Add unit API and article unitamount/unitSi patch.

Units use the selected company; article PATCH accepts name/unitamount/unitSi.

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

@@ -5,8 +5,8 @@ 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` (gross), `tax` (rate %, ensured via tax.ensure), optional `minmultiplier` (default 1).
-Stored as net = gross / (1 + tax/100). Empty `prices` clears all POS prices. Returns the same shape as GET by SKU.
+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
@@ -21,11 +21,11 @@ Stored as net = gross / (1 + tax/100). Empty `prices` clears all POS prices. Ret
 {
   "prices": [
     {
-      "price": 11.9,
+      "price": 10.5,
       "tax": 19
     },
     {
-      "price": 99,
+      "price": 9.9,
       "tax": 19,
       "minmultiplier": 10
     }

docs/api/routes/article/update.md

@@ -4,7 +4,9 @@ Protected. Requires a valid session cookie (`credentials: 'include'`).
 
 Update article by SKU
 
-Updates an article name by SKU; returns the same detail shape as GET.
+Patches article fields. At least one of `name`, `unitamount`, `unitSi` required.
+`unitSi` must already exist for the company. Returns the same detail shape as GET.
+
 
 ## Path parameters
 
@@ -16,7 +18,8 @@ Updates an article name by SKU; returns the same detail shape as GET.
 
 ```json
 {
-  "name": "Updated name"
+  "unitamount": 0.24,
+  "unitSi": "l"
 }
 ```
 
@@ -34,10 +37,10 @@ Updated article detail
 
 | Status | Description |
 |--------|-------------|
-| 400 | Validation error — `{"error":"…"}` |
+| 400 | Validation error (Name required / Invalid unitamount) — `{"error":"…"}` |
 | 401 | Unauthorized — `{"error":"…"}` |
 | 403 | Not authorized — `{"error":"…"}` |
-| 404 | Article not found — `{"error":"…"}` |
+| 404 | Article or unit not found — `{"error":"…"}` |
 
 ---
 

docs/api/routes/unit/delete.md

@@ -0,0 +1,33 @@
+# `DELETE /unit`
+
+Protected. Requires a valid session cookie (`credentials: 'include'`).
+
+Delete unit
+
+Deletes `si` for the selected company. Fails with `Unit in use` if articles still reference it.
+
+## Query parameters
+
+| Param | Required | Type | Description |
+|-------|----------|------|-------------|
+| `si` | yes | string |  |
+
+## Response `204`
+
+Deleted
+
+_No content_
+
+## Errors
+
+| Status | Description |
+|--------|-------------|
+| 400 | Missing si or no company selected — `{"error":"…"}` |
+| 401 | Unauthorized — `{"error":"…"}` |
+| 403 | Not authorized — `{"error":"…"}` |
+| 404 | Company or unit not found — `{"error":"…"}` |
+| 409 | Unit in use — `{"error":"…"}` |
+
+---
+
+_Generated from `@openapi` JSDoc. Do not edit by hand — run `npm run docs:api`._

docs/api/routes/unit/list.md

@@ -0,0 +1,30 @@
+# `GET /unit`
+
+Protected. Requires a valid session cookie (`credentials: 'include'`).
+
+List units
+
+Lists units for the authenticated user's selected company (default-language symbol/name).
+
+## Response `200`
+
+Unit list
+
+```json
+{
+  "units": []
+}
+```
+
+## Errors
+
+| Status | Description |
+|--------|-------------|
+| 400 | No company selected — `{"error":"…"}` |
+| 401 | Unauthorized — `{"error":"…"}` |
+| 403 | Not authorized — `{"error":"…"}` |
+| 404 | Company not found — `{"error":"…"}` |
+
+---
+
+_Generated from `@openapi` JSDoc. Do not edit by hand — run `npm run docs:api`._

docs/api/routes/unit/upsert.md

@@ -0,0 +1,44 @@
+# `PUT /unit`
+
+Protected. Requires a valid session cookie (`credentials: 'include'`).
+
+Upsert unit
+
+Insert or update unit by `si` for the selected company. Upserts `unittext` for the company language.
+`basesifactor` must be finite and `> 0`.
+
+
+## Body (JSON)
+
+```json
+{
+  "si": "l",
+  "basesi": "l",
+  "basesifactor": 1,
+  "symbol": "L",
+  "name": "Liter"
+}
+```
+
+## Response `200`
+
+Upserted unit
+
+```json
+{
+  "unit": { … }
+}
+```
+
+## Errors
+
+| Status | Description |
+|--------|-------------|
+| 400 | Invalid unit or no company selected — `{"error":"…"}` |
+| 401 | Unauthorized — `{"error":"…"}` |
+| 403 | Not authorized — `{"error":"…"}` |
+| 404 | Company not found — `{"error":"…"}` |
+
+---
+
+_Generated from `@openapi` JSDoc. Do not edit by hand — run `npm run docs:api`._