diff --git a/src/automats/articleIndexAutomat.js b/src/automats/articleIndexAutomat.js
index 8f0a00b..8c10616 100644
--- a/src/automats/articleIndexAutomat.js
+++ b/src/automats/articleIndexAutomat.js
@@ -29,12 +29,17 @@
  */
 
 import { Automat } from 'react-automat';
+import { article as articleApi } from '../api';
 import authAutomat from './authAutomat';
 import categoryAutomat, { whenCategoryTreeReady } from './categoryAutomat';
+import sseAutomat from './sseAutomat';
 import {
   categoryViews,
   collectLoadedCategoryViewData,
   loadAllCategoryViews,
+  invalidateAllCategoryViews,
+  updateArticleInCategoryViews,
+  removeArticleBySku,
 } from './categoryViewAutomat';
 
 /**
@@ -98,7 +103,7 @@ function scheduleRebuild() {
 function toIndexRecord(article, categoryId) {
   const eans = article.eans ?? article.eanCodes ?? article.ean ?? null;
   const childCount = Number(article.childCount) || 0;
-  const price = article.price ?? article.net ?? article.vknetto ?? null;
+  const price = article.price ?? article.net ?? article.vknetto ?? (Array.isArray(article.prices) ? (article.prices.find((p) => p.minmultiplier === 1)?.net ?? article.prices[0]?.net) : null);
   const warehouses = Array.isArray(article.warehouses) ? article.warehouses : [];
   const trackStock = article.track_stock ?? article.trackStock;
   const stock = trackStock === false
@@ -111,6 +116,9 @@ function toIndexRecord(article, categoryId) {
   const available = article.available != null && !Number.isNaN(Number(article.available))
     ? Number(article.available)
     : stock;
+  const categories = categoryId != null
+    ? String(categoryId)
+    : (Array.isArray(article.categoryIds) ? article.categoryIds.join(',') : (article.categories ?? null));
 
   return {
     ...article,
@@ -126,7 +134,7 @@ function toIndexRecord(article, categoryId) {
       ? article.articlewarehousesummary
       : [],
     eans: Array.isArray(eans) ? eans.filter(Boolean) : eans ? [eans] : [],
-    categories: categoryId != null ? String(categoryId) : null,
+    categories,
     isParent: Boolean(article.isParent ?? article.is_parent ?? (childCount > 0)),
     childCount,
   };
@@ -258,6 +266,32 @@ const actions = {
     return items;
   },
 
+  /**
+   * Refetches and updates a single article in the index and category views by SKU.
+   *
+   * @param {string|number} sku Article SKU.
+   * @returns {Promise<object|null>} Fresh article or null.
+   */
+  async updateArticleBySku(sku) {
+    const key = String(sku);
+    try {
+      const res = await articleApi.getBySku(key);
+      const article = res?.article;
+      if (article) {
+        updateArticleIndexRecord(article);
+        return article;
+      }
+      return null;
+    } catch (err) {
+      if (err?.status === 404 || err?.statusCode === 404) {
+        removeArticleBySku(key);
+        const nextItems = articleIndexAutomat.state.items.filter((r) => String(r.sku) !== key);
+        articleIndexAutomat.setState({ items: nextItems });
+      }
+      return null;
+    }
+  },
+
   /** Reset to idle state (logout / company switch). */
   reset() {
     inflightEnsure = null;
@@ -294,6 +328,72 @@ authAutomat.subscribe((auth) => {
   if (auth.status === 'anon') actions.reset();
 });
 
+// Upstream Trigger: sseAutomat
+if (sseAutomat?.actions?.onArticle) {
+  sseAutomat.actions.onArticle(async (sku) => {
+    if (articleIndexAutomat.state.status === 'ready') {
+      await actions.updateArticleBySku(sku);
+    }
+  });
+}
+
+if (sseAutomat?.actions?.on) {
+  sseAutomat.actions.on('articles', () => {
+    invalidateAllCategoryViews();
+    void actions.reload().catch(() => {});
+  });
+
+  sseAutomat.actions.on('warehouse', () => {
+    invalidateAllCategoryViews();
+    void actions.reload().catch(() => {});
+  });
+}
+
+/**
+ * Updates a single article record in the derived index and loaded category views.
+ *
+ * @param {object} article Article detail or row.
+ * @returns {Array<ArticleIndexRecord>|undefined} Updated items array.
+ */
+export function updateArticleIndexRecord(article) {
+  if (!article || article.sku == null) return;
+  const key = String(article.sku);
+  updateArticleInCategoryViews(article);
+
+  const items = articleIndexAutomat.state.items;
+  if (!items || !items.length) return;
+
+  const existingIndex = items.findIndex((r) => String(r.sku) === key);
+  const categoryIds = Array.isArray(article.categoryIds)
+    ? article.categoryIds.map(String)
+    : [];
+  const primaryCatId = categoryIds[0] ?? null;
+
+  const record = toIndexRecord(article, primaryCatId);
+  if (categoryIds.length > 0) {
+    record.categories = categoryIds.join(',');
+  }
+
+  let nextItems;
+  if (existingIndex >= 0) {
+    const existing = items[existingIndex];
+    nextItems = [...items];
+    nextItems[existingIndex] = {
+      ...existing,
+      ...record,
+      categories: record.categories ?? existing.categories,
+      smallThumbBinary: article.smallThumbBinary ?? article.photos?.[0]?.smallThumbBinary ?? existing.smallThumbBinary,
+      brand: article.brand ?? existing.brand,
+      brandName: article.brand?.name ?? article.brandName ?? existing.brandName,
+    };
+  } else {
+    nextItems = [...items, record];
+  }
+
+  articleIndexAutomat.setState({ items: nextItems });
+  return nextItems;
+}
+
 /**
  * Patches a single record's name in the derived index (optimistic update).
  *
diff --git a/src/automats/artikelAutomat.js b/src/automats/artikelAutomat.js
index 6611b3c..ebf5f84 100644
--- a/src/automats/artikelAutomat.js
+++ b/src/automats/artikelAutomat.js
@@ -20,7 +20,12 @@ import { Automat } from 'react-automat';
 import { article as articleApi } from '../api';
 import { requireDefined, requireObject } from '../utils/apiShape';
 import authAutomat from './authAutomat';
-import articleIndexAutomat, { setArticleIndexName, setArticleIndexStock } from './articleIndexAutomat';
+import articleIndexAutomat, {
+  setArticleIndexName,
+  setArticleIndexStock,
+  updateArticleIndexRecord,
+} from './articleIndexAutomat';
+import sseAutomat from './sseAutomat';
 
 /**
  * @typedef {Object} ArtikelState
@@ -113,12 +118,7 @@ const actions = {
     artikelAutomat.setState({
       bySku: { ...artikelAutomat.state.bySku, [key]: article },
     });
-    if (article.warehouses || article.stock != null) {
-      setArticleIndexStock(article.sku, {
-        stock: article.stock,
-        warehouses: article.warehouses,
-      });
-    }
+    updateArticleIndexRecord(article);
     return article;
   },
 
@@ -325,4 +325,14 @@ authAutomat.subscribe((auth) => {
   }
 });
 
+// Upstream Trigger: sseAutomat
+if (sseAutomat?.actions?.onArticle) {
+  sseAutomat.actions.onArticle((sku) => {
+    const key = String(sku);
+    if (key in artikelAutomat.state.bySku) {
+      void actions.reloadArticle(key).catch(() => {});
+    }
+  });
+}
+
 export default artikelAutomat;
diff --git a/src/automats/categoryAutomat.js b/src/automats/categoryAutomat.js
index 5bb7dcc..80e5ab5 100644
--- a/src/automats/categoryAutomat.js
+++ b/src/automats/categoryAutomat.js
@@ -30,6 +30,7 @@ import { Automat } from 'react-automat';
 import { category as categoryApi, article as articleApi } from '../api';
 import authAutomat from './authAutomat';
 import companyAutomat from './companyAutomat';
+import sseAutomat from './sseAutomat';
 import {
   attachCategoryTree,
   categoryViews,
@@ -37,6 +38,7 @@ import {
   disposeAllCategoryViewAutomats,
   refreshCategoryViewChildren,
   appendArticlesToCategoryViews,
+  updateArticleInCategoryViews,
   removeArticleBySku,
   waitForCategoryTree,
 } from './categoryViewAutomat';
@@ -512,6 +514,14 @@ authAutomat.subscribe((auth) => {
   }
 });
 
+// Upstream Trigger: sseAutomat
+if (sseAutomat?.actions?.on) {
+  sseAutomat.actions.on('category', () => {
+    void categoryAutomat.actions.loadTree().catch(() => {});
+    invalidateAllCategoryViews();
+  });
+}
+
 // Re-export pure helpers for consumers that previously imported from categorySlice
 export {
   ROOT_CATEGORY_NAME,
@@ -532,6 +542,7 @@ export {
   disposeAllCategoryViewAutomats,
   loadAllCategoryViews,
   collectLoadedCategoryViewData,
+  updateArticleInCategoryViews,
 } from './categoryViewAutomat';
 
 export default categoryAutomat;
diff --git a/src/automats/categoryViewAutomat.js b/src/automats/categoryViewAutomat.js
index e99ebcb..b2308ea 100644
--- a/src/automats/categoryViewAutomat.js
+++ b/src/automats/categoryViewAutomat.js
@@ -323,6 +323,64 @@ export function appendArticlesToCategoryViews({ categoryId, articles }) {
   }
 }
 
+/**
+ * Updates an article in all loaded category views.
+ *
+ * @param {object} article Article detail or row with at least `sku`.
+ * @returns {void}
+ */
+export function updateArticleInCategoryViews(article) {
+  if (!article || article.sku == null) return;
+  const sku = String(article.sku);
+  const targetCategoryIds = Array.isArray(article.categoryIds)
+    ? new Set(article.categoryIds.map(String))
+    : null;
+
+  for (const [slug, item] of categoryViews._items.entries()) {
+    if (!item?.data) continue;
+    const viewCatId = String(item.data.categoryId);
+    const existingIndex = (item.data.articles || []).findIndex((r) => String(r.sku) === sku);
+
+    if (existingIndex >= 0) {
+      if (targetCategoryIds && !targetCategoryIds.has(viewCatId)) {
+        // Article moved out of this category
+        categoryViews.key(slug).set({
+          ...item.data,
+          articles: item.data.articles.filter((r) => String(r.sku) !== sku),
+        });
+      } else {
+        // Update in-place
+        const existing = item.data.articles[existingIndex];
+        const updatedArticles = [...item.data.articles];
+        updatedArticles[existingIndex] = {
+          ...existing,
+          ...article,
+          name: article.name ?? existing.name,
+          price: article.price ?? (Array.isArray(article.prices) ? article.prices[0]?.net : null) ?? article.net ?? existing.price,
+          net: article.net ?? article.price ?? (Array.isArray(article.prices) ? article.prices[0]?.net : null) ?? existing.net,
+          stock: article.stock ?? existing.stock,
+          available: article.available ?? existing.available,
+          warehouses: article.warehouses ?? existing.warehouses,
+          brand: article.brand ?? existing.brand,
+          brandName: article.brand?.name ?? article.brandName ?? existing.brandName,
+          childCount: article.childCount ?? existing.childCount,
+          isParent: Boolean(article.childCount > 0 || article.isParent || existing.isParent),
+        };
+        categoryViews.key(slug).set({
+          ...item.data,
+          articles: updatedArticles,
+        });
+      }
+    } else if (targetCategoryIds && targetCategoryIds.has(viewCatId)) {
+      // Article added to this category
+      categoryViews.key(slug).set({
+        ...item.data,
+        articles: [...(item.data.articles || []), article],
+      });
+    }
+  }
+}
+
 /**
  * Removes a deleted article from every loaded view that contains it.
  *
diff --git a/src/automats/index.js b/src/automats/index.js
index 80fec28..c454244 100644
--- a/src/automats/index.js
+++ b/src/automats/index.js
@@ -56,6 +56,7 @@ export {
   default as articleIndexAutomat,
   setArticleIndexName,
   setArticleIndexStock,
+  updateArticleIndexRecord,
   buildArticleIndex,
   selectArticleIndexItems,
 } from './articleIndexAutomat';
diff --git a/src/automats/sseAutomat.js b/src/automats/sseAutomat.js
index 60b3c6a..805fbc7 100644
--- a/src/automats/sseAutomat.js
+++ b/src/automats/sseAutomat.js
@@ -28,6 +28,7 @@ import authAutomat from './authAutomat';
  * @property {string|null} companyId Company the stream is bound to.
  * @property {string|null} clientId Tab-scoped random session id sent as `?cid=` to `/api/events`.
  * @property {Array<{id: number, type: string, data: string, lastEventId: string, time: number}>} events Recent stream events.
+ * @property {{id: number, type: string, data: string, lastEventId: string, time: number}|null} lastEvent Most recent event.
  */
 
 const EVENT_HISTORY_LIMIT = 200;
@@ -68,6 +69,7 @@ const initialState = {
   companyId: null,
   clientId: sseClientId,
   events: [],
+  lastEvent: null,
 };
 
 /** Event name prefix for per-article signals. */
@@ -76,18 +78,20 @@ const ARTICLE_EVENT_PREFIX = 'article-';
 let sseAutomat;
 /** @type {EventSource | null} */
 let eventSource = null;
+/** @type {AbortController | null} */
+let streamAbortController = null;
+let reconnectTimer = null;
 
 /**
- * Handlers for statically named events (`category`, `articles`, …).
- * @type {Map<string, Set<{handler: (event: MessageEvent) => void, detach: (() => void)|null}>>}
+ * Handlers for event subscriptions (`category`, `articles`, `article-*`, …).
+ * @type {Map<string, Set<{handler: Function, detach: (() => void)|null}>>}
  */
 const handlers = new Map();
 let nextEventId = 0;
 const seenEvents = new WeakSet();
 
 /**
- * Handlers per watched SKU, so one `article-<sku>` listener is attached while
- * at least one view is open on that SKU.
+ * Handlers per watched SKU.
  * @type {Map<string, Set<(sku: string) => void>>}
  */
 const articleWatchers = new Map();
@@ -99,25 +103,41 @@ function recordEvent(event) {
   const entry = {
     id: ++nextEventId,
     type: event.type,
-    data: typeof event.data === 'string' ? event.data : '',
+    data: typeof event.data === 'string' ? event.data : (event.data ? JSON.stringify(event.data) : ''),
     lastEventId: event.lastEventId ?? '',
     time: Date.now(),
   };
   sseAutomat.setState((state) => ({
     events: [...state.events.slice(-(EVENT_HISTORY_LIMIT - 1)), entry],
+    lastEvent: entry,
   }));
 }
 
-function addTrackedListener(es, type, handler) {
-  const listener = (event) => {
-    recordEvent(event);
-    handler(event);
-  };
-  es.addEventListener(type, listener);
-  return () => es.removeEventListener(type, listener);
+function clearReconnectTimer() {
+  if (reconnectTimer) {
+    clearTimeout(reconnectTimer);
+    reconnectTimer = null;
+  }
+}
+
+function scheduleReconnect() {
+  clearReconnectTimer();
+  const auth = authAutomat.state;
+  const hasAuth = auth.hasAuth ?? (auth.status === 'authed' && Boolean(auth.user));
+  if (!hasAuth) return;
+
+  reconnectTimer = setTimeout(() => {
+    reconnectTimer = null;
+    connect();
+  }, 1500);
 }
 
 function disconnect() {
+  clearReconnectTimer();
+  if (streamAbortController) {
+    streamAbortController.abort();
+    streamAbortController = null;
+  }
   if (eventSource) {
     console.log('[sse] disconnect');
     try {
@@ -125,21 +145,136 @@ function disconnect() {
     } catch {}
     eventSource = null;
   }
-  if (sseAutomat.state.status !== 'disconnected') {
+  if (sseAutomat && sseAutomat.state.status !== 'disconnected') {
     sseAutomat.setState({ status: 'disconnected' });
   }
 }
 
 /**
- * Attaches every registered handler to a freshly opened stream.
+ * Dispatches an incoming event through registered handlers and article watchers.
  *
- * @param {EventSource} es Open event stream.
- * @returns {void}
+ * @param {{ type: string, data: any, lastEventId?: string }} event
  */
+function dispatchSseEvent(event) {
+  recordEvent(event);
+
+  const eventType = String(event.type);
+
+  // 1. Built-in system handling (e.g. user / company switch sync)
+  if (eventType === 'user') {
+    try {
+      const payload = typeof event.data === 'string' ? JSON.parse(event.data || '{}') : (event.data || {});
+      const nextCompanyId = payload.selectedCompanyId ?? null;
+
+      if (authAutomat.state.user?.selectedCompanyId !== nextCompanyId) {
+        authAutomat.setState((prev) => ({
+          ...prev,
+          user: prev.user ? { ...prev.user, selectedCompanyId: nextCompanyId } : prev.user,
+          hasCompany: Boolean((prev.hasAuth ?? (prev.status === 'authed' && prev.user)) && nextCompanyId != null),
+        }));
+      }
+    } catch (err) {
+      console.error('[sse] failed to handle user event', err);
+    }
+  }
+
+  // 2. Dispatch to exact handlers registered via on(eventType, handler)
+  const exactSet = handlers.get(eventType);
+  if (exactSet && exactSet.size > 0) {
+    for (const entry of exactSet) {
+      try {
+        entry.handler(event);
+      } catch (err) {
+        console.error(`[sse] error in handler for ${eventType}:`, err);
+      }
+    }
+  } else {
+    // Fallback direct dispatch if store didn't subscribe yet
+    if (eventType === 'articles') {
+      Automat.get('category')?.actions?.invalidateAllCategoryViews?.();
+      void Automat.get('articleIndex')?.actions?.reload?.().catch(() => {});
+    } else if (eventType === 'category') {
+      void Automat.get('category')?.actions?.loadTree?.().catch(() => {});
+      Automat.get('category')?.actions?.invalidateAllCategoryViews?.();
+    } else if (eventType === 'company') {
+      void Automat.get('company')?.actions?.reload?.().catch(() => {});
+    } else if (eventType === 'warehouse') {
+      void Automat.get('company')?.actions?.reloadWarehouses?.().catch(() => {});
+      Automat.get('category')?.actions?.invalidateAllCategoryViews?.();
+      void Automat.get('articleIndex')?.actions?.reload?.().catch(() => {});
+    } else if (eventType === 'order') {
+      void Automat.get('order')?.actions?.reload?.().catch(() => {});
+      void Automat.get('shipment')?.actions?.reload?.().catch(() => {});
+    } else if (eventType === 'delivery') {
+      void Automat.get('delivery')?.actions?.reload?.().catch(() => {});
+    } else if (eventType === 'retoure') {
+      void Automat.get('retoure')?.actions?.reload?.().catch(() => {});
+    } else if (eventType === 'quote') {
+      void Automat.get('quote')?.actions?.reload?.().catch(() => {});
+    } else if (eventType === 'shipment') {
+      void Automat.get('shipment')?.actions?.reload?.().catch(() => {});
+    }
+  }
+
+  // 3. Dispatch to article-specific handlers if it starts with article-
+  if (eventType.startsWith(ARTICLE_EVENT_PREFIX)) {
+    const sku = eventType.slice(ARTICLE_EVENT_PREFIX.length);
+
+    // Watchers registered via watchArticle(sku, handler)
+    const watchers = articleWatchers.get(sku);
+    if (watchers) {
+      for (const handler of watchers) {
+        try {
+          handler(sku);
+        } catch (err) {
+          console.error(`[sse] error in article watcher for ${sku}:`, err);
+        }
+      }
+    }
+
+    // Article wildcard handlers (registered via on('article-*', ...) or onArticle(...))
+    const articleWildcard = handlers.get('article-*');
+    if (articleWildcard) {
+      for (const entry of articleWildcard) {
+        try {
+          entry.handler(sku, event);
+        } catch (err) {
+          console.error('[sse] error in article-* handler:', err);
+        }
+      }
+    }
+
+    // Single article detail & history/supplier caches invalidation
+    invalidateArticle(sku);
+  }
+
+  // 4. Wildcard handlers registered via on('*', handler)
+  const allWildcard = handlers.get('*');
+  if (allWildcard) {
+    for (const entry of allWildcard) {
+      try {
+        entry.handler(event);
+      } catch (err) {
+        console.error('[sse] error in * handler:', err);
+      }
+    }
+  }
+}
+
+function addTrackedListener(es, type, handler) {
+  const listener = (event) => {
+    dispatchSseEvent(event);
+    handler(event);
+  };
+  es.addEventListener(type, listener);
+  return () => es.removeEventListener(type, listener);
+}
+
 function attachHandlers(es) {
   for (const [event, set] of handlers) {
+    if (event === '*' || event === 'article-*') continue;
     for (const entry of set) {
-      entry.detach = addTrackedListener(es, event, entry.handler);
+      entry.detach = addTrackedListener(es, event, (ev) => dispatchSseEvent(ev));
     }
   }
   for (const [sku] of articleWatchers) {
@@ -147,25 +282,127 @@ function attachHandlers(es) {
   }
 }
 
-/**
- * Binds the single `article-<sku>` listener for a watched SKU.
- *
- * @param {string} sku Article SKU.
- * @returns {void}
- */
 function attachArticleListener(sku) {
   if (!eventSource) return;
   addTrackedListener(eventSource, `${ARTICLE_EVENT_PREFIX}${sku}`, (event) => {
-    const set = articleWatchers.get(sku);
-    if (!set || set.size === 0) return;
     const changed = String(event.type).slice(ARTICLE_EVENT_PREFIX.length);
-    for (const handler of set) handler(changed);
+    const set = articleWatchers.get(sku);
+    if (set) {
+      for (const handler of set) handler(changed);
+    }
   });
 }
 
+async function startFetchStream(url, companyId) {
+  if (streamAbortController) {
+    streamAbortController.abort();
+    streamAbortController = null;
+  }
+  const controller = new AbortController();
+  streamAbortController = controller;
+  const signal = controller.signal;
+
+  try {
+    const res = await fetch(url.href, {
+      credentials: 'include',
+      headers: { Accept: 'text/event-stream' },
+      signal,
+    });
+
+    if (signal.aborted) return;
+
+    if (!res.ok) {
+      if (res.status === 401) {
+        sseAutomat.setState({ status: 'disconnected' });
+        return;
+      }
+      throw new Error(`SSE HTTP ${res.status}`);
+    }
+
+    if (!res.body) {
+      throw new Error('Response body is null');
+    }
+
+    sseAutomat.setState({ status: 'connected', companyId });
+
+    const reader = res.body.getReader();
+    const decoder = new TextDecoder();
+    let buffer = '';
+    let eventType = 'message';
+    let eventData = '';
+    let lastEventId = '';
+
+    while (!signal.aborted) {
+      const { done, value } = await reader.read();
+      if (done) break;
+      buffer += decoder.decode(value, { stream: true });
+      const lines = buffer.split(/\r\n|\r|\n/);
+      buffer = lines.pop() ?? '';
+
+      for (const line of lines) {
+        if (line === '') {
+          if (eventData || eventType !== 'message') {
+            dispatchSseEvent({
+              type: eventType,
+              data: eventData,
+              lastEventId,
+            });
+          }
+          eventType = 'message';
+          eventData = '';
+        } else if (line.startsWith(':')) {
+          continue;
+        } else if (line.startsWith('event:')) {
+          eventType = line.slice(6).trim();
+        } else if (line.startsWith('data:')) {
+          const chunk = line.slice(5).trim();
+          eventData = eventData ? `${eventData}\n${chunk}` : chunk;
+        } else if (line.startsWith('id:')) {
+          lastEventId = line.slice(3).trim();
+        }
+      }
+    }
+  } catch (err) {
+    if (signal.aborted) return;
+    console.error('[sse] stream error', err);
+    recordEvent({ type: 'error', data: err?.message || '', lastEventId: '' });
+    sseAutomat.setState({ status: 'error' });
+  } finally {
+    if (!signal.aborted) {
+      scheduleReconnect();
+    }
+  }
+}
+
+function startEventSource(url, companyId) {
+  const es = new EventSource(url.href, { withCredentials: true });
+  eventSource = es;
+
+  addTrackedListener(es, 'open', () => {
+    sseAutomat.setState({ status: 'connected', companyId });
+  });
+
+  addTrackedListener(es, 'user', (event) => {
+    dispatchSseEvent(event);
+  });
+
+  addTrackedListener(es, 'message', (event) => {
+    dispatchSseEvent(event);
+  });
+
+  es.onerror = (e) => {
+    console.error('[sse] event stream error', e);
+    recordEvent(e || { type: 'error', data: '', lastEventId: '' });
+    sseAutomat.setState({ status: 'error' });
+  };
+
+  attachHandlers(es);
+}
+
 // #region connect
-// MARK: opens GET /api/events EventSource when hasAuth is true
+// MARK: opens GET /api/events stream when hasAuth is true
 function connect() {
+  clearReconnectTimer();
   const auth = authAutomat.state;
   const hasAuth = auth.hasAuth ?? (auth.status === 'authed' && Boolean(auth.user));
   if (!hasAuth) {
@@ -180,196 +417,11 @@ function connect() {
   console.log('[sse] connecting');
   sseAutomat.setState({ status: 'connecting', companyId });
 
-  const es = new EventSource(url.href, { withCredentials: true });
-
-  addTrackedListener(es, 'user', (event) => {
-    try {
-      const payload = JSON.parse(event.data || '{}');
-      const nextCompanyId = payload.selectedCompanyId ?? null;
-
-      if (authAutomat.state.user?.selectedCompanyId !== nextCompanyId) {
-        authAutomat.setState((prev) => ({
-          ...prev,
-          user: prev.user ? { ...prev.user, selectedCompanyId: nextCompanyId } : prev.user,
-          hasCompany: Boolean((prev.hasAuth ?? (prev.status === 'authed' && prev.user)) && nextCompanyId != null),
-        }));
-      }
-    } catch (err) {
-      console.error('[sse] failed to handle user event', err);
-    }
-  });
-
-  addTrackedListener(es, 'company', () => {
-    const comp = Automat.get('company');
-    if (comp?.actions?.reload) {
-      void comp.actions.reload().catch((err) => {
-        console.error('[sse] company refresh failed', err);
-      });
-    }
-  });
-
-  // Category tree changed: refresh the tree and every open category view.
-  addTrackedListener(es, 'category', () => {
-    const cat = Automat.get('category');
-    if (cat?.actions?.loadTree) {
-      void cat.actions.loadTree().catch((err) => {
-        console.error('[sse] category tree refresh failed', err);
-      });
-    }
-    cat?.actions?.invalidateAllCategoryViews?.();
-  });
-
-  // Article index changed: refresh the index and open category views.
-  addTrackedListener(es, 'articles', () => {
-    Automat.get('category')?.actions?.invalidateAllCategoryViews?.();
-    const idx = Automat.get('articleIndex');
-    if (idx?.actions?.reload) {
-      void idx.actions.reload().catch((err) => {
-        console.error('[sse] article index refresh failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'warehouse', () => {
-    const comp = Automat.get('company');
-    if (comp?.actions?.reloadWarehouses) {
-      void comp.actions.reloadWarehouses().catch((err) => {
-        console.error('[sse] warehouse refresh failed', err);
-      });
-    }
-    Automat.get('category')?.actions?.invalidateAllCategoryViews?.();
-    const idx = Automat.get('articleIndex');
-    if (idx?.actions?.reload) {
-      void idx.actions.reload().catch((err) => {
-        console.error('[sse] article index refresh on warehouse event failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'carrier', () => {
-    const comp = Automat.get('company');
-    if (comp?.actions?.reloadCarriers) {
-      void comp.actions.reloadCarriers().catch((err) => {
-        console.error('[sse] carrier refresh failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'attributename', () => {
-    const comp = Automat.get('company');
-    if (comp?.actions?.loadAttributes) {
-      void comp.actions.loadAttributes().catch((err) => {
-        console.error('[sse] attributename refresh failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'propertyname', () => {
-    const comp = Automat.get('company');
-    if (comp?.actions?.loadProperties) {
-      void comp.actions.loadProperties().catch((err) => {
-        console.error('[sse] propertyname refresh failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'supplier', () => {
-    const comp = Automat.get('company');
-    if (comp?.actions?.reloadSuppliers) {
-      void comp.actions.reloadSuppliers().catch((err) => {
-        console.error('[sse] supplier refresh failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'brand', (event) => {
-    try {
-      const payload = JSON.parse(event?.data ?? '{}');
-      if (payload?.sender && payload.sender === getSseClientId()) return;
-    } catch {}
-    const comp = Automat.get('company');
-    if (comp?.actions?.loadBrands) {
-      void comp.actions.loadBrands(true).catch(() => {});
-    }
-  });
-
-  addTrackedListener(es, 'order', () => {
-    const ord = Automat.get('order');
-    if (ord?.actions?.reload) {
-      void ord.actions.reload().catch((err) => {
-        console.error('[sse] order refresh failed', err);
-      });
-    }
-    const shp = Automat.get('shipment');
-    if (shp?.actions?.reload) {
-      void shp.actions.reload().catch((err) => {
-        console.error('[sse] shipment refresh failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'quote', () => {
-    const q = Automat.get('quote');
-    if (q?.actions?.reload) {
-      void q.actions.reload().catch((err) => {
-        console.error('[sse] quote refresh failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'shipment', () => {
-    const shp = Automat.get('shipment');
-    if (shp?.actions?.reload) {
-      void shp.actions.reload().catch((err) => {
-        console.error('[sse] shipment refresh failed', err);
-      });
-    }
-    const ord = Automat.get('order');
-    if (ord?.actions?.reload) {
-      void ord.actions.reload().catch((err) => {
-        console.error('[sse] order refresh failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'delivery', () => {
-    const del = Automat.get('delivery');
-    if (del?.actions?.reload) {
-      void del.actions.reload().catch((err) => {
-        console.error('[sse] delivery refresh failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'retoure', () => {
-    const ret = Automat.get('retoure');
-    if (ret?.actions?.reload) {
-      void ret.actions.reload().catch((err) => {
-        console.error('[sse] retoure refresh failed', err);
-      });
-    }
-    const shp = Automat.get('shipment');
-    if (shp?.actions?.reload) {
-      void shp.actions.reload().catch((err) => {
-        console.error('[sse] shipment refresh failed', err);
-      });
-    }
-  });
-
-  addTrackedListener(es, 'open', () => {
-    sseAutomat.setState({ status: 'connected' });
-  });
-
-  addTrackedListener(es, 'message', () => {});
-
-  es.onerror = (e) => {
-    console.error('[sse] event stream error', e);
-    recordEvent(e || { type: 'error', data: '', lastEventId: '' });
-    sseAutomat.setState({ status: 'error' });
-  };
-
-  eventSource = es;
-  attachHandlers(es);
+  if (typeof fetch === 'function' && typeof ReadableStream !== 'undefined') {
+    void startFetchStream(url, companyId);
+  } else {
+    startEventSource(url, companyId);
+  }
 }
 // #endregion
 
@@ -390,7 +442,7 @@ function handleAuthSync(auth) {
     return;
   }
 
-  if (!relogin && eventSource && companyId === sseAutomat.state.companyId) {
+  if (!relogin && (streamAbortController || eventSource) && companyId === sseAutomat.state.companyId) {
     return;
   }
 
@@ -420,14 +472,15 @@ const actions = {
   },
 
   clearEvents() {
-    sseAutomat.setState({ events: [] });
+    sseAutomat.setState({ events: [], lastEvent: null });
   },
 
   /**
-   * Registers a handler for a statically named backend event.
+   * Registers a handler for a named backend event or pattern.
+   * Supports exact event names (e.g. `category`, `articles`), `article-*` wildcard, or `*`.
    *
-   * @param {string} event Event name (e.g. `category`, `articles`).
-   * @param {(event: MessageEvent) => void} handler Signal handler.
+   * @param {string} event Event name or pattern.
+   * @param {Function} handler Signal handler.
    * @returns {() => void} Unsubscribe callback.
    */
   on(event, handler) {
@@ -440,7 +493,9 @@ const actions = {
     if (!entry) {
       entry = { handler, detach: null };
       set.add(entry);
-      if (eventSource) entry.detach = addTrackedListener(eventSource, event, handler);
+      if (eventSource && event !== '*' && event !== 'article-*') {
+        entry.detach = addTrackedListener(eventSource, event, handler);
+      }
     }
     return () => {
       entry.detach?.();
@@ -450,7 +505,17 @@ const actions = {
   },
 
   /**
-   * Subscribes to `article-<sku>` signals for one SKU.
+   * Subscribes to any article mutation event (`article-<sku>`).
+   *
+   * @param {(sku: string, event: object) => void} handler Called with changed SKU.
+   * @returns {() => void} Unsubscribe callback.
+   */
+  onArticle(handler) {
+    return actions.on('article-*', (sku, event) => handler(sku, event));
+  },
+
+  /**
+   * Subscribes to `article-<sku>` signals for one specific SKU.
    *
    * @param {string} sku Article SKU to watch.
    * @param {(sku: string) => void} handler Called with the changed SKU.
@@ -473,6 +538,22 @@ const actions = {
       if (current.size === 0) articleWatchers.delete(key);
     };
   },
+
+  /**
+   * Programmatically dispatches an event through sseAutomat.
+   *
+   * @param {string} type Event type (e.g. 'article-ART-000001', 'articles').
+   * @param {any} [data] Event data payload.
+   * @param {string} [lastEventId] Optional event ID.
+   * @returns {void}
+   */
+  dispatch(type, data = {}, lastEventId = '') {
+    dispatchSseEvent({
+      type,
+      data: typeof data === 'string' ? data : JSON.stringify(data),
+      lastEventId,
+    });
+  },
 };
 
 /**