fix: translate mobile bottom-nav tab labels (issue #931)

Replaced hardcoded English labels in BottomNav with t() lookups using the same translation keys as the desktop navbar (nav.myTrips, admin.addons.catalog.*.name).

client/src/components/Layout/BottomNav.test.tsx

@@ -19,8 +19,10 @@ vi.mock('react-router-dom', async () => {
 import { render, screen, fireEvent } from '../../../tests/helpers/render';
 import userEvent from '@testing-library/user-event';
 import { useAuthStore } from '../../store/authStore';
+import { useSettingsStore } from '../../store/settingsStore';
+import { useAddonStore } from '../../store/addonStore';
 import { resetAllStores, seedStore } from '../../../tests/helpers/store';
-import { buildUser } from '../../../tests/helpers/factories';
+import { buildUser, buildSettings } from '../../../tests/helpers/factories';
 import BottomNav from './BottomNav';
 
 const currentUser = buildUser({ id: 1, username: 'testuser', email: 'test@example.com' });
@@ -39,7 +41,7 @@ describe('BottomNav', () => {
 
   it('FE-COMP-BOTTOMNAV-002: shows Trips nav link', () => {
     render(<BottomNav />);
-    expect(screen.getByText('Trips')).toBeInTheDocument();
+    expect(screen.getByText('My Trips')).toBeInTheDocument();
   });
 
   it('FE-COMP-BOTTOMNAV-003: shows Profile button', () => {
@@ -99,4 +101,39 @@ describe('BottomNav', () => {
     // Sheet should be closed — username no longer visible (only the nav Profile text remains)
     expect(screen.queryByText('testuser')).not.toBeInTheDocument();
   });
+
+  it('FE-COMP-BOTTOMNAV-010: Trips label translates when language is fr', () => {
+    seedStore(useSettingsStore, { settings: buildSettings({ language: 'fr' }) });
+    render(<BottomNav />);
+    expect(screen.getByText('Mes voyages')).toBeInTheDocument();
+  });
+
+  it('FE-COMP-BOTTOMNAV-011: Profile label translates when language is fr', () => {
+    seedStore(useSettingsStore, { settings: buildSettings({ language: 'fr' }) });
+    render(<BottomNav />);
+    expect(screen.getByText('Profil')).toBeInTheDocument();
+  });
+
+  it('FE-COMP-BOTTOMNAV-012: addon labels translate when language is fr', () => {
+    seedStore(useSettingsStore, { settings: buildSettings({ language: 'fr' }) });
+    seedStore(useAddonStore, {
+      addons: [
+        { id: 'vacay', name: 'Vacay', type: 'global', icon: 'calendar', enabled: true },
+        { id: 'atlas', name: 'Atlas', type: 'global', icon: 'globe', enabled: true },
+        { id: 'journey', name: 'Journey', type: 'global', icon: 'compass', enabled: true },
+      ],
+    });
+    render(<BottomNav />);
+    expect(screen.getByText('Vacances')).toBeInTheDocument();
+    expect(screen.getByText('Atlas')).toBeInTheDocument();
+    expect(screen.getByText('Journal de voyage')).toBeInTheDocument();
+  });
+
+  it('FE-COMP-BOTTOMNAV-013: unknown addon id is not rendered', () => {
+    seedStore(useAddonStore, {
+      addons: [{ id: 'foo', name: 'Foo Addon', type: 'global', icon: 'star', enabled: true }],
+    });
+    render(<BottomNav />);
+    expect(screen.queryByText('Foo Addon')).not.toBeInTheDocument();
+  });
 });

client/src/components/Layout/BottomNav.tsx

@@ -7,14 +7,10 @@ import { useTranslation } from '../../i18n'
 import { Plane, CalendarDays, Globe, Compass, User, Settings, Shield, LogOut, X } from 'lucide-react'
 import type { LucideIcon } from 'lucide-react'
 
-const BASE_ITEMS: { to: string; label: string; icon: LucideIcon; addonId?: string }[] = [
-  { to: '/trips', label: 'Trips', icon: Plane },
-]
-
-const ADDON_NAV: Record<string, { to: string; label: string; icon: LucideIcon }> = {
-  vacay: { to: '/vacay', label: 'Vacay', icon: CalendarDays },
-  atlas: { to: '/atlas', label: 'Atlas', icon: Globe },
-  journey: { to: '/journey', label: 'Journey', icon: Compass },
+const ADDON_NAV: Record<string, { icon: LucideIcon; labelKey: string }> = {
+  vacay:   { icon: CalendarDays, labelKey: 'admin.addons.catalog.vacay.name' },
+  atlas:   { icon: Globe,        labelKey: 'admin.addons.catalog.atlas.name' },
+  journey: { icon: Compass,      labelKey: 'admin.addons.catalog.journey.name' },
 }
 
 export default function BottomNav() {
@@ -25,11 +21,13 @@ export default function BottomNav() {
   const globalAddons = addons.filter(a => a.type === 'global' && a.enabled)
   const [showProfile, setShowProfile] = useState(false)
 
-  const items = [...BASE_ITEMS]
-  for (const addon of globalAddons) {
-    const nav = ADDON_NAV[addon.id]
-    if (nav) items.push(nav)
-  }
+  const items: { to: string; label: string; icon: LucideIcon }[] = [
+    { to: '/trips', label: t('nav.myTrips'), icon: Plane },
+    ...globalAddons.flatMap(addon => {
+      const nav = ADDON_NAV[addon.id]
+      return nav ? [{ to: `/${addon.id}`, label: t(nav.labelKey), icon: nav.icon }] : []
+    }),
+  ]
 
   return (
     <>

client/src/components/Map/MapView.test.tsx

@@ -7,6 +7,16 @@ import { resetAllStores } from '../../../tests/helpers/store'
 import { buildPlace } from '../../../tests/helpers/factories'
 import * as photoService from '../../services/photoService'
 
+const mapMock = vi.hoisted(() => ({
+  panTo: vi.fn(),
+  setView: vi.fn(),
+  fitBounds: vi.fn(),
+  getZoom: vi.fn().mockReturnValue(10),
+  on: vi.fn(),
+  off: vi.fn(),
+  panBy: vi.fn(),
+}))
+
 vi.mock('react-leaflet', () => ({
   MapContainer: ({ children }: any) => <div data-testid="map-container">{children}</div>,
   TileLayer: () => <div data-testid="tile-layer" />,
@@ -27,15 +37,7 @@ vi.mock('react-leaflet', () => ({
   Polyline: ({ positions }: any) => <div data-testid="polyline" data-points={JSON.stringify(positions)} />,
   CircleMarker: () => <div data-testid="circle-marker" />,
   Circle: () => <div data-testid="circle" />,
-  useMap: () => ({
-    panTo: vi.fn(),
-    setView: vi.fn(),
-    fitBounds: vi.fn(),
-    getZoom: () => 10,
-    on: vi.fn(),
-    off: vi.fn(),
-    panBy: vi.fn(),
-  }),
+  useMap: () => mapMock,
   useMapEvents: () => ({}),
 }))
 
@@ -79,6 +81,7 @@ function buildMapPlace(overrides: Record<string, any> = {}) {
 }
 
 afterEach(() => {
+  vi.clearAllMocks()
   resetAllStores()
 })
 
@@ -216,4 +219,33 @@ describe('MapView', () => {
     render(<MapView places={places} selectedPlaceId={5} />)
     expect(screen.getByTestId('marker')).toBeTruthy()
   })
+
+  it('FE-COMP-MAPVIEW-018: changing selectedPlaceId/hasInspector does not refit bounds (issue #921)', () => {
+    const places = [
+      buildMapPlace({ id: 1, lat: 48.8584, lng: 2.2945 }),
+      buildMapPlace({ id: 2, lat: 48.86, lng: 2.337 }),
+    ]
+    const { rerender } = render(<MapView places={places} fitKey={1} selectedPlaceId={null} hasInspector={false} />)
+    const initialCount = mapMock.fitBounds.mock.calls.length
+
+    // Toggle selectedPlaceId on — mimics opening place inspector (hasInspector flips,
+    // paddingOpts memo creates new object). fitBounds must NOT fire again.
+    rerender(<MapView places={places} fitKey={1} selectedPlaceId={1} hasInspector={true} />)
+    expect(mapMock.fitBounds).toHaveBeenCalledTimes(initialCount)
+
+    // Toggle selectedPlaceId off — mimics closing inspector via X button.
+    rerender(<MapView places={places} fitKey={1} selectedPlaceId={null} hasInspector={false} />)
+    expect(mapMock.fitBounds).toHaveBeenCalledTimes(initialCount)
+  })
+
+  it('FE-COMP-MAPVIEW-019: bumping fitKey triggers a new fitBounds call', () => {
+    const places = [
+      buildMapPlace({ id: 1, lat: 48.8584, lng: 2.2945 }),
+    ]
+    const { rerender } = render(<MapView places={places} fitKey={1} />)
+    const afterFirst = mapMock.fitBounds.mock.calls.length
+
+    rerender(<MapView places={places} fitKey={2} />)
+    expect(mapMock.fitBounds.mock.calls.length).toBeGreaterThan(afterFirst)
+  })
 })

client/src/components/Map/MapView.tsx

@@ -186,7 +186,7 @@ function BoundsController({ places, fitKey, paddingOpts, hasDayDetail }: BoundsC
         }
       }
     } catch {}
-  }, [fitKey, places, paddingOpts, map, hasDayDetail])
+  }, [fitKey]) // eslint-disable-line react-hooks/exhaustive-deps
 
   return null
 }
@@ -233,18 +233,7 @@ interface RouteLabelProps {
 }
 
 function RouteLabel({ midpoint, walkingText, drivingText }: RouteLabelProps) {
-  const map = useMap()
-  const [visible, setVisible] = useState(map ? map.getZoom() >= 12 : false)
-
-  useEffect(() => {
-    if (!map) return
-    const check = () => setVisible(map.getZoom() >= 12)
-    check()
-    map.on('zoomend', check)
-    return () => map.off('zoomend', check)
-  }, [map])
-
-  if (!visible || !midpoint) return null
+  if (!midpoint) return null
 
   const icon = L.divIcon({
     className: 'route-info-pill',

client/src/components/Map/MapViewGL.test.tsx

@@ -0,0 +1,164 @@
+import React from 'react'
+import { describe, it, expect, vi, afterEach, beforeEach } from 'vitest'
+import { render } from '../../../tests/helpers/render'
+import { act } from '@testing-library/react'
+import { resetAllStores } from '../../../tests/helpers/store'
+import { buildPlace } from '../../../tests/helpers/factories'
+import { useSettingsStore } from '../../store/settingsStore'
+
+// Stable fake map so fitBounds call counts survive re-renders.
+const glMap = vi.hoisted(() => ({
+  on: vi.fn(),
+  off: vi.fn(),
+  once: vi.fn(),
+  loaded: vi.fn().mockReturnValue(true),
+  fitBounds: vi.fn(),
+  flyTo: vi.fn(),
+  jumpTo: vi.fn(),
+  getZoom: vi.fn().mockReturnValue(10),
+  addControl: vi.fn(),
+  removeControl: vi.fn(),
+  remove: vi.fn(),
+  addSource: vi.fn(),
+  getSource: vi.fn().mockReturnValue(null),
+  addLayer: vi.fn(),
+  setLayoutProperty: vi.fn(),
+  getStyle: vi.fn().mockReturnValue({ layers: [] }),
+  isStyleLoaded: vi.fn().mockReturnValue(true),
+  getCanvasContainer: vi.fn(() => document.createElement('div')),
+}))
+
+vi.mock('mapbox-gl', () => ({
+  default: {
+    accessToken: '',
+    Map: vi.fn(() => glMap),
+    Marker: vi.fn(() => ({
+      setLngLat: vi.fn().mockReturnThis(),
+      addTo: vi.fn().mockReturnThis(),
+      remove: vi.fn(),
+      getElement: vi.fn(() => document.createElement('div')),
+    })),
+    LngLatBounds: vi.fn(() => ({ extend: vi.fn().mockReturnThis() })),
+    NavigationControl: vi.fn(),
+  },
+}))
+vi.mock('mapbox-gl/dist/mapbox-gl.css', () => ({}))
+
+vi.mock('./mapboxSetup', () => ({
+  isStandardFamily: vi.fn(() => false),
+  supportsCustom3d: vi.fn(() => false),
+  wantsTerrain: vi.fn(() => false),
+  addCustom3dBuildings: vi.fn(),
+  addTerrainAndSky: vi.fn(),
+}))
+
+vi.mock('./locationMarkerMapbox', () => ({
+  attachLocationMarker: vi.fn(() => ({ update: vi.fn() })),
+}))
+
+vi.mock('./reservationsMapbox', () => ({
+  ReservationMapboxOverlay: vi.fn().mockImplementation(() => ({ update: vi.fn() })),
+}))
+
+vi.mock('../../hooks/useGeolocation', () => ({
+  useGeolocation: vi.fn(() => ({
+    position: null,
+    mode: 'off',
+    error: null,
+    cycleMode: vi.fn(),
+    setMode: vi.fn(),
+  })),
+}))
+
+vi.mock('../../services/photoService', () => ({
+  getCached: vi.fn(() => null),
+  isLoading: vi.fn(() => false),
+  fetchPhoto: vi.fn(),
+  onThumbReady: vi.fn(() => () => {}),
+  getAllThumbs: vi.fn(() => ({})),
+}))
+
+import { MapViewGL } from './MapViewGL'
+
+function buildMapPlace(overrides: Record<string, any> = {}) {
+  return {
+    ...buildPlace(),
+    category_name: null,
+    category_color: null,
+    category_icon: null,
+    ...overrides,
+  } as any
+}
+
+beforeEach(() => {
+  useSettingsStore.setState({
+    settings: {
+      ...useSettingsStore.getState().settings,
+      map_provider: 'mapbox-gl',
+      mapbox_access_token: 'pk.test_token',
+      mapbox_style: 'mapbox://styles/mapbox/streets-v12',
+      mapbox_3d_enabled: false,
+    },
+  } as any)
+})
+
+afterEach(() => {
+  vi.clearAllMocks()
+  resetAllStores()
+})
+
+describe('MapViewGL', () => {
+  it('FE-COMP-MAPVIEWGL-001: opening place inspector does not refit bounds (issue #921)', async () => {
+    const places = [
+      buildMapPlace({ id: 1, lat: 48.8584, lng: 2.2945 }),
+      buildMapPlace({ id: 2, lat: 48.86, lng: 2.337 }),
+    ]
+
+    const { rerender } = render(
+      <MapViewGL places={places} fitKey={1} selectedPlaceId={null} hasInspector={false} />,
+    )
+    await act(async () => {})
+    const after_initial = glMap.fitBounds.mock.calls.length
+
+    // Selecting a place flips hasInspector → paddingOpts memo changes.
+    // fitBounds must NOT fire again (this was the bug).
+    rerender(
+      <MapViewGL places={places} fitKey={1} selectedPlaceId={1} hasInspector={true} />,
+    )
+    await act(async () => {})
+    expect(glMap.fitBounds).toHaveBeenCalledTimes(after_initial)
+  })
+
+  it('FE-COMP-MAPVIEWGL-002: closing inspector does not refit bounds (issue #921)', async () => {
+    const places = [
+      buildMapPlace({ id: 1, lat: 48.8584, lng: 2.2945 }),
+    ]
+
+    const { rerender } = render(
+      <MapViewGL places={places} fitKey={1} selectedPlaceId={1} hasInspector={true} />,
+    )
+    await act(async () => {})
+    const after_initial = glMap.fitBounds.mock.calls.length
+
+    // Closing inspector (X button) clears selectedPlaceId → hasInspector=false → new paddingOpts.
+    rerender(
+      <MapViewGL places={places} fitKey={1} selectedPlaceId={null} hasInspector={false} />,
+    )
+    await act(async () => {})
+    expect(glMap.fitBounds).toHaveBeenCalledTimes(after_initial)
+  })
+
+  it('FE-COMP-MAPVIEWGL-003: bumping fitKey triggers a new fitBounds call', async () => {
+    const places = [
+      buildMapPlace({ id: 1, lat: 48.8584, lng: 2.2945 }),
+    ]
+
+    const { rerender } = render(<MapViewGL places={places} fitKey={1} />)
+    await act(async () => {})
+    const after_first = glMap.fitBounds.mock.calls.length
+
+    rerender(<MapViewGL places={places} fitKey={2} />)
+    await act(async () => {})
+    expect(glMap.fitBounds.mock.calls.length).toBeGreaterThan(after_first)
+  })
+})

client/src/components/Map/MapViewGL.tsx

@@ -507,13 +507,10 @@ export function MapViewGL({
     return { top, right: rightWidth + 40, bottom, left: leftWidth + 40 }
   }, [leftWidth, rightWidth, hasInspector, hasDayDetail])
 
-  // Also fit when the places collection changes so the initial render
-  // zooms to the trip instead of the default center.
-  const placeBoundsKey = useMemo(
-    () => places.filter(p => p.lat && p.lng).map(p => `${p.id}:${p.lat}:${p.lng}`).join('|'),
-    [places]
-  )
+  const prevFitKey = useRef(-1)
   useEffect(() => {
+    if (fitKey === prevFitKey.current) return
+    prevFitKey.current = fitKey
     const map = mapRef.current
     if (!map) return
     const target = dayPlaces.length > 0 ? dayPlaces : places
@@ -533,7 +530,7 @@ export function MapViewGL({
     }
     if (map.loaded()) run()
     else map.once('load', run)
-  }, [fitKey, placeBoundsKey, paddingOpts, mapbox3d]) // eslint-disable-line react-hooks/exhaustive-deps
+  }, [fitKey]) // eslint-disable-line react-hooks/exhaustive-deps
 
   // flyTo selected place
   useEffect(() => {

client/src/components/Planner/DayPlanSidebar.tsx

@@ -2,7 +2,7 @@
 interface DragDataPayload { placeId?: string; assignmentId?: string; noteId?: string; reservationId?: string; fromDayId?: string; phase?: 'single' | 'start' | 'middle' | 'end' }
 declare global { interface Window { __dragData: DragDataPayload | null } }
 
-import React, { useState, useEffect, useRef, useMemo } from 'react'
+import React, { useState, useEffect, useLayoutEffect, useRef, useMemo } from 'react'
 import ReactDOM from 'react-dom'
 import { ChevronDown, ChevronRight, ChevronUp, ChevronsDownUp, ChevronsUpDown, Navigation, RotateCcw, ExternalLink, Clock, Pencil, GripVertical, Ticket, Plus, FileText, Check, Trash2, Info, MapPin, Star, Heart, Camera, Lightbulb, Flag, Bookmark, Train, Bus, Plane, Car, Ship, Coffee, ShoppingBag, AlertTriangle, FileDown, Lock, Hotel, Utensils, Users, Undo2, X, Route as RouteIcon } from 'lucide-react'
 
@@ -191,6 +191,8 @@ interface DayPlanSidebarProps {
   onEditTransport?: (reservation: Reservation) => void
   onEditReservation?: (reservation: Reservation) => void
   onAddBookingToAssignment?: (dayId: number, assignmentId: number) => void
+  initialScrollTop?: number
+  onScrollTopChange?: (top: number) => void
 }
 
 const DayPlanSidebar = React.memo(function DayPlanSidebar({
@@ -219,6 +221,8 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
   onEditTransport,
   onEditReservation,
   onAddBookingToAssignment,
+  initialScrollTop,
+  onScrollTopChange,
 }: DayPlanSidebarProps) {
   const toast = useToast()
   const { t, language, locale } = useTranslation()
@@ -271,6 +275,12 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
   } | null>(null)
   const inputRef = useRef(null)
   const dragDataRef = useRef(null)
+  const scrollContainerRef = useRef<HTMLDivElement | null>(null)
+  useLayoutEffect(() => {
+    if (scrollContainerRef.current && initialScrollTop) {
+      scrollContainerRef.current.scrollTop = initialScrollTop
+    }
+  }, [])
   const initedTransportIds = useRef(new Set<number>()) // Speichert Drag-Daten als Backup (dataTransfer geht bei Re-Render verloren)
   // Remember which assignment we last auto-scrolled into view so we don't
   // keep yanking the user back whenever they scroll away while the same
@@ -1118,7 +1128,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
       </div>
 
       {/* Tagesliste */}
-      <div className={`scroll-container${draggingId ? '' : ' trek-stagger'}`} style={{ flex: 1, overflowY: 'auto', minHeight: 0 }}>
+      <div className={`scroll-container${draggingId ? '' : ' trek-stagger'}`} style={{ flex: 1, overflowY: 'auto', minHeight: 0 }} ref={scrollContainerRef} onScroll={(e) => onScrollTopChange?.((e.currentTarget as HTMLElement).scrollTop)}>
         {days.map((day, index) => {
           const isSelected = selectedDayId === day.id
           const isExpanded = expandedDays.has(day.id)

client/src/components/Planner/PlacesSidebar.tsx

@@ -1,6 +1,6 @@
 import React from 'react'
 import ReactDOM from 'react-dom'
-import { useState, useMemo, useEffect, useRef, useCallback } from 'react'
+import { useState, useMemo, useEffect, useLayoutEffect, useRef, useCallback } from 'react'
 import { Search, Plus, X, CalendarDays, Pencil, Trash2, ExternalLink, Navigation, Upload, ChevronDown, Check, MapPin, Eye, Route } from 'lucide-react'
 import PlaceAvatar from '../shared/PlaceAvatar'
 import { getCategoryIcon } from '../shared/categoryIcons'
@@ -34,6 +34,8 @@ interface PlacesSidebarProps {
   onCategoryFilterChange?: (categoryIds: Set<string>) => void
   onPlacesFilterChange?: (filter: string) => void
   pushUndo?: (label: string, undoFn: () => Promise<void> | void) => void
+  initialScrollTop?: number
+  onScrollTopChange?: (top: number) => void
 }
 
 interface MemoPlaceRowProps {
@@ -145,6 +147,7 @@ const MemoPlaceRow = React.memo(function MemoPlaceRow({
 const PlacesSidebar = React.memo(function PlacesSidebar({
   tripId, places, categories, assignments, selectedDayId, selectedPlaceId,
   onPlaceClick, onAddPlace, onAssignToDay, onEditPlace, onDeletePlace, onBulkDeletePlaces, onBulkDeleteConfirm, days, isMobile, onCategoryFilterChange, onPlacesFilterChange, pushUndo,
+  initialScrollTop, onScrollTopChange,
 }: PlacesSidebarProps) {
   const { t } = useTranslation()
   const toast = useToast()
@@ -159,6 +162,12 @@ const PlacesSidebar = React.memo(function PlacesSidebar({
   const [sidebarDropFile, setSidebarDropFile] = useState<File | null>(null)
   const [sidebarDragOver, setSidebarDragOver] = useState(false)
   const sidebarDragCounter = useRef(0)
+  const scrollContainerRef = useRef<HTMLDivElement | null>(null)
+  useLayoutEffect(() => {
+    if (scrollContainerRef.current && initialScrollTop) {
+      scrollContainerRef.current.scrollTop = initialScrollTop
+    }
+  }, [])
 
   const handleSidebarDragEnter = (e: React.DragEvent) => {
     if (!canEditPlaces) return
@@ -636,7 +645,7 @@ const PlacesSidebar = React.memo(function PlacesSidebar({
       )}
 
       {/* Liste */}
-      <div className="trek-stagger" style={{ flex: 1, overflowY: 'auto', minHeight: 0 }}>
+      <div className="trek-stagger" style={{ flex: 1, overflowY: 'auto', minHeight: 0 }} ref={scrollContainerRef} onScroll={(e) => onScrollTopChange?.((e.currentTarget as HTMLElement).scrollTop)}>
         {filtered.length === 0 ? (
           <div style={{ display: 'flex', flexDirection: 'column', alignItems: 'center', padding: '40px 16px', gap: 8 }}>
             <span style={{ fontSize: 13, color: 'var(--text-faint)' }}>

client/src/pages/TripPlannerPage.test.tsx

@@ -1474,6 +1474,56 @@ describe('TripPlannerPage', () => {
     });
   });
 
+  describe('FE-PAGE-PLANNER-051: Mobile Plan sidebar stays mounted after onPlaceClick (issue #932)', () => {
+    it('does not unmount the mobile Plan portal when a place is tapped, preserving scroll position', async () => {
+      vi.useFakeTimers();
+      Object.defineProperty(window, 'innerWidth', { writable: true, configurable: true, value: 375 });
+
+      const place = buildPlace({ id: 1, trip_id: 42, lat: 48.8566, lng: 2.3522 });
+      const assignment = buildAssignment({ id: 10, day_id: 99, place, order_index: 0 });
+      seedTripStore({ id: 42 });
+      seedStore(useTripStore, {
+        places: [place],
+        assignments: { '99': [assignment] },
+      } as any);
+
+      renderPlannerPage(42);
+      act(() => { vi.runAllTimers(); });
+      vi.useRealTimers();
+
+      await waitFor(() => {
+        expect(screen.getByTestId('day-plan-sidebar')).toBeInTheDocument();
+      });
+
+      // Open the mobile Plan portal via the bottom-nav Plan button (selector mirrors FE-PAGE-PLANNER-049).
+      const mobilePlanBtn = Array.from(document.body.querySelectorAll('button')).find(
+        b => b.textContent === 'Plan' && !b.getAttribute('title'),
+      );
+      expect(mobilePlanBtn).toBeTruthy();
+      await act(async () => { fireEvent.click(mobilePlanBtn!); });
+
+      await waitFor(() => {
+        expect(screen.getAllByTestId('day-plan-sidebar').length).toBe(2);
+      });
+
+      // The mock factory overwrites capturedDayPlanSidebarProps on each mount,
+      // so current holds the mobile portal instance's props.
+      const mobileOnPlaceClick = capturedDayPlanSidebarProps.current.onPlaceClick;
+      expect(typeof mobileOnPlaceClick).toBe('function');
+
+      await act(async () => {
+        mobileOnPlaceClick(place.id, assignment.id);
+      });
+
+      // Invariant: portal must NOT unmount — both instances persist.
+      // Pre-fix: collapses to 1 (setMobileSidebarOpen(null) destroyed scroll container).
+      // Post-fix: stays at 2, browser preserves scrollTop on the living DOM node.
+      expect(screen.getAllByTestId('day-plan-sidebar').length).toBe(2);
+
+      Object.defineProperty(window, 'innerWidth', { writable: true, configurable: true, value: 1024 });
+    });
+  });
+
   describe('FE-PAGE-PLANNER-037: onExpandedDaysChange covers mapPlaces hidden logic', () => {
     it('calls onExpandedDaysChange to trigger mapPlaces hidden set computation', async () => {
       vi.useFakeTimers();

client/src/pages/TripPlannerPage.tsx

@@ -272,6 +272,8 @@ export default function TripPlannerPage(): React.ReactElement | null {
   const [fitKey, setFitKey] = useState<number>(0)
   const initialFitTripId = useRef<number | null>(null)
   const [mobileSidebarOpen, setMobileSidebarOpen] = useState<'left' | 'right' | null>(null)
+  const mobilePlanScrollTopRef = useRef<number>(0)
+  const mobilePlacesScrollTopRef = useRef<number>(0)
   const [deletePlaceId, setDeletePlaceId] = useState<number | null>(null)
   const [deletePlaceIds, setDeletePlaceIds] = useState<number[] | null>(null)
 
@@ -1114,8 +1116,8 @@ export default function TripPlannerPage(): React.ReactElement | null {
                   </div>
                   <div style={{ flex: 1, overflow: 'auto' }}>
                     {mobileSidebarOpen === 'left'
-                      ? <DayPlanSidebar tripId={tripId} trip={trip} days={days} places={places} categories={categories} assignments={assignments} selectedDayId={selectedDayId} selectedPlaceId={selectedPlaceId} selectedAssignmentId={selectedAssignmentId} onSelectDay={(id) => { handleSelectDay(id); setMobileSidebarOpen(null) }} onPlaceClick={(placeId, assignmentId) => { handlePlaceClick(placeId, assignmentId); setMobileSidebarOpen(null) }} onReorder={handleReorder} onUpdateDayTitle={handleUpdateDayTitle} onAssignToDay={handleAssignToDay} onRouteCalculated={(r) => { if (r) { setRoute(r.coordinates); setRouteInfo({ distance: r.distanceText, duration: r.durationText }) } }} reservations={reservations} visibleConnectionIds={visibleConnections} onToggleConnection={toggleConnection} onAddReservation={(dayId) => { setEditingReservation(null); tripActions.setSelectedDay(dayId); setShowReservationModal(true); setMobileSidebarOpen(null) }} onAddPlace={() => { setEditingPlace(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onDayDetail={(day) => { setShowDayDetail(day); setSelectedPlaceId(null); selectAssignment(null); setMobileSidebarOpen(null) }} accommodations={tripAccommodations} onNavigateToFiles={() => { setMobileSidebarOpen(null); handleTabChange('dateien') }} onExpandedDaysChange={setExpandedDayIds} pushUndo={pushUndo} canUndo={canUndo} lastActionLabel={lastActionLabel} onUndo={handleUndo} onEditTransport={can('day_edit', trip) ? (reservation) => { setEditingTransport(reservation); setTransportModalDayId(reservation.day_id ?? null); setShowTransportModal(true); setMobileSidebarOpen(null) } : undefined} onEditReservation={can('reservation_edit', trip) ? (r) => { setEditingReservation(r); setShowReservationModal(true); setMobileSidebarOpen(null) } : undefined} />
-                      : <PlacesSidebar tripId={tripId} places={places} categories={categories} assignments={assignments} selectedDayId={selectedDayId} selectedPlaceId={selectedPlaceId} onPlaceClick={(placeId) => { handlePlaceClick(placeId); setMobileSidebarOpen(null) }} onAddPlace={() => { setEditingPlace(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onAssignToDay={handleAssignToDay} onEditPlace={(place) => { setEditingPlace(place); setEditingAssignmentId(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onDeletePlace={(placeId) => handleDeletePlace(placeId)} onBulkDeletePlaces={(ids) => setDeletePlaceIds(ids)} onBulkDeleteConfirm={(ids) => confirmDeletePlaces(ids)} days={days} isMobile onCategoryFilterChange={setMapCategoryFilter} onPlacesFilterChange={setMapPlacesFilter} pushUndo={pushUndo} />
+                      ? <DayPlanSidebar tripId={tripId} trip={trip} days={days} places={places} categories={categories} assignments={assignments} selectedDayId={selectedDayId} selectedPlaceId={selectedPlaceId} selectedAssignmentId={selectedAssignmentId} onSelectDay={(id) => { handleSelectDay(id); setMobileSidebarOpen(null) }} onPlaceClick={(placeId, assignmentId) => { handlePlaceClick(placeId, assignmentId) }} onReorder={handleReorder} onUpdateDayTitle={handleUpdateDayTitle} onAssignToDay={handleAssignToDay} onRouteCalculated={(r) => { if (r) { setRoute(r.coordinates); setRouteInfo({ distance: r.distanceText, duration: r.durationText }) } }} reservations={reservations} visibleConnectionIds={visibleConnections} onToggleConnection={toggleConnection} onAddReservation={(dayId) => { setEditingReservation(null); tripActions.setSelectedDay(dayId); setShowReservationModal(true); setMobileSidebarOpen(null) }} onAddPlace={() => { setEditingPlace(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onDayDetail={(day) => { setShowDayDetail(day); setSelectedPlaceId(null); selectAssignment(null); setMobileSidebarOpen(null) }} accommodations={tripAccommodations} onNavigateToFiles={() => { setMobileSidebarOpen(null); handleTabChange('dateien') }} onExpandedDaysChange={setExpandedDayIds} pushUndo={pushUndo} canUndo={canUndo} lastActionLabel={lastActionLabel} onUndo={handleUndo} onEditTransport={can('day_edit', trip) ? (reservation) => { setEditingTransport(reservation); setTransportModalDayId(reservation.day_id ?? null); setShowTransportModal(true); setMobileSidebarOpen(null) } : undefined} onEditReservation={can('reservation_edit', trip) ? (r) => { setEditingReservation(r); setShowReservationModal(true); setMobileSidebarOpen(null) } : undefined} initialScrollTop={mobilePlanScrollTopRef.current} onScrollTopChange={(top) => { mobilePlanScrollTopRef.current = top }} />
+                      : <PlacesSidebar tripId={tripId} places={places} categories={categories} assignments={assignments} selectedDayId={selectedDayId} selectedPlaceId={selectedPlaceId} onPlaceClick={(placeId) => { handlePlaceClick(placeId); setMobileSidebarOpen(null) }} onAddPlace={() => { setEditingPlace(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onAssignToDay={handleAssignToDay} onEditPlace={(place) => { setEditingPlace(place); setEditingAssignmentId(null); setShowPlaceForm(true); setMobileSidebarOpen(null) }} onDeletePlace={(placeId) => handleDeletePlace(placeId)} onBulkDeletePlaces={(ids) => setDeletePlaceIds(ids)} onBulkDeleteConfirm={(ids) => confirmDeletePlaces(ids)} days={days} isMobile onCategoryFilterChange={setMapCategoryFilter} onPlacesFilterChange={setMapPlacesFilter} pushUndo={pushUndo} initialScrollTop={mobilePlacesScrollTopRef.current} onScrollTopChange={(top) => { mobilePlacesScrollTopRef.current = top }} />
                     }
                   </div>
                 </div>

server/src/routes/days.ts

@@ -117,10 +117,13 @@ accommodationsRouter.delete('/:id', authenticate, requireTripAccess, (req: Reque
 
   if (!dayService.getAccommodation(id, tripId)) return res.status(404).json({ error: 'Accommodation not found' });
 
-  const { linkedReservationId } = dayService.deleteAccommodation(id);
+  const { linkedReservationId, deletedBudgetItemId } = dayService.deleteAccommodation(id);
   if (linkedReservationId) {
     broadcast(tripId, 'reservation:deleted', { reservationId: linkedReservationId }, req.headers['x-socket-id'] as string);
   }
+  if (deletedBudgetItemId) {
+    broadcast(tripId, 'budget:deleted', { itemId: deletedBudgetItemId }, req.headers['x-socket-id'] as string);
+  }
 
   res.json({ success: true });
   broadcast(tripId, 'accommodation:deleted', { accommodationId: Number(id) }, req.headers['x-socket-id'] as string);

server/src/routes/reservations.ts

@@ -129,7 +129,7 @@ router.put('/:id', authenticate, (req: Request, res: Response) => {
     const linked = db.prepare('SELECT id FROM budget_items WHERE trip_id = ? AND reservation_id = ?').get(tripId, id) as { id: number } | undefined;
     if (linked) {
       deleteBudgetItem(linked.id, tripId);
-      broadcast(tripId, 'budget:deleted', { id: linked.id }, req.headers['x-socket-id'] as string);
+      broadcast(tripId, 'budget:deleted', { itemId: linked.id }, req.headers['x-socket-id'] as string);
     }
   }
 
@@ -179,12 +179,15 @@ router.delete('/:id', authenticate, (req: Request, res: Response) => {
   if (!checkPermission('reservation_edit', authReq.user.role, trip.user_id, authReq.user.id, trip.user_id !== authReq.user.id))
     return res.status(403).json({ error: 'No permission' });
 
-  const { deleted: reservation, accommodationDeleted } = deleteReservation(id, tripId);
+  const { deleted: reservation, accommodationDeleted, deletedBudgetItemId } = deleteReservation(id, tripId);
   if (!reservation) return res.status(404).json({ error: 'Reservation not found' });
 
   if (accommodationDeleted) {
     broadcast(tripId, 'accommodation:deleted', { accommodationId: reservation.accommodation_id }, req.headers['x-socket-id'] as string);
   }
+  if (deletedBudgetItemId) {
+    broadcast(tripId, 'budget:deleted', { itemId: deletedBudgetItemId }, req.headers['x-socket-id'] as string);
+  }
 
   res.json({ success: true });
   broadcast(tripId, 'reservation:deleted', { reservationId: Number(id) }, req.headers['x-socket-id'] as string);

server/src/services/dayService.ts

@@ -292,14 +292,19 @@ export function updateAccommodation(id: string | number, existing: DayAccommodat
   return getAccommodationWithPlace(Number(id));
 }
 
-/** Delete accommodation and its linked reservation. Returns the linked reservation id if one existed. */
-export function deleteAccommodation(id: string | number): { linkedReservationId: number | null } {
-  // Delete linked reservation
+/** Delete accommodation and its linked reservation (and any linked budget item). */
+export function deleteAccommodation(id: string | number): { linkedReservationId: number | null; deletedBudgetItemId: number | null } {
   const linkedRes = db.prepare('SELECT id FROM reservations WHERE accommodation_id = ?').get(Number(id)) as { id: number } | undefined;
+  let deletedBudgetItemId: number | null = null;
   if (linkedRes) {
+    const linkedBudget = db.prepare('SELECT id FROM budget_items WHERE reservation_id = ?').get(linkedRes.id) as { id: number } | undefined;
+    if (linkedBudget) {
+      db.prepare('DELETE FROM budget_items WHERE id = ?').run(linkedBudget.id);
+      deletedBudgetItemId = linkedBudget.id;
+    }
     db.prepare('DELETE FROM reservations WHERE id = ?').run(linkedRes.id);
   }
 
   db.prepare('DELETE FROM day_accommodations WHERE id = ?').run(id);
-  return { linkedReservationId: linkedRes ? linkedRes.id : null };
+  return { linkedReservationId: linkedRes ? linkedRes.id : null, deletedBudgetItemId };
 }

server/src/services/reservationService.ts

@@ -418,9 +418,9 @@ export function updateReservation(id: string | number, tripId: string | number,
   return { reservation, accommodationChanged };
 }
 
-export function deleteReservation(id: string | number, tripId: string | number): { deleted: { id: number; title: string; type: string; accommodation_id: number | null } | undefined; accommodationDeleted: boolean } {
+export function deleteReservation(id: string | number, tripId: string | number): { deleted: { id: number; title: string; type: string; accommodation_id: number | null } | undefined; accommodationDeleted: boolean; deletedBudgetItemId: number | null } {
   const reservation = db.prepare('SELECT id, title, type, accommodation_id FROM reservations WHERE id = ? AND trip_id = ?').get(id, tripId) as { id: number; title: string; type: string; accommodation_id: number | null } | undefined;
-  if (!reservation) return { deleted: undefined, accommodationDeleted: false };
+  if (!reservation) return { deleted: undefined, accommodationDeleted: false, deletedBudgetItemId: null };
 
   let accommodationDeleted = false;
   if (reservation.accommodation_id) {
@@ -428,6 +428,11 @@ export function deleteReservation(id: string | number, tripId: string | number):
     accommodationDeleted = true;
   }
 
+  const linkedBudget = db.prepare('SELECT id FROM budget_items WHERE trip_id = ? AND reservation_id = ?').get(tripId, id) as { id: number } | undefined;
+  if (linkedBudget) {
+    db.prepare('DELETE FROM budget_items WHERE id = ?').run(linkedBudget.id);
+  }
+
   db.prepare('DELETE FROM reservations WHERE id = ?').run(id);
-  return { deleted: reservation, accommodationDeleted };
+  return { deleted: reservation, accommodationDeleted, deletedBudgetItemId: linkedBudget ? linkedBudget.id : null };
 }

server/tests/integration/budget.test.ts

@@ -189,6 +189,25 @@ describe('Delete budget item', () => {
       .set('Cookie', authCookie(user.id));
     expect(list.body.items).toHaveLength(0);
   });
+
+  it('BUDGET-004b — DELETE budget item does NOT delete its linked reservation', async () => {
+    const { user } = createUser(testDb);
+    const trip = createTrip(testDb, user.id);
+    const reservation = createReservation(testDb, trip.id, { title: 'Hotel Booking', type: 'hotel' });
+
+    const result = testDb.prepare(
+      'INSERT INTO budget_items (trip_id, name, category, total_price, reservation_id) VALUES (?, ?, ?, ?, ?)'
+    ).run(trip.id, 'Hotel Cost', 'Accommodation', 250, reservation.id);
+    const itemId = result.lastInsertRowid as number;
+
+    const del = await request(app)
+      .delete(`/api/trips/${trip.id}/budget/${itemId}`)
+      .set('Cookie', authCookie(user.id));
+    expect(del.status).toBe(200);
+
+    const reservationAfter = testDb.prepare('SELECT id FROM reservations WHERE id = ?').get(reservation.id);
+    expect(reservationAfter).toBeDefined();
+  });
 });
 
 // ─────────────────────────────────────────────────────────────────────────────

server/tests/integration/days.test.ts

@@ -502,4 +502,46 @@ describe('Accommodations', () => {
     ).get(reservationBefore.id);
     expect(reservationAfter).toBeUndefined();
   });
+
+  it('ACCOM-006 — DELETE accommodation also removes its linked budget item (issue #933)', async () => {
+    const { user } = createUser(testDb);
+    const trip = createTrip(testDb, user.id, { title: 'Hotel Budget Trip' });
+    const day1 = createDay(testDb, trip.id, { date: '2026-11-01' });
+    const day2 = createDay(testDb, trip.id, { date: '2026-11-03' });
+    const place = createPlace(testDb, trip.id, { name: 'Grand Hotel' });
+
+    // Create a hotel reservation that creates an accommodation and a linked budget item
+    const createRes = await request(app)
+      .post(`/api/trips/${trip.id}/reservations`)
+      .set('Cookie', authCookie(user.id))
+      .send({
+        title: 'Grand Hotel Stay',
+        type: 'hotel',
+        day_id: day1.id,
+        create_accommodation: { place_id: place.id, start_day_id: day1.id, end_day_id: day2.id },
+        create_budget_entry: { total_price: 450, category: 'Accommodation' },
+      });
+    expect(createRes.status).toBe(201);
+
+    const accommodationId = testDb.prepare(
+      'SELECT id FROM day_accommodations WHERE trip_id = ?'
+    ).get(trip.id) as any;
+    expect(accommodationId).toBeDefined();
+
+    const budgetBefore = testDb.prepare(
+      'SELECT id FROM budget_items WHERE trip_id = ?'
+    ).get(trip.id);
+    expect(budgetBefore).toBeDefined();
+
+    // Delete via the accommodation endpoint (the primary bug path)
+    const delRes = await request(app)
+      .delete(`/api/trips/${trip.id}/accommodations/${accommodationId.id}`)
+      .set('Cookie', authCookie(user.id));
+    expect(delRes.status).toBe(200);
+
+    const budgetAfter = testDb.prepare(
+      'SELECT id FROM budget_items WHERE trip_id = ?'
+    ).get(trip.id);
+    expect(budgetAfter).toBeUndefined();
+  });
 });

server/tests/integration/reservations.test.ts

@@ -452,4 +452,41 @@ describe('Reservation accommodation delete', () => {
     ).get(accom.id);
     expect(accomAfter).toBeUndefined();
   });
+
+  it('RESV-009b — DELETE reservation linked to accommodation also removes its linked budget item (issue #933)', async () => {
+    const { user } = createUser(testDb);
+    const trip = createTrip(testDb, user.id);
+    const day1 = createDay(testDb, trip.id, { date: '2025-08-01' });
+    const day2 = createDay(testDb, trip.id, { date: '2025-08-03' });
+    const place = createPlace(testDb, trip.id, { name: 'Seaside Resort' });
+
+    const createRes = await request(app)
+      .post(`/api/trips/${trip.id}/reservations`)
+      .set('Cookie', authCookie(user.id))
+      .send({
+        title: 'Seaside Resort Stay',
+        type: 'hotel',
+        day_id: day1.id,
+        create_accommodation: { place_id: place.id, start_day_id: day1.id, end_day_id: day2.id },
+        create_budget_entry: { total_price: 320, category: 'Accommodation' },
+      });
+    expect(createRes.status).toBe(201);
+    const reservationId = createRes.body.reservation.id;
+
+    const budgetBefore = testDb.prepare(
+      'SELECT id FROM budget_items WHERE trip_id = ? AND reservation_id = ?'
+    ).get(trip.id, reservationId);
+    expect(budgetBefore).toBeDefined();
+
+    // Delete via the reservation endpoint
+    const delRes = await request(app)
+      .delete(`/api/trips/${trip.id}/reservations/${reservationId}`)
+      .set('Cookie', authCookie(user.id));
+    expect(delRes.status).toBe(200);
+
+    const budgetAfter = testDb.prepare(
+      'SELECT id FROM budget_items WHERE trip_id = ?'
+    ).get(trip.id);
+    expect(budgetAfter).toBeUndefined();
+  });
 });