feat(sms): implement SMS messaging and metered billing

Implement a complete SMS messaging system including:
- Integration with SMS Manager.cz API for sending messages.
- Metered billing via Stripe using monthly aggregate invoice items.
- Backend services for managing SMS settings, usage logging, and monthly reporting.
- Database migrations for tenant settings, usage logs, and monthly reports.
- Frontend dashboard components for SMS configuration, usage tracking, and history.
- Support for customer phone numbers in the booking flow.

Includes new migrations, backend services, and frontend UI components.

apps/frontend/src/providers/i18n-provider.tsx

@@ -322,6 +322,88 @@ const dictionaries = {
     "dashboard.onboarding.timezone": "Časové pásmo",
     "dashboard.onboarding.submit": "Vytvořit prostor",
     "dashboard.onboarding.pending": "Vytvářím prostor...",
+    "dashboard.revenueTitle": "Trend rezervací",
+    "dashboard.revenueSubtitle": "Počet rezervací za posledních 7 dní",
+    "dashboard.noNotifications": "Žádná nová oznámení",
+    "dashboard.markAllRead": "Označit vše jako přečtené",
+    "dashboard.notifications.title": "Oznámení",
+    "dashboard.demoBanner": "Demo režim",
+    "dashboard.demoBannerDesc": "Prozkoumáte Bookra s ukázkovými daty. Pro plnou funkčnost se zaregistrujte.",
+    "dashboard.demoBannerCTA": "Vytvořit účet",
+    "dashboard.tryDemo": "Vyzkoušet demo",
+    "dashboard.language": "Jazyk",
+    "dashboard.calendar.noBookings": "Tento den nemáte žádné rezervace.",
+    "dashboard.calendar.bookingsCount": "rezervací",
+    "dashboard.chart.bookingsTrend": "Rezervace",
+    "dashboard.chart.revenueTrend": "Obrat",
+    "dashboard.recentActivity.empty": "Zatím žádná aktivita. Rezervace se zobrazí zde.",
+    "dashboard.filter.all": "Vše",
+    "dashboard.filter.today": "Dnes",
+    "dashboard.filter.week": "Týden",
+    "dashboard.filter.month": "Měsíc",
+    "dashboard.search.placeholder": "Hledat...",
+    "dashboard.search.bookings": "Hledat podle jména, služby nebo reference...",
+    "dashboard.search.customers": "Hledat podle jména, emailu nebo telefonu...",
+    "dashboard.actions": "Akce",
+    "dashboard.customer.email": "E-mail",
+    "dashboard.customer.phone": "Telefon",
+    "dashboard.customer.totalBookings": "Celkem rezervací",
+    "dashboard.customer.lastVisit": "Poslední návštěva",
+    "dashboard.customer.status": "Stav",
+    "dashboard.customer.notes": "Poznámky",
+    "dashboard.customer.noNotes": "Žádné poznámky",
+    "dashboard.customer.bookings": "Rezervace zákazníka",
+    "dashboard.customer.noBookings": "Žádné rezervace",
+    "dashboard.zone.add": "Přidat zónu",
+    "dashboard.zone.name": "Název",
+    "dashboard.zone.type": "Typ",
+    "dashboard.zone.capacity": "Kapacita",
+    "dashboard.zone.limitReached": "Dosáhli jste limitu",
+    "dashboard.zone.rooms": "Místnost",
+    "dashboard.zone.private": "Soukromá místnost",
+    "dashboard.zone.hall": "Sál",
+    "dashboard.zone.blockedDays": "Blokované dny",
+    "dashboard.zone.workingHours": "Pracovní doba",
+    "dashboard.zone.open": "Otevřeno",
+    "dashboard.zone.close": "Zavřeno",
+    "dashboard.zone.addBlocked": "Přidat blokovaný den",
+    "dashboard.zone.reason": "Důvod",
+    "dashboard.zone.noZones": "Zatím nemáte žádné zóny. Přidejte první.",
+    "dashboard.billing.planUsage": "Využití plánu",
+    "dashboard.billing.locations": "Lokace",
+    "dashboard.billing.bookings": "Rezervace",
+    "dashboard.billing.staff": "Zaměstnanci",
+    "dashboard.billing.period": "Období",
+    "dashboard.billing.currentPlan": "Aktuální plán",
+    "dashboard.billing.nextBilling": "Další fakturace",
+    "dashboard.settings.businessInfo": "Informace o podniku",
+    "dashboard.settings.branding": "Branding a vzhled",
+    "dashboard.settings.emailNotifications": "E-mailová oznámení",
+    "dashboard.settings.emailSubject": "Předmět",
+    "dashboard.settings.emailBody": "Obsah",
+    "dashboard.settings.save": "Uložit",
+    "dashboard.bookingModal.customer": "Zákazník",
+    "dashboard.bookingModal.service": "Služba",
+    "dashboard.bookingModal.location": "Místo",
+    "dashboard.bookingModal.dateTime": "Datum a čas",
+    "dashboard.bookingModal.duration": "Délka",
+    "dashboard.bookingModal.status": "Stav",
+    "dashboard.bookingModal.reference": "Reference",
+    "dashboard.bookingModal.notes": "Poznámky",
+    "dashboard.bookingModal.reschedule": "Přeplánovat",
+    "dashboard.bookingModal.confirmCancel": "Opravdu chcete zrušit tuto rezervaci?",
+    "dashboard.bookingModal.createdAt": "Vytvořeno",
+    "dashboard.bookingModal.assignedTo": "Přiřazeno",
+    "dashboard.bookingModal.noAssign": "Nepřiřazeno",
+    "dashboard.bookingModal.email": "E-mail",
+    "dashboard.bookingModal.phone": "Telefon",
+    "dashboard.empty.title": "Zatím prázdné",
+    "dashboard.empty.bookingsDesc": "Žádné rezervace neodpovídají vašemu filtru.",
+    "dashboard.empty.customersDesc": "Zatím nemáte žádné zákazníky.",
+    "dashboard.notification.newBooking": "Nová rezervace od",
+    "dashboard.notification.reminder": "Připomínka: rezervace u",
+    "dashboard.notification.upgrade": "Blížíte se limitu plánu",
+    "dashboard.notification.trialEnding": "Vaše zkušební doba končí za 3 dny",
     "booking.title": "Rezervace",
     "booking.body": "Vyberte dostupný termín, doplňte kontaktní údaje a potvrzení přijde e-mailem.",
     "booking.slots": "Dostupné termíny",
@@ -340,6 +422,7 @@ const dictionaries = {
     "booking.customer.body": "Tyto údaje použijeme pro potvrzení rezervace a připomenutí.",
     "booking.customer.name": "Jméno",
     "booking.customer.email": "E-mail",
+    "booking.customer.phone": "Telefon",
     "booking.customer.notes": "Poznámka",
     "booking.customerRequired": "Před rezervací vyplňte jméno a e-mail.",
     "booking.failed": "Rezervaci se nepodařilo vytvořit",
@@ -719,6 +802,88 @@ const dictionaries = {
     "dashboard.onboarding.timezone": "Timezone",
     "dashboard.onboarding.submit": "Create workspace",
     "dashboard.onboarding.pending": "Creating workspace...",
+    "dashboard.revenueTitle": "Booking trend",
+    "dashboard.revenueSubtitle": "Bookings over the last 7 days",
+    "dashboard.noNotifications": "No new notifications",
+    "dashboard.markAllRead": "Mark all as read",
+    "dashboard.notifications.title": "Notifications",
+    "dashboard.demoBanner": "Demo mode",
+    "dashboard.demoBannerDesc": "You're exploring Bookra with sample data. Register for full functionality.",
+    "dashboard.demoBannerCTA": "Create account",
+    "dashboard.tryDemo": "Try demo",
+    "dashboard.language": "Language",
+    "dashboard.calendar.noBookings": "No bookings for this day.",
+    "dashboard.calendar.bookingsCount": "bookings",
+    "dashboard.chart.bookingsTrend": "Bookings",
+    "dashboard.chart.revenueTrend": "Revenue",
+    "dashboard.recentActivity.empty": "No activity yet. Bookings will appear here.",
+    "dashboard.filter.all": "All",
+    "dashboard.filter.today": "Today",
+    "dashboard.filter.week": "Week",
+    "dashboard.filter.month": "Month",
+    "dashboard.search.placeholder": "Search...",
+    "dashboard.search.bookings": "Search by name, service or reference...",
+    "dashboard.search.customers": "Search by name, email or phone...",
+    "dashboard.actions": "Actions",
+    "dashboard.customer.email": "Email",
+    "dashboard.customer.phone": "Phone",
+    "dashboard.customer.totalBookings": "Total bookings",
+    "dashboard.customer.lastVisit": "Last visit",
+    "dashboard.customer.status": "Status",
+    "dashboard.customer.notes": "Notes",
+    "dashboard.customer.noNotes": "No notes",
+    "dashboard.customer.bookings": "Customer bookings",
+    "dashboard.customer.noBookings": "No bookings",
+    "dashboard.zone.add": "Add zone",
+    "dashboard.zone.name": "Name",
+    "dashboard.zone.type": "Type",
+    "dashboard.zone.capacity": "Capacity",
+    "dashboard.zone.limitReached": "Limit reached",
+    "dashboard.zone.rooms": "Room",
+    "dashboard.zone.private": "Private room",
+    "dashboard.zone.hall": "Hall",
+    "dashboard.zone.blockedDays": "Blocked days",
+    "dashboard.zone.workingHours": "Working hours",
+    "dashboard.zone.open": "Open",
+    "dashboard.zone.close": "Close",
+    "dashboard.zone.addBlocked": "Add blocked day",
+    "dashboard.zone.reason": "Reason",
+    "dashboard.zone.noZones": "No zones yet. Add your first one.",
+    "dashboard.billing.planUsage": "Plan usage",
+    "dashboard.billing.locations": "Locations",
+    "dashboard.billing.bookings": "Bookings",
+    "dashboard.billing.staff": "Staff",
+    "dashboard.billing.period": "Period",
+    "dashboard.billing.currentPlan": "Current plan",
+    "dashboard.billing.nextBilling": "Next billing",
+    "dashboard.settings.businessInfo": "Business information",
+    "dashboard.settings.branding": "Branding & appearance",
+    "dashboard.settings.emailNotifications": "Email notifications",
+    "dashboard.settings.emailSubject": "Subject",
+    "dashboard.settings.emailBody": "Body",
+    "dashboard.settings.save": "Save",
+    "dashboard.bookingModal.customer": "Customer",
+    "dashboard.bookingModal.service": "Service",
+    "dashboard.bookingModal.location": "Location",
+    "dashboard.bookingModal.dateTime": "Date & time",
+    "dashboard.bookingModal.duration": "Duration",
+    "dashboard.bookingModal.status": "Status",
+    "dashboard.bookingModal.reference": "Reference",
+    "dashboard.bookingModal.notes": "Notes",
+    "dashboard.bookingModal.reschedule": "Reschedule",
+    "dashboard.bookingModal.confirmCancel": "Are you sure you want to cancel this booking?",
+    "dashboard.bookingModal.createdAt": "Created",
+    "dashboard.bookingModal.assignedTo": "Assigned to",
+    "dashboard.bookingModal.noAssign": "Not assigned",
+    "dashboard.bookingModal.email": "Email",
+    "dashboard.bookingModal.phone": "Phone",
+    "dashboard.empty.title": "Nothing here yet",
+    "dashboard.empty.bookingsDesc": "No bookings match your filter.",
+    "dashboard.empty.customersDesc": "You don't have any customers yet.",
+    "dashboard.notification.newBooking": "New booking from",
+    "dashboard.notification.reminder": "Reminder: booking at",
+    "dashboard.notification.upgrade": "You're nearing your plan limit",
+    "dashboard.notification.trialEnding": "Your trial ends in 3 days",
     "booking.title": "Book a visit",
     "booking.body": "Choose an available time, add your contact details, and receive confirmation by email.",
     "booking.slots": "Available times",
@@ -737,6 +902,7 @@ const dictionaries = {
     "booking.customer.body": "These details are used for confirmation and reminders.",
     "booking.customer.name": "Name",
     "booking.customer.email": "Email",
+    "booking.customer.phone": "Phone",
     "booking.customer.notes": "Note",
     "booking.customerRequired": "Add your name and email before booking.",
     "booking.failed": "Booking failed",