diff --git a/apps/internal-ui/src/features/chat/ChatPage.tsx b/apps/internal-ui/src/features/chat/ChatPage.tsx
index 731ee0f..c36efe5 100644
--- a/apps/internal-ui/src/features/chat/ChatPage.tsx
+++ b/apps/internal-ui/src/features/chat/ChatPage.tsx
@@ -1,5 +1,7 @@
 import { useState, type ReactNode } from "react";
 
+import { ChatMobileHeader } from "../../layout/ChatMobileHeader";
+
 import { ConversationWorkspace, type DialogScope } from "../conversations/ConversationWorkspace";
 import { DialogControls } from "../conversations/DialogControls";
 import type { ApiConversation, ConversationCounters } from "../conversations/model";
@@ -8,7 +10,7 @@ import { ClientContext } from "../sales/dialogs/context/ClientContext";
 import { HistoryContext } from "../sales/dialogs/context/HistoryContext";
 import { OperatorCards } from "../support/context/OperatorCards";
 import { SupportHistory } from "../support/context/SupportHistory";
-import type { EmployeeGroup, SessionUser } from "../../types";
+import type { EmployeeGroup, RouteKey, SessionUser } from "../../types";
 
 // Единый «Чат» (дизайн-базлайн v2 §8.1): один экран для всех диалогов
 // организации. Контекст-панель сама выбирает представление по источнику
@@ -25,6 +27,8 @@ export function ChatPage({
   setScope,
   counters,
   showScopeSwitcher,
+  setRoute,
+  onLogout,
 }: {
   initialConversationId?: number | null;
   user: SessionUser;
@@ -34,6 +38,8 @@ export function ChatPage({
   setScope: (scope: DialogScope) => void;
   counters: ConversationCounters | null;
   showScopeSwitcher: boolean;
+  setRoute: (route: RouteKey) => void;
+  onLogout: () => void;
 }) {
   const [rightTab, setRightTab] = useState<ChatRightTab>("client");
   return (
@@ -44,6 +50,7 @@ export function ChatPage({
       setScope={setScope}
       counters={counters}
       showScopeSwitcher={showScopeSwitcher}
+      mobileHeader={<ChatMobileHeader user={user} setRoute={setRoute} onLogout={onLogout} />}
       renderContextPanel={({ dialog, detail, applyConversation }) => (
         <ChatContextPanel
           rightTab={rightTab}
diff --git a/apps/internal-ui/src/features/conversations/ConversationThread.tsx b/apps/internal-ui/src/features/conversations/ConversationThread.tsx
index c2fd1f2..da1807e 100644
--- a/apps/internal-ui/src/features/conversations/ConversationThread.tsx
+++ b/apps/internal-ui/src/features/conversations/ConversationThread.tsx
@@ -15,7 +15,7 @@ function fmtTime(value: string): string {
   return new Date(value).toLocaleTimeString("ru-RU", { hour: "2-digit", minute: "2-digit" });
 }
 
-export function ConversationThread({ controlMode, dialog, detail, isOwner = false, onClaim, onCall, onClose, onSpam, onReturnQueue, onArchive, onToggleContext }: { controlMode: ControlMode; dialog: ConversationListItem | null; detail: ApiConversation | null; isOwner?: boolean; onClaim: () => void; onCall: (kind: "AUDIO" | "VIDEO") => void; onClose: () => void; onSpam: () => Promise<boolean>; onReturnQueue: () => void; onArchive: () => Promise<boolean>; onToggleContext?: () => void }) {
+export function ConversationThread({ controlMode, dialog, detail, isOwner = false, onClaim, onCall, onClose, onSpam, onReturnQueue, onArchive, onToggleContext, onMobileBack }: { controlMode: ControlMode; dialog: ConversationListItem | null; detail: ApiConversation | null; isOwner?: boolean; onClaim: () => void; onCall: (kind: "AUDIO" | "VIDEO") => void; onClose: () => void; onSpam: () => Promise<boolean>; onReturnQueue: () => void; onArchive: () => Promise<boolean>; onToggleContext?: () => void; onMobileBack?: () => void }) {
   const timelineRef = useRef<HTMLDivElement>(null);
   const messages = detail?.messages ?? [];
   const lastMessageId = messages.length ? messages[messages.length - 1].id : 0;
@@ -34,6 +34,8 @@ export function ConversationThread({ controlMode, dialog, detail, isOwner = fals
   return (
     <>
       <div className="sales-conversation-head">
+        {/* Кадр M2: на мобильном лента — отдельный экран, назад к списку. */}
+        {onMobileBack && <button className="mobile-back" type="button" aria-label="К списку диалогов" onClick={onMobileBack}><Icon name="arrow" size={19} /></button>}
         <div className="sales-conversation-person">
           <ContactAvatar avatarUrl={dialog.avatarUrl} initials={dialog.initials} background={dialog.avatarBg} className="sales-conversation-avatar" />
           <div>
diff --git a/apps/internal-ui/src/features/conversations/ConversationWorkspace.tsx b/apps/internal-ui/src/features/conversations/ConversationWorkspace.tsx
index fbb59a4..0b30d95 100644
--- a/apps/internal-ui/src/features/conversations/ConversationWorkspace.tsx
+++ b/apps/internal-ui/src/features/conversations/ConversationWorkspace.tsx
@@ -45,11 +45,12 @@ import { useIncomingMessageSound } from "./useIncomingMessageSound";
 // Общий workspace диалогов (SPEC-HUB-0010 §8.2). Видимость inbox решает
 // backend по группам (ADR-HUB-0043); страница параметризуется заголовком,
 // placeholder поиска и правой панелью через render-prop.
-export function ConversationWorkspace({ isOwner = false, listTitle, searchPlaceholder, renderContextPanel, initialConversationId, scope, setScope, counters, showScopeSwitcher = true }: {
+export function ConversationWorkspace({ isOwner = false, listTitle, searchPlaceholder, renderContextPanel, mobileHeader, initialConversationId, scope, setScope, counters, showScopeSwitcher = true }: {
   isOwner?: boolean;
   listTitle?: string;
   searchPlaceholder?: string;
   renderContextPanel: (ctx: { dialog: ConversationListItem | null; detail: ApiConversation | null; applyConversation: (updated: ApiConversation) => void }) => ReactNode;
+  mobileHeader?: ReactNode;
   initialConversationId?: number | null;
   // Охват (дерево фильтров) живёт в Shell: у сотрудника им управляет сайдбар,
   // у менеджера — поповер в заголовке списка.
@@ -61,6 +62,8 @@ export function ConversationWorkspace({ isOwner = false, listTitle, searchPlaceh
   const [listTab, setListTab] = useState<ListTab>("all");
   // Кадр S2: на ≤1024px контекст-панель — выдвижная поверх ленты.
   const [ctxOpen, setCtxOpen] = useState(false);
+  // Кадры M1/M2: на ≤768px список и лента — отдельные экраны.
+  const [mobileDialogOpen, setMobileDialogOpen] = useState(false);
   const [search, setSearch] = useState("");
   const [conversations, setConversations] = useState<ApiConversation[]>([]);
   const [listLoaded, setListLoaded] = useState(false);
@@ -174,7 +177,7 @@ export function ConversationWorkspace({ isOwner = false, listTitle, searchPlaceh
   };
 
   return (
-    <div className={`sales-dialogs ${ctxOpen ? "is-ctx-open" : ""}`}>
+    <div className={`sales-dialogs ${ctxOpen ? "is-ctx-open" : ""} ${mobileDialogOpen ? "is-mobile-dialog" : ""}`}>
       <DialogList
         scope={scope}
         counters={counters}
@@ -190,10 +193,14 @@ export function ConversationWorkspace({ isOwner = false, listTitle, searchPlaceh
         errorText={listError}
         setSearch={setSearch}
         setListTab={setListTab}
-        setSelectedId={setSelectedId}
+        setSelectedId={(id) => {
+          setSelectedId(id);
+          setMobileDialogOpen(true);
+        }}
+        mobileHeader={mobileHeader}
       />
       <section className="sales-conversation">
-        <ConversationThread controlMode={controlMode} dialog={selectedDialog} detail={detail} isOwner={isOwner} onClaim={onClaim} onCall={(kind) => void callController.start(kind)} onClose={onClose} onSpam={onSpam} onReturnQueue={onReturnQueue} onArchive={onArchive} onToggleContext={() => setCtxOpen((open) => !open)} />
+        <ConversationThread controlMode={controlMode} dialog={selectedDialog} detail={detail} isOwner={isOwner} onClaim={onClaim} onCall={(kind) => void callController.start(kind)} onClose={onClose} onSpam={onSpam} onReturnQueue={onReturnQueue} onArchive={onArchive} onToggleContext={() => setCtxOpen((open) => !open)} onMobileBack={() => setMobileDialogOpen(false)} />
         {(detailError || actionError) && <div className="sales-conversation-error">{detailError || actionError}</div>}
         <CallOverlay
           open={callController.open}
diff --git a/apps/internal-ui/src/features/conversations/DialogList.tsx b/apps/internal-ui/src/features/conversations/DialogList.tsx
index ca3b1a5..0ad4fe9 100644
--- a/apps/internal-ui/src/features/conversations/DialogList.tsx
+++ b/apps/internal-ui/src/features/conversations/DialogList.tsx
@@ -10,13 +10,14 @@ import type { ConversationCounters } from "./model";
 import type { ConversationListItem, ListTab } from "./types";
 import { SearchInput } from "../../shared/ui-controls";
 
-export function DialogList({ title = "Диалоги", searchPlaceholder = "Поиск по клиенту, продукту…", scope, counters, setScope, showScopeSwitcher = true, dialogs, filtered, listTab, selectedId, search, errorText, setSearch, setListTab, setSelectedId }: {
+export function DialogList({ title = "Диалоги", searchPlaceholder = "Поиск по клиенту, продукту…", scope, counters, setScope, showScopeSwitcher = true, mobileHeader, dialogs, filtered, listTab, selectedId, search, errorText, setSearch, setListTab, setSelectedId }: {
   title?: string;
   searchPlaceholder?: string;
   scope: DialogScope;
   counters: ConversationCounters | null;
   setScope: (scope: DialogScope) => void;
   showScopeSwitcher?: boolean;
+  mobileHeader?: ReactNode;
   dialogs: ConversationListItem[];
   filtered: ConversationListItem[];
   listTab: ListTab;
@@ -30,6 +31,7 @@ export function DialogList({ title = "Диалоги", searchPlaceholder = "По
   const waitCount = dialogs.filter((dialog) => dialog.mode === "wait").length;
   return (
     <section className="sales-dialog-list">
+      {mobileHeader}
       <div className="sales-dialog-list-head">
         <div>
           {showScopeSwitcher
@@ -46,6 +48,8 @@ export function DialogList({ title = "Диалоги", searchPlaceholder = "По
       </div>
       <div className="sales-dialog-list-body">
         {errorText && <div className="sales-wait-note sales-load-error">{errorText}</div>}
+        {/* Кадр S1: пустой список без призыва к действию. */}
+        {!errorText && dialogs.length === 0 && <div className="sales-wait-note">Диалоги появятся, когда клиенты напишут вашему агенту</div>}
         {filtered.map((dialog) => <DialogListItem dialog={dialog} active={dialog.id === selectedId} setSelectedId={setSelectedId} key={dialog.id} />)}
       </div>
     </section>
diff --git a/apps/internal-ui/src/features/sales/dialogs/layout.css b/apps/internal-ui/src/features/sales/dialogs/layout.css
index 526a6e7..d39ab69 100644
--- a/apps/internal-ui/src/features/sales/dialogs/layout.css
+++ b/apps/internal-ui/src/features/sales/dialogs/layout.css
@@ -52,3 +52,94 @@
     display: flex;
   }
 }
+
+/* Кадры M1/M2 (≤768px): список и лента — отдельные экраны; сайдбар скрыт,
+   шапка бренда живёт в списке. */
+@media (max-width: 768px) {
+  .hub-shell.is-chat-route .hub-sidebar {
+    display: none;
+  }
+
+  .sales-dialogs .sales-dialog-list {
+    width: 100%;
+    border-right: 0;
+  }
+
+  .sales-dialogs .sales-conversation {
+    display: none;
+  }
+
+  .sales-dialogs.is-mobile-dialog .sales-dialog-list {
+    display: none;
+  }
+
+  .sales-dialogs.is-mobile-dialog .sales-conversation {
+    display: flex;
+  }
+
+  .sales-dialogs .sales-context {
+    width: min(320px, 100%);
+  }
+
+  .sales-conversation-head .mobile-back {
+    display: flex;
+  }
+}
+
+.sales-conversation-head .mobile-back {
+  display: none;
+  align-items: center;
+  justify-content: center;
+  width: 36px;
+  height: 36px;
+  flex: none;
+  border: 0;
+  border-radius: 8px;
+  color: var(--n-3);
+  background: transparent;
+}
+
+.sales-conversation-head .mobile-back svg {
+  transform: rotate(180deg);
+}
+
+/* Мобильная шапка списка (кадр M1). */
+.chat-mobile-header {
+  display: none;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+  padding: 10px 14px 4px;
+}
+
+.chat-mobile-brand {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  min-width: 0;
+  border: 0;
+  padding: 0;
+  background: transparent;
+  color: var(--n-1);
+  font-size: 14.5px;
+  font-weight: 700;
+}
+
+.chat-mobile-brand strong {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.chat-mobile-avatar {
+  border: 0;
+  padding: 0;
+  flex: none;
+  background: transparent;
+}
+
+@media (max-width: 768px) {
+  .chat-mobile-header {
+    display: flex;
+  }
+}
diff --git a/apps/internal-ui/src/layout/ChatMobileHeader.tsx b/apps/internal-ui/src/layout/ChatMobileHeader.tsx
new file mode 100644
index 0000000..8f3d8f8
--- /dev/null
+++ b/apps/internal-ui/src/layout/ChatMobileHeader.tsx
@@ -0,0 +1,33 @@
+import { Dropdown } from "antd";
+import { useState } from "react";
+
+import type { RouteKey, SessionUser } from "../types";
+import { Icon, LogoIcon } from "../shared/icons";
+import { Avatar } from "../shared/ui";
+import { defaultRoute } from "../auth/access";
+
+// Мобильная шапка экрана списка (дизайн-базлайн v2, кадр M1): логотип +
+// организация слева, аватар с меню профиля справа. Видна только на ≤768px —
+// сайдбар на мобильном чате скрыт.
+export function ChatMobileHeader({ user, setRoute, onLogout }: { user: SessionUser; setRoute: (route: RouteKey) => void; onLogout: () => void }) {
+  const [open, setOpen] = useState(false);
+  const menuItems = [
+    { key: "profile", label: <button type="button" onClick={() => setRoute("profile")}><Icon name="user" size={15} />Профиль</button> },
+    { key: "settings", label: <button type="button" onClick={() => setRoute("settings")}><Icon name="settings" size={15} />Настройки</button> },
+    { type: "divider" as const },
+    { key: "logout", label: <button type="button" className="danger" onClick={onLogout}><Icon name="logout" size={15} />Выйти</button> },
+  ];
+  return (
+    <div className="chat-mobile-header">
+      <button className="chat-mobile-brand" type="button" onClick={() => setRoute(defaultRoute(user))}>
+        <span className={`hub-brand-mark ${user.organizationLogoUrl ? "has-logo" : ""}`}>
+          {user.organizationLogoUrl ? <img src={user.organizationLogoUrl} alt="" /> : <LogoIcon />}
+        </span>
+        <strong>{user.organizationName || "Chatbolls"}</strong>
+      </button>
+      <Dropdown menu={{ items: menuItems }} open={open} onOpenChange={setOpen} trigger={["click"]} placement="bottomRight" overlayClassName="app-dropdown is-wide">
+        <button className="chat-mobile-avatar" type="button" aria-label="Меню пользователя"><Avatar user={user} /></button>
+      </Dropdown>
+    </div>
+  );
+}
diff --git a/apps/internal-ui/src/layout/Shell.tsx b/apps/internal-ui/src/layout/Shell.tsx
index bed23a0..f9fcd83 100644
--- a/apps/internal-ui/src/layout/Shell.tsx
+++ b/apps/internal-ui/src/layout/Shell.tsx
@@ -95,7 +95,7 @@ export function Shell({ route, setRoute, selectedEmployeeId, selectedProductCode
   const isKnowledgeLibrary = route === "aiKnowledge";
   const isKnowledgeEditor = route === "aiKnowledgeCreate" || route === "aiKnowledgeDetail";
   return (
-    <div className="hub-shell">
+    <div className={`hub-shell ${isDialogsWorkspace ? "is-chat-route" : ""}`}>
       <Sidebar route={route} user={user} setRoute={setRoute} onLogout={onLogout} waitingCount={waitingCount} chatScope={chatScope.scope} setChatScope={chatScope.setScope} chatCounters={chatScope.counters} />
       <div className="hub-main">
         {/* У сотрудника верхней панели нет (дизайн-базлайн v2 §4.1). */}
diff --git a/apps/internal-ui/src/layout/ShellRouteContent.tsx b/apps/internal-ui/src/layout/ShellRouteContent.tsx
index be362f6..c20d769 100644
--- a/apps/internal-ui/src/layout/ShellRouteContent.tsx
+++ b/apps/internal-ui/src/layout/ShellRouteContent.tsx
@@ -58,6 +58,8 @@ export function ShellRouteContent({ chatScope, setChatScope, chatCounters, chatS
           setScope={setChatScope}
           counters={chatCounters}
           showScopeSwitcher={chatScopeSwitcher}
+          setRoute={setRoute}
+          onLogout={onLogout}
         />
       )}
       {route === "agents" && <AgentsPage agents={data.agents} groups={data.groups} reload={reload} openAgent={openAgent} />}