diff --git a/client/src/components/Layout/navItems.hook.test.tsx b/client/src/components/Layout/navItems.hook.test.tsx
index 82aea2a4c..900ef8173 100644
--- a/client/src/components/Layout/navItems.hook.test.tsx
+++ b/client/src/components/Layout/navItems.hook.test.tsx
@@ -1,11 +1,13 @@
-// FE-W4NAVH-001 to FE-W4NAVH-005
+// FE-W4NAVH-001 to FE-W4NAVH-008
 import { describe, it, expect, beforeEach } from 'vitest'
-import { CalendarDays, Globe, LayoutGrid } from 'lucide-react'
+import { CalendarDays, Globe, LayoutGrid, Sparkles } from 'lucide-react'
 import { renderHook } from '@testing-library/react'
 import { TranslationProvider } from '../../i18n/TranslationContext'
 import { useAddonStore } from '../../store/addonStore'
 import { usePluginStore } from '../../store/pluginStore'
-import { useNavItems } from './navItems'
+import { useAssistantStore } from '../../store/assistantStore'
+import type { AiStatusResponse } from '@trek/shared'
+import { useDockNavItems, useNavItems } from './navItems'
 
 function wrapper({ children }: { children: React.ReactNode }) {
   return <TranslationProvider>{children}</TranslationProvider>
@@ -16,6 +18,7 @@ const render = () => renderHook(() => useNavItems(), { wrapper })
 beforeEach(() => {
   useAddonStore.setState({ addons: [] })
   usePluginStore.setState({ plugins: [] })
+  useAssistantStore.setState({ status: null })
 })
 
 describe('useNavItems', () => {
@@ -77,3 +80,33 @@ describe('useNavItems', () => {
     expect(result.current).toBe(first)
   })
 })
+
+describe('useDockNavItems', () => {
+  const renderDock = () => renderHook(() => useDockNavItems(), { wrapper })
+  const assistantAddon = (enabled: boolean) =>
+    useAddonStore.setState({ addons: [{ id: 'ai_assistant', name: 'AI assistant', icon: 'Sparkles', type: 'integration', enabled }] as never })
+
+  it('FE-W4NAVH-006: adds the assistant after the pages while its addon is on and it can run', () => {
+    assistantAddon(true)
+    useAssistantStore.setState({ status: { available: true } as AiStatusResponse })
+
+    const { result } = renderDock()
+
+    expect(result.current.map(i => i.id)).toEqual(['dashboard', 'assistant'])
+    expect(result.current[1]).toMatchObject({ to: '', label: 'Assistant', icon: Sparkles })
+  })
+
+  it('FE-W4NAVH-007: leaves it out while the addon is off', () => {
+    assistantAddon(false)
+    useAssistantStore.setState({ status: { available: true } as AiStatusResponse })
+
+    expect(renderDock().result.current.map(i => i.id)).toEqual(['dashboard'])
+  })
+
+  it('FE-W4NAVH-008: leaves it out while it cannot run for this user', () => {
+    assistantAddon(true)
+    useAssistantStore.setState({ status: { available: false } as AiStatusResponse })
+
+    expect(renderDock().result.current.map(i => i.id)).toEqual(['dashboard'])
+  })
+})
diff --git a/client/src/components/Layout/navItems.ts b/client/src/components/Layout/navItems.ts
index 9cc34db93..7c3393f2d 100644
--- a/client/src/components/Layout/navItems.ts
+++ b/client/src/components/Layout/navItems.ts
@@ -1,7 +1,8 @@
 import { useMemo } from 'react'
-import { LayoutGrid, CalendarDays, Globe, Compass, Bookmark, type LucideIcon } from 'lucide-react'
+import { LayoutGrid, CalendarDays, Globe, Compass, Bookmark, Sparkles, type LucideIcon } from 'lucide-react'
 import { useTranslation } from '../../i18n'
 import { useAddonStore } from '../../store/addonStore'
+import { useAssistantStore } from '../../store/assistantStore'
 import { usePluginStore } from '../../store/pluginStore'
 import { resolvePluginIcon } from '../shared/PluginIcon'
 
@@ -12,16 +13,21 @@ import { resolvePluginIcon } from '../shared/PluginIcon'
  *
  * Stable ids used for persistence: `'dashboard'` (pinned), an enabled global
  * addon's id (vacay|atlas|journey|collections|future), or `'plugin:<id>'` for a
- * page plugin. Dashboard is always first and immovable.
+ * page plugin. Dashboard is always first and immovable. The mobile dock adds
+ * `'assistant'` (see useDockNavItems).
  */
 export interface NavItemDef {
   id: string
+  /** The page it opens; empty for the assistant, which opens the home chat instead. */
   to: string
   label: string
   icon: LucideIcon
   pinned?: boolean
 }
 
+/** The home assistant's entry in the mobile dock: a chat it opens, not a page. */
+export const ASSISTANT_NAV_ID = 'assistant'
+
 // Signature glyphs for the four catalog global addons, keyed by id so the known
 // nav items keep their icon regardless of the (string) icon the addon row ships;
 // any future/unknown global addon resolves through its manifest icon name.
@@ -33,7 +39,7 @@ const ADDON_ICONS: Record<string, LucideIcon> = {
 }
 
 /** The bar holds Dashboard + at most this many custom items; the rest go to More.
- * Two keeps the dock at 3 destinations (Dashboard + 2) so the More slot still fits. */
+ * Two keeps the dock at 3 entries (Dashboard + 2) so the More slot still fits. */
 export const MOBILE_NAV_MAX_BAR = 2
 /**
  * The built-in dock next to Dashboard for an un-customised account, in priority
@@ -44,9 +50,11 @@ export const MOBILE_NAV_MAX_BAR = 2
  * to every day, not the map of countries it already visited. Journey ships
  * disabled though, so an instance that never turned it on keeps the Vacay/Atlas
  * dock it has today. Listing all four known global addons rather than just the
- * top two also keeps the dock filled when one of them is switched off.
+ * top two also keeps the dock filled when one of them is switched off. The
+ * assistant comes last: it takes a slot only one of the addons left free, rather
+ * than sitting alone behind the More button.
  */
-export const DEFAULT_DOCK_IDS = ['vacay', 'journey', 'atlas', 'collections']
+export const DEFAULT_DOCK_IDS = ['vacay', 'journey', 'atlas', 'collections', ASSISTANT_NAV_ID]
 
 export function buildNavItems(
   globalAddons: { id: string; name: string; icon: string }[],
@@ -90,6 +98,26 @@ export function useNavItems(): NavItemDef[] {
   )
 }
 
+/**
+ * The entries the mobile dock arranges: the nav items, and the home assistant
+ * while its addon is on and it can run for this user. The settings customizer
+ * sorts the same list, so the assistant can go into the bar or under More.
+ */
+export function useDockNavItems(): NavItemDef[] {
+  const { t } = useTranslation()
+  const items = useNavItems()
+  const addonOn = useAddonStore((s) => s.isEnabled('ai_assistant'))
+  const available = useAssistantStore((s) => s.status?.available === true)
+  const withAssistant = addonOn && available
+  return useMemo(
+    () =>
+      withAssistant
+        ? [...items, { id: ASSISTANT_NAV_ID, to: '', label: t('assistant.launcher.tooltip'), icon: Sparkles }]
+        : items,
+    [items, withAssistant, t],
+  )
+}
+
 export interface MobileNavSplit {
   /** Items shown directly in the dock, Dashboard first. */
   bar: NavItemDef[]
diff --git a/client/src/components/Settings/useMobileNavEditor.ts b/client/src/components/Settings/useMobileNavEditor.ts
index 7b4b6184a..a96877306 100644
--- a/client/src/components/Settings/useMobileNavEditor.ts
+++ b/client/src/components/Settings/useMobileNavEditor.ts
@@ -1,4 +1,4 @@
-import { useNavItems, splitMobileNav, MOBILE_NAV_MAX_BAR, type NavItemDef } from '../Layout/navItems'
+import { useDockNavItems, splitMobileNav, MOBILE_NAV_MAX_BAR, type NavItemDef } from '../Layout/navItems'
 
 export interface MobileNavValue {
   bar: string[]
@@ -36,7 +36,7 @@ export function useMobileNavEditor(
   value: MobileNavValue,
   onChange: (next: MobileNavValue) => void,
 ): MobileNavEditor {
-  const items = useNavItems()
+  const items = useDockNavItems()
   const split = splitMobileNav(items, value)
   const dashboard = split.bar.find((i) => i.id === 'dashboard')
   const barItems = split.bar.filter((i) => i.id !== 'dashboard')
diff --git a/client/src/mobile/components/MBottomNav.test.tsx b/client/src/mobile/components/MBottomNav.test.tsx
index 82a9a8346..ff88f484c 100644
--- a/client/src/mobile/components/MBottomNav.test.tsx
+++ b/client/src/mobile/components/MBottomNav.test.tsx
@@ -1,4 +1,4 @@
-// FE-COMP-MBOTTOMNAV-001 to FE-COMP-MBOTTOMNAV-008
+// FE-COMP-MBOTTOMNAV-001 to FE-COMP-MBOTTOMNAV-011
 
 vi.mock('../../api/websocket', () => ({
   connect: vi.fn(),
@@ -23,11 +23,19 @@ import { useAddonStore } from '../../store/addonStore';
 import { resetAllStores, seedStore } from '../../../tests/helpers/store';
 import { buildUser } from '../../../tests/helpers/factories';
 import { useAssistantStore } from '../../store/assistantStore';
+import { useSettingsStore } from '../../store/settingsStore';
 import type { AiStatusResponse } from '@trek/shared';
 import MBottomNav from './MBottomNav';
 
 const currentUser = buildUser({ id: 1, username: 'testuser', email: 'test@example.com' });
 
+const vacay = { id: 'vacay', name: 'Vacay', type: 'global', icon: 'calendar', enabled: true };
+const atlas = { id: 'atlas', name: 'Atlas', type: 'global', icon: 'globe', enabled: true };
+const assistantAddon = { id: 'ai_assistant', name: 'AI assistant', type: 'integration', icon: 'sparkles', enabled: true };
+
+const withAssistant = () =>
+  useAssistantStore.setState({ status: { available: true } as AiStatusResponse, window: { open: false, minimized: false } });
+
 const withCollections = () =>
   seedStore(useAddonStore, {
     addons: [{ id: 'collections', name: 'Collections', type: 'global', icon: 'bookmark', enabled: true }],
@@ -40,6 +48,10 @@ beforeEach(() => {
   seedStore(useAuthStore, { user: currentUser, isAuthenticated: true });
 });
 
+afterEach(() => {
+  useAssistantStore.setState({ status: null, window: { open: false, minimized: false } });
+});
+
 describe('MBottomNav', () => {
   it('FE-COMP-MBOTTOMNAV-001: the dock "+" creates a trip on an unclaimed route', async () => {
     const user = userEvent.setup();
@@ -100,14 +112,46 @@ describe('MBottomNav', () => {
     expect(screen.queryByRole('button', { name: 'New Trip' })).not.toBeInTheDocument();
   });
 
-  it('FE-COMP-MBOTTOMNAV-008: the More list leads with the assistant while it can run, and opens the home chat', async () => {
+  it('FE-COMP-MBOTTOMNAV-008: the assistant takes a free dock slot, so More does not hold it alone', async () => {
     const user = userEvent.setup();
-    useAssistantStore.setState({ status: { available: true } as AiStatusResponse, window: { open: false, minimized: false } });
+    withAssistant();
+    seedStore(useAddonStore, { addons: [atlas, assistantAddon] });
+    render(<MBottomNav />, { initialEntries: ['/atlas'] });
+    expect(screen.queryByRole('button', { name: 'More' })).not.toBeInTheDocument();
+    await user.click(screen.getByRole('button', { name: 'Assistant' }));
+    expect(useAssistantStore.getState().window).toEqual({ open: true, minimized: false });
+    expect(mockNavigate).not.toHaveBeenCalled();
+  });
+
+  it('FE-COMP-MBOTTOMNAV-009: with the dock full the assistant waits under More, and opens the home chat from there', async () => {
+    const user = userEvent.setup();
+    withAssistant();
+    seedStore(useAddonStore, { addons: [vacay, atlas, assistantAddon] });
     render(<MBottomNav />, { initialEntries: ['/atlas'] });
     await user.click(screen.getByRole('button', { name: 'More' }));
     await user.click(screen.getByRole('button', { name: 'Assistant' }));
     expect(useAssistantStore.getState().window).toEqual({ open: true, minimized: false });
     expect(mockNavigate).not.toHaveBeenCalled();
-    useAssistantStore.setState({ status: null, window: { open: false, minimized: false } });
+  });
+
+  it('FE-COMP-MBOTTOMNAV-010: the assistant goes where the settings put it', () => {
+    withAssistant();
+    seedStore(useAddonStore, { addons: [vacay, atlas, assistantAddon] });
+    seedStore(useSettingsStore, {
+      settings: { ...useSettingsStore.getState().settings, appearance: { mobileNav: { bar: ['assistant', 'atlas'], more: ['vacay'] } } },
+    });
+    render(<MBottomNav />, { initialEntries: ['/atlas'] });
+    expect(screen.getByRole('button', { name: 'Assistant' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Atlas' })).toBeInTheDocument();
+    expect(screen.queryByRole('button', { name: 'Vacay' })).not.toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'More' })).toBeInTheDocument();
+  });
+
+  it('FE-COMP-MBOTTOMNAV-011: no assistant entry while its addon is off', () => {
+    withAssistant();
+    seedStore(useAddonStore, { addons: [atlas, { ...assistantAddon, enabled: false }] });
+    render(<MBottomNav />, { initialEntries: ['/atlas'] });
+    expect(screen.queryByRole('button', { name: 'Assistant' })).not.toBeInTheDocument();
+    expect(screen.queryByRole('button', { name: 'More' })).not.toBeInTheDocument();
   });
 });
diff --git a/client/src/mobile/components/MBottomNav.tsx b/client/src/mobile/components/MBottomNav.tsx
index 3471cad34..bb70b1a79 100644
--- a/client/src/mobile/components/MBottomNav.tsx
+++ b/client/src/mobile/components/MBottomNav.tsx
@@ -2,17 +2,14 @@ import { useEffect, useState } from 'react'
 import { useNavigate, useLocation, matchPath } from 'react-router'
 import { useSettingsStore } from '../../store/settingsStore'
 import { useTranslation } from '../../i18n'
-import { ChevronRight, MoreHorizontal, Plus, Search, Sparkles, Upload } from 'lucide-react'
-import type { LucideIcon } from 'lucide-react'
+import { ChevronRight, MoreHorizontal, Plus, Search, Upload } from 'lucide-react'
 import { normalizeAppearance } from '@trek/shared'
-import { useNavItems, splitMobileNav } from '../../components/Layout/navItems'
+import { useDockNavItems, splitMobileNav, ASSISTANT_NAV_ID, type NavItemDef } from '../../components/Layout/navItems'
 import { isNavItemActive, useCreateAction } from '../../components/Layout/useCreateAction'
 import MFab from './MFab'
 import { useAssistantHomeLauncher } from '../../components/Assistant/useAssistantHome'
 import MDockScrim from './MDockScrim'
 
-interface NavItem { to: string; label: string; icon: LucideIcon }
-
 /**
  * Floating glass dock of the mobile shell. Same tab/gating/"+" logic as the
  * legacy BottomNav (addons, ?create= contract), redesigned as the demo's icon
@@ -28,7 +25,8 @@ export default function MBottomNav() {
   // the dock yields the slot instead (see screenFabSlot below, #1811).
   const create = useCreateAction(true)
   const [moreOpen, setMoreOpen] = useState(false)
-  // The home chat leads the More list on every page outside a trip, as the assistant tile leads a trip's.
+  // The home chat, an entry of the dock like the pages (useDockNavItems): sorted
+  // into the bar or under More in the settings, there only while it can run.
   const assistant = useAssistantHomeLauncher()
 
   // Close the popover when the route changes underneath it (browser back etc.).
@@ -37,20 +35,21 @@ export default function MBottomNav() {
   // The dock split + order is user-configurable (Settings → Appearance → Mobile);
   // an un-customised account falls back to the built-in Dashboard + vacay/atlas
   // dock with everything else under "More".
-  const navItems = useNavItems()
+  const navItems = useDockNavItems()
   const appearance = useSettingsStore(s => s.settings.appearance)
   const split = splitMobileNav(navItems, normalizeAppearance(appearance).mobileNav)
 
-  const dockItems: NavItem[] = split.bar
-  const moreItems: NavItem[] = split.more
+  const dockItems = split.bar
+  const moreItems = split.more
 
-  const isActive = (to: string) => isNavItemActive(location.pathname, to)
-  const moreActive = moreItems.some(item => isActive(item.to))
-  const moreRows = [
-    ...(assistant.available ? [{ key: 'assistant', label: t('assistant.launcher.tooltip'), icon: Sparkles, go: assistant.open }] : []),
-    ...moreItems.map(({ to, label, icon }) => ({ key: to, label, icon, go: () => navigate(to) })),
-  ]
-  const hasMore = moreRows.length > 0
+  const isAssistant = (item: NavItemDef) => item.id === ASSISTANT_NAV_ID
+  const isActive = (item: NavItemDef) => !isAssistant(item) && isNavItemActive(location.pathname, item.to)
+  const open = (item: NavItemDef): void => {
+    if (isAssistant(item)) assistant.open()
+    else void navigate(item.to)
+  }
+  const moreActive = moreItems.some(isActive)
+  const hasMore = moreItems.length > 0
 
   // The FAB gives way to a decorative logo slot on screens without an add
   // action (settings/admin, demo Z. 1372/1429).
@@ -82,16 +81,17 @@ export default function MBottomNav() {
   // A map runs to the screen's edge on purpose; everything else fades out under the dock.
   const overMap = location.pathname.startsWith('/atlas') || matchPath('/journey/:id', location.pathname) !== null
 
-  const renderItem = ({ to, label, icon: Icon }: NavItem) => {
-    const active = isActive(to)
+  const renderItem = (item: NavItemDef) => {
+    const { id, label, icon: Icon } = item
+    const active = isActive(item)
     // Fixed sizes per slot (demo): the dashboard grid is 18/2.1, every other
     // slot 21/1.9 — independent of the active state.
-    const dash = to === '/dashboard'
+    const dash = id === 'dashboard'
     return (
       <button
-        key={to}
+        key={id}
         type="button"
-        onClick={() => navigate(to)}
+        onClick={() => open(item)}
         aria-label={label}
         aria-current={active ? 'page' : undefined}
         className={circleCls(active)}
@@ -111,17 +111,17 @@ export default function MBottomNav() {
             role="presentation"
             onClick={e => e.stopPropagation()}
           >
-            {moreRows.map(({ key, label, icon: Icon, go }) => (
+            {moreItems.map((item) => (
               <button
-                key={key}
+                key={item.id}
                 type="button"
-                onClick={() => { setMoreOpen(false); go() }}
+                onClick={() => { setMoreOpen(false); open(item) }}
                 className="flex items-center gap-[13px] rounded-[18px] bg-[color:var(--m-ic)] px-4 py-[14px] text-start"
               >
                 <span className="flex h-10 w-10 flex-none items-center justify-center rounded-xl bg-[color:var(--m-ic)] text-m-ink">
-                  <Icon size={20} strokeWidth={2} />
+                  <item.icon size={20} strokeWidth={2} />
                 </span>
-                <span className="block min-w-0 flex-1 truncate text-[0.9375rem] font-extrabold text-m-ink">{label}</span>
+                <span className="block min-w-0 flex-1 truncate text-[0.9375rem] font-extrabold text-m-ink">{item.label}</span>
                 <ChevronRight size={17} strokeWidth={2} className="flex-none text-m-faint" />
               </button>
             ))}