feat(i18n): add VAT labels and email sent messages in German and English

style(admin): increase max-width of admin page and adjust table styles

fix(n8n): enhance workflow import and publishing process

fix(workflows): update SQL queries for fetching and updating sales orders

feat(migrations): normalize rental types and enhance email guard for individuell rentals

feat(migrations): add RPC for updating deposit in sales orders

fix(migrations): ensure individuell orders persist net/vat components and backfill existing records

test: update last run status to failed

supabase/migrations/15-individuell-vat-subtotal-fix.sql

@@ -0,0 +1,61 @@
+-- Ensure individuell orders persist net/vat components when total is manually set
+-- and backfill existing records where these fields are still zero.
+
+create or replace function public.sales_order_set_total(p_so_id uuid, p_total_eur integer)
+returns void
+language plpgsql
+security invoker
+as $$
+declare
+    v_so public.sales_orders;
+    v_subtotal_eur integer := 0;
+    v_vat_eur integer := 0;
+begin
+    select * into v_so from public.sales_orders where id = p_so_id for update;
+    if not found then
+        raise exception 'sales order % not found', p_so_id;
+    end if;
+
+    if v_so.rental_type != 'individuell' then
+        raise exception 'can only set total for individuell orders';
+    end if;
+
+    if coalesce(p_total_eur, 0) < 0 then
+        raise exception 'total must be >= 0';
+    end if;
+
+    if p_total_eur > 0 then
+        v_subtotal_eur := round(p_total_eur / 1.2);
+        v_vat_eur := p_total_eur - v_subtotal_eur;
+    end if;
+
+    update public.sales_orders
+       set total_eur = p_total_eur,
+           subtotal_eur = v_subtotal_eur,
+           vat_eur = v_vat_eur,
+           daily_subtotal = v_subtotal_eur,
+           weekend_subtotal = 0,
+           weekday_count = coalesce(total_days, 0),
+           weekend_day_count = 0,
+           updated_at = now()
+     where id = p_so_id;
+end;
+$$;
+
+grant execute on function public.sales_order_set_total(uuid, integer) to authenticated;
+
+-- Backfill already existing individuell orders with missing net/vat split.
+update public.sales_orders
+   set subtotal_eur = round(total_eur / 1.2),
+       vat_eur = total_eur - round(total_eur / 1.2),
+       daily_subtotal = round(total_eur / 1.2),
+       weekend_subtotal = 0,
+       weekday_count = coalesce(total_days, 0),
+       weekend_day_count = 0,
+       updated_at = now()
+ where rental_type = 'individuell'
+   and coalesce(total_eur, 0) > 0
+   and coalesce(subtotal_eur, 0) = 0
+   and coalesce(vat_eur, 0) = 0;
+
+notify pgrst, 'reload schema';