed.value = !isCollapsed.value
+  }
+
+  return {
+    isCollapsed,
+    collapse,
+    expand,
+    toggleCollapse
+  }
+}
+
 export function useSidebarItemControl(
   item: ComputedRef<DefaultTheme.SidebarItem>
 ) {
diff --git a/src/client/theme-default/styles/icons.css b/src/client/theme-default/styles/icons.css
index 5297cab0..33a2f3e6 100644
--- a/src/client/theme-default/styles/icons.css
+++ b/src/client/theme-default/styles/icons.css
@@ -76,6 +76,12 @@
 .vpi-search {
   --icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cg fill='none' stroke='black' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.6'%3E%3Cpath d='m21 21l-4.34-4.34'/%3E%3Ccircle cx='11' cy='11' r='8' stroke-width='1.4'/%3E%3C/g%3E%3C/svg%3E");
 }
+.vpi-sidebar-expand {
+  --icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Crect x='3' y='4' width='6' height='16' rx='1' fill='black'/%3E%3Crect x='11' y='4' width='10' height='16' rx='1' stroke='black' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
+}
+.vpi-sidebar-collapse {
+  --icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Crect x='3' y='4' width='6' height='16' rx='1' stroke='black' stroke-width='1.5' fill='none'/%3E%3Crect x='11' y='4' width='10' height='16' rx='1' stroke='black' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
+}
 .vpi-layout-list {
   --icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cg fill='none' stroke='black' stroke-linecap='round' stroke-linejoin='round' stroke-width='2'%3E%3Crect width='7' height='7' x='3' y='3' rx='1'/%3E%3Crect width='7' height='7' x='3' y='14' rx='1'/%3E%3Cpath d='M14 4h7m-7 5h7m-7 6h7m-7 5h7'/%3E%3C/g%3E%3C/svg%3E");
 }