no redux

2026-09-23 08:16:14 +02:00
parent 49057dc0d6
commit c94ce20b7a
7 changed files with 306 additions and 437 deletions
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -17,7 +17,7 @@
 7. [Developer Workflows & Commands](#7-developer-workflows--commands)
 8. [Critical Agent Rules & Common Pitfalls](#8-critical-agent-rules--common-pitfalls)
 9. [Deep Dive: The Automats (`react-automat`)](#9-deep-dive-the-automats-react-automat)
-10. [Deep Dive: Redux Toolkit Architecture](#10-deep-dive-redux-toolkit-architecture)
+10. [Deep Dive: Configuration Automats (Company, Category, Brand, Unit & POS Terminals)](#10-deep-dive-configuration-automats-company-category-brand-unit--pos-terminals)
 11. [`dashgui` Component Library Integration](#11-dashgui-component-library-integration)
 12. [Application Views & Route Hierarchy](#12-application-views--route-hierarchy)
 13. [Media, Images & Document Pipelines](#13-media-images--document-pipelines)
@@ -49,8 +49,7 @@ flow:
    component: dashfront
    runtime: React 19 (PureComponent & Function Components)
    state_layers:
-      automats: [artikelAutomat, deliveryEditorAutomat, authAutomat, supplierAutomat, navigationAutomat, userSettingsAutomat]
-      redux_slices: [company, category, brand, unit, posterminal]
+      automats: [artikelAutomat, deliveryEditorAutomat, authAutomat, supplierAutomat, navigationAutomat, userSettingsAutomat, companyAutomat, categoryAutomat, brandAutomat, unitAutomat, posterminalAutomat]
    transport: src/api (http(), ApiClient)
    egress:
      protocol: HTTP (fetch with credentials: "include") & SSE (/api/events)
@@ -87,7 +86,7 @@ flow:
 | **Routing** | `react-router-dom` v7 | Configured in [src/appRouter.jsx](file:///home/seb/src/dashfront/src/appRouter.jsx) with HMR router preservation |
 | **UI & Theming** | MUI 9 (`@mui/material`, Emotion) | Custom theme in `src/theme/`, base background `#c5ddd8` in `src/colors.js` |
 | **Shared GUI** | `dashgui` (`file:../dashgui`) | `PanelTile`, `RecordList`, `Tile`, `SingleLineTextEdit`, `ElevatedPill` |
-| **State Management** | `react-automat` + Redux Toolkit | Automats for reactive domain models; Redux for category tree & session bootstrap |
+| **State Management** | `react-automat` | Single state layer for all domain & configuration data (articles, categories, company, brands, units, POS terminals, session) |
 | **Notifications** | `notistack` | `useSnackbar()` / `<SnackbarProvider>` in [src/main.jsx](file:///home/seb/src/dashfront/src/main.jsx) |
 | **Media & Images** | `@jsquash/avif`, `@jsquash/resize`, `thumbhash` | Client-side AVIF encoding and instant thumbnail hash generation |
 | **Documents** | `pdfconvert-wasm` | In-browser PDF processing for supplier delivery invoices & receipts |
@@ -104,9 +103,14 @@ src/
 │   ├── ApiClient.js         # Object-oriented API client (this.article, this.delivery, etc.)
 │   ├── StorageManager.js    # Client-side cache / local storage management
 │   └── storageManagerContext.js # React context provider for StorageManager
-├── automats/                # react-automat stores with fine-grained subscriptions
+├── automats/                # react-automat state modules (fine-grained subscriptions)
 │   ├── artikelAutomat.js    # Article cache, deduplicated loads, and reactive single-article state
-│   ├── authAutomat.js       # Authentication state, company list, company selection
+│   ├── authAutomat.js       # Authentication state, session bootstrap, company selection
+│   ├── companyAutomat.js    # Active company config (tax rates, root category, legal details)
+│   ├── categoryAutomat.js   # Hierarchical category tree, breadcrumbs, and category articles
+│   ├── brandAutomat.js      # Catalog brands / manufacturer list
+│   ├── unitAutomat.js       # Units of measure (Stück, kg, Liter, ...)
+│   ├── posterminalAutomat.js # POS terminal config and enabled categories
 │   ├── deliveryEditorAutomat.js # Multi-line delivery receipt / invoice editor & draft state
 │   ├── navigationAutomat.js # Remembers active paths (last delivery path, last article SKU)
 │   ├── supplierAutomat.js   # Supplier list and supplier-article catalogs
@@ -132,14 +136,6 @@ src/
 │   ├── auftrag/             # Quotes (Angebote) and orders (Bestellungen)
 │   ├── kunde/               # Customer list, new customer, customer groups, edit page
 │   └── infos/               # System and company information page
-├── store/                   # Redux Toolkit store (legacy & tree slice)
-│   ├── index.js             # configureStore with dev logger & listener middleware
-│   ├── authSlice.js         # Redux auth state (session bootstrap, company selection)
-│   ├── companySlice.js      # Redux company details (tax rates, rootCategoryId)
-│   ├── categorySlice.js     # Redux category tree, breadcrumbs, category articles
-│   ├── brandSlice.js        # Redux brand list and lookup
-│   ├── posterminalSlice.js  # Redux POS terminals configuration
-│   └── unitSlice.js         # Redux unit of measure definitions
 ├── theme/                   # MUI theme definitions (light/dark palette, typography, components)
 ├── utils/                   # Helpers (apiShape.js, number formatters, notify.js, etc.)
 ├── appRouter.jsx            # react-router-dom route definitions
@@ -193,10 +189,10 @@ In `dashfront`, two state management solutions coexist harmoniously:
  }
  ```

-### B. Redux Toolkit (`src/store/`)
- Used for static/relational trees: `company`, hierarchical `category` tree, `brand`, `posterminal`, and `unit`.
- Uses `connect(mapStateToProps, mapDispatchToProps)` to connect to `PureComponent` classes or functional hooks where appropriate.
- Coordinated via `createListenerMiddleware`: when `authAutomat` emits an auth change (`auth/sessionEstablished` or `auth/companyChanged`), listeners automatically dispatch loads for company info, brands, POS terminals, and units.
+### B. Configuration Automats (`src/automats/`)
+- Company, hierarchical `category` tree, `brand`, `posterminal`, and `unit` state live in dedicated automats (`companyAutomat`, `categoryAutomat`, `brandAutomat`, `unitAutomat`, `posterminalAutomat`).
+- Reads use the same fine-grained `subscribe`/selector pattern as the domain automats.
+- Cross-automat coordination is done by subscribing to `authAutomat`: when it reaches `authed` with a `selectedCompanyId`, these automats load themselves and reset on `anon` (see [§10](#10-deep-dive-configuration-automats-company-category-brand-unit--pos-terminals)).

 ---

@@ -278,7 +274,7 @@ npm run preview
 5. **Binary / Image Handling**:
   - Image uploads convert source images into AVIF variants client-side.
   - Frontend components use `thumbhash` for instant blur placeholders while loading full images via `/api/image/{fullHash}` or `/api/thumb/{fullHash}`.
-6. **No Hooks in PureComponents**: Never call React hooks (`useState`, `useSelector`, `useEffect`) inside `PureComponent` classes. Automats and `connect()` provide direct reactive subscription without hooks.
+6. **No Hooks in PureComponents**: Never call React hooks (`useState`, `useEffect`) inside `PureComponent` classes. Automats provide direct reactive subscription without hooks.
 7. **Always Unsubscribe**: Every `automat.subscribe(this, ...)` in `componentDidMount()` must have its cleanup callback called in `componentWillUnmount()`.

 ---
@@ -301,7 +297,7 @@ All domain Automats are located in [src/automats/](file:///home/seb/src/dashfron
 ### 2. `authAutomat` ([src/automats/authAutomat.js](file:///home/seb/src/dashfront/src/automats/authAutomat.js))
 - **Role**: Manages user authentication lifecycle and multi-tenant company selection.
 - **State**: `{ user: AuthUser | null, googleClientId: string | null, status: 'loading' | 'anon' | 'authed' }`.
- **Bridge to Redux**: Calls `emit(action)` registered via `setAuthEventDispatcher(store.dispatch)`. Emits:
+- **Consumed by other automats**: The company, category, brand, unit, and posterminal automats `subscribe` to `authAutomat` and (re)load or reset on its state changes. `authAutomat` also emits lifecycle events via the registered `setAuthEventDispatcher`:
  - `auth/sessionEstablished`
  - `auth/companyChanged`
  - `auth/loggedOut`
@@ -326,29 +322,33 @@ All domain Automats are located in [src/automats/](file:///home/seb/src/dashfron

 ---

-## 10. Deep Dive: Redux Toolkit Architecture
+## 10. Deep Dive: Configuration Automats (Company, Category, Brand, Unit & POS Terminals)

-Redux Toolkit manages static, relational, and configuration data in [src/store/](file:///home/seb/src/dashfront/src/store/):
+The remaining static/relational/configuration state is **also** managed by `react-automat`. These automats live alongside the domain automats in [src/automats/](file:///home/seb/src/dashfront/src/automats/) and follow the same subscribe/selector pattern:

-### Slices
-1. **`categorySlice`**: Hierarchical category tree structure, category breadcrumbs, article-category memberships, category reordering (`moveCategory`, `reorderCategories`).
-2. **`companySlice`**: Active company configuration, tax rates (standard, reduced), root category ID, company legal details.
-3. **`brandSlice`**: Catalog brands and manufacturer list.
-4. **`posterminalSlice`**: Registered point-of-sale hardware terminals.
-5. **`unitSlice`**: Allowed units of measure (Stück, kg, Liter, etc.).
+1. **`companyAutomat`** ([src/automats/companyAutomat.js](file:///home/seb/src/dashfront/src/automats/companyAutomat.js)): Active company configuration, tax rates (standard, reduced), root category ID, company legal details. Selectors: `selectCompanyTaxrate()`, `selectCompanyReducedTaxrate()`, `selectCompanyRootCategoryId()`, `selectCompanyName()`, …
+2. **`categoryAutomat`** ([src/automats/categoryAutomat.js](file:///home/seb/src/dashfront/src/automats/categoryAutomat.js)): Hierarchical category tree (id → node map), breadcrumbs, category navigation, article lists per category, and category/article mutations (`createCategory`, `createArticle`, `deleteCategory`, `moveCategory`).
+3. **`brandAutomat`** ([src/automats/brandAutomat.js](file:///home/seb/src/dashfront/src/automats/brandAutomat.js)): Catalog brands / manufacturer list (`load`, `upsert`).
+4. **`posterminalAutomat`** ([src/automats/posterminalAutomat.js](file:///home/seb/src/dashfront/src/automats/posterminalAutomat.js)): Registered point-of-sale hardware terminals and their enabled categories.
+5. **`unitAutomat`** ([src/automats/unitAutomat.js](file:///home/seb/src/dashfront/src/automats/unitAutomat.js)): Allowed units of measure (Stück, kg, Liter, etc.).

-### Automatic Bootstrap with Listener Middleware
-In [src/store/index.js](file:///home/seb/src/dashfront/src/store/index.js), `createListenerMiddleware` coordinates data loading automatically when auth events fire:
+### Automatic Bootstrap via `authAutomat` Subscriptions
+Each of these automats subscribes directly to `authAutomat` at module load and coordinates its own loading:
 ```js
-companyLoadListener(listenerMiddleware);
-unitLoadListener(listenerMiddleware);
-brandLoadListener(listenerMiddleware);
-posterminalLoadListener(listenerMiddleware);
+// e.g. src/automats/companyAutomat.js
+authAutomat.subscribe((auth) => {
+  const companyId = auth.user?.selectedCompanyId;
+  if (auth.status === 'authed' && companyId) {
+    void companyAutomat.actions.load();
+  } else if (auth.status === 'anon') {
+    companyAutomat.actions.reset();
+  }
+});
 ```
-When `auth/sessionEstablished` or `auth/companyChanged` occurs, these listeners trigger thunks to reload company tax settings, brands, units, and POS terminals without boilerplate in React views.
+When the auth state becomes `authed` with a `selectedCompanyId` (on session bootstrap, login, or company switch), the company, brand, unit, and posterminal automats load automatically; on logout/anon they reset. `categoryAutomat.loadTree()` then reads the company's `rootCategoryId` from `companyAutomat`.

-### Redux Dev Logger
-In development mode (`import.meta.env.DEV`), `reduxDevLogger` intercepts actions from `auth/`, `company/`, `category/`, `brand/`, `posterminal/`, and `unit/`, logging structured before/after counts to the browser console.
+### Automatic Debugging
+All automats are observable in the [AutomatInspector](file:///home/seb/src/dashfront/src/devtools/AutomatInspector.jsx), which lists every automat registered in `window.__AUTOMATS__` with live state, subscriber counts, and actions.

 ---

@@ -433,7 +433,7 @@ The frontend connects to the backend Server-Sent Events stream at `/api/events`:
 - **Architecture**: When mutations occur on `dashback` (whether triggered by this client, another terminal, or the POS), SSE events are broadcast with payload information (e.g. `{ type: 'article-update', sku: '1001' }`).
 - **Reactive Cache Refresh**:
  - `artikelAutomat.actions.reloadArticle(sku)` re-fetches the updated article silently, updating subscribers without flicker.
-  - Category updates trigger Redux category slice refreshes.
+  - Category updates trigger `categoryAutomat` tree/article reloads.
  - Delivery and order updates trigger automatic list reloads.

 ---
@@ -527,7 +527,8 @@ async function handleSavePrice(sku, netPrice) {
 ### Recipe 3: Calculating Gross Prices with Company Tax Rates
 ```jsx
 // Prices in the database and API are NET prices.
-// Gross prices shown to end users must apply company tax rates from Redux companySlice:
+// Gross prices shown to end users must apply company tax rates from companyAutomat
+// (selectCompanyTaxrate() / selectCompanyReducedTaxrate()):
 export function calculateGrossPrice(netPrice, taxRatePercent) {
  const net = Number(netPrice) || 0;
  const rate = Number(taxRatePercent) || 0;
--- a/README.redux.md
+++ b/README.redux.md
@@ -1,134 +0,0 @@
-# Redux in Dashfront
-
-Übersicht, wie Redux Toolkit bisher im Frontend eingesetzt wird.
-
-## Stack
-
- **@reduxjs/toolkit** — Store, Slices, Async Thunks, Listener Middleware
- **react-redux** — `Provider` in `src/main.jsx`, Anbindung der UI über `connect()` (kein `useSelector` / `useDispatch`)
-
-Einstieg:
-
-```
-src/main.jsx          → <Provider store={store}>
-src/store/index.js    → configureStore + Middleware
-src/store/*Slice.js   → State, Thunks, Selectors
-```
-
-## Store-Form
-
-Drei Slices unter `src/store/`:
-
-| Key        | Datei               | Verantwortung                                      |
-|------------|---------------------|----------------------------------------------------|
-| `auth`     | `authSlice.js`      | Session, Login/Logout, Firmenwahl / -anlage        |
-| `company`  | `companySlice.js`   | Aktuelles Unternehmen laden / aktualisieren        |
-| `category` | `categorySlice.js`  | Kategoriebaum, Navigation, Artikel je Kategorie    |
-
-```js
-// src/store/index.js
-configureStore({
-  reducer: { auth, company, category },
-  middleware: defaults + listenerMiddleware + (DEV: reduxDevLogger),
-});
-```
-
-## Typische Muster
-
-### Async Thunks als API-Grenze
-
-Seiten- und Dialog-Logik dispatcht Thunks; die Thunks rufen `src/api` auf und schreiben Ergebnisse in den Slice. Komponenten sprechen die API nicht direkt für diese Domänen an.
-
-Beispiele:
-
- `auth/bootstrap`, `auth/login`, `auth/selectCompany`, `auth/createCompany`, `auth/logout`
- `company/loadCurrent`, `company/update`
- `category/loadTree`, `category/loadArticles`, `category/create`, `category/createArticle`, `category/delete`
-
-Fehler in Category-Thunks laufen über `catchBackendError` / `rejectWithValue` und landen als `BackendError` in `state.category.error`. Tree- und Artikel-Responses werden mit `requireObject` / `requireArray` / `requireDefined` aus `apiShape.js` validiert.
-
-### Selectors
-
-Jeder Slice exportiert `select…`-Funktionen. UI-Komponenten mappen sie in `mapStateToProps`:
-
-```js
-const mapStateToProps = (state) => ({
-  status: selectAuthStatus(state),
-  needsCompanySetup: selectNeedsCompanySetup(state),
-});
-export default connect(mapStateToProps)(App);
-```
-
-Abgeleitete Category-Selectors (Breadcrumbs, Kinder, „kann zurück“) lesen die Map `categories` und `currentCategoryId` — keine zweite Kopie des Baums in der UI.
-
-### `connect()` statt Hooks
-
-Die Redux-gebundenen Komponenten sind Class- oder Function-Komponenten mit:
-
-```js
-connect(mapStateToProps, mapDispatchToProps)(Component)
-```
-
-Dispatch-Props wrappen Thunks, oft mit `.unwrap()` in der Komponente für Erfolg/Fehler (Snackbar).
-
-### Listener: Auth → Company
-
-Nach erfolgreichem Bootstrap, Login, Firmenwahl oder Firmenanlage dispatcht ein Listener automatisch `loadCurrentCompany`, wenn `auth.user.selectedCompanyId` gesetzt ist (`companyLoadListener` in `companySlice.js`).
-
-### Cross-Slice-Reset
-
- `logout.fulfilled` leert `company` und setzt `category` auf `initialState`
- `loadCurrentCompany.fulfilled` mit neuer `companyId` setzt den Category-State zurück (Firmenwechsel)
-
-## Datenfluss (Kurz)
-
-```
-App-Start
-  └─ AuthBootstrap → bootstrapSession
-        └─ (listener) loadCurrentCompany  wenn selectedCompanyId
-              └─ Category-UI → loadCategoryTree (braucht company.rootCategoryId)
-
-Login / Firmenwahl / -anlage
-  └─ auth-Thunks → user.selectedCompanyId
-        └─ (listener) loadCurrentCompany → ggf. Category-Reset
-
-Kategorien-Seite
-  └─ navigateToCategory / navigateBack (sync)
-  └─ loadCategoryArticles für Unterkategorien
-  └─ createCategory / createArticle / deleteCategory (optimistisch im Map-/Listen-State)
-```
-
-Status-Felder:
-
-| Slice    | Feld(er)                         | Werte (typisch)        |
-|----------|----------------------------------|------------------------|
-| auth     | `status`                         | `loading` / `anon` / `authed` |
-| company  | `status`                         | `idle` / `loading` / `succeeded` / `failed` |
-| category | `treeStatus`, `articlesStatus`   | `idle` / `loading` / `succeeded` / `failed` |
-
-## Auth-Slice
-
- **State:** `user`, `googleClientId`, `status`
- **Setup-Gate:** `selectNeedsCompanySetup` → eingeloggt, aber keine `selectedCompanyId` → `CompanySetupDialog`
- `mergeUser` behält beim Partial-Update ggf. die bisherige `selectedCompanyId`
-
-## Company-Slice
-
- **State:** `current` (normalisiert über `normalizeCompany`), `status`, `error`
- Thunks lesen `auth.user.selectedCompanyId` aus dem Store (`getState`)
- Selectors liefern u. a. Name, `iso639`, Steuersätze, `rootCategoryId` für Category/UI
-
-## Category-Slice
-
- **Baum:** `categories` als Id→Node-Map, plus `rootCategoryId`, `rootArticles`, `languageId`
- **Navigation:** `currentCategoryId`; Root zeigt `rootArticles`, Unterkategorien laden per `loadCategoryArticles`
- **Sync-Actions:** `navigateToCategory`, `navigateBack`, `resetCategoryState`
- Hilfsfunktionen (`normalizeCategoryNode`, `parseCategoryTreeResponse`, Breadcrumbs, Slugs) leben im Slice und werden u. a. von `categoryRoute.js` für URL-Pfade wiederverwendet
-
-## Dev-Logging
-
-In Development loggt `reduxDevLogger` Actions unter `auth/`, `company/`, `category/` inkl. Payload und kurzem Auth-/Company-Snapshot nach dem Reduce.
-
-## Was (noch) nicht in Redux liegt
-
-Artikel-Detail, Fotos und ähnliche lokale UI-Zustände werden in Komponenten / lokalen Props gehalten, nicht als eigener Slice. Neue Domänen folgen dem bestehenden Muster: API in `src/api`, Thunk + Validierung im Slice, Selectors + `connect` in der UI.
--- a/src/api/StorageManager.js
+++ b/src/api/StorageManager.js
@@ -1,13 +1,12 @@
 import { requireArray, requireDefined, requireObject } from '../utils/apiShape';
 import { notifyError } from '../utils/notify';
-import { parseCategoryTreeResponse } from '../utils/categoryUtils';
 import { ApiClient } from './ApiClient';
 import artikelAutomat from '../automats/artikelAutomat';
 import companyAutomat from '../automats/companyAutomat';
 import brandAutomat from '../automats/brandAutomat';
 import unitAutomat from '../automats/unitAutomat';
 import authAutomat from '../automats/authAutomat';
-import categoryAutomat from '../automats/categoryAutomat';
+import categoryAutomat, { invalidateAllCategoryViews } from '../automats/categoryAutomat';
 import posterminalAutomat from '../automats/posterminalAutomat';


@@ -175,24 +174,10 @@ export class StorageManager extends ApiClient {
  }

  /**
-   * Parsed category map + root id from settled caches, or null if any piece missing.
-   * @returns {{ categories: object, rootCategoryId: unknown } | null}
+   * Parsed category map + root id from categoryAutomat, or null if not yet loaded.
+   * @returns {{ categories: Record<string, object>, rootCategoryId: unknown } | null}
   */
  getCategoryState() {
-    const company = this.company;
-    if (company == null) return null;
-
-    const treeData = this.categoryTree;
-    if (treeData != null) {
-      // Legacy: tree was loaded via the old cache mechanism
-      const parsed = parseCategoryTreeResponse(treeData, company.rootCategoryId);
-      return {
-        categories: parsed.categories,
-        rootCategoryId: parsed.rootCategoryId,
-      };
-    }
-
-    // New path: use categoryAutomat state directly
    const catState = categoryAutomat.state;
    if (catState.categories == null || catState.treeStatus !== 'succeeded') return null;
    return {
@@ -413,12 +398,6 @@ export class StorageManager extends ApiClient {
    );
    const articleIndexCache = this.#articleIndexCache;

-    // category tree: deferred, reloaded via categoryAutomat
-    const categoryTreeCache = this.#createDeferredCache(
-      'GET /category/tree',
-      () => this.#loadCategoryTree(),
-    );
-
    Object.defineProperties(this, {
      authMePromise: { get: () => authMeCache.promise },
      updateAuthMe: { value: authMeCache.update },
@@ -499,11 +478,22 @@ export class StorageManager extends ApiClient {
      // Return a single-element array so .find() still works.
      companies: { get: () => companyAutomat.state.current ? [companyAutomat.state.current] : [] },

-      // ── Category tree bridge ─────────────────────────────────────────────────
-      categoryTreePromise: { get: () => categoryTreeCache.promise },
-      updateCategoryTree: { value: categoryTreeCache.update },
-      /** Settled GET /category/tree body, or undefined. */
-      categoryTree: { get: () => categoryTreeCache.value },
+      // ── Category tree bridge (delegated to categoryAutomat) ──────────────────
+      /** Category tree promise resolving when categoryAutomat tree is loaded. */
+      categoryTreePromise: {
+        get: () => categoryAutomat.state.treeStatus === 'succeeded'
+          ? Promise.resolve(categoryAutomat.state.categories)
+          : new Promise((resolve, reject) => {
+              const unsub = categoryAutomat.subscribe((s) => {
+                if (s.treeStatus === 'succeeded') { unsub(); resolve(s.categories); }
+                else if (s.treeStatus === 'failed') { unsub(); reject(new Error(s.error)); }
+              });
+            }),
+      },
+      /** Reload category tree via categoryAutomat. */
+      updateCategoryTree: { value: () => categoryAutomat.actions.loadTree() },
+      /** Current categories map from categoryAutomat, or null. */
+      categoryTree: { get: () => categoryAutomat.state.categories },

      // ── Deferred caches (auth-gated) ─────────────────────────────────────────
      deliveryPromise: { get: () => deliveryCache.promise },
@@ -556,7 +546,6 @@ export class StorageManager extends ApiClient {
        // Unauthenticated or logged out
        this.#disconnectEvents();
        articleIndexCache.clear();
-        categoryTreeCache.clear();
        deliveryCache.clear();
        customergroupCache.clear();
        entityCache.clear();
@@ -568,7 +557,6 @@ export class StorageManager extends ApiClient {
        // Company established or switched
        if (prevCompanyId) {
          articleIndexCache.clear();
-          categoryTreeCache.clear();
          deliveryCache.clear();
          customergroupCache.clear();
          entityCache.clear();
@@ -678,11 +666,13 @@ export class StorageManager extends ApiClient {
    this.#disconnectEvents();
    const es = new EventSource(this.urlFor('/api/events'), { withCredentials: true });
    es.addEventListener('category', () => {
-      void this.updateCategoryTree().catch((err) => {
-        console.error('[storageMgr] category SSE refresh failed', err);
+      void categoryAutomat.actions.loadTree().catch((err) => {
+        console.error('[storageMgr] category tree SSE refresh failed', err);
      });
+      invalidateAllCategoryViews();
    });
    es.addEventListener('articles', () => {
+      invalidateAllCategoryViews();
      void this.updateArticleIndex().catch((err) => {
        console.error('[storageMgr] articles SSE refresh failed', err);
      });
@@ -753,15 +743,6 @@ export class StorageManager extends ApiClient {
    }));
  }

-  async #loadCategoryTree() {
-    const data = await this.category.tree();
-    requireObject(data, 'GET /api/category/tree');
-    requireArray(data.tree, 'category/tree.tree');
-    requireArray(data.articles, 'category/tree.articles');
-    requireDefined(data.languageId, 'category/tree.languageId');
-    return data;
-  }
-
  async #loadDeliveries() {
    const data = await this.delivery.list();
    requireObject(data, 'GET /api/delivery');
--- a/src/automats/categoryAutomat.js
+++ b/src/automats/categoryAutomat.js
@@ -16,13 +16,8 @@ import {
 * @property {string|null} languageId
 * @property {Record<string,object>|null} categories  id → node map
 * @property {number|string|null} rootCategoryId
- * @property {Array<object>} rootArticles
- * @property {number|string|null} currentCategoryId
- * @property {Array<object>} articles
- * @property {number} articlesTotal
 * @property {boolean} renameMode
 * @property {'idle'|'loading'|'succeeded'|'failed'} treeStatus
- * @property {'idle'|'loading'|'succeeded'|'failed'} articlesStatus
 * @property {string|null} error
 */

@@ -32,25 +27,117 @@ const initialState = {
  languageId: null,
  categories: null,
  rootCategoryId: null,
-  rootArticles: [],
-  currentCategoryId: null,
-  articles: [],
-  articlesTotal: 0,
  renameMode: false,
  treeStatus: 'idle',
-  articlesStatus: 'idle',
  error: null,
 };

 let categoryAutomat;

-// ─── Pure helpers ──────────────────────────────────────────────────────────────
+// Registry of active per-route category view automats
+const categoryViewInstances = new Set();
+// Reverse index for O(1) parentId lookup to target route automat
+const categoryIdToRouteName = new Map();

-function articlesForCategory(state, categoryId) {
-  if (String(categoryId) === String(state.rootCategoryId)) {
-    return state.rootArticles;
+/**
+ * Loader for category view automat: fetches articles for categoryId.
+ * Promise only resolves when all articles are loaded.
+ */
+async function fetchCategoryArticles(automat) {
+  try {
+    const res = await categoryApi.getArticles(automat.state.categoryId);
+    const articles = Array.isArray(res.articles) ? res.articles : [];
+    return { articles, loaded: true, loading: false, error: null };
+  } catch (err) {
+    const errorMsg = err?.message ?? String(err);
+    automat.setState({ loading: false, loaded: false, error: errorMsg });
+    throw err;
  }
-  return [];
+}
+
+/**
+ * Get or create a per-route category view automat for the given slug and categoryId.
+ * Returns null if categoryId is null.
+ *
+ * @param {{ slugPath?: string, categoryId: number|string|null }} param0
+ * @returns {Automat|null}
+ */
+export function getOrCreateCategoryAutomat({ slugPath, categoryId }) {
+  if (categoryId == null) return null;
+
+  const cleanSlug = (slugPath ?? '').replace(/^\/+|\/+$/g, '');
+  const name = cleanSlug === '' ? 'category-view:root' : `category-view:${cleanSlug}`;
+
+  const existing = Automat.get(name);
+  if (existing) {
+    if (String(existing.state?.categoryId) === String(categoryId)) {
+      categoryViewInstances.add(existing);
+      categoryIdToRouteName.set(String(categoryId), name);
+      return existing;
+    }
+    // Stale category ID guard: ID changed, dispose old automat
+    try {
+      existing.dispose();
+    } catch {}
+    categoryViewInstances.delete(existing);
+  }
+
+  const automat = new Automat(
+    {
+      slug: cleanSlug,
+      categoryId,
+      articles: [],
+      loaded: false,
+      loading: true,
+      error: null,
+    },
+    (inst) => ({
+      reload: () => inst.setDirty({ keep: true, now: true }),
+      retry: () => inst.setDirty({ keep: false, now: true }),
+    }),
+    {
+      name,
+      loader: fetchCategoryArticles,
+    }
+  );
+  automat.reload = () => automat.setDirty({ keep: true, now: true });
+  automat.retry = () => automat.setDirty({ keep: false, now: true });
+
+  categoryViewInstances.add(automat);
+  categoryIdToRouteName.set(String(categoryId), name);
+  return automat;
+}
+
+/**
+ * Invalidate all active category view automats by triggering background reload.
+ */
+export function invalidateAllCategoryViews() {
+  for (const automat of categoryViewInstances) {
+    if (typeof automat.reload === 'function') {
+      automat.reload().catch((err) => {
+        console.error('[categoryAutomat] reload view failed', err);
+      });
+    } else if (typeof automat.actions?.reload === 'function') {
+      automat.actions.reload().catch((err) => {
+        console.error('[categoryAutomat] reload view failed', err);
+      });
+    }
+  }
+}
+
+/**
+ * Dispose all category view automats and clear registries (e.g. on logout or company switch).
+ */
+export function disposeAllCategoryViewAutomats() {
+  for (const automat of categoryViewInstances) {
+    try {
+      automat.dispose();
+    } catch (e) {
+      console.error('[categoryAutomat] dispose view failed', e);
+    }
+  }
+  categoryViewInstances.clear();
+  categoryIdToRouteName.clear();
 }

 // ─── Actions ───────────────────────────────────────────────────────────────────
@@ -73,11 +160,6 @@ const actions = {
        languageId: parsed.languageId,
        categories: parsed.categories,
        rootCategoryId: parsed.rootCategoryId,
-        currentCategoryId: parsed.rootCategoryId,
-        rootArticles: parsed.rootArticles,
-        articles: parsed.rootArticles,
-        articlesTotal: parsed.rootArticles.length,
-        articlesStatus: 'succeeded',
        error: null,
      });
    } catch (err) {
@@ -89,62 +171,6 @@ const actions = {
    }
  },

-  /**
-   * Load articles for a non-root category.
-   * @param {number|string} categoryId
-   */
-  async loadArticles(categoryId) {
-    categoryAutomat.setState({ articlesStatus: 'loading', error: null });
-    try {
-      const res = await categoryApi.getArticles(categoryId);
-      const articles = Array.isArray(res.articles) ? res.articles : [];
-      categoryAutomat.setState({
-        articlesStatus: 'succeeded',
-        articles,
-        articlesTotal: articles.length,
-      });
-    } catch (err) {
-      categoryAutomat.setState({
-        articlesStatus: 'failed',
-        articles: [],
-        articlesTotal: 0,
-        error: err?.message ?? String(err),
-      });
-      throw err;
-    }
-  },
-
-  /** Navigate to a category by id. */
-  navigateTo(categoryId) {
-    const { rootCategoryId, rootArticles } = categoryAutomat.state;
-    const isRoot = String(categoryId) === String(rootCategoryId);
-    categoryAutomat.setState({
-      currentCategoryId: categoryId,
-      error: null,
-      articles: isRoot ? rootArticles : [],
-      articlesTotal: isRoot ? rootArticles.length : 0,
-      articlesStatus: isRoot ? 'succeeded' : 'idle',
-    });
-  },
-
-  /** Navigate up to the parent category. */
-  navigateBack() {
-    const { categories, currentCategoryId, rootCategoryId, rootArticles } = categoryAutomat.state;
-    const current = categories?.[String(currentCategoryId)];
-    const parentId = current?.parentId;
-    if (parentId == null || parentId === 0) return;
-    if (String(parentId) === String(rootCategoryId) || categories?.[String(parentId)]) {
-      const isRoot = String(parentId) === String(rootCategoryId);
-      categoryAutomat.setState({
-        currentCategoryId: parentId,
-        error: null,
-        articles: isRoot ? rootArticles : [],
-        articlesTotal: isRoot ? rootArticles.length : 0,
-        articlesStatus: isRoot ? 'succeeded' : 'idle',
-      });
-    }
-  },
-
  /** Toggle rename/edit mode for the category grid. */
  setRenameMode(enabled) {
    categoryAutomat.setState({ renameMode: Boolean(enabled) });
@@ -192,17 +218,17 @@ const actions = {
  async createArticle({ parentId, name }) {
    const res = await articleApi.create({ parentId, name });
    const created = res.article;
-    const { currentCategoryId, rootCategoryId, articles, rootArticles } = categoryAutomat.state;
-    const patch = {};
-    if (String(created.parentId) === String(currentCategoryId)) {
-      patch.articles = [...articles, created];
-      patch.articlesTotal = patch.articles.length;
-      patch.articlesStatus = 'succeeded';
+    if (created && parentId != null) {
+      const routeName = categoryIdToRouteName.get(String(parentId));
+      if (routeName) {
+        const routeAutomat = Automat.get(routeName);
+        if (routeAutomat && Array.isArray(routeAutomat.state?.articles)) {
+          routeAutomat.setState({
+            articles: [...routeAutomat.state.articles, created],
+          });
+        }
+      }
    }
-    if (String(created.parentId) === String(rootCategoryId)) {
-      patch.rootArticles = [...rootArticles, created];
-    }
-    if (Object.keys(patch).length) categoryAutomat.setState(patch);
    return created;
  },

@@ -218,19 +244,17 @@ const actions = {
      const res = await articleApi.create({ parentId, name });
      if (res.article) created.push(res.article);
    }
-    const { currentCategoryId, rootCategoryId, articles, rootArticles } = categoryAutomat.state;
-    const patch = {};
-    const forCurrent = created.filter((a) => String(a.parentId) === String(currentCategoryId));
-    if (forCurrent.length > 0) {
-      patch.articles = [...articles, ...forCurrent];
-      patch.articlesTotal = patch.articles.length;
-      patch.articlesStatus = 'succeeded';
+    if (created.length > 0 && parentId != null) {
+      const routeName = categoryIdToRouteName.get(String(parentId));
+      if (routeName) {
+        const routeAutomat = Automat.get(routeName);
+        if (routeAutomat && Array.isArray(routeAutomat.state?.articles)) {
+          routeAutomat.setState({
+            articles: [...routeAutomat.state.articles, ...created],
+          });
+        }
+      }
    }
-    const forRoot = created.filter((a) => String(a.parentId) === String(rootCategoryId));
-    if (forRoot.length > 0) {
-      patch.rootArticles = [...rootArticles, ...forRoot];
-    }
-    if (Object.keys(patch).length) categoryAutomat.setState(patch);
    return created;
  },

@@ -247,14 +271,9 @@ const actions = {
    const res = await categoryApi.updateName(categoryId, trimmed);
    const updated = normalizeCategoryNode(res.category);
    const key = String(updated.id);
-    const { categories, rootArticles } = categoryAutomat.state;
+    const { categories } = categoryAutomat.state;
    categoryAutomat.setState({
      categories: categories ? { ...categories, [key]: { ...categories[key], ...updated } } : null,
-      rootArticles: rootArticles.map((row) =>
-        row?.categoryId != null && String(row.categoryId) === key
-          ? { ...row, name: updated.name }
-          : row,
-      ),
    });
    return updated;
  },
@@ -264,7 +283,7 @@ const actions = {
   * @param {{ parentId?: number|string, categoryIds: number[] }} param0
   */
  async reorderCategories({ parentId, categoryIds }) {
-    const targetParentId = parentId != null ? parentId : categoryAutomat.state.currentCategoryId;
+    const targetParentId = parentId != null ? parentId : categoryAutomat.state.rootCategoryId;
    const res = await categoryApi.reorder(targetParentId, categoryIds);
    const ordered = res.categoryIds;
    const parentKey = String(targetParentId);
@@ -304,18 +323,11 @@ const actions = {
   */
  async deleteCategory(categoryId) {
    await categoryApi.delete(categoryId);
-    const { categories, currentCategoryId, rootCategoryId, rootArticles } = categoryAutomat.state;
+    const { categories } = categoryAutomat.state;
    if (!categories) return;
    const next = { ...categories };
    delete next[String(categoryId)];
-    const patch = { categories: next };
-    if (String(currentCategoryId) === String(categoryId)) {
-      patch.currentCategoryId = rootCategoryId;
-      patch.articles = rootArticles;
-      patch.articlesTotal = rootArticles.length;
-      patch.articlesStatus = 'succeeded';
-    }
-    categoryAutomat.setState(patch);
+    categoryAutomat.setState({ categories: next });
    return categoryId;
  },

@@ -372,55 +384,17 @@ const actions = {

  // ─── Local state patches ───────────────────────────────────────────────────

-  /** Remove an article from both article lists (used after article deletion). */
+  /** Remove an article from all live category view lists (used after article deletion). */
  removeArticleBySku(sku) {
-    categoryAutomat.setState({
-      articles: categoryAutomat.state.articles.filter((r) => r.sku !== sku),
-      articlesTotal: categoryAutomat.state.articles.filter((r) => r.sku !== sku).length,
-      rootArticles: categoryAutomat.state.rootArticles.filter((r) => r.sku !== sku),
-    });
-  },
-
-  /**
-   * Patch article fields and category membership in local lists.
-   * @param {{ sku: string, categoryIds?: number[], [key: string]: any }} payload
-   */
-  patchArticleInLists({ sku, categoryIds, ...fields }) {
-    if (sku == null) return;
-    const { articles, rootArticles, rootCategoryId, currentCategoryId } = categoryAutomat.state;
-
-    const patchList = (list) =>
-      list.map((row) => (row.sku !== sku ? row : { ...row, ...fields }));
-
-    let nextArticles = patchList(articles);
-    let nextRoot = patchList(rootArticles);
-    let nextArticlesTotal = nextArticles.length;
-
-    if (categoryIds !== undefined) {
-      const newIds = categoryIds ?? [];
-      const articleObj = nextArticles.find((r) => r.sku === sku) ?? nextRoot.find((r) => r.sku === sku);
-
-      if (rootCategoryId != null) {
-        const inRoot = newIds.some((id) => String(id) === String(rootCategoryId));
-        const wasInRoot = nextRoot.some((r) => r.sku === sku);
-        if (!inRoot) nextRoot = nextRoot.filter((r) => r.sku !== sku);
-        else if (!wasInRoot && articleObj) nextRoot = [...nextRoot, articleObj];
-      }
-
-      if (currentCategoryId != null) {
-        const inCurrent = newIds.some((id) => String(id) === String(currentCategoryId));
-        const wasInCurrent = nextArticles.some((r) => r.sku === sku);
-        if (!inCurrent) { nextArticles = nextArticles.filter((r) => r.sku !== sku); }
-        else if (!wasInCurrent && articleObj) { nextArticles = [...nextArticles, articleObj]; }
-        nextArticlesTotal = nextArticles.length;
+    if (!sku) return;
+    for (const automat of categoryViewInstances) {
+      const articles = automat.state?.articles;
+      if (Array.isArray(articles) && articles.some((r) => r.sku === sku)) {
+        automat.setState({
+          articles: articles.filter((r) => r.sku !== sku),
+        });
      }
    }
-
-    categoryAutomat.setState({
-      articles: nextArticles,
-      articlesTotal: nextArticlesTotal,
-      rootArticles: nextRoot,
-    });
  },

  /**
@@ -445,6 +419,7 @@ const actions = {

  /** Reset state to idle (logout / company switch). */
  reset() {
+    disposeAllCategoryViewAutomats();
    categoryAutomat.setState(initialState);
  },
 };
@@ -464,6 +439,7 @@ companyAutomat.subscribe((company) => {
  const rootCategoryId = company.current?.rootCategoryId ?? null;
  if (id && rootCategoryId && id !== _lastCompanyId) {
    _lastCompanyId = id;
+    disposeAllCategoryViewAutomats();
    void categoryAutomat.actions.loadTree();
  }
  if (!id && _lastCompanyId) {
--- a/src/automats/index.js
+++ b/src/automats/index.js
@@ -51,4 +51,8 @@ export {
  categoryDisplayName,
  categorySlug,
  normalizeCategoryMap,
+  getOrCreateCategoryAutomat,
+  disposeAllCategoryViewAutomats,
+  invalidateAllCategoryViews,
 } from './categoryAutomat';
+
--- a/src/pages/artikel/kategorien.jsx
+++ b/src/pages/artikel/kategorien.jsx
@@ -24,7 +24,7 @@ import {
  resolveCategoryIdFromSlugPath,
  ROOT_CATEGORY_NAME,
 } from './categoryRoute';
-import categoryAutomat from '../../automats/categoryAutomat';
+import categoryAutomat, { getOrCreateCategoryAutomat } from '../../automats/categoryAutomat';
 import posterminalAutomat from '../../automats/posterminalAutomat';
 import companyAutomat from '../../automats/companyAutomat';
 import { setLastArticleSku } from '../../automats';
@@ -37,29 +37,13 @@ import {

 // ─── Helper selectors for this page ────────────────────────────────────────────
 function selectFromCategory(s) {
-  const { categories, rootCategoryId, currentCategoryId, articles, articlesTotal, renameMode, treeStatus, articlesStatus, error } = s;
-  const breadcrumbs = getCategoryBreadcrumbs(categories, currentCategoryId, rootCategoryId);
-  const childCategories = getCategoryChildren(categories, currentCategoryId);
-  const canGoBack =
-    currentCategoryId != null &&
-    rootCategoryId != null &&
-    String(currentCategoryId) !== String(rootCategoryId) &&
-    categories?.[String(currentCategoryId)]?.parentId != null &&
-    categories[String(currentCategoryId)].parentId !== 0;
-
+  const { categories, rootCategoryId, renameMode, treeStatus, error } = s;
  return {
    categories,
    rootCategoryId,
-    treeStatus,
-    articlesStatus,
-    error,
-    currentCategoryId,
-    breadcrumbs,
-    childCategories,
-    articles,
-    articlesTotal,
-    canGoBack,
    renameMode,
+    treeStatus,
+    error,
  };
 }

@@ -76,9 +60,30 @@ const gridSx = {
 class ArtikelKategorienPage extends PureComponent {
  constructor(props) {
    super(props);
+    const catState = selectFromCategory(categoryAutomat.state);
+    const { categories, rootCategoryId, treeStatus } = catState;
+
+    let resolvedCategoryId = null;
+    if (treeStatus === 'succeeded' && categories && rootCategoryId != null) {
+      resolvedCategoryId = resolveCategoryIdFromSlugPath(
+        categories,
+        rootCategoryId,
+        props.categorySlugPath,
+      );
+    }
+
+    this.routeAutomat = resolvedCategoryId != null
+      ? getOrCreateCategoryAutomat({ slugPath: props.categorySlugPath, categoryId: resolvedCategoryId })
+      : null;
+
    this.state = {
      drafts: {},
-      ...selectFromCategory(categoryAutomat.state),
+      ...catState,
+      resolvedCategoryId,
+      articles: this.routeAutomat?.state?.articles ?? [],
+      loaded: this.routeAutomat?.state?.loaded ?? false,
+      loading: this.routeAutomat?.state?.loading ?? false,
+      routeError: this.routeAutomat?.state?.error ?? null,
      ...selectTerminals(posterminalAutomat.state),
      companyId: companyAutomat.state.current?.id ?? null,
      moveCategory: null,
@@ -99,31 +104,28 @@ class ArtikelKategorienPage extends PureComponent {
    this.ensureTreeLoaded();
    this.ensurePosterminalsLoaded();
    this.syncCategoryFromUrl();
-    this.ensureArticlesLoaded();
+    this.subscribeRouteAutomat();
    this.syncSortable();
  }

-  componentDidUpdate(prevState) {
-    // Note: PureComponent — comparisons use this.state not this.props
+  componentDidUpdate(prevProps, prevState) {
    if (this.state.companyId !== prevState.companyId) {
      this.ensureTreeLoaded();
    }
    if (this.state.treeStatus === 'succeeded' && prevState.treeStatus !== 'succeeded') {
      this.syncCategoryFromUrl();
-      this.ensureArticlesLoaded();
    }
    if (
-      this.state.treeStatus === 'succeeded' &&
-      this.props.categorySlugPath !== (this._prevSlugPath ?? this.props.categorySlugPath)
+      this.props.categorySlugPath !== prevProps.categorySlugPath ||
+      this.state.categories !== prevState.categories ||
+      this.state.rootCategoryId !== prevState.rootCategoryId
    ) {
      this.syncCategoryFromUrl();
    }
-    this._prevSlugPath = this.props.categorySlugPath;
-
-    if (this.state.currentCategoryId !== prevState.currentCategoryId) {
-      this.ensureArticlesLoaded();
-    }
-    if (this.state.renameMode !== prevState.renameMode) {
+    if (
+      this.state.renameMode !== prevState.renameMode ||
+      (this.state.renameMode && this.state.resolvedCategoryId !== prevState.resolvedCategoryId)
+    ) {
      this.syncSortable();
    }
  }
@@ -132,16 +134,33 @@ class ArtikelKategorienPage extends PureComponent {
    this._unsubCat?.();
    this._unsubTerm?.();
    this._unsubCompany?.();
+    this._unsubRoute?.();
    this.sortableModule?.destroy();
  }

+  subscribeRouteAutomat() {
+    this._unsubRoute?.();
+    this._unsubRoute = null;
+    if (this.routeAutomat) {
+      this._unsubRoute = this.routeAutomat.subscribe(this, (s) => ({
+        articles: s.articles,
+        loaded: s.loaded,
+        loading: s.loading,
+        routeError: s.error,
+      }));
+    }
+  }
+
  #ensureModules = () => {
    const el = this.gridRef.current;
    if (!el) return;
    if (!this.sortableModule) {
      this.sortableModule = new CategorySortable(el, {
        onReorder: ({ categoryIds }) =>
-          categoryAutomat.actions.reorderCategories({ categoryIds }),
+          categoryAutomat.actions.reorderCategories({
+            parentId: this.state.resolvedCategoryId,
+            categoryIds,
+          }),
      });
    }
  };
@@ -168,19 +187,12 @@ class ArtikelKategorienPage extends PureComponent {
    void posterminalAutomat.actions.load();
  };

-  ensureArticlesLoaded = () => {
-    const { currentCategoryId, articlesStatus, rootCategoryId, treeStatus } = this.state;
-    if (treeStatus !== 'succeeded' || !currentCategoryId || articlesStatus !== 'idle') return;
-    if (String(currentCategoryId) === String(rootCategoryId)) return;
-    void categoryAutomat.actions.loadArticles(currentCategoryId);
-  };
-
  syncCategoryFromUrl = () => {
    const {
      categories,
      rootCategoryId,
-      currentCategoryId,
      treeStatus,
+      resolvedCategoryId,
    } = this.state;
    const { categorySlugPath, navigate } = this.props;

@@ -204,8 +216,23 @@ class ArtikelKategorienPage extends PureComponent {
      navigate(buildCategoryPath(categories, rootCategoryId, resolvedId), { replace: true });
    }

-    if (resolvedId !== currentCategoryId) {
-      categoryAutomat.actions.navigateTo(resolvedId);
+    const cleanSlug = (categorySlugPath ?? '').replace(/^\/+|\/+$/g, '');
+    const currentRouteSlug = this.routeAutomat?.state?.slug;
+
+    if (resolvedId !== resolvedCategoryId || cleanSlug !== currentRouteSlug || !this.routeAutomat) {
+      this._unsubRoute?.();
+      this.routeAutomat = getOrCreateCategoryAutomat({
+        slugPath: categorySlugPath,
+        categoryId: resolvedId,
+      });
+      this.setState({
+        resolvedCategoryId: resolvedId,
+        articles: this.routeAutomat?.state?.articles ?? [],
+        loaded: this.routeAutomat?.state?.loaded ?? false,
+        loading: this.routeAutomat?.state?.loading ?? false,
+        routeError: this.routeAutomat?.state?.error ?? null,
+      });
+      this.subscribeRouteAutomat();
    }
  };

@@ -266,14 +293,20 @@ class ArtikelKategorienPage extends PureComponent {
  };

  handleRetryArticles = () => {
-    const { currentCategoryId } = this.state;
-    if (currentCategoryId) {
-      void categoryAutomat.actions.loadArticles(currentCategoryId);
+    if (this.routeAutomat) {
+      if (typeof this.routeAutomat.retry === 'function') {
+        void this.routeAutomat.retry();
+      } else if (typeof this.routeAutomat.actions?.retry === 'function') {
+        void this.routeAutomat.actions.retry();
+      } else {
+        void this.routeAutomat.setDirty({ keep: false, now: true });
+      }
    }
  };

  handleNavigateBack = () => {
-    const { breadcrumbs } = this.state;
+    const { categories, resolvedCategoryId, rootCategoryId } = this.state;
+    const breadcrumbs = getCategoryBreadcrumbs(categories, resolvedCategoryId, rootCategoryId);
    if (breadcrumbs.length < 2) return;
    this.navigateToCategoryById(breadcrumbs[breadcrumbs.length - 2].id);
  };
@@ -289,13 +322,12 @@ class ArtikelKategorienPage extends PureComponent {
      categories,
      rootCategoryId,
      treeStatus,
-      articlesStatus,
      error,
-      canGoBack,
-      breadcrumbs,
-      currentCategoryId,
-      childCategories,
+      resolvedCategoryId,
      articles,
+      loaded,
+      loading,
+      routeError,
      renameMode,
      terminals,
      drafts,
@@ -335,7 +367,16 @@ class ArtikelKategorienPage extends PureComponent {
      );
    }

-    const showArticlesLoading = articlesStatus === 'loading';
+    const breadcrumbs = getCategoryBreadcrumbs(categories, resolvedCategoryId, rootCategoryId);
+    const childCategories = getCategoryChildren(categories, resolvedCategoryId);
+    const canGoBack =
+      resolvedCategoryId != null &&
+      rootCategoryId != null &&
+      String(resolvedCategoryId) !== String(rootCategoryId) &&
+      categories?.[String(resolvedCategoryId)]?.parentId != null &&
+      categories[String(resolvedCategoryId)].parentId !== 0;
+
+    const showArticlesLoading = loading;

    return (
      <>
@@ -344,9 +385,9 @@ class ArtikelKategorienPage extends PureComponent {
          onNavigate={this.navigateToCategoryById}
        />

-        {error && articlesStatus === 'failed' && (
+        {routeError && (
          <BackendError
-            error={error}
+            error={routeError}
            sx={{ mb: 2 }}
            onRetry={this.handleRetryArticles}
          />
@@ -356,12 +397,12 @@ class ArtikelKategorienPage extends PureComponent {
          {canGoBack && (
            <BackTile
              onClick={this.handleNavigateBack}
-              data-id={String(breadcrumbs[breadcrumbs.length - 2].id)}
+              data-id={breadcrumbs.length >= 2 ? String(breadcrumbs[breadcrumbs.length - 2].id) : undefined}
              className="sortable-item not-sortable"
            />
          )}

-          {childCategories.map((item, index) => {
+          {childCategories.map((item) => {
            const label = categoryDisplayName(item.name, item.id, rootCategoryId);
            const draftName =
              drafts[item.id] !== undefined
@@ -469,10 +510,10 @@ class ArtikelKategorienPage extends PureComponent {
            />
          ))}

-          {renameMode && <NewCategoryTile parentId={currentCategoryId} />}
-          {renameMode && articlesStatus === 'succeeded' && (
+          {renameMode && <NewCategoryTile parentId={resolvedCategoryId} />}
+          {renameMode && loaded && (
            <NewArticleTile
-              parentId={currentCategoryId}
+              parentId={resolvedCategoryId}
              onOpenArticle={this.handleArticleClick}
              sx={{ gridColumnStart: 1 }}
            />
@@ -505,3 +546,4 @@ class ArtikelKategorienPage extends PureComponent {
 }

 export default withCategoryRoute(ArtikelKategorienPage);
+
--- a/src/utils/categoryUtils.js
+++ b/src/utils/categoryUtils.js
@@ -35,7 +35,6 @@ export function parseCategoryTreeResponse(data, companyRootCategoryId) {
  return {
    rootCategoryId,
    categories,
-    rootArticles: Array.isArray(data.articles) ? data.articles : [],
    languageId: data.languageId,
  };
 }