fix(medications): release-QA findings on the inventory overhaul

- The legacy GLP-1 ledger reads again: GET and the Coach snapshot fall
  back to ledger-derived pen/dose figures when a medication has no
  inventory items; items always win once they exist. The delta branch
  on the POST is marked deprecated in favour of the inventory endpoints.
- Expired containers count as available nowhere: one shared supply
  summary (ACTIVE/IN_USE with units) feeds the overview row, the
  Bestand summary, the list payload, the GLP-1 card, and the runway
  estimate; expired units surface as a muted suffix instead.
- The inventory endpoints speak one wire dialect: request fields renamed
  to unitsTotal/unitsRemaining to match the responses, OpenAPI regenerated.
- The reorder dialog mirrors the page's grouping: active and inactive
  sections, each sortable within itself, so a saved order can never
  interleave them.
- Polish strings avoid the 2-4 plural trap, sub-dose quantities render
  as below one dose instead of approximately zero, and the table's name
  sort collates by the active locale instead of hardcoded German.

src/lib/openapi/routes/medications.ts

@@ -1005,7 +1005,7 @@ export const medicationPaths: NonNullable<ZodOpenApiObject["paths"]> = {
       tags: ["Medications"],
       summary: "Register a new supply container",
       description:
-        "Creates an ACTIVE inventory item with `unitsRemaining = unitsTotal`. The request's `dosesTotal` field carries UNITS (1–1000). Rate-limited 30/min/user. Audits as `medication.inventory.create`.",
+        "Creates an ACTIVE inventory item with `unitsRemaining = unitsTotal`. The request's `unitsTotal` field carries UNITS (1–1000). Rate-limited 30/min/user. Audits as `medication.inventory.create`.",
       requestParams: {
         path: z.object({ id: z.string() }),
       },
@@ -1040,7 +1040,7 @@ export const medicationPaths: NonNullable<ZodOpenApiObject["paths"]> = {
       tags: ["Medications"],
       summary: "Mutate a supply container",
       description:
-        "Per-item operations: manual first-use (`markAsFirstUseAt`), used-up override (`markAsUsedUp`), printed-expiry correction, absolute remaining-unit correction (`dosesRemaining`, clamped to the item's capacity), notes. The canonical state machine re-derives the state after every mutation. Audits as `medication.inventory.update`.",
+        "Per-item operations: manual first-use (`markAsFirstUseAt`), used-up override (`markAsUsedUp`), printed-expiry correction, absolute remaining-unit correction (`unitsRemaining`, clamped to the item's capacity), notes. The canonical state machine re-derives the state after every mutation. Audits as `medication.inventory.update`.",
       requestParams: {
         path: z.object({ id: z.string(), itemId: z.string() }),
       },