diff --git a/ordinis-admin-ui/src/components/layout/Sidebar.tsx b/ordinis-admin-ui/src/components/layout/Sidebar.tsx
index 2b7c7af..99f4ca2 100644
--- a/ordinis-admin-ui/src/components/layout/Sidebar.tsx
+++ b/ordinis-admin-ui/src/components/layout/Sidebar.tsx
@@ -1,3 +1,4 @@
+import { useState } from 'react'
 import { Link, useLocation } from '@tanstack/react-router'
 import { useTranslation } from 'react-i18next'
 import {
@@ -113,9 +114,37 @@ export function Sidebar() {
     }))
     .filter((s) => s.items.length > 0)
 
+  // Sidebar collapsed mode — per handoff prototype 'Свернуть' button bottom-left.
+  // Persists в localStorage. Collapsed = icon-only 56px rail, expanded = 220px.
+  const [collapsed, setCollapsed] = useState<boolean>(() => {
+    if (typeof window === 'undefined') return false
+    return window.localStorage.getItem('ord-sidebar-collapsed') === '1'
+  })
+  const toggleCollapsed = () => {
+    setCollapsed((prev) => {
+      const next = !prev
+      try {
+        window.localStorage.setItem('ord-sidebar-collapsed', next ? '1' : '0')
+      } catch {
+        // localStorage может быть disabled
+      }
+      return next
+    })
+  }
+
   return (
-    <aside className="hidden lg:flex w-[220px] shrink-0 flex-col border-r border-line bg-surface">
-      <SidebarContent sections={visibleSections} auth={auth} />
+    <aside
+      className={cn(
+        'hidden lg:flex shrink-0 flex-col border-r border-line bg-surface transition-[width] duration-200',
+        collapsed ? 'w-[56px]' : 'w-[220px]',
+      )}
+    >
+      <SidebarContent
+        sections={visibleSections}
+        auth={auth}
+        collapsed={collapsed}
+        onToggleCollapsed={toggleCollapsed}
+      />
     </aside>
   )
 }
@@ -128,22 +157,35 @@ function SidebarContent({
   sections,
   auth,
   onNavigate,
+  collapsed = false,
+  onToggleCollapsed,
 }: {
   sections: NavSection[]
   auth: ReturnType<typeof useAuth>
   /** Called после клика на nav item — для close drawer в mobile mode. */
   onNavigate?: () => void
+  /** Desktop collapse state — affects labels visibility и width. */
+  collapsed?: boolean
+  /** Toggle button handler. When undefined — collapse button hidden (mobile). */
+  onToggleCollapsed?: () => void
 }) {
+  const { t } = useTranslation()
   return (
     <>
       {/* Logo block */}
-      <div className="h-14 flex items-center px-5 border-b border-line shrink-0">
+      <div
+        className={cn(
+          'h-14 flex items-center border-b border-line shrink-0',
+          collapsed ? 'justify-center px-2' : 'px-5',
+        )}
+      >
         <Link
           to="/"
           className="font-display text-base tracking-wider text-navy hover:opacity-80 transition-opacity"
           onClick={onNavigate}
+          title="ORDINIS"
         >
-          ORDINIS
+          {collapsed ? 'O' : 'ORDINIS'}
         </Link>
       </div>
 
@@ -151,11 +193,11 @@ function SidebarContent({
       <nav className="flex-1 overflow-y-auto py-3 px-2 flex flex-col gap-4">
         {sections.map((section, idx) => (
           <div key={idx} className="flex flex-col gap-0.5">
-            {section.label && (
+            {section.label && !collapsed && (
               <div className="text-cap px-3 py-1 text-mute">{section.label}</div>
             )}
             {section.items.map((item) => (
-              <SidebarLink key={item.to} {...item} onClick={onNavigate} />
+              <SidebarLink key={item.to} {...item} onClick={onNavigate} collapsed={collapsed} />
             ))}
           </div>
         ))}
@@ -163,8 +205,19 @@ function SidebarContent({
 
       {/* User block — sticky bottom */}
       {auth.isAuthenticated && auth.user?.profile && (
-        <div className="border-t border-line px-3 py-3 flex items-center gap-2 shrink-0">
-          <div className="size-8 rounded-full bg-accent text-on-accent inline-flex items-center justify-center text-cell font-semibold">
+        <div
+          className={cn(
+            'border-t border-line py-3 flex items-center gap-2 shrink-0',
+            collapsed ? 'px-2 justify-center' : 'px-3',
+          )}
+          title={String(
+            auth.user.profile.preferred_username ||
+              auth.user.profile.name ||
+              auth.user.profile.email ||
+              'user',
+          )}
+        >
+          <div className="size-8 rounded-full bg-accent text-on-accent inline-flex items-center justify-center text-cell font-semibold shrink-0">
             {String(
               auth.user.profile.preferred_username ||
                 auth.user.profile.name ||
@@ -173,21 +226,45 @@ function SidebarContent({
               .charAt(0)
               .toUpperCase()}
           </div>
-          <div className="min-w-0 flex-1">
-            <div className="text-cell font-medium text-ink truncate">
-              {String(
-                auth.user.profile.preferred_username ||
-                  auth.user.profile.name ||
-                  auth.user.profile.email ||
-                  'user',
+          {!collapsed && (
+            <div className="min-w-0 flex-1">
+              <div className="text-cell font-medium text-ink truncate">
+                {String(
+                  auth.user.profile.preferred_username ||
+                    auth.user.profile.name ||
+                    auth.user.profile.email ||
+                    'user',
+                )}
+              </div>
+              {auth.user.profile.email && (
+                <div className="text-cell text-mute truncate">{String(auth.user.profile.email)}</div>
               )}
             </div>
-            {auth.user.profile.email && (
-              <div className="text-cell text-mute truncate">{String(auth.user.profile.email)}</div>
-            )}
-          </div>
+          )}
         </div>
       )}
+
+      {/* Collapse toggle — desktop only (mobile uses Sheet close ×) */}
+      {onToggleCollapsed && (
+        <button
+          type="button"
+          onClick={onToggleCollapsed}
+          aria-label={collapsed
+            ? t('sidebar.expand', { defaultValue: 'Развернуть' })
+            : t('sidebar.collapse', { defaultValue: 'Свернуть' })
+          }
+          title={collapsed ? t('sidebar.expand', { defaultValue: 'Развернуть' }) : t('sidebar.collapse', { defaultValue: 'Свернуть' })}
+          className={cn(
+            'border-t border-line shrink-0 h-8 flex items-center gap-2 text-cap text-mute hover:text-ink hover:bg-surface-2 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring',
+            collapsed ? 'justify-center' : 'px-4',
+          )}
+        >
+          <span aria-hidden>{collapsed ? '›' : '‹'}</span>
+          {!collapsed && (
+            <span>{t('sidebar.collapse', { defaultValue: 'Свернуть' })}</span>
+          )}
+        </button>
+      )}
     </>
   )
 }
@@ -271,7 +348,14 @@ export function MobileSidebar({ open, onClose }: { open: boolean; onClose: () =>
   )
 }
 
-function SidebarLink({ to, label, icon: Icon, badge, onClick }: NavItem & { onClick?: () => void }) {
+function SidebarLink({
+  to,
+  label,
+  icon: Icon,
+  badge,
+  onClick,
+  collapsed = false,
+}: NavItem & { onClick?: () => void; collapsed?: boolean }) {
   const location = useLocation()
   const active =
     to === '/'
@@ -282,27 +366,33 @@ function SidebarLink({ to, label, icon: Icon, badge, onClick }: NavItem & { onCl
     <Link
       to={to}
       onClick={onClick}
+      title={collapsed ? (typeof label === 'string' ? label : undefined) : undefined}
       className={cn(
         // text-body = 13px workhorse per handoff (см. styles.css @utility).
-        'group flex items-center gap-2.5 px-3 py-1.5 rounded-md text-body transition-colors',
+        'group flex items-center rounded-md text-body transition-colors',
+        collapsed ? 'justify-center h-9 mx-1' : 'gap-2.5 px-3 py-1.5',
         active
           ? 'bg-accent-bg text-accent font-medium'
           : 'text-ink-2 hover:text-ink hover:bg-surface-2',
       )}
     >
-      <Icon size={15} strokeWidth={1.75} className="shrink-0" />
-      <span className="flex-1 truncate">{label}</span>
-      {badge !== undefined && (
-        <span
-          className={cn(
-            'inline-flex items-center justify-center min-w-5 h-5 px-1.5 rounded-sm text-mono',
-            active
-              ? 'bg-accent text-on-accent'
-              : 'bg-surface-2 text-ink-2 group-hover:bg-line',
+      <Icon size={collapsed ? 18 : 15} strokeWidth={1.75} className="shrink-0" />
+      {!collapsed && (
+        <>
+          <span className="flex-1 truncate">{label}</span>
+          {badge !== undefined && (
+            <span
+              className={cn(
+                'inline-flex items-center justify-center min-w-5 h-5 px-1.5 rounded-sm text-mono',
+                active
+                  ? 'bg-accent text-on-accent'
+                  : 'bg-surface-2 text-ink-2 group-hover:bg-line',
+              )}
+            >
+              {badge}
+            </span>
           )}
-        >
-          {badge}
-        </span>
+        </>
       )}
     </Link>
   )