Fix double delete confirm, inline place name editing, preserve assignments on trip extend

- Replace double browser confirm() with single custom ConfirmDialog for place deletion
- Add inline name editing via double-click in PlaceInspector
- Rewrite generateDays() to preserve existing days/assignments when extending trips
- Use UTC date math to avoid timezone-related day count errors
- Add missing collab.chat.emptyDesc translation (en/de)

client/src/components/Planner/DayPlanSidebar.jsx

@@ -674,7 +674,7 @@ export default function DayPlanSidebar({
                               place.website && { label: t('inspector.website'), icon: ExternalLink, onClick: () => window.open(place.website, '_blank') },
                               (place.lat && place.lng) && { label: 'Google Maps', icon: Navigation, onClick: () => window.open(`https://www.google.com/maps/search/?api=1&query=${place.lat},${place.lng}`, '_blank') },
                               { divider: true },
-                              onDeletePlace && { label: t('common.delete'), icon: Trash2, danger: true, onClick: () => { if (confirm(t('trip.confirm.deletePlace'))) onDeletePlace(place.id) } },
+                              onDeletePlace && { label: t('common.delete'), icon: Trash2, danger: true, onClick: () => onDeletePlace(place.id) },
                             ])}
                             onMouseEnter={() => setHoveredId(assignment.id)}
                             onMouseLeave={() => setHoveredId(null)}

client/src/components/Planner/PlaceInspector.jsx

@@ -100,16 +100,39 @@ function formatFileSize(bytes) {
 export default function PlaceInspector({
   place, categories, days, selectedDayId, selectedAssignmentId, assignments, reservations = [],
   onClose, onEdit, onDelete, onAssignToDay, onRemoveAssignment,
-  files, onFileUpload, tripMembers = [], onSetParticipants,
+  files, onFileUpload, tripMembers = [], onSetParticipants, onUpdatePlace,
 }) {
   const { t, locale, language } = useTranslation()
   const timeFormat = useSettingsStore(s => s.settings.time_format) || '24h'
   const [hoursExpanded, setHoursExpanded] = useState(false)
   const [filesExpanded, setFilesExpanded] = useState(false)
   const [isUploading, setIsUploading] = useState(false)
+  const [editingName, setEditingName] = useState(false)
+  const [nameValue, setNameValue] = useState('')
+  const nameInputRef = useRef(null)
   const fileInputRef = useRef(null)
   const googleDetails = useGoogleDetails(place?.google_place_id, language)
 
+  const startNameEdit = () => {
+    if (!onUpdatePlace) return
+    setNameValue(place.name || '')
+    setEditingName(true)
+    setTimeout(() => nameInputRef.current?.focus(), 0)
+  }
+
+  const commitNameEdit = () => {
+    if (!editingName) return
+    const trimmed = nameValue.trim()
+    setEditingName(false)
+    if (!trimmed || trimmed === place.name) return
+    onUpdatePlace(place.id, { name: trimmed })
+  }
+
+  const handleNameKeyDown = (e) => {
+    if (e.key === 'Enter') { e.preventDefault(); commitNameEdit() }
+    if (e.key === 'Escape') setEditingName(false)
+  }
+
   if (!place) return null
 
   const category = categories?.find(c => c.id === place.category_id)
@@ -192,7 +215,21 @@ export default function PlaceInspector({
           </div>
           <div style={{ flex: 1, minWidth: 0 }}>
             <div style={{ display: 'flex', alignItems: 'center', gap: 6, flexWrap: 'wrap' }}>
-              <span style={{ fontWeight: 600, fontSize: 15, color: 'var(--text-primary)', lineHeight: '1.3' }}>{place.name}</span>
+              {editingName ? (
+                <input
+                  ref={nameInputRef}
+                  value={nameValue}
+                  onChange={e => setNameValue(e.target.value)}
+                  onBlur={commitNameEdit}
+                  onKeyDown={handleNameKeyDown}
+                  style={{ fontWeight: 600, fontSize: 15, color: 'var(--text-primary)', lineHeight: '1.3', background: 'var(--bg-secondary)', border: '1px solid var(--border-primary)', borderRadius: 6, padding: '1px 6px', fontFamily: 'inherit', outline: 'none', width: '100%' }}
+                />
+              ) : (
+                <span
+                  onDoubleClick={startNameEdit}
+                  style={{ fontWeight: 600, fontSize: 15, color: 'var(--text-primary)', lineHeight: '1.3', cursor: onUpdatePlace ? 'text' : 'default' }}
+                >{place.name}</span>
+              )}
               {category && (() => {
                 const CatIcon = getCategoryIcon(category.icon)
                 return (

client/src/components/Planner/PlacesSidebar.jsx

@@ -146,7 +146,7 @@ export default function PlacesSidebar({
                   place.website && { label: t('inspector.website'), icon: ExternalLink, onClick: () => window.open(place.website, '_blank') },
                   (place.lat && place.lng) && { label: 'Google Maps', icon: Navigation, onClick: () => window.open(`https://www.google.com/maps/search/?api=1&query=${place.lat},${place.lng}`, '_blank') },
                   { divider: true },
-                  onDeletePlace && { label: t('common.delete'), icon: Trash2, danger: true, onClick: () => { if (confirm(t('trip.confirm.deletePlace'))) onDeletePlace(place.id) } },
+                  onDeletePlace && { label: t('common.delete'), icon: Trash2, danger: true, onClick: () => onDeletePlace(place.id) },
                 ])}
                 style={{
                   display: 'flex', alignItems: 'center', gap: 10,

client/src/components/shared/ConfirmDialog.jsx

@@ -0,0 +1,90 @@
+import React, { useEffect, useCallback } from 'react'
+import { AlertTriangle } from 'lucide-react'
+import { useTranslation } from '../../i18n'
+
+export default function ConfirmDialog({
+  isOpen,
+  onClose,
+  onConfirm,
+  title,
+  message,
+  confirmLabel,
+  cancelLabel,
+  danger = true,
+}) {
+  const { t } = useTranslation()
+
+  const handleEsc = useCallback((e) => {
+    if (e.key === 'Escape') onClose()
+  }, [onClose])
+
+  useEffect(() => {
+    if (isOpen) {
+      document.addEventListener('keydown', handleEsc)
+    }
+    return () => document.removeEventListener('keydown', handleEsc)
+  }, [isOpen, handleEsc])
+
+  if (!isOpen) return null
+
+  return (
+    <div
+      className="fixed inset-0 z-[60] flex items-center justify-center px-4"
+      style={{ backgroundColor: 'rgba(15, 23, 42, 0.5)' }}
+      onClick={onClose}
+    >
+      <div
+        className="rounded-2xl shadow-2xl w-full max-w-sm p-6"
+        style={{
+          animation: 'modalIn 0.2s ease-out forwards',
+          background: 'var(--bg-card)',
+        }}
+        onClick={e => e.stopPropagation()}
+      >
+        <div className="flex items-start gap-4">
+          {danger && (
+            <div className="flex-shrink-0 w-10 h-10 rounded-full bg-red-100 flex items-center justify-center">
+              <AlertTriangle className="w-5 h-5 text-red-600" />
+            </div>
+          )}
+          <div className="flex-1">
+            <h3 className="text-base font-semibold" style={{ color: 'var(--text-primary)' }}>
+              {title || t('common.confirm')}
+            </h3>
+            <p className="mt-1 text-sm" style={{ color: 'var(--text-secondary)' }}>
+              {message}
+            </p>
+          </div>
+        </div>
+
+        <div className="flex justify-end gap-3 mt-6">
+          <button
+            onClick={onClose}
+            className="px-4 py-2 text-sm font-medium rounded-lg transition-colors"
+            style={{
+              color: 'var(--text-secondary)',
+              border: '1px solid var(--border-secondary)',
+            }}
+          >
+            {cancelLabel || t('common.cancel')}
+          </button>
+          <button
+            onClick={() => { onConfirm(); onClose() }}
+            className={`px-4 py-2 text-sm font-medium rounded-lg transition-colors text-white ${
+              danger ? 'bg-red-600 hover:bg-red-700' : 'bg-blue-600 hover:bg-blue-700'
+            }`}
+          >
+            {confirmLabel || t('common.delete')}
+          </button>
+        </div>
+      </div>
+
+      <style>{`
+        @keyframes modalIn {
+          from { opacity: 0; transform: scale(0.95) translateY(-10px); }
+          to { opacity: 1; transform: scale(1) translateY(0); }
+        }
+      `}</style>
+    </div>
+  )
+}