Add article history by SKU and SSE update signals for live clients.

Expose getHistoryBySku as GET /article/:sku/history, and document mutation-emitted company signals via GET /events.

docs/api/routes/article/add-image.md

@@ -20,6 +20,10 @@ Auth like GET by SKU.
 
 Raw binary (`image/avif`).
 
+## Signals
+
+On success, emits SSE signal: `article-<sku>` (see [`GET /events`](../events.md)).
+
 ## Response `201`
 
 Image stored and linked

docs/api/routes/article/create.md

@@ -15,6 +15,10 @@ Creates an article under an authorized category (`parentId`).
 }
 ```
 
+## Signals
+
+On success, emits SSE signal: `articles` (see [`GET /events`](../events.md)).
+
 ## Response `201`
 
 Created

docs/api/routes/article/delete-image.md

@@ -13,6 +13,10 @@ Removes `articlepic` and the `pic` row for this article (`fullHash`). Auth like
 | `sku` | yes | string |  |
 | `fullHash` | yes | string |  |
 
+## Signals
+
+On success, emits SSE signal: `article-<sku>` (see [`GET /events`](../events.md)).
+
 ## Response `204`
 
 Deleted

docs/api/routes/article/delete.md

@@ -15,6 +15,10 @@ Auth like GET by SKU.
 |-------|----------|------|-------------|
 | `sku` | yes | string | Article SKU |
 
+## Signals
+
+On success, emits SSE signal: `articles` (see [`GET /events`](../events.md)).
+
 ## Response `204`
 
 Deleted

docs/api/routes/article/history.md

@@ -0,0 +1,49 @@
+# `GET /article/{sku}/history`
+
+Protected. Requires a valid session cookie (`credentials: 'include'`).
+
+Get article history by SKU
+
+Returns `articlehistory` rows for the article, newest first (`date` DESC, `id` DESC).
+Auth like GET by SKU.
+
+
+## Path parameters
+
+| Param | Required | Type | Description |
+|-------|----------|------|-------------|
+| `sku` | yes | string | Article SKU |
+
+## Response `200`
+
+Article history (newest first)
+
+```json
+{
+  "history": [
+    {
+      "id": 42,
+      "date": "2026-08-05T07:15:00.000Z",
+      "text": "Name geändert von \"Tee\" auf \"Grüner Tee\"\nEinheit geändert von \"500g\" auf \"1kg\""
+    },
+    {
+      "id": 41,
+      "date": "2026-08-01T09:00:00.000Z",
+      "text": "Name geändert von \"\" auf \"Tee\""
+    }
+  ]
+}
+```
+
+## Errors
+
+| Status | Description |
+|--------|-------------|
+| 400 | Missing sku — `{"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`._

docs/api/routes/article/order-images.md

@@ -25,6 +25,10 @@ Sets `articlepic.sort` to `0..n-1` in the given order.
 }
 ```
 
+## Signals
+
+On success, emits SSE signal: `article-<sku>` (see [`GET /events`](../events.md)).
+
 ## Response `200`
 
 New order

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

@@ -22,6 +22,10 @@ Pass `null` to clear the brand. Returns the same shape as GET by SKU.
 }
 ```
 
+## Signals
+
+On success, emits SSE signal: `article-<sku>` (see [`GET /events`](../events.md)).
+
 ## Response `200`
 
 Updated article detail

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

@@ -26,6 +26,10 @@ article from all categories. Returns the same shape as GET by SKU.
 }
 ```
 
+## Signals
+
+On success, emits SSE signal: `article-<sku>` (see [`GET /events`](../events.md)).
+
 ## Response `200`
 
 Updated article detail

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

@@ -24,6 +24,10 @@ empty array clears all EANs. Returns the same shape as GET by SKU.
 }
 ```
 
+## Signals
+
+On success, emits SSE signal: `article-<sku>` (see [`GET /events`](../events.md)).
+
 ## Response `200`
 
 Updated article detail

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

@@ -33,6 +33,10 @@ Empty `prices` clears all POS prices. Returns the same shape as GET by SKU.
 }
 ```
 
+## Signals
+
+On success, emits SSE signal: `article-<sku>` (see [`GET /events`](../events.md)).
+
 ## Response `200`
 
 Updated article detail

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

@@ -22,6 +22,10 @@ Returns the same shape as GET by SKU.
 }
 ```
 
+## Signals
+
+On success, emits SSE signal: `article-<sku>` (see [`GET /events`](../events.md)).
+
 ## Response `200`
 
 Updated article detail

docs/api/routes/article/update.md

@@ -23,6 +23,10 @@ Patches article fields. At least one of `name`, `unitamount`, `unitSi` required.
 }
 ```
 
+## Signals
+
+On success, emits SSE signal: `articles` (see [`GET /events`](../events.md)).
+
 ## Response `200`
 
 Updated article detail