fix(medications): localise the dose unit and lift it onto its own line

A medication's dose is stored as free text the wizard composes from an
amount and a unit token ("1 pieces", "2 tablets"), and the card rendered
that token verbatim glued onto the name — so the unit showed in English
on every locale and the title read "Test ABC 1 pieces".

Translate the dose at display time: a formatDose helper splits the stored
string and runs a known unit token through the existing unit messages, so
"1 pieces" reads "1 Stück" / "1 piece(s)" per locale while a custom
free-text dose passes through untouched. The card header now carries the
name alone on its title line with the dose on a muted line beneath it,
above the category badge; the detail view, table and intake dialogs
localise the same way. Vorsorge and lab rows pass an empty dose so they
render no extra line.

src/components/medications/wizard/steps/step3-dose.tsx

@@ -22,30 +22,11 @@ import {
 } from "@/lib/medications/injection-sites";
 import type { MedicationDeliveryForm } from "@/lib/validations/medication";
 import { unitsPerDoseOptionsFor } from "@/components/medications/units-per-dose";
+import { DOSE_UNIT_KEYS } from "@/lib/medications/dose-units";
 import { useTranslations } from "@/lib/i18n/context";
 
 import type { StepProps } from "./step1-name";
 
-/**
- * Dose unit choices, ordered so mg / ml / IE / µg lead and the
- * device-form units (Tablette, Hub, Sprühstoß, …) follow. Mirrors the
- * v1.5.3 list with the maintainer-requested order tightening.
- */
-const DOSE_UNIT_KEYS = [
-  "mg",
-  "ml",
-  "iu",
-  "mcg",
-  "g",
-  "tablets",
-  "capsules",
-  "drops",
-  "puffs",
-  "sprays",
-  "pieces",
-  "other",
-] as const;
-
 const DELIVERY_FORM_KEYS: readonly MedicationDeliveryForm[] = [
   "ORAL",
   "INJECTION",