Add PUT /article/:sku/prices for POS price replace-all.

docs/api/routes/article/set-prices.md

@@ -0,0 +1,57 @@
+# `PUT /article/{sku}/prices`
+
+Protected. Requires a valid session cookie (`credentials: 'include'`).
+
+Replace POS prices by SKU
+
+Replace-all prices for the company POS customer group.
+Each entry: `price` (net), `tax` (rate, ensured via tax.ensure), optional `minmultiplier` (default 1).
+Empty `prices` clears all POS prices. Returns the same shape as GET by SKU.
+
+
+## Path parameters
+
+| Param | Required | Type | Description |
+|-------|----------|------|-------------|
+| `sku` | yes | string |  |
+
+## Body (JSON)
+
+```json
+{
+  "prices": [
+    {
+      "price": 10.5,
+      "tax": 19
+    },
+    {
+      "price": 9.9,
+      "tax": 19,
+      "minmultiplier": 10
+    }
+  ]
+}
+```
+
+## Response `200`
+
+Updated article detail
+
+```json
+{
+  "article": { … }
+}
+```
+
+## Errors
+
+| Status | Description |
+|--------|-------------|
+| 400 | Invalid prices or POS customer group required — `{"error":"…"}` |
+| 401 | Unauthorized — `{"error":"…"}` |
+| 403 | Not authorized — `{"error":"…"}` |
+| 404 | Article not found — `{"error":"…"}` |
+
+---
+
+_Generated from `@openapi` JSDoc. Do not edit by hand — run `npm run docs:api`._