feat(trips): add configurable day count for trips without dates

- Show day count input in trip form when no start/end date is set
- Backend accepts day_count param for create and update
- Remove forced date assignment for dateless trips (was always setting tomorrow + 7)
- Fix off-by-one: single-date fallback now creates 7 days instead of 8
- Add dayCount/dayCountHint translations for all 13 languages

client/src/components/Trips/TripFormModal.tsx

@@ -36,6 +36,7 @@ export default function TripFormModal({ isOpen, onClose, onSave, trip, onCoverUp
     start_date: '',
     end_date: '',
     reminder_days: 0 as number,
+    day_count: 7,
   })
   const [customReminder, setCustomReminder] = useState(false)
   const [error, setError] = useState('')
@@ -56,11 +57,12 @@ export default function TripFormModal({ isOpen, onClose, onSave, trip, onCoverUp
         start_date: trip.start_date || '',
         end_date: trip.end_date || '',
         reminder_days: rd,
+        day_count: trip.day_count || 7,
       })
       setCustomReminder(![0, 1, 3, 9].includes(rd))
       setCoverPreview(trip.cover_image || null)
     } else {
-      setFormData({ title: '', description: '', start_date: '', end_date: '', reminder_days: tripRemindersEnabled ? 3 : 0 })
+      setFormData({ title: '', description: '', start_date: '', end_date: '', reminder_days: tripRemindersEnabled ? 3 : 0, day_count: 7 })
       setCustomReminder(false)
       setCoverPreview(null)
     }
@@ -98,6 +100,7 @@ export default function TripFormModal({ isOpen, onClose, onSave, trip, onCoverUp
         start_date: formData.start_date || null,
         end_date: formData.end_date || null,
         reminder_days: formData.reminder_days,
+        ...(!formData.start_date && !formData.end_date ? { day_count: formData.day_count } : {}),
       })
       // Add selected members for newly created trips
       if (selectedMembers.length > 0 && result?.trip?.id) {
@@ -297,6 +300,18 @@ export default function TripFormModal({ isOpen, onClose, onSave, trip, onCoverUp
           </div>
         </div>
 
+        {!formData.start_date && !formData.end_date && (
+          <div>
+            <label className="block text-sm font-medium text-slate-700 mb-1.5">
+              {t('dashboard.dayCount')}
+            </label>
+            <input type="number" min={1} max={365} value={formData.day_count}
+              onChange={e => update('day_count', Math.max(1, Math.min(365, Number(e.target.value) || 1)))}
+              className={inputCls} />
+            <p className="text-xs text-slate-400 mt-1.5">{t('dashboard.dayCountHint')}</p>
+          </div>
+        )}
+
         {/* Reminder — only visible to owner (or when creating) */}
         {(!isEditing || trip?.user_id === currentUser?.id || currentUser?.role === 'admin') && (
         <div className={!tripRemindersEnabled ? 'opacity-50' : ''}>

client/src/i18n/translations/ar.ts

@@ -118,6 +118,8 @@ const ar: Record<string, string | { name: string; category: string }[]> = {
   'dashboard.tripDescriptionPlaceholder': 'عمّ تتحدث هذه الرحلة؟',
   'dashboard.startDate': 'تاريخ البداية',
   'dashboard.endDate': 'تاريخ النهاية',
+  'dashboard.dayCount': 'عدد الأيام',
+  'dashboard.dayCountHint': 'عدد الأيام المراد التخطيط لها عندما لا يتم تحديد تواريخ السفر.',
   'dashboard.noDateHint': 'لا يوجد تاريخ محدد. سيتم إنشاء 7 أيام افتراضية ويمكنك تغيير ذلك لاحقًا.',
   'dashboard.coverImage': 'صورة الغلاف',
   'dashboard.addCoverImage': 'إضافة صورة غلاف',

client/src/i18n/translations/br.ts

@@ -113,6 +113,8 @@ const br: Record<string, string | { name: string; category: string }[]> = {
   'dashboard.tripDescriptionPlaceholder': 'Sobre o que é esta viagem?',
   'dashboard.startDate': 'Data de início',
   'dashboard.endDate': 'Data de término',
+  'dashboard.dayCount': 'Número de dias',
+  'dashboard.dayCountHint': 'Quantos dias planejar quando nenhuma data de viagem for definida.',
   'dashboard.noDateHint': 'Sem datas — serão criados 7 dias padrão. Você pode alterar depois.',
   'dashboard.coverImage': 'Imagem de capa',
   'dashboard.addCoverImage': 'Adicionar capa (ou arrastar e soltar)',

client/src/i18n/translations/cs.ts

@@ -114,6 +114,8 @@ const cs: Record<string, string | { name: string; category: string }[]> = {
   'dashboard.tripDescriptionPlaceholder': 'O čem je tato cesta?',
   'dashboard.startDate': 'Datum začátku',
   'dashboard.endDate': 'Datum konce',
+  'dashboard.dayCount': 'Počet dnů',
+  'dashboard.dayCountHint': 'Kolik dnů naplánovat, když nejsou nastavena data cesty.',
   'dashboard.noDateHint': 'Datum nezadáno – výchozí délka nastavena na 7 dní. Toto lze kdykoli změnit.',
   'dashboard.coverImage': 'Úvodní obrázek',
   'dashboard.addCoverImage': 'Vybrat úvodní obrázek (nebo přetáhnout sem)',

client/src/i18n/translations/de.ts

@@ -113,6 +113,8 @@ const de: Record<string, string | { name: string; category: string }[]> = {
   'dashboard.tripDescriptionPlaceholder': 'Worum geht es bei dieser Reise?',
   'dashboard.startDate': 'Startdatum',
   'dashboard.endDate': 'Enddatum',
+  'dashboard.dayCount': 'Anzahl Tage',
+  'dashboard.dayCountHint': 'Wie viele Tage geplant werden sollen, wenn kein Reisezeitraum gesetzt ist.',
   'dashboard.noDateHint': 'Kein Datum gesetzt — es werden 7 Standardtage erstellt. Du kannst das jederzeit ändern.',
   'dashboard.coverImage': 'Titelbild',
   'dashboard.addCoverImage': 'Titelbild hinzufügen (oder per Drag & Drop)',

client/src/i18n/translations/en.ts

@@ -113,6 +113,8 @@ const en: Record<string, string | { name: string; category: string }[]> = {
   'dashboard.tripDescriptionPlaceholder': 'What is this trip about?',
   'dashboard.startDate': 'Start Date',
   'dashboard.endDate': 'End Date',
+  'dashboard.dayCount': 'Number of Days',
+  'dashboard.dayCountHint': 'How many days to plan for when no travel dates are set.',
   'dashboard.noDateHint': 'No date set — 7 default days will be created. You can change this anytime.',
   'dashboard.coverImage': 'Cover Image',
   'dashboard.addCoverImage': 'Add cover image (or drag & drop)',

client/src/i18n/translations/es.ts

@@ -114,6 +114,8 @@ const es: Record<string, string> = {
   'dashboard.tripDescriptionPlaceholder': '¿De qué trata este viaje?',
   'dashboard.startDate': 'Fecha de inicio',
   'dashboard.endDate': 'Fecha de fin',
+  'dashboard.dayCount': 'Número de días',
+  'dashboard.dayCountHint': 'Cuántos días planificar cuando no se han establecido fechas de viaje.',
   'dashboard.noDateHint': 'Sin fecha definida: se crearán 7 días por defecto. Puedes cambiarlo cuando quieras.',
   'dashboard.coverImage': 'Imagen de portada',
   'dashboard.addCoverImage': 'Añadir imagen de portada',

client/src/i18n/translations/fr.ts

@@ -113,6 +113,8 @@ const fr: Record<string, string> = {
   'dashboard.tripDescriptionPlaceholder': 'De quoi parle ce voyage ?',
   'dashboard.startDate': 'Date de début',
   'dashboard.endDate': 'Date de fin',
+  'dashboard.dayCount': 'Nombre de jours',
+  'dashboard.dayCountHint': 'Nombre de jours à planifier lorsqu'aucune date de voyage n'est définie.',
   'dashboard.noDateHint': 'Aucune date définie — 7 jours par défaut seront créés. Vous pouvez modifier cela à tout moment.',
   'dashboard.coverImage': 'Image de couverture',
   'dashboard.addCoverImage': 'Ajouter une image de couverture',

client/src/i18n/translations/hu.ts

@@ -113,6 +113,8 @@ const hu: Record<string, string | { name: string; category: string }[]> = {
   'dashboard.tripDescriptionPlaceholder': 'Miről szól ez az utazás?',
   'dashboard.startDate': 'Kezdő dátum',
   'dashboard.endDate': 'Záró dátum',
+  'dashboard.dayCount': 'Napok száma',
+  'dashboard.dayCountHint': 'Hány napot tervezzen, ha nincsenek utazási dátumok megadva.',
   'dashboard.noDateHint': 'Nincs dátum megadva — 7 alapértelmezett nap jön létre. Ezt bármikor módosíthatod.',
   'dashboard.coverImage': 'Borítókép',
   'dashboard.addCoverImage': 'Borítókép hozzáadása',

client/src/i18n/translations/it.ts

@@ -113,6 +113,8 @@ const it: Record<string, string | { name: string; category: string }[]> = {
   'dashboard.tripDescriptionPlaceholder': 'Di cosa tratta questo viaggio?',
   'dashboard.startDate': 'Data di inizio',
   'dashboard.endDate': 'Data di fine',
+  'dashboard.dayCount': 'Numero di giorni',
+  'dashboard.dayCountHint': 'Quanti giorni pianificare quando non sono impostate date di viaggio.',
   'dashboard.noDateHint': 'Nessuna data impostata — verranno creati 7 giorni predefiniti. Puoi cambiarlo in qualsiasi momento.',
   'dashboard.coverImage': 'Immagine di copertina',
   'dashboard.addCoverImage': 'Aggiungi immagine di copertina (o trascinala qui)',

client/src/i18n/translations/nl.ts

@@ -113,6 +113,8 @@ const nl: Record<string, string> = {
   'dashboard.tripDescriptionPlaceholder': 'Waar gaat deze reis over?',
   'dashboard.startDate': 'Startdatum',
   'dashboard.endDate': 'Einddatum',
+  'dashboard.dayCount': 'Aantal dagen',
+  'dashboard.dayCountHint': 'Hoeveel dagen te plannen wanneer er geen reisdata zijn ingesteld.',
   'dashboard.noDateHint': 'Geen datum ingesteld — er worden standaard 7 dagen aangemaakt. Je kunt dit altijd wijzigen.',
   'dashboard.coverImage': 'Omslagafbeelding',
   'dashboard.addCoverImage': 'Omslagafbeelding toevoegen',

client/src/i18n/translations/pl.ts

@@ -99,6 +99,8 @@ const pl: Record<string, string | { name: string; category: string }[]> = {
   'dashboard.tripDescriptionPlaceholder': 'Opisz swoją podróż',
   'dashboard.startDate': 'Data rozpoczęcia',
   'dashboard.endDate': 'Data zakończenia',
+  'dashboard.dayCount': 'Liczba dni',
+  'dashboard.dayCountHint': 'Ile dni zaplanować, gdy nie ustawiono dat podróży.',
   'dashboard.noDateHint': 'Nie ustawiono daty — zostanie utworzonych 7 domyślnych dni. Możesz to zmienić w dowolnym momencie.',
   'dashboard.coverImage': 'Okładka',
   'dashboard.addCoverImage': 'Dodaj okładkę (lub przeciągnij i upuść)',

client/src/i18n/translations/ru.ts

@@ -113,6 +113,8 @@ const ru: Record<string, string> = {
   'dashboard.tripDescriptionPlaceholder': 'О чём эта поездка?',
   'dashboard.startDate': 'Дата начала',
   'dashboard.endDate': 'Дата окончания',
+  'dashboard.dayCount': 'Количество дней',
+  'dashboard.dayCountHint': 'Сколько дней планировать, если даты поездки не указаны.',
   'dashboard.noDateHint': 'Дата не указана — будет создано 7 дней по умолчанию. Вы можете изменить это в любое время.',
   'dashboard.coverImage': 'Обложка',
   'dashboard.addCoverImage': 'Добавить обложку',

client/src/i18n/translations/zh.ts

@@ -113,6 +113,8 @@ const zh: Record<string, string> = {
   'dashboard.tripDescriptionPlaceholder': '这次旅行是关于什么的？',
   'dashboard.startDate': '开始日期',
   'dashboard.endDate': '结束日期',
+  'dashboard.dayCount': '天数',
+  'dashboard.dayCountHint': '未设置旅行日期时要规划的天数。',
   'dashboard.noDateHint': '未设置日期——将默认创建 7 天。你可以随时修改。',
   'dashboard.coverImage': '封面图片',
   'dashboard.addCoverImage': '添加封面图片',

server/src/routes/trips.ts

@@ -74,7 +74,7 @@ router.post('/', authenticate, (req: Request, res: Response) => {
   if (!checkPermission('trip_create', authReq.user.role, null, authReq.user.id, false))
     return res.status(403).json({ error: 'No permission to create trips' });
 
-  const { title, description, currency, reminder_days } = req.body;
+  const { title, description, currency, reminder_days, day_count } = req.body;
   if (!title) return res.status(400).json({ error: 'Title is required' });
 
   const toDateStr = (d: Date) => d.toISOString().slice(0, 10);
@@ -84,19 +84,18 @@ router.post('/', authenticate, (req: Request, res: Response) => {
   let end_date: string | null = req.body.end_date || null;
 
   if (!start_date && !end_date) {
-    const tomorrow = addDays(new Date(), 1);
-    start_date = toDateStr(tomorrow);
-    end_date = toDateStr(addDays(tomorrow, 7));
+    // No dates: create dateless placeholder days (day_count or default 7)
   } else if (start_date && !end_date) {
-    end_date = toDateStr(addDays(new Date(start_date), 7));
+    end_date = toDateStr(addDays(new Date(start_date), 6));
   } else if (!start_date && end_date) {
-    start_date = toDateStr(addDays(new Date(end_date), -7));
+    start_date = toDateStr(addDays(new Date(end_date), -6));
   }
 
-  if (new Date(end_date!) < new Date(start_date!))
+  if (start_date && end_date && new Date(end_date) < new Date(start_date))
     return res.status(400).json({ error: 'End date must be after start date' });
 
-  const { trip, tripId, reminderDays } = createTrip(authReq.user.id, { title, description, start_date, end_date, currency, reminder_days });
+  const parsedDayCount = day_count ? Math.min(Math.max(Number(day_count) || 7, 1), 365) : undefined;
+  const { trip, tripId, reminderDays } = createTrip(authReq.user.id, { title, description, start_date, end_date, currency, reminder_days, day_count: parsedDayCount });
 
   writeAudit({ userId: authReq.user.id, action: 'trip.create', ip: getClientIp(req), details: { tripId, title, reminder_days: reminderDays === 0 ? 'none' : `${reminderDays} days` } });
   if (reminderDays > 0) {
@@ -136,7 +135,7 @@ router.put('/:id', authenticate, (req: Request, res: Response) => {
       return res.status(403).json({ error: 'No permission to change cover image' });
   }
   // General edit check (title, description, dates, currency, reminder_days)
-  const editFields = ['title', 'description', 'start_date', 'end_date', 'currency', 'reminder_days'];
+  const editFields = ['title', 'description', 'start_date', 'end_date', 'currency', 'reminder_days', 'day_count'];
   if (editFields.some(f => req.body[f] !== undefined)) {
     if (!checkPermission('trip_edit', authReq.user.role, tripOwnerId, authReq.user.id, isMember))
       return res.status(403).json({ error: 'No permission to edit this trip' });

server/src/services/tripService.ts

@@ -32,7 +32,7 @@ export { isOwner };
 
 // ── Day generation ────────────────────────────────────────────────────────
 
-export function generateDays(tripId: number | bigint | string, startDate: string | null, endDate: string | null, maxDays?: number) {
+export function generateDays(tripId: number | bigint | string, startDate: string | null, endDate: string | null, maxDays?: number, dayCount?: number) {
   const existing = db.prepare('SELECT id, day_number, date FROM days WHERE trip_id = ?').all(tripId) as { id: number; day_number: number; date: string | null }[];
 
   if (!startDate || !endDate) {
@@ -41,12 +41,13 @@ export function generateDays(tripId: number | bigint | string, startDate: string
     if (withDates.length > 0) {
       db.prepare(`DELETE FROM days WHERE trip_id = ? AND date IS NOT NULL`).run(tripId);
     }
-    const needed = 7 - datelessExisting.length;
+    const targetCount = Math.min(Math.max(dayCount ?? (datelessExisting.length || 7), 1), MAX_TRIP_DAYS);
+    const needed = targetCount - datelessExisting.length;
     if (needed > 0) {
       const insert = db.prepare('INSERT INTO days (trip_id, day_number, date) VALUES (?, ?, NULL)');
       for (let i = 0; i < needed; i++) insert.run(tripId, datelessExisting.length + i + 1);
     } else if (needed < 0) {
-      const toRemove = datelessExisting.slice(7);
+      const toRemove = datelessExisting.slice(targetCount);
       const del = db.prepare('DELETE FROM days WHERE id = ?');
       for (const d of toRemove) del.run(d.id);
     }
@@ -139,6 +140,7 @@ interface CreateTripData {
   end_date?: string | null;
   currency?: string;
   reminder_days?: number;
+  day_count?: number;
 }
 
 export function createTrip(userId: number, data: CreateTripData, maxDays?: number) {
@@ -152,7 +154,7 @@ export function createTrip(userId: number, data: CreateTripData, maxDays?: numbe
   `).run(userId, data.title, data.description || null, data.start_date || null, data.end_date || null, data.currency || 'EUR', rd);
 
   const tripId = result.lastInsertRowid;
-  generateDays(tripId, data.start_date || null, data.end_date || null, maxDays);
+  generateDays(tripId, data.start_date || null, data.end_date || null, maxDays, data.day_count);
 
   const trip = db.prepare(`${TRIP_SELECT} WHERE t.id = :tripId`).get({ userId, tripId });
   return { trip, tripId: Number(tripId), reminderDays: rd };
@@ -175,6 +177,7 @@ interface UpdateTripData {
   is_archived?: boolean | number;
   cover_image?: string;
   reminder_days?: number;
+  day_count?: number;
 }
 
 export interface UpdateTripResult {
@@ -214,8 +217,9 @@ export function updateTrip(tripId: string | number, userId: number, data: Update
     WHERE id=?
   `).run(newTitle, newDesc, newStart || null, newEnd || null, newCurrency, newArchived, newCover, newReminder, tripId);
 
-  if (newStart !== trip.start_date || newEnd !== trip.end_date)
-    generateDays(tripId, newStart || null, newEnd || null);
+  const dayCount = data.day_count ? Math.min(Math.max(Number(data.day_count) || 7, 1), MAX_TRIP_DAYS) : undefined;
+  if (newStart !== trip.start_date || newEnd !== trip.end_date || dayCount)
+    generateDays(tripId, newStart || null, newEnd || null, undefined, dayCount);
 
   const changes: Record<string, unknown> = {};
   if (title && title !== trip.title) changes.title = title;