u

API.article.md

@@ -181,6 +181,8 @@ Returns the change history of an article by its SKU.
 | --- | --- | --- |
 | `googleAuthId` | `number` | The id of the Google auth user. |
 | `sku` | `string` | The article SKU. |
+| `[opts]` | `object` | Optional options. |
+| `[opts.limit]` | `number` | Maximum number of entries to return (newest first). |
 | `[tx]` | `object` | Optional transaction. |
 
 **Returns**
@@ -192,6 +194,9 @@ Returns the change history of an article by its SKU.
 ```js
 const history = await store.article.getHistoryBySku(42, 'SKU-1');
 // => [{ id, companyuserId, date, text }]
+
+const recent = await store.article.getHistoryBySku(42, 'SKU-1', { limit: 5 });
+// => up to 5 most recent entries
 ```
 
 ## `article.importRows`
@@ -362,6 +367,27 @@ Removes a child article from a father article, either by unlinking or deleting i
 
 `Promise<{success: boolean, fatherSku: string, childSku: string, deleted: boolean}>`
 
+## `article.resolveUniqueSlug`
+
+*Source: `src/store/article/resolveUniqueSlug.js`*
+
+Resolves a company- and language-unique slug for an article. Disambiguates duplicate slugs with a numeric suffix (-2, -3, ...).
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `runner` | `object` | DB runner or tx. |
+| `params` | `object` |  |
+| `params.companyId` | `number` | The company ID. |
+| `params.languageId` | `number` | The language ID. |
+| `params.name` | `string` | The article name. |
+| `[params.excludeArticleId]` | `number` | Optional article ID to exclude (e.g. for updates). |
+
+**Returns**
+
+`Promise<string>` — The unique slug.
+
 ## `article.setBrandIdBySku`
 
 *Source: `src/store/article/setBrandIdBySku.js`*

API.categoryattributevalue.md

@@ -0,0 +1,40 @@
+# categoryattributevalue
+
+This document is auto-generated from the JSDoc comments in `src/store` by running `npm run api-doc`.
+
+## `categoryattributevalue.listByCategoryId`
+
+*Source: `src/store/categoryattributevalue/listByCategoryId.js`*
+
+Lists the attribute values assigned to a category by its ID.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `categoryId` | `number` | The category ID. |
+| `[tx]` | `object` | Optional transaction. |
+
+**Returns**
+
+`Promise<Array<{id: number, categoryId: number, attributeId: number, attributeName: string, exclusive: boolean, attributeValueId: number, value: string, sort: number}>>`
+
+## `categoryattributevalue.setByCategoryId`
+
+*Source: `src/store/categoryattributevalue/setByCategoryId.js`*
+
+Replaces all attribute values for a category by its ID. Validates company ownership and enforces the `exclusive` flag on attributes.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `categoryId` | `number` | The category ID. |
+| `values` | `Array<number|{attributeValueId: number, sort?: number}>` | Attribute value IDs or items. |
+| `[tx]` | `object` | Optional transaction. |
+
+**Returns**
+
+`Promise<Array<{id: number, categoryId: number, attributeId: number, attributeName: string, exclusive: boolean, attributeValueId: number, value: string, sort: number}>>`

API.categoryproperty.md

@@ -0,0 +1,59 @@
+# categoryproperty
+
+This document is auto-generated from the JSDoc comments in `src/store` by running `npm run api-doc`.
+
+## `categoryproperty.delete`
+
+*Source: `src/store/categoryproperty/delete.js`*
+
+Deletes a property from a category by categoryId and propertyId.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `categoryId` | `number` | The category ID. |
+| `propertyId` | `number` | The property id. |
+| `[tx]` | `object` | Optional transaction. |
+
+**Returns**
+
+`Promise<void>`
+
+## `categoryproperty.listByCategoryId`
+
+*Source: `src/store/categoryproperty/listByCategoryId.js`*
+
+Lists the properties of a category by its ID.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `categoryId` | `number` | The category ID. |
+| `[tx]` | `object` | Optional transaction. |
+
+**Returns**
+
+`Promise<Array<{id: number, categoryId: number, propertyId: number, name: string, exclusive: boolean, value: string, sort: number}>>`
+
+## `categoryproperty.setByCategoryId`
+
+*Source: `src/store/categoryproperty/setByCategoryId.js`*
+
+Replaces all properties for a category by its ID. Enforces exclusive flag on property names.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `categoryId` | `number` | The category ID. |
+| `properties` | `Array<{propertyId: number, value: string, sort?: number}>` | The properties to set. |
+| `[tx]` | `object` | Optional transaction. |
+
+**Returns**
+
+`Promise<Array<{id: number, categoryId: number, propertyId: number, name: string, exclusive: boolean, value: string, sort: number}>>`

API.md

@@ -89,13 +89,14 @@ The store is exposed as a `LibDashStore` instance (see `src/index.js`). Each met
   - `delete(googleAuthId: number, sku: string, optionsOrTx?: object|*, maybeTx?: object): Promise<void>`
   - `deleteImage(googleAuthId: number, sku: string, fullHash: string, tx?: object): Promise<void>`
   - `getBySku(googleAuthId: number, sku: string, tx?: object): Promise<{article: {id: number, sku: string, name: string, slug: string, unitamount: number|null, weight: number|null, track_stock: boolean, unit: {si: string|null, basesi: string|null, basesifactor: number|null, symbol: string|null, name: string|null}, brand: {id: number|null, name: string, fullHash: string|null, thumbW: number|null, thumbH: number|null, thumbHash: string|null}|null, categoryIds: number[], photos: Array<{sort: number, fullHash: string, fullW: number, fullH: number, fullSize: number, thumbW: number, thumbH: number, thumbHash: string}>, eans: string[], prices: Array<{minmultiplier: number, net: number, taxRate: number, customergroupId: number}>, suppliers: Array<{id: number, articleId: number, entityId: number, supplierName: string|null, sku: string|null, pu: number, stock: number|null, sort: number, priceId: number|null, price: {net: number, taxId: number, taxRate?: number}|null}>, optionsCount: number, articleListCount: number, childCount: number, fatherArticleId: number|null, fatherSku: string|null}}>`
-  - `getHistoryBySku(googleAuthId: number, sku: string, tx?: object): Promise<Array<{id: number, companyuserId: number|null, date: string, text: string}>>`
+  - `getHistoryBySku(googleAuthId: number, sku: string, opts?: {limit?: number}, tx?: object): Promise<Array<{id: number, companyuserId: number|null, date: string, text: string}>>`
   - `importRows(input: {googleAuthId: number, rows: Array<object>}, tx?: object): Promise<{imported: Array<object>, skipped: Array<object>, errors: Array<object>}>`
   - `listChildren(googleAuthId: number, fatherSku: string, tx?: object): Promise<Array<{id: number, sku: string, fathersort: number, trackStock: boolean, unitamount: number, weight: number, name: string|null, slug: string|null, attributeValueId: number|null, attributeValue: string|null}>>`
   - `listExport(googleAuthId: number, categoryId?: number|null, tx?: object): Promise<Array<object>>`
   - `listSearchIndex(googleAuthId: number, tx?: object): Promise<Array<{id: number, sku: string, name: string, eans: Array<string>, categoryIds: Array<number>}>>`
   - `orderImages(googleAuthId: number, sku: string, input: {fullHashes: Array<string>}, tx?: object): Promise<{fullHashes: Array<string>}>`
   - `removeChild(googleAuthId: number, fatherSku: string, childSku: string, options?: {deleteArticle?: boolean, cascade?: boolean}, tx?: object): Promise<{success: boolean, fatherSku: string, childSku: string, deleted: boolean}>`
+  - `resolveUniqueSlug(runner: object, params: {companyId: number, languageId: number, name: string, excludeArticleId?: number}): Promise<string>`
   - `setBrandIdBySku(googleAuthId: number, sku: string, brandId: number|null, tx?: object): Promise<object>`
   - `setCategoryIdsBySku(googleAuthId: number, sku: string, categoryIds: Array<number>, tx?: object): Promise<object>`
   - `setEansBySku(googleAuthId: number, sku: string, eans: Array<string>, tx?: object): Promise<object>`
@@ -212,6 +213,7 @@ The store is exposed as a `LibDashStore` instance (see `src/index.js`). Each met
   - `getProductList(input: {posterminalId: number, cursor?: number, limit?: number}, tx?: object): Promise<Array<object>>`
   - `list(googleAuthId: number, tx?: object): Promise<Array<{id: number, name: string, token: string, pairingpin: string}>>`
   - `pair(id: number, input: {token: string, clientserial?: string, pairedAt?: string}, tx?: object): Promise<{id: number, token: string, clientserial: string|null, pairedAt: string|null}>`
+  - `setMaxKnownTombstoneId(id: number, maxknowntombstoneid: number|null, tx?: object): Promise<{id: number, maxknowntombstoneid: number|null}>`
   - `setOff(googleAuthId: number, posterminalId: number, categoryId: number, tx?: object): Promise<{id: number, categoryIds: Array<number>}>`
   - `setOffAll(googleAuthId: number, posterminalId: number, tx?: object): Promise<{id: number, categoryIds: Array<number>}>`
   - `setOn(googleAuthId: number, posterminalId: number, categoryId: number, tx?: object): Promise<{id: number, categoryIds: Array<number>}>`
@@ -272,6 +274,13 @@ The store is exposed as a `LibDashStore` instance (see `src/index.js`). Each met
 - [articlelist](API.articlelist.md)
   - `getItemsByArticleSku(googleAuthId: number, sku: string, tx?: object): Promise<Array<{id: number, articleId: number, sku: string, name: string|null, count: number, sort: number}>>`
   - `setItemsByArticleSku(googleAuthId: number, sku: string, items?: Array<{articleId?: number, sku?: string, count?: number, sort?: number}>, tx?: object): Promise<Array<{id: number, articleId: number, sku: string, name: string|null, count: number, sort: number}>>`
+- [categoryattributevalue](API.categoryattributevalue.md)
+  - `listByCategoryId(googleAuthId: number, categoryId: number, tx?: object): Promise<Array<{id: number, categoryId: number, attributeId: number, attributeName: string, exclusive: boolean, attributeValueId: number, value: string, sort: number}>>`
+  - `setByCategoryId(googleAuthId: number, categoryId: number, values: Array<number|{attributeValueId: number, sort?: number}>, tx?: object): Promise<Array<{id: number, categoryId: number, attributeId: number, attributeName: string, exclusive: boolean, attributeValueId: number, value: string, sort: number}>>`
+- [categoryproperty](API.categoryproperty.md)
+  - `delete(googleAuthId: number, categoryId: number, propertyId: number, tx?: object): Promise<void>`
+  - `listByCategoryId(googleAuthId: number, categoryId: number, tx?: object): Promise<Array<{id: number, categoryId: number, propertyId: number, name: string, exclusive: boolean, value: string, sort: number}>>`
+  - `setByCategoryId(googleAuthId: number, categoryId: number, properties: Array<{propertyId: number, value: string, sort?: number}>, tx?: object): Promise<Array<{id: number, categoryId: number, propertyId: number, name: string, exclusive: boolean, value: string, sort: number}>>`
 - [optionslist](API.optionslist.md)
   - `getOptionsByArticleSku(googleAuthId: number, sku: string, tx?: object): Promise<Array<{id: number, articleId: number, sku: string, name: string|null, count: number, sort: number, mandated: boolean}>>`
   - `setOptionsByArticleSku(googleAuthId: number, sku: string, options?: Array<{articleId?: number, sku?: string, count?: number, sort?: number, mandated?: boolean}>, tx?: object): Promise<Array<{id: number, articleId: number, sku: string, name: string|null, count: number, sort: number, mandated: boolean}>>`

API.posterminal.md

@@ -280,6 +280,24 @@ Completes POS device pairing for a terminal.
 
 `Promise<{id: number, token: string, clientserial: string|null, pairedAt: string|null}>`
 
+## `posterminal.setMaxKnownTombstoneId`
+
+*Source: `src/store/posterminal/setMaxKnownTombstoneId.js`*
+
+Updates the max known tombstone ID for a POS terminal.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `id` | `number` | The posterminal id. |
+| `maxknowntombstoneid` | `number|null` | The highest synced tombstone ID. |
+| `[tx]` | `object` | Optional transaction to run within. |
+
+**Returns**
+
+`Promise<{id: number, maxknowntombstoneid: number|null}>`
+
 ## `posterminal.setOff`
 
 *Source: `src/store/posterminal/setOff.js`*

generate-schema-graph.js

@@ -170,6 +170,9 @@ function addInferredEdges(tables, edges) {
       const match = column.name.match(/^(.+)_id$/i);
       if (!match) continue;
 
+      // Tombstone tables store references to deleted entities, not active foreign keys.
+      if (tableName.includes('tombstone')) continue;
+
       const candidate = match[1];
       if (!tables.has(candidate) || candidate === tableName) continue;
       if (explicitlyConstrained.has(`${tableName}.${column.name}`)) continue;
@@ -351,6 +354,7 @@ const CLUSTERS = [
       'article',
       'articleean',
       'articlehistory',
+      'articletombstone',
       'articlelist',
       'articlelistarticle',
       'optionslist',
@@ -374,7 +378,20 @@ const CLUSTERS = [
     tables: ['tax', 'price'],
   },
   { id: 'units', label: 'Units', tables: ['unit'] },
-  { id: 'pos', label: 'POS', tables: ['posterminal', 'posterminalcategory', 'printer'] },
+  { id: 'pos', label: 'POS', tables: ['posterminal', 'posterminalcategory', 'printer', 'labeltemplate'] },
+  {
+    id: 'attributes',
+    label: 'Properties & Attributes',
+    tables: [
+      'propertyname',
+      'articleproperty',
+      'categoryproperty',
+      'attributename',
+      'attributevalue',
+      'articleattributevalue',
+      'categoryattributevalue',
+    ],
+  },
 ];
 
 const COLORS = {

scripts/test-categoryproperty-and-attrvalue.js

@@ -0,0 +1,175 @@
+import assert from 'node:assert/strict';
+import { mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import LibDashStore from '../src/index.js';
+import { BetterSqlite3Provider } from '../src/providers/sqlite3/index.js';
+
+async function run() {
+  console.log('--- Testing CategoryProperty & CategoryAttributeValue ---');
+
+  const tempDir = mkdtempSync(join(tmpdir(), 'test-cat-prop-attr-'));
+  const dbFile = join(tempDir, 'test.db');
+  const storageDir = join(tempDir, 'storage');
+
+  const provider = new BetterSqlite3Provider({
+    filename: dbFile,
+    storageDir,
+  });
+
+  await provider.initialize();
+  const store = await new LibDashStore(provider);
+
+  try {
+    const googleAuthId = await store.google_auth.add('tester@example.com');
+    const company = await store.company.create({
+      name: 'Test Corp',
+      iso639: 'de',
+      taxrate: 19,
+      reducedtaxrate: 7,
+      googleAuthId,
+    });
+    await store.google_auth.setSelectedCompany(googleAuthId, company.id);
+
+    // Create a subcategory under root
+    const category = await store.category.createUnderParent({
+      googleAuthId,
+      parentId: company.rootCategoryId,
+      name: 'Test Category',
+    });
+    assert.ok(category.id > 0);
+
+    // 1. Test CategoryProperty
+    console.log('1. Testing categoryproperty CRUD...');
+    const prop1 = await store.propertyname.create(googleAuthId, {
+      name: 'Material Care',
+      exclusive: true,
+    });
+    const prop2 = await store.propertyname.create(googleAuthId, {
+      name: 'Season',
+      exclusive: false,
+    });
+
+    // Set properties
+    const setProps = await store.categoryproperty.setByCategoryId(googleAuthId, category.id, [
+      { propertyId: prop1.id, value: 'Dry Clean Only', sort: 10 },
+      { propertyId: prop2.id, value: 'Summer 2026', sort: 20 },
+    ]);
+    assert.equal(setProps.length, 2);
+
+    // List properties
+    const listedProps = await store.categoryproperty.listByCategoryId(googleAuthId, category.id);
+    assert.equal(listedProps.length, 2);
+    assert.equal(listedProps[0].name, 'Material Care');
+    assert.equal(listedProps[0].value, 'Dry Clean Only');
+    assert.equal(listedProps[0].exclusive, true);
+    assert.equal(listedProps[1].name, 'Season');
+    assert.equal(listedProps[1].value, 'Summer 2026');
+    assert.equal(listedProps[1].exclusive, false);
+
+    // Test exclusive violation on categoryproperty
+    await assert.rejects(
+      async () => {
+        await store.categoryproperty.setByCategoryId(googleAuthId, category.id, [
+          { propertyId: prop1.id, value: 'Val 1' },
+          { propertyId: prop1.id, value: 'Val 2' },
+        ]);
+      },
+      /exclusive/i,
+      'Should reject multiple values for exclusive property'
+    );
+
+    // Delete single property
+    await store.categoryproperty.delete(googleAuthId, category.id, prop1.id);
+    const afterDeleteProps = await store.categoryproperty.listByCategoryId(googleAuthId, category.id);
+    assert.equal(afterDeleteProps.length, 1);
+    assert.equal(afterDeleteProps[0].propertyId, prop2.id);
+
+    console.log('CategoryProperty tests passed!');
+
+    // 2. Test CategoryAttributeValue
+    console.log('2. Testing categoryattributevalue CRUD...');
+    const attrExclusive = await store.attributename.create(googleAuthId, {
+      name: 'Department',
+      exclusive: true,
+    });
+    const valDeptMen = await store.attributevalue.create(googleAuthId, attrExclusive.id, {
+      value: 'Men',
+    });
+    const valDeptWomen = await store.attributevalue.create(googleAuthId, attrExclusive.id, {
+      value: 'Women',
+    });
+
+    const attrMulti = await store.attributename.create(googleAuthId, {
+      name: 'Tags',
+      exclusive: false,
+    });
+    const valTagSale = await store.attributevalue.create(googleAuthId, attrMulti.id, {
+      value: 'Sale',
+    });
+    const valTagNew = await store.attributevalue.create(googleAuthId, attrMulti.id, {
+      value: 'New',
+    });
+
+    // Bulk set with numeric array
+    const setAttrValues = await store.categoryattributevalue.setByCategoryId(googleAuthId, category.id, [
+      valDeptMen.id,
+      valTagSale.id,
+      valTagNew.id,
+    ]);
+    assert.equal(setAttrValues.length, 3);
+
+    // List attribute values
+    const listedAttrValues = await store.categoryattributevalue.listByCategoryId(googleAuthId, category.id);
+    assert.equal(listedAttrValues.length, 3);
+    const deptMatch = listedAttrValues.find((v) => v.attributeName === 'Department');
+    assert.ok(deptMatch);
+    assert.equal(deptMatch.value, 'Men');
+    assert.equal(deptMatch.exclusive, true);
+
+    // Test exclusive violation
+    await assert.rejects(
+      async () => {
+        await store.categoryattributevalue.setByCategoryId(googleAuthId, category.id, [
+          valDeptMen.id,
+          valDeptWomen.id,
+        ]);
+      },
+      /exclusive/i,
+      'Should reject multiple values for exclusive attribute'
+    );
+
+    // Test flexible object shapes in setByCategoryId
+    const setWithObjs = await store.categoryattributevalue.setByCategoryId(googleAuthId, category.id, [
+      { attributeValueId: valDeptWomen.id, sort: 5 },
+      { id: valTagSale.id, sort: 15 },
+    ]);
+    assert.equal(setWithObjs.length, 2);
+    const listedAfterObjSet = await store.categoryattributevalue.listByCategoryId(googleAuthId, category.id);
+    assert.equal(listedAfterObjSet.length, 2);
+    assert.equal(listedAfterObjSet[0].value, 'Women');
+    assert.equal(listedAfterObjSet[0].sort, 5);
+
+    // 3. Test cascade deletion on category delete
+    console.log('3. Testing cascade deletion when category is deleted...');
+    await store.category.delete({ googleAuthId, id: category.id });
+
+    // Directly query database to ensure categoryproperty and categoryattributevalue rows were deleted by FK cascade
+    const remainingProps = await provider.query('SELECT * FROM categoryproperty WHERE category_id = @id', { id: category.id });
+    assert.equal(remainingProps.rows.length, 0);
+
+    const remainingAttrValues = await provider.query('SELECT * FROM categoryattributevalue WHERE category_id = @id', { id: category.id });
+    assert.equal(remainingAttrValues.rows.length, 0);
+
+    console.log('All CategoryProperty and CategoryAttributeValue tests passed successfully!');
+  } finally {
+    try {
+      rmSync(tempDir, { recursive: true, force: true });
+    } catch {}
+  }
+}
+
+run().catch((err) => {
+  console.error('Test failed:', err);
+  process.exit(1);
+});

scripts/test-history-and-attrvalue.js

@@ -0,0 +1,121 @@
+import assert from 'node:assert/strict';
+import { mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import LibDashStore from '../src/index.js';
+import { BetterSqlite3Provider } from '../src/providers/sqlite3/index.js';
+
+async function run() {
+  console.log('--- Testing Father History & AttributeValue Shapes ---');
+
+  const tempDir = mkdtempSync(join(tmpdir(), 'test-hist-attr-'));
+  const dbFile = join(tempDir, 'test.db');
+  const storageDir = join(tempDir, 'storage');
+
+  const provider = new BetterSqlite3Provider({
+    filename: dbFile,
+    storageDir,
+  });
+
+  await provider.initialize();
+  const store = await new LibDashStore(provider);
+
+  try {
+    const googleAuthId = await store.google_auth.add('tester@example.com');
+    const company = await store.company.create({
+      name: 'Test Corp',
+      iso639: 'de',
+      taxrate: 19,
+      reducedtaxrate: 7,
+      googleAuthId,
+    });
+    await store.google_auth.setSelectedCompany(googleAuthId, company.id);
+
+    console.log('1. Testing setFatherBySku history logging...');
+    const father = await store.article.createUnderParent({
+      googleAuthId,
+      parentId: company.rootCategoryId,
+      name: 'Father Shirt',
+    });
+    const child = await store.article.createUnderParent({
+      googleAuthId,
+      parentId: company.rootCategoryId,
+      name: 'Child Shirt Red',
+    });
+
+    // Check history before linking
+    let fatherHist = await store.article.getHistoryBySku(googleAuthId, father.sku);
+    assert.equal(fatherHist.length, 1);
+    assert.match(fatherHist[0].text, /angelegt/);
+
+    // Link child to father
+    await store.article.setFatherBySku(googleAuthId, child.sku, father.sku);
+
+    // Father history must now contain the conversion entry and the child entry!
+    fatherHist = await store.article.getHistoryBySku(googleAuthId, father.sku);
+    const hasConversion = fatherHist.some((h) => h.text.includes('Artikel zu Vaterartikel konvertiert'));
+    const hasVariantAdded = fatherHist.some((h) => h.text.includes('hinzugefügt'));
+    assert.ok(hasConversion, `Father history missing conversion row: ${JSON.stringify(fatherHist)}`);
+    assert.ok(hasVariantAdded, `Father history missing variant added row: ${JSON.stringify(fatherHist)}`);
+
+    // Child history must contain the assignment entry
+    const childHist = await store.article.getHistoryBySku(googleAuthId, child.sku);
+    const hasAssigned = childHist.some((h) => h.text.includes('als Variante von'));
+    assert.ok(hasAssigned, `Child history missing variant assigned row: ${JSON.stringify(childHist)}`);
+
+    console.log('2. Testing importRows Pass 2 history logging...');
+    const importRes = await store.article.importRows({
+      googleAuthId,
+      rows: [
+        { sku: 'IMP-FATHER', name: 'Imported Father', parentId: company.rootCategoryId },
+        { sku: 'IMP-CHILD', name: 'Imported Child', parentId: company.rootCategoryId, fatherSku: 'IMP-FATHER' },
+      ],
+    });
+    assert.equal(importRes.errors.length, 0);
+
+    const impFatherHist = await store.article.getHistoryBySku(googleAuthId, 'IMP-FATHER');
+    const impHasConversion = impFatherHist.some((h) => h.text.includes('Artikel zu Vaterartikel konvertiert'));
+    assert.ok(impHasConversion, `Imported father missing conversion row: ${JSON.stringify(impFatherHist)}`);
+
+    console.log('3. Testing flexible attributevalue request shapes in setByArticleSku...');
+    const attrName = await store.attributename.create(googleAuthId, { name: 'Farbe' });
+    const val1 = await store.attributevalue.create(googleAuthId, attrName.id, { value: 'Rot' });
+    const val2 = await store.attributevalue.create(googleAuthId, attrName.id, { value: 'Blau' });
+
+    // Test A: Array of IDs [val1.id, val2.id]
+    let res = await store.articleattributevalue.setByArticleSku(googleAuthId, child.sku, [val1.id]);
+    assert.equal(res.length, 1);
+    assert.equal(res[0].attributeValueId, val1.id);
+
+    // Test B: Array of objects with .id [{ id: val1.id }]
+    res = await store.articleattributevalue.setByArticleSku(googleAuthId, child.sku, [{ id: val2.id }]);
+    assert.equal(res.length, 1);
+    assert.equal(res[0].attributeValueId, val2.id);
+
+    // Test C: Array of objects with .attributeValueId
+    res = await store.articleattributevalue.setByArticleSku(googleAuthId, child.sku, [{ attributeValueId: val1.id }]);
+    assert.equal(res.length, 1);
+    assert.equal(res[0].attributeValueId, val1.id);
+
+    // Test D: Array of objects with attributeId and value
+    res = await store.articleattributevalue.setByArticleSku(googleAuthId, child.sku, [{ attributeId: attrName.id, value: 'Blau' }]);
+    assert.equal(res.length, 1);
+    assert.equal(res[0].attributeValueId, val2.id);
+
+    // Test E: Array of objects with attributeName and value
+    res = await store.articleattributevalue.setByArticleSku(googleAuthId, child.sku, [{ attributeName: 'Farbe', value: 'Rot' }]);
+    assert.equal(res.length, 1);
+    assert.equal(res[0].attributeValueId, val1.id);
+
+    console.log('✅ ALL TESTS PASSED SUCCESSFULLY');
+  } finally {
+    try {
+      rmSync(tempDir, { recursive: true, force: true });
+    } catch {}
+  }
+}
+
+run().catch((err) => {
+  console.error('Test failed:', err);
+  process.exit(1);
+});

scripts/test-stueckliste-stock.js

@@ -80,20 +80,29 @@ async function run() {
     assert.equal(wh1BundleStock, 5, 'Bundle stock in Hauptlager should be 5 (min(10/1, 10/2))');
     assert.equal(wh2BundleStock, 0, 'Bundle stock in Filiale should be 0');
 
-    // Book in 3x Stückliste bundle into Filiale
+    // Verify store.stock.adjust rejects adjustment on Stückliste
-    const adjustResult = await store.stock.adjust(googleAuthId, {
+    await assert.rejects(
-      sku: bundle.sku,
+      () =>
-      warehouseId: wh2.id,
+        store.stock.adjust(googleAuthId, {
-      amount: 3,
+          sku: bundle.sku,
-      text: 'Production bundle book-in',
+          warehouseId: wh2.id,
-    });
+          amount: 3,
+          text: 'Attempt to adjust Stückliste directly',
+        }),
+      (err) => {
+        assert.match(err.message, /A Stückliste cannot have manual stock adjustments/);
+        return true;
+      },
+      'Should reject stock adjust on Stückliste bundle'
+    );
 
-    // Verify adjust result lines
+    // Book components directly into Filiale: 3x comp1, 6x comp2
-    assert.equal(adjustResult.lines.length, 2, 'Should expand into 2 component lines');
+    await store.stock.adjust(googleAuthId, {
-    const comp1Line = adjustResult.lines.find((l) => l.sku === comp1.sku);
+      lines: [
-    const comp2Line = adjustResult.lines.find((l) => l.sku === comp2.sku);
+        { sku: comp1.sku, warehouseId: wh2.id, amount: 3, text: 'Direct component 1 book-in' },
-    assert.equal(comp1Line.amount, 3, 'Component 1 should get 3 * 1 = 3');
+        { sku: comp2.sku, warehouseId: wh2.id, amount: 6, text: 'Direct component 2 book-in' },
-    assert.equal(comp2Line.amount, 6, 'Component 2 should get 3 * 2 = 6');
+      ],
+    });
 
     // Verify bundle article itself has NO entries in the ledger
     const bundleLedger = await store.ledger.listBySku(googleAuthId, bundle.sku);
@@ -112,17 +121,17 @@ async function run() {
     const wh2AfterBookIn = afterBundleBookIn.article.warehouses.find((w) => w.id === wh2.id).stock;
     assert.equal(wh2AfterBookIn, 3, 'Bundle stock in Filiale should be 3');
 
-    // Test booking out 1x bundle from Filiale
+    // Test booking out components from Filiale: -1x comp1, -2x comp2 (equivalent to 1 bundle sale)
     await store.stock.adjust(googleAuthId, {
-      sku: bundle.sku,
+      lines: [
-      warehouseId: wh2.id,
+        { sku: comp1.sku, warehouseId: wh2.id, amount: -1, text: 'Component 1 book-out' },
-      amount: -1,
+        { sku: comp2.sku, warehouseId: wh2.id, amount: -2, text: 'Component 2 book-out' },
-      text: 'Sale bundle book-out',
+      ],
     });
 
     const afterRemoval = await store.article.getBySku(googleAuthId, bundle.sku);
     const wh2AfterRemoval = afterRemoval.article.warehouses.find((w) => w.id === wh2.id).stock;
-    assert.equal(wh2AfterRemoval, 2, 'Bundle stock in Filiale should be 2 after -1 removal');
+    assert.equal(wh2AfterRemoval, 2, 'Bundle stock in Filiale should be 2 after component removal');
 
     // Verify components stock after removal in Filiale: comp1 = 2, comp2 = 4
     const comp1After = await store.article.getBySku(googleAuthId, comp1.sku);

scripts/test-tombstone.js

@@ -0,0 +1,210 @@
+import assert from 'node:assert/strict';
+import { mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import LibDashStore from '../src/index.js';
+import { BetterSqlite3Provider } from '../src/providers/sqlite3/index.js';
+
+async function run() {
+  console.log('--- Testing articletombstone table and deletion flow ---');
+
+  const tempDir = mkdtempSync(join(tmpdir(), 'test-tombstone-'));
+  const dbFile = join(tempDir, 'test.db');
+  const storageDir = join(tempDir, 'storage');
+
+  const provider = new BetterSqlite3Provider({
+    filename: dbFile,
+    storageDir,
+  });
+
+  await provider.initialize();
+  const store = await new LibDashStore(provider);
+
+  try {
+    // 1. Verify table exists and has expected columns
+    console.log('1. Checking articletombstone schema...');
+    const tableInfo = provider.db.pragma('table_info("articletombstone")');
+    const colNames = tableInfo.map((c) => c.name);
+    console.log('articletombstone columns:', colNames);
+    assert.deepEqual(colNames, [
+      'id',
+      'company_id',
+      'article_id',
+      'sku',
+      'name',
+      'taxrate',
+      'net',
+      'deleted_at',
+    ]);
+
+    // Setup company first
+    console.log('2. Setting up base data...');
+    const googleAuthId = await store.google_auth.add('tombstone-tester@example.com');
+    const company = await store.company.create({
+      name: 'Tombstone Corp',
+      iso639: 'de',
+      taxrate: 19,
+      reducedtaxrate: 7,
+      googleAuthId,
+    });
+    await store.google_auth.setSelectedCompany(googleAuthId, company.id);
+
+    // 3. Test CHECK constraint (article_id IS NOT NULL OR sku IS NOT NULL)
+    console.log('3. Testing CHECK constraint...');
+    // Setting both article_id and sku to NULL should fail
+    assert.throws(() => {
+      provider.db.prepare(`
+        INSERT INTO articletombstone (company_id, article_id, sku, name)
+        VALUES (?, NULL, NULL, 'Test')
+      `).run(company.id);
+    }, /CHECK constraint failed/);
+
+    // article_id present, sku null -> should succeed
+    const r1 = provider.db.prepare(`
+      INSERT INTO articletombstone (company_id, article_id, sku, name)
+      VALUES (?, 999, NULL, 'Only ID')
+    `).run(company.id);
+    assert.ok(r1.lastInsertRowid);
+
+    // sku present, article_id null -> should succeed
+    const r2 = provider.db.prepare(`
+      INSERT INTO articletombstone (company_id, article_id, sku, name)
+      VALUES (?, NULL, 'SKU-ONLY', 'Only SKU')
+    `).run(company.id);
+    assert.ok(r2.lastInsertRowid);
+
+    // Clean up manual test entries
+    provider.db.prepare('DELETE FROM articletombstone').run();
+
+    // 4. Test article deletion flow
+    console.log('4. Creating test article...');
+
+    const article = await store.article.createUnderParent({
+      googleAuthId,
+      parentId: company.rootCategoryId,
+      name: 'Coffee Mug',
+    });
+
+    // Set prices for the article
+    await store.article.setPricesBySku(googleAuthId, article.sku, [
+      { price: 12.50, tax: 19, minmultiplier: 1 },
+    ]);
+
+    // Verify article exists
+    const detailBefore = await store.article.getBySku(googleAuthId, article.sku);
+    assert.equal(detailBefore.article.name, 'Coffee Mug');
+    assert.equal(detailBefore.article.prices[0].net, 12.50);
+    assert.equal(detailBefore.article.prices[0].taxRate, 19);
+
+    // Delete the article
+    console.log('4. Deleting article and checking tombstone creation...');
+    await store.article.delete(googleAuthId, article.sku);
+
+    // Verify article is deleted
+    await assert.rejects(
+      () => store.article.getBySku(googleAuthId, article.sku),
+      /Article not found/
+    );
+
+    // Verify tombstone record
+    const tombstones = provider.db.prepare('SELECT * FROM articletombstone WHERE sku = ?').all(article.sku);
+    assert.equal(tombstones.length, 1);
+    const tomb = tombstones[0];
+    console.log('Created tombstone:', tomb);
+    assert.equal(tomb.company_id, company.id);
+    assert.equal(tomb.article_id, article.id);
+    assert.equal(tomb.sku, article.sku);
+    assert.equal(tomb.name, 'Coffee Mug');
+    assert.equal(tomb.net, 12.50);
+    assert.equal(tomb.taxrate, 19);
+    assert.ok(tomb.deleted_at);
+
+    // 5. Test cascading deletion with father and variants
+    console.log('5. Testing father with variant child deletion...');
+    const father = await store.article.createUnderParent({
+      googleAuthId,
+      parentId: company.rootCategoryId,
+      name: 'Pants',
+    });
+    const attrName = await store.attributename.create(googleAuthId, { name: 'Größe' });
+    await store.article.toggleFather(googleAuthId, father.sku, {
+      isFather: true,
+      attributeNameId: attrName.id,
+    });
+    const child = await store.article.addChild(googleAuthId, father.sku, { value: 'M' });
+    await store.article.setPricesBySku(googleAuthId, child.article.sku, [
+      { price: 49.99, tax: 19, minmultiplier: 1 },
+    ]);
+
+    // Delete child via removeChild with deleteArticle
+    console.log('Deleting child via removeChild({ deleteArticle: true })...');
+    await store.article.removeChild(googleAuthId, father.sku, child.article.sku, { deleteArticle: true });
+
+    // Add another child and delete father with cascade: true
+    const child2 = await store.article.addChild(googleAuthId, father.sku, { value: 'L' });
+    console.log('Deleting father with cascade: true...');
+    await store.article.delete(googleAuthId, father.sku, { cascade: true });
+
+    const allTombstones = provider.db.prepare('SELECT * FROM articletombstone ORDER BY id ASC').all();
+    assert.equal(allTombstones.length, 4);
+
+    // 1st tombstone: Coffee Mug
+    assert.equal(allTombstones[0].name, 'Coffee Mug');
+    assert.equal(allTombstones[0].sku, '1');
+    assert.equal(allTombstones[0].net, 12.5);
+    assert.equal(allTombstones[0].taxrate, 19);
+
+    // 2nd tombstone: Pants - M (deleted via removeChild)
+    assert.equal(allTombstones[1].name, 'Pants - M');
+    assert.equal(allTombstones[1].sku, child.article.sku);
+    assert.equal(allTombstones[1].net, 49.99);
+    assert.equal(allTombstones[1].taxrate, 19);
+
+    // 3rd tombstone: Pants - L (child deleted in cascade)
+    assert.equal(allTombstones[2].name, 'Pants - L');
+    assert.equal(allTombstones[2].sku, child2.article.sku);
+
+    // 4th tombstone: Pants (father deleted in cascade)
+    assert.equal(allTombstones[3].name, 'Pants');
+    assert.equal(allTombstones[3].sku, father.sku);
+
+    // 6. Test posterminal maxknowntombstoneid column and updates
+    console.log('6. Testing posterminal maxknowntombstoneid column...');
+    const posterminalCols = provider.db.pragma('table_info("posterminal")').map((c) => c.name);
+    assert.ok(posterminalCols.includes('maxknowntombstoneid'), 'posterminal should have maxknowntombstoneid column');
+
+    const terminal = await store.posterminal.upsert(googleAuthId, {
+      name: 'POS Terminal 1',
+      pairingpin: '1234',
+    });
+    assert.equal(terminal.maxknowntombstoneid, null);
+
+    // Pair terminal
+    await store.posterminal.pair(terminal.id, {
+      token: 'tok-123',
+      clientserial: 'SN-001',
+      pairedAt: new Date().toISOString(),
+    });
+
+    const foundByToken = await store.posterminal.findByToken('tok-123');
+    assert.equal(foundByToken.id, terminal.id);
+    assert.equal(foundByToken.maxknowntombstoneid, null);
+
+    // Update maxknowntombstoneid
+    await store.posterminal.setMaxKnownTombstoneId(terminal.id, 4);
+
+    const foundAfterUpdate = await store.posterminal.findByToken('tok-123');
+    assert.equal(foundAfterUpdate.maxknowntombstoneid, 4);
+
+    console.log('✅ ALL TOMBSTONE TESTS PASSED');
+  } finally {
+    try {
+      rmSync(tempDir, { recursive: true, force: true });
+    } catch {}
+  }
+}
+
+run().catch((err) => {
+  console.error('Test failed:', err);
+  process.exit(1);
+});

scripts/test-unique-slugs.js

@@ -0,0 +1,147 @@
+import assert from 'node:assert/strict';
+import { mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import LibDashStore from '../src/index.js';
+import { BetterSqlite3Provider } from '../src/providers/sqlite3/index.js';
+
+async function run() {
+  console.log('--- Testing Unique Slugs Disambiguation ---');
+
+  const tempDir = mkdtempSync(join(tmpdir(), 'test-slugs-'));
+  const dbFile = join(tempDir, 'test.db');
+  const storageDir = join(tempDir, 'storage');
+
+  const provider = new BetterSqlite3Provider({
+    filename: dbFile,
+    storageDir,
+  });
+
+  await provider.initialize();
+  const store = await new LibDashStore(provider);
+
+  try {
+    const googleAuthId = await store.google_auth.add('slug-tester@example.com');
+    const company = await store.company.create({
+      name: 'Slug Corp',
+      iso639: 'de',
+      taxrate: 19,
+      reducedtaxrate: 7,
+      googleAuthId,
+    });
+    await store.google_auth.setSelectedCompany(googleAuthId, company.id);
+
+    console.log('1. Testing createUnderParent duplicate slugs...');
+    const art1 = await store.article.createUnderParent({
+      googleAuthId,
+      parentId: company.rootCategoryId,
+      name: 'Root Father Shirt',
+    });
+    const art1Res = await store.article.getBySku(googleAuthId, art1.sku);
+    assert.equal(art1Res.article.slug, 'root-father-shirt', `Expected slug 'root-father-shirt', got '${art1Res.article.slug}'`);
+
+    const art2 = await store.article.createUnderParent({
+      googleAuthId,
+      parentId: company.rootCategoryId,
+      name: 'Root Father Shirt',
+    });
+    const art2Res = await store.article.getBySku(googleAuthId, art2.sku);
+    assert.equal(art2Res.article.slug, 'root-father-shirt-2', `Expected slug 'root-father-shirt-2', got '${art2Res.article.slug}'`);
+
+    const art3 = await store.article.createUnderParent({
+      googleAuthId,
+      parentId: company.rootCategoryId,
+      name: 'Root Father Shirt',
+    });
+    const art3Res = await store.article.getBySku(googleAuthId, art3.sku);
+    assert.equal(art3Res.article.slug, 'root-father-shirt-3', `Expected slug 'root-father-shirt-3', got '${art3Res.article.slug}'`);
+
+    console.log('2. Testing updateBySku self-collision and renaming...');
+    // Update art2 without changing name
+    await store.article.updateBySku(googleAuthId, art2.sku, { unitamount: 2 });
+    let updated2 = await store.article.getBySku(googleAuthId, art2.sku);
+    assert.equal(updated2.article.slug, 'root-father-shirt-2', `Expected unchanged slug, got '${updated2.article.slug}'`);
+
+    // Update art2 with same name
+    await store.article.updateBySku(googleAuthId, art2.sku, { name: 'Root Father Shirt' });
+    updated2 = await store.article.getBySku(googleAuthId, art2.sku);
+    assert.equal(updated2.article.slug, 'root-father-shirt-2', `Expected slug to remain 'root-father-shirt-2', got '${updated2.article.slug}'`);
+
+    // Rename art2 to something else
+    await store.article.updateBySku(googleAuthId, art2.sku, { name: 'Unique Shirt' });
+    updated2 = await store.article.getBySku(googleAuthId, art2.sku);
+    assert.equal(updated2.article.slug, 'unique-shirt', `Expected slug 'unique-shirt', got '${updated2.article.slug}'`);
+
+    // Rename art3 to 'Root Father Shirt' again: should take root-father-shirt-2 now that it is free
+    await store.article.updateBySku(googleAuthId, art3.sku, { name: 'Root Father Shirt' });
+    const updated3 = await store.article.getBySku(googleAuthId, art3.sku);
+    assert.equal(updated3.article.slug, 'root-father-shirt-2', `Expected slug to fill gap 'root-father-shirt-2', got '${updated3.article.slug}'`);
+
+    console.log('3. Testing addChild duplicate slugs...');
+    const attrName = await store.attributename.create(googleAuthId, { name: 'Größe' });
+    await store.article.toggleFather(googleAuthId, art1.sku, {
+      isFather: true,
+      attributeNameId: attrName.id,
+    });
+    const child1 = await store.article.addChild(googleAuthId, art1.sku, {
+      value: 'M',
+    });
+    assert.equal(child1.article.slug, 'root-father-shirt-m', `Expected child slug 'root-father-shirt-m', got '${child1.article.slug}'`);
+
+    // Add another child with name that yields same slug
+    const child2 = await store.article.addChild(googleAuthId, art1.sku, {
+      value: 'L',
+      name: 'Root Father Shirt - M',
+    });
+    assert.equal(child2.article.slug, 'root-father-shirt-m-2', `Expected child slug 'root-father-shirt-m-2', got '${child2.article.slug}'`);
+
+    console.log('4. Testing importRows duplicate slugs in same batch...');
+    const importRes = await store.article.importRows({
+      googleAuthId,
+      rows: [
+        { sku: 'IMP-1', name: 'Batch Shirt', parentId: company.rootCategoryId },
+        { sku: 'IMP-2', name: 'Batch Shirt', parentId: company.rootCategoryId },
+        { sku: 'IMP-3', name: 'Batch Shirt', parentId: company.rootCategoryId },
+      ],
+    });
+    assert.equal(importRes.errors.length, 0, `Import had errors: ${JSON.stringify(importRes.errors)}`);
+    assert.equal(importRes.imported.length, 3);
+
+    const imp1 = await store.article.getBySku(googleAuthId, 'IMP-1');
+    const imp2 = await store.article.getBySku(googleAuthId, 'IMP-2');
+    const imp3 = await store.article.getBySku(googleAuthId, 'IMP-3');
+
+    assert.equal(imp1.article.slug, 'batch-shirt');
+    assert.equal(imp2.article.slug, 'batch-shirt-2');
+    assert.equal(imp3.article.slug, 'batch-shirt-3');
+
+    console.log('5. Testing company isolation...');
+    const company2 = await store.company.create({
+      name: 'Other Corp',
+      iso639: 'de',
+      taxrate: 19,
+      reducedtaxrate: 7,
+      googleAuthId,
+    });
+    await store.google_auth.setSelectedCompany(googleAuthId, company2.id);
+
+    const artCompany2 = await store.article.createUnderParent({
+      googleAuthId,
+      parentId: company2.rootCategoryId,
+      name: 'Root Father Shirt',
+    });
+    const artCompany2Detail = await store.article.getBySku(googleAuthId, artCompany2.sku);
+    assert.equal(artCompany2Detail.article.slug, 'root-father-shirt', `Expected 'root-father-shirt' in company 2, got '${artCompany2Detail.article.slug}'`);
+
+    console.log('✅ ALL SLUG TESTS PASSED');
+  } finally {
+    try {
+      rmSync(tempDir, { recursive: true, force: true });
+    } catch {}
+  }
+}
+
+run().catch((err) => {
+  console.error('Test failed:', err);
+  process.exit(1);
+});

scripts/test-variant-flow.js

@@ -0,0 +1,130 @@
+import assert from 'node:assert/strict';
+import { mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import LibDashStore from '../src/index.js';
+import { BetterSqlite3Provider } from '../src/providers/sqlite3/index.js';
+
+async function run() {
+  console.log('--- Testing Variant Flow: Next-Free SKU, Fathersort Reclaim, and Duplicate Protection ---');
+
+  const tempDir = mkdtempSync(join(tmpdir(), 'test-variants-'));
+  const dbFile = join(tempDir, 'test.db');
+  const storageDir = join(tempDir, 'storage');
+
+  const provider = new BetterSqlite3Provider({
+    filename: dbFile,
+    storageDir,
+  });
+
+  await provider.initialize();
+  const store = await new LibDashStore(provider);
+
+  try {
+    const googleAuthId = await store.google_auth.add('variant-tester@example.com');
+    const company = await store.company.create({
+      name: 'Variant Corp',
+      iso639: 'de',
+      taxrate: 19,
+      reducedtaxrate: 7,
+      googleAuthId,
+    });
+    await store.google_auth.setSelectedCompany(googleAuthId, company.id);
+
+    // Create father article
+    const father = await store.article.createUnderParent({
+      googleAuthId,
+      parentId: company.rootCategoryId,
+      name: 'T-Shirt',
+    });
+    const attrName = await store.attributename.create(googleAuthId, { name: 'Farbe' });
+    await store.article.toggleFather(googleAuthId, father.sku, {
+      isFather: true,
+      attributeNameId: attrName.id,
+    });
+
+    console.log('1. Add initial children (Rot, Blau, Grün)...');
+    const child1 = await store.article.addChild(googleAuthId, father.sku, { value: 'Rot' });
+    const child2 = await store.article.addChild(googleAuthId, father.sku, { value: 'Blau' });
+    const child3 = await store.article.addChild(googleAuthId, father.sku, { value: 'Grün' });
+
+    assert.equal(child1.article.sku, `${father.sku}-1`);
+    assert.equal(child2.article.sku, `${father.sku}-2`);
+    assert.equal(child3.article.sku, `${father.sku}-3`);
+
+    let list = await store.article.listChildren(googleAuthId, father.sku);
+    assert.equal(list.length, 3);
+    assert.deepEqual(list.map((c) => c.fathersort), [0, 1, 2]);
+
+    console.log('2. Testing Duplicate Variant Protection (Defect 3)...');
+    await assert.rejects(
+      async () => {
+        await store.article.addChild(googleAuthId, father.sku, { value: 'Rot' });
+      },
+      (err) => {
+        assert.match(err.message, /Variant with this attribute value already exists/);
+        return true;
+      },
+      'Expected duplicate variant attribute value to be rejected'
+    );
+
+    console.log('3. Unlink middle child (child2 / SKU-2) -> leaves orphan holding SKU-2 (Bug A & B)...');
+    await store.article.removeChild(googleAuthId, father.sku, child2.article.sku, {
+      deleteArticle: false,
+    });
+
+    // Check that remaining children's fathersort was recompacted
+    list = await store.article.listChildren(googleAuthId, father.sku);
+    assert.equal(list.length, 2);
+    assert.deepEqual(list.map((c) => c.sku), [child1.article.sku, child3.article.sku]);
+    assert.deepEqual(list.map((c) => c.fathersort), [0, 1]);
+
+    // Check orphan still exists in DB
+    const orphan = await store.article.getBySku(googleAuthId, child2.article.sku);
+    assert.equal(orphan.article.fatherArticleId, null);
+    assert.equal(orphan.article.sku, `${father.sku}-2`);
+
+    console.log('4. Add new child (Gelb) -> SKU must NOT collide with orphan (Bug A: next free index)...');
+    const child4 = await store.article.addChild(googleAuthId, father.sku, { value: 'Gelb' });
+    // Since SKU-1, SKU-2 (orphan), SKU-3 exist, next free index is 4
+    assert.equal(child4.article.sku, `${father.sku}-4`);
+
+    list = await store.article.listChildren(googleAuthId, father.sku);
+    assert.equal(list.length, 3);
+    assert.deepEqual(list.map((c) => c.fathersort), [0, 1, 2]);
+
+    console.log('5. Testing gaps in fathersort (Evidence: father with child at fathersort: 1)...');
+    // Unlink child3 and child4 so only child1 remains
+    await store.article.removeChild(googleAuthId, father.sku, child3.article.sku, { deleteArticle: true });
+    await store.article.removeChild(googleAuthId, father.sku, child4.article.sku, { deleteArticle: true });
+
+    // Manually force child1's fathersort: 1 to simulate pre-existing gap state (like father 94)
+    await provider.query(
+      `UPDATE article SET fathersort = 1 WHERE sku = @sku`,
+      { sku: child1.article.sku }
+    );
+    list = await store.article.listChildren(googleAuthId, father.sku);
+    assert.equal(list.length, 1);
+    assert.equal(list[0].fathersort, 1); // exactly like father 94
+
+    // Now adding a variant MUST NOT hit UNIQUE constraint failed (409)
+    console.log('Adding variant to father with child at fathersort: 1...');
+    const child5 = await store.article.addChild(googleAuthId, father.sku, { value: 'Schwarz' });
+    assert.ok(child5);
+    list = await store.article.listChildren(googleAuthId, father.sku);
+    assert.equal(list.length, 2);
+    // Fathersort should have picked 0 (next free non-negative integer)
+    assert.deepEqual(list.map((c) => c.fathersort), [0, 1]);
+
+    console.log('✅ ALL VARIANT FLOW TESTS PASSED');
+  } finally {
+    try {
+      rmSync(tempDir, { recursive: true, force: true });
+    } catch {}
+  }
+}
+
+run().catch((err) => {
+  console.error('Test failed:', err);
+  process.exit(1);
+});

src/index.js

@@ -113,6 +113,7 @@ import posterminalGetDeletedEntityCount from './store/posterminal/getDeletedEnti
 import posterminalGetMaxOrderIdCount from './store/posterminal/getMaxOrderIdCount.js';
 import posterminalGetCategoryList from './store/posterminal/getCategoryList.js';
 import posterminalGetProductList from './store/posterminal/getProductList.js';
+import posterminalSetMaxKnownTombstoneId from './store/posterminal/setMaxKnownTombstoneId.js';
 import langCreate from './store/lang/create.js';
 import langDelete from './store/lang/delete.js';
 import langList from './store/lang/list.js';
@@ -181,6 +182,11 @@ import attributevalueOrder from './store/attributevalue/order.js';
 import attributevalueDelete from './store/attributevalue/delete.js';
 import articleattributevalueListByArticleSku from './store/articleattributevalue/listByArticleSku.js';
 import articleattributevalueSetByArticleSku from './store/articleattributevalue/setByArticleSku.js';
+import categorypropertyListByCategoryId from './store/categoryproperty/listByCategoryId.js';
+import categorypropertySetByCategoryId from './store/categoryproperty/setByCategoryId.js';
+import categorypropertyDelete from './store/categoryproperty/delete.js';
+import categoryattributevalueListByCategoryId from './store/categoryattributevalue/listByCategoryId.js';
+import categoryattributevalueSetByCategoryId from './store/categoryattributevalue/setByCategoryId.js';
 import articlelistGetItems from './store/articlelist/getItemsByArticleSku.js';
 import articlelistSetItems from './store/articlelist/setItemsByArticleSku.js';
 import optionslistGetOptions from './store/optionslist/getOptionsByArticleSku.js';
@@ -388,6 +394,7 @@ export default class LibDashStore {
       getMaxOrderIdCount: posterminalGetMaxOrderIdCount(provider),
       getCategoryList: posterminalGetCategoryList(provider),
       getProductList: posterminalGetProductList(provider),
+      setMaxKnownTombstoneId: posterminalSetMaxKnownTombstoneId(provider),
     };
 
     this.google_auth = {
@@ -490,6 +497,17 @@ export default class LibDashStore {
       setByArticleSku: articleattributevalueSetByArticleSku(provider),
     };
 
+    this.categoryproperty = {
+      listByCategoryId: categorypropertyListByCategoryId(provider),
+      setByCategoryId: categorypropertySetByCategoryId(provider),
+      delete: categorypropertyDelete(provider),
+    };
+
+    this.categoryattributevalue = {
+      listByCategoryId: categoryattributevalueListByCategoryId(provider),
+      setByCategoryId: categoryattributevalueSetByCategoryId(provider),
+    };
+
     this.articlelist = {
       getItemsByArticleSku: articlelistGetItems(provider),
       setItemsByArticleSku: articlelistSetItems(provider),

src/providers/mssql/queries/articleDelete.js

@@ -17,6 +17,29 @@ WHERE id = @articleId
 `;
 
 
+export const CREATE_TOMBSTONE = `
+INSERT INTO articletombstone (company_id, article_id, sku, name, taxrate, net)
+SELECT
+    a.company_id,
+    a.id AS article_id,
+    a.sku,
+    COALESCE(
+        (SELECT TOP 1 at.name FROM articletext at WHERE at.article_id = a.id AND at.language_id = co.default_language_id),
+        (SELECT TOP 1 at.name FROM articletext at WHERE at.article_id = a.id ORDER BY at.id ASC)
+    ) AS name,
+    COALESCE(
+        (SELECT TOP 1 t.rate FROM price pr INNER JOIN tax t ON t.id = pr.tax_id WHERE pr.article_id = a.id AND pr.customergroup_id = co.poscustomergroup_id AND pr.minmultiplier = 1),
+        (SELECT TOP 1 t.rate FROM price pr INNER JOIN tax t ON t.id = pr.tax_id WHERE pr.article_id = a.id ORDER BY pr.id ASC)
+    ) AS taxrate,
+    COALESCE(
+        (SELECT TOP 1 pr.net FROM price pr WHERE pr.article_id = a.id AND pr.customergroup_id = co.poscustomergroup_id AND pr.minmultiplier = 1),
+        (SELECT TOP 1 pr.net FROM price pr WHERE pr.article_id = a.id ORDER BY pr.id ASC)
+    ) AS net
+FROM article a
+INNER JOIN company co ON co.id = a.company_id
+WHERE a.id = @articleId
+`;
+
 export const DELETE_PICS_BY_ARTICLE = `
 DELETE p
 FROM pic p

src/providers/mssql/queries/articlehistory.js

@@ -9,3 +9,10 @@ FROM articlehistory
 WHERE article_id = @articleId
 ORDER BY [date] DESC, id DESC
 `;
+
+export const LIST_BY_ARTICLE_ID_LIMITED = `
+SELECT TOP (@limit) id, companyuser_id AS companyuserId, [date], [text]
+FROM articlehistory
+WHERE article_id = @articleId
+ORDER BY [date] DESC, id DESC
+`;

src/providers/mssql/queries/articletext.js

@@ -8,3 +8,13 @@ UPDATE articletext
 SET name = @name, slug = @slug
 WHERE article_id = @articleId AND language_id = @languageId
 `;
+
+export const LIST_SLUGS_BY_COMPANY_AND_LANGUAGE = `
+SELECT at.slug, at.article_id AS articleId
+FROM articletext at
+INNER JOIN article a ON a.id = at.article_id
+WHERE a.company_id = @companyId
+  AND at.language_id = @languageId
+  AND (at.slug = @baseSlug OR at.slug LIKE @likePattern)
+`;
+

src/providers/mssql/queries/categoryattributevalue.js

@@ -0,0 +1,41 @@
+export const LIST_BY_CATEGORY_ID = `
+SELECT
+    cav.id,
+    cav.category_id AS categoryId,
+    an.id AS attributeId,
+    an.name AS attributeName,
+    an.exclusive,
+    av.id AS attributeValueId,
+    av.value,
+    cav.sort
+FROM categoryattributevalue cav
+INNER JOIN attributevalue av ON av.id = cav.attributevalue_id
+INNER JOIN attributename an ON an.id = av.attribute_id
+WHERE cav.category_id = @categoryId
+ORDER BY an.sort ASC, an.id ASC, cav.sort ASC, cav.id ASC
+`;
+
+export const DELETE_BY_CATEGORY_ID = `
+DELETE FROM categoryattributevalue
+WHERE category_id = @categoryId
+`;
+
+export const INSERT_ROW = `
+INSERT INTO categoryattributevalue (category_id, attributevalue_id, sort)
+OUTPUT INSERTED.id, INSERTED.category_id AS categoryId, INSERTED.attributevalue_id AS attributeValueId, INSERTED.sort
+VALUES (@categoryId, @attributeValueId, @sort)
+`;
+
+export const GET_VALUE_DETAIL = `
+SELECT
+    av.id AS attributeValueId,
+    av.value,
+    av.sort,
+    an.id AS attributeId,
+    an.name AS attributeName,
+    an.exclusive,
+    an.company_id AS companyId
+FROM attributevalue av
+INNER JOIN attributename an ON an.id = av.attribute_id
+WHERE av.id = @attributeValueId
+`;

src/providers/mssql/queries/categoryproperty.js

@@ -0,0 +1,30 @@
+export const LIST_BY_CATEGORY_ID = `
+SELECT
+    cp.id,
+    cp.category_id AS categoryId,
+    cp.property_id AS propertyId,
+    pn.name AS name,
+    pn.exclusive,
+    cp.value,
+    cp.sort
+FROM categoryproperty cp
+INNER JOIN propertyname pn ON pn.id = cp.property_id
+WHERE cp.category_id = @categoryId
+ORDER BY cp.sort ASC, cp.id ASC
+`;
+
+export const DELETE_BY_CATEGORY_ID = `
+DELETE FROM categoryproperty
+WHERE category_id = @categoryId
+`;
+
+export const DELETE_BY_CATEGORY_AND_PROPERTY_ID = `
+DELETE FROM categoryproperty
+WHERE category_id = @categoryId AND property_id = @propertyId
+`;
+
+export const INSERT_ROW = `
+INSERT INTO categoryproperty (category_id, property_id, value, sort)
+OUTPUT INSERTED.id, INSERTED.category_id AS categoryId, INSERTED.property_id AS propertyId, INSERTED.value, INSERTED.sort
+VALUES (@categoryId, @propertyId, @value, @sort)
+`;

src/providers/mssql/queries/manifestDoc.js

@@ -108,3 +108,28 @@ VALUES (
     @taxrate
 )
 `;
+
+export const CHECK_ARTICLE_IS_FATHER = `
+SELECT
+    a.id,
+    a.is_father AS isFather,
+    COALESCE(
+        (SELECT at.name FROM articletext at WHERE at.article_id = a.id AND at.language_id = co.default_language_id),
+        (SELECT MIN(at2.name) FROM articletext at2 WHERE at2.article_id = a.id),
+        a.sku
+    ) AS articleName,
+    COALESCE(
+        (SELECT MIN(asup.pu) FROM articlesupplier asup WHERE asup.article_id = a.id AND asup.sku = @sku),
+        (SELECT MIN(asup2.pu) FROM articlesupplier asup2 WHERE asup2.article_id = a.id),
+        a.unitamount,
+        1
+    ) AS pu
+FROM article a
+INNER JOIN manifest m ON m.company_id = a.company_id
+INNER JOIN company co ON co.id = m.company_id
+WHERE m.id = @manifestId
+  AND (a.sku = @sku OR EXISTS (
+    SELECT 1 FROM articlesupplier asup WHERE asup.article_id = a.id AND asup.sku = @sku
+  ))
+`;
+

src/providers/mssql/queries/posterminal.js

@@ -5,7 +5,8 @@ SELECT
     token,
     pairingpin,
     paired_at AS pairedAt,
-    clientserial AS clientserial
+    clientserial AS clientserial,
+    maxknowntombstoneid AS maxknowntombstoneid
 FROM posterminal
 WHERE company_id = @companyId
 ORDER BY id
@@ -19,7 +20,8 @@ SELECT
     token,
     pairingpin,
     paired_at AS pairedAt,
-    clientserial AS clientserial
+    clientserial AS clientserial,
+    maxknowntombstoneid AS maxknowntombstoneid
 FROM posterminal
 WHERE id = @id
 `;
@@ -32,7 +34,8 @@ SELECT
     token,
     pairingpin,
     paired_at AS pairedAt,
-    clientserial AS clientserial
+    clientserial AS clientserial,
+    maxknowntombstoneid AS maxknowntombstoneid
 FROM posterminal
 WHERE pairingpin = @pairingpin
 `;
@@ -44,17 +47,23 @@ WHERE id = @id
 `;
 
 export const CREATE = `
-INSERT INTO posterminal (company_id, name, token, pairingpin, paired_at, clientserial)
+INSERT INTO posterminal (company_id, name, token, pairingpin, paired_at, clientserial, maxknowntombstoneid)
-OUTPUT INSERTED.id, INSERTED.name, INSERTED.token, INSERTED.pairingpin, INSERTED.paired_at AS pairedAt, INSERTED.clientserial AS clientserial
+OUTPUT INSERTED.id, INSERTED.name, INSERTED.token, INSERTED.pairingpin, INSERTED.paired_at AS pairedAt, INSERTED.clientserial AS clientserial, INSERTED.maxknowntombstoneid AS maxknowntombstoneid
-VALUES (@companyId, @name, @token, @pairingpin, @pairedAt, @clientserial)
+VALUES (@companyId, @name, @token, @pairingpin, @pairedAt, @clientserial, @maxknowntombstoneid)
 `;
 
 export const UPDATE = `
 UPDATE posterminal
-SET name = @name, token = @token, pairingpin = @pairingpin, paired_at = @pairedAt, clientserial = @clientserial
+SET name = @name, token = @token, pairingpin = @pairingpin, paired_at = @pairedAt, clientserial = @clientserial, maxknowntombstoneid = @maxknowntombstoneid
 WHERE id = @id AND company_id = @companyId
 `;
 
+export const SET_MAX_KNOWN_TOMBSTONE_ID = `
+UPDATE posterminal
+SET maxknowntombstoneid = @maxknowntombstoneid
+WHERE id = @id
+`;
+
 export const DELETE_BY_COMPANY_AND_ID = `
 DELETE FROM posterminal
 WHERE id = @id AND company_id = @companyId
@@ -122,7 +131,8 @@ SELECT
     token,
     pairingpin,
     paired_at AS pairedAt,
-    clientserial AS clientserial
+    clientserial AS clientserial,
+    maxknowntombstoneid AS maxknowntombstoneid
 FROM posterminal
 WHERE token = @token
 `;

src/providers/mssql/schema.js

@@ -352,10 +352,11 @@ BEGIN
         ALTER TABLE article ADD fatherattributename_id INT NULL;
         ALTER TABLE article ADD CONSTRAINT FK_article_fatherattributename FOREIGN KEY (fatherattributename_id) REFERENCES attributename(id) ON DELETE NO ACTION;
     END
-END
+
-ELSE IF NOT EXISTS (SELECT * FROM sys.columns WHERE object_id = OBJECT_ID('article') AND name = 'track_stock')
+    IF NOT EXISTS (SELECT * FROM sys.columns WHERE object_id = OBJECT_ID('article') AND name = 'track_stock')
-BEGIN
+    BEGIN
-    ALTER TABLE article ADD track_stock BIT NOT NULL CONSTRAINT DF_article_track_stock DEFAULT 1;
+        ALTER TABLE article ADD track_stock BIT NOT NULL CONSTRAINT DF_article_track_stock DEFAULT 1;
+    END
 END
 `;
 
@@ -374,6 +375,27 @@ BEGIN
 END
 `;
 
+export const INIT_ARTICLETOMBSTONE = `
+IF NOT EXISTS (SELECT * FROM sys.tables WHERE name = 'articletombstone')
+BEGIN
+    CREATE TABLE articletombstone (
+        id INT IDENTITY(1,1) PRIMARY KEY,
+        company_id INT NOT NULL,
+        article_id INT NULL,
+        sku NVARCHAR(100) NULL,
+        name NVARCHAR(255) NULL,
+        taxrate DECIMAL(18,4) NULL,
+        net FLOAT NULL,
+        deleted_at DATETIME2 NOT NULL CONSTRAINT DF_articletombstone_deleted_at DEFAULT SYSUTCDATETIME(),
+        CONSTRAINT CK_articletombstone_article_or_sku CHECK (article_id IS NOT NULL OR sku IS NOT NULL),
+        CONSTRAINT FK_articletombstone_company FOREIGN KEY (company_id) REFERENCES company(id) ON DELETE CASCADE
+    );
+
+    CREATE INDEX IX_articletombstone_company_deleted
+        ON articletombstone (company_id, deleted_at);
+END
+`;
+
 export const INIT_ARTICLEEAN = `
 IF NOT EXISTS (SELECT * FROM sys.tables WHERE name = 'articleean')
 BEGIN
@@ -791,10 +813,18 @@ BEGIN
         pairingpin NVARCHAR(50) NOT NULL,
         paired_at DATETIME2 NULL,
         clientserial NVARCHAR(255) NULL,
+        maxknowntombstoneid INT NULL,
         CONSTRAINT FK_posterminal_company FOREIGN KEY (company_id) REFERENCES company(id) ON DELETE CASCADE
     );
     CREATE UNIQUE INDEX UQ_posterminal_token ON posterminal(token) WHERE token IS NOT NULL;
 END
+ELSE
+BEGIN
+    IF NOT EXISTS (SELECT * FROM sys.columns WHERE object_id = OBJECT_ID('posterminal') AND name = 'maxknowntombstoneid')
+    BEGIN
+        ALTER TABLE posterminal ADD maxknowntombstoneid INT NULL;
+    END
+END
 `;
 
 export const INIT_POSTERMINALCATEGORY = `
@@ -980,6 +1010,36 @@ BEGIN
 END
 `;
 
+export const INIT_CATEGORYPROPERTY = `
+IF NOT EXISTS (SELECT * FROM sys.tables WHERE name = 'categoryproperty')
+BEGIN
+    CREATE TABLE categoryproperty (
+        id INT IDENTITY(1,1) PRIMARY KEY,
+        category_id INT NOT NULL,
+        property_id INT NOT NULL,
+        value NVARCHAR(MAX) NOT NULL,
+        sort INT NOT NULL CONSTRAINT DF_categoryproperty_sort DEFAULT 0,
+        CONSTRAINT FK_categoryproperty_category FOREIGN KEY (category_id) REFERENCES category(id) ON DELETE CASCADE,
+        CONSTRAINT FK_categoryproperty_property FOREIGN KEY (property_id) REFERENCES propertyname(id) ON DELETE CASCADE
+    );
+END
+`;
+
+export const INIT_CATEGORYATTRIBUTEVALUE = `
+IF NOT EXISTS (SELECT * FROM sys.tables WHERE name = 'categoryattributevalue')
+BEGIN
+    CREATE TABLE categoryattributevalue (
+        id INT IDENTITY(1,1) PRIMARY KEY,
+        category_id INT NOT NULL,
+        attributevalue_id INT NOT NULL,
+        sort INT NOT NULL CONSTRAINT DF_categoryattributevalue_sort DEFAULT 0,
+        CONSTRAINT FK_categoryattributevalue_category FOREIGN KEY (category_id) REFERENCES category(id) ON DELETE CASCADE,
+        CONSTRAINT FK_categoryattributevalue_attributevalue FOREIGN KEY (attributevalue_id) REFERENCES attributevalue(id) ON DELETE CASCADE,
+        CONSTRAINT UQ_categoryattributevalue_category_attributevalue UNIQUE (category_id, attributevalue_id)
+    );
+END
+`;
+
 /** DDL scripts in dependency order for schema init. */
 export const SCHEMA_SCRIPTS = [
     INIT_META,
@@ -1017,6 +1077,8 @@ export const SCHEMA_SCRIPTS = [
     INIT_ARTICLE_SUPPLIER,
     INIT_ARTICLEPROPERTY,
     INIT_ARTICLEATTRIBUTEVALUE,
+    INIT_CATEGORYPROPERTY,
+    INIT_CATEGORYATTRIBUTEVALUE,
     INIT_MANIFEST,
     INIT_MANIFESTARTICLE,
     INIT_WAREHOUSE,
@@ -1026,6 +1088,7 @@ export const SCHEMA_SCRIPTS = [
     INIT_PEEK_NEXT_NUMBER_WITH_PREFIX_AND_PADDING,
     INIT_COMPANYUSER,
     INIT_ARTICLEHISTORY,
+    INIT_ARTICLETOMBSTONE,
     INIT_ENTITYHISTORY,
     INIT_SYNCPOS,
     INIT_COMPANYSETTING,

src/providers/sqlite3/index.js

@@ -426,6 +426,9 @@ export class BetterSqlite3Provider extends BetterSqlite3Executor {
       if (posterminalCols.length > 0 && !posterminalCols.includes('clientserial')) {
         this.db.exec(`ALTER TABLE posterminal ADD COLUMN clientserial TEXT`);
       }
+      if (posterminalCols.length > 0 && !posterminalCols.includes('maxknowntombstoneid')) {
+        this.db.exec(`ALTER TABLE posterminal ADD COLUMN maxknowntombstoneid INTEGER`);
+      }
 
       const propertynameCols = this.db.pragma('table_info("propertyname")').map((c) => c.name);
       if (propertynameCols.length > 0 && !propertynameCols.includes('exclusive')) {

src/providers/sqlite3/queries/articleDelete.js

@@ -7,6 +7,29 @@ export const {
   GET_CHILDREN_IDS, GET_LIST_IDS,
 } = queries;
 
+export const CREATE_TOMBSTONE = `
+INSERT INTO articletombstone (company_id, article_id, sku, name, taxrate, net)
+SELECT
+    a.company_id,
+    a.id AS article_id,
+    a.sku,
+    COALESCE(
+        (SELECT at.name FROM articletext at WHERE at.article_id = a.id AND at.language_id = co.default_language_id),
+        (SELECT at.name FROM articletext at WHERE at.article_id = a.id ORDER BY at.id ASC LIMIT 1)
+    ) AS name,
+    COALESCE(
+        (SELECT t.rate FROM price pr INNER JOIN tax t ON t.id = pr.tax_id WHERE pr.article_id = a.id AND pr.customergroup_id = co.poscustomergroup_id AND pr.minmultiplier = 1),
+        (SELECT t.rate FROM price pr INNER JOIN tax t ON t.id = pr.tax_id WHERE pr.article_id = a.id ORDER BY pr.id ASC LIMIT 1)
+    ) AS taxrate,
+    COALESCE(
+        (SELECT pr.net FROM price pr WHERE pr.article_id = a.id AND pr.customergroup_id = co.poscustomergroup_id AND pr.minmultiplier = 1),
+        (SELECT pr.net FROM price pr WHERE pr.article_id = a.id ORDER BY pr.id ASC LIMIT 1)
+    ) AS net
+FROM article a
+INNER JOIN company co ON co.id = a.company_id
+WHERE a.id = @articleId
+`;
+
 export const DELETE_PICS_BY_ARTICLE = `
 DELETE FROM pic
 WHERE id IN (SELECT pic_id FROM articlepic WHERE article_id = @articleId)

src/providers/sqlite3/queries/articlehistory.js

@@ -2,4 +2,12 @@ import * as source from '../../mssql/queries/articlehistory.js';
 import { translateQueries } from './translate.js';
 
 const queries = translateQueries(source, 'articlehistory');
-export const { INSERT, LIST_BY_ARTICLE_ID } = queries;
+export const { INSERT, LIST_BY_ARTICLE_ID } = queries;
+
+export const LIST_BY_ARTICLE_ID_LIMITED = `
+SELECT id, companyuser_id AS companyuserId, date, text
+FROM articlehistory
+WHERE article_id = @articleId
+ORDER BY date DESC, id DESC
+LIMIT @limit
+`;

src/providers/sqlite3/queries/articletext.js

@@ -2,4 +2,8 @@ import * as source from '../../mssql/queries/articletext.js';
 import { translateQueries } from './translate.js';
 
 const queries = translateQueries(source, 'articletext');
-export const { CREATE, UPDATE_BY_ARTICLE_AND_LANGUAGE } = queries;
+export const {
+  CREATE,
+  UPDATE_BY_ARTICLE_AND_LANGUAGE,
+  LIST_SLUGS_BY_COMPANY_AND_LANGUAGE,
+} = queries;

src/providers/sqlite3/queries/categoryattributevalue.js

@@ -0,0 +1,10 @@
+import * as source from '../../mssql/queries/categoryattributevalue.js';
+import { translateQueries } from './translate.js';
+
+const queries = translateQueries(source, 'categoryattributevalue');
+export const {
+  LIST_BY_CATEGORY_ID,
+  DELETE_BY_CATEGORY_ID,
+  INSERT_ROW,
+  GET_VALUE_DETAIL,
+} = queries;

src/providers/sqlite3/queries/categoryproperty.js

@@ -0,0 +1,10 @@
+import * as source from '../../mssql/queries/categoryproperty.js';
+import { translateQueries } from './translate.js';
+
+const queries = translateQueries(source, 'categoryproperty');
+export const {
+  LIST_BY_CATEGORY_ID,
+  DELETE_BY_CATEGORY_ID,
+  DELETE_BY_CATEGORY_AND_PROPERTY_ID,
+  INSERT_ROW,
+} = queries;

src/providers/sqlite3/queries/manifestDoc.js

@@ -3,7 +3,7 @@ import { translateQueries } from './translate.js';
 
 const queries = translateQueries(source, 'manifestDoc');
 export const {
-  CREATE_LINE, CREATE_MANIFEST, DELETE_LINES_BY_MANIFEST, DELETE_MANIFEST,
+  CHECK_ARTICLE_IS_FATHER, CREATE_LINE, CREATE_MANIFEST, DELETE_LINES_BY_MANIFEST,
-  GET_MANIFEST_HEADER, GET_MANIFEST_LINES, LIST_MANIFESTS, ORDER_TYPE,
+  DELETE_MANIFEST, GET_MANIFEST_HEADER, GET_MANIFEST_LINES, LIST_MANIFESTS,
-  QUOTE_TYPE, UPDATE_MANIFEST,
+  ORDER_TYPE, QUOTE_TYPE, UPDATE_MANIFEST,
 } = queries;

src/providers/sqlite3/queries/posterminal.js

@@ -5,7 +5,7 @@ const queries = translateQueries(source, 'posterminal');
 export const {
   CREATE, DELETE_BY_COMPANY_AND_ID, GET_BY_ID, LIST_BY_COMPANY,
   LIST_CATEGORY_IDS, POSTERMINAL_IDS_BY_COMPANY, SET_OFF, SET_OFF_ALL, UPDATE,
-  FIND_BY_PAIRINGPIN, PAIR,
+  FIND_BY_PAIRINGPIN, PAIR, SET_MAX_KNOWN_TOMBSTONE_ID,
   FIND_BY_TOKEN, COUNT_PRODUCTS, COUNT_CATEGORIES, COUNT_CUSTOMERS,
   COUNT_CUSTOMER_GROUPS, COUNT_COMPOSITE_PRODUCTS, MAX_ORDER_ID,
   LIST_POS_PRODUCT_CATEGORIES, LIST_POS_CUSTOMER_GROUP_IDS, LIST_POS_PRODUCT_PRICES,

src/providers/sqlite3/schema.js

@@ -495,6 +495,23 @@ CREATE TABLE IF NOT EXISTS articlehistory (
 );
 `;
 
+export const INIT_ARTICLETOMBSTONE = `
+CREATE TABLE IF NOT EXISTS articletombstone (
+    id INTEGER PRIMARY KEY,
+    company_id INTEGER NOT NULL,
+    article_id INTEGER,
+    sku TEXT COLLATE NOCASE,
+    name TEXT,
+    taxrate NUMERIC,
+    net REAL,
+    deleted_at TEXT NOT NULL DEFAULT (${UTC_NOW}),
+    CHECK (article_id IS NOT NULL OR sku IS NOT NULL),
+    FOREIGN KEY (company_id) REFERENCES company(id) ON DELETE CASCADE
+);
+CREATE INDEX IF NOT EXISTS IX_articletombstone_company_deleted
+    ON articletombstone (company_id, deleted_at);
+`;
+
 export const INIT_ENTITYHISTORY = `
 CREATE TABLE IF NOT EXISTS entityhistory (
     id INTEGER PRIMARY KEY,
@@ -539,6 +556,7 @@ CREATE TABLE IF NOT EXISTS posterminal (
     pairingpin TEXT NOT NULL,
     paired_at TEXT,
     clientserial TEXT,
+    maxknowntombstoneid INTEGER,
     FOREIGN KEY (company_id) REFERENCES company(id) ON DELETE CASCADE
 );
 CREATE UNIQUE INDEX IF NOT EXISTS UQ_posterminal_token
@@ -684,6 +702,30 @@ CREATE TABLE IF NOT EXISTS articleattributevalue (
 );
 `;
 
+export const INIT_CATEGORYPROPERTY = `
+CREATE TABLE IF NOT EXISTS categoryproperty (
+    id INTEGER PRIMARY KEY,
+    category_id INTEGER NOT NULL,
+    property_id INTEGER NOT NULL,
+    value TEXT NOT NULL,
+    sort INTEGER NOT NULL DEFAULT 0,
+    FOREIGN KEY (category_id) REFERENCES category(id) ON DELETE CASCADE,
+    FOREIGN KEY (property_id) REFERENCES propertyname(id) ON DELETE CASCADE
+);
+`;
+
+export const INIT_CATEGORYATTRIBUTEVALUE = `
+CREATE TABLE IF NOT EXISTS categoryattributevalue (
+    id INTEGER PRIMARY KEY,
+    category_id INTEGER NOT NULL,
+    attributevalue_id INTEGER NOT NULL,
+    sort INTEGER NOT NULL DEFAULT 0,
+    FOREIGN KEY (category_id) REFERENCES category(id) ON DELETE CASCADE,
+    FOREIGN KEY (attributevalue_id) REFERENCES attributevalue(id) ON DELETE CASCADE,
+    UNIQUE (category_id, attributevalue_id)
+);
+`;
+
 /** DDL scripts in dependency order for SQLite schema initialization. */
 export const SCHEMA_SCRIPTS = [
     INIT_META,
@@ -720,6 +762,8 @@ export const SCHEMA_SCRIPTS = [
     INIT_ARTICLE_SUPPLIER,
     INIT_ARTICLEPROPERTY,
     INIT_ARTICLEATTRIBUTEVALUE,
+    INIT_CATEGORYPROPERTY,
+    INIT_CATEGORYATTRIBUTEVALUE,
     INIT_MANIFEST,
     INIT_MANIFESTARTICLE,
     INIT_WAREHOUSE,
@@ -727,6 +771,7 @@ export const SCHEMA_SCRIPTS = [
     INIT_NUMBERS,
     INIT_COMPANYUSER,
     INIT_ARTICLEHISTORY,
+    INIT_ARTICLETOMBSTONE,
     INIT_ENTITYHISTORY,
     INIT_SYNCPOS,
     INIT_COMPANYSETTING,

src/store/article/addChild.js

@@ -15,11 +15,12 @@ import { INSERT as SQLITE_INSERT_HISTORY } from '../../providers/sqlite3/queries
 import resolveArticleBySku from './resolveArticleBySku.js';
 import getBySku from './getBySku.js';
 import makeRunner from '../runner.js';
-import slugify from '../slugify.js';
+import resolveUniqueSlug from './resolveUniqueSlug.js';
 
 export default function addChild(provider) {
   const resolve = resolveArticleBySku(provider);
   const load = getBySku(provider);
+  const resolveSlug = resolveUniqueSlug(provider);
   const isSqlite = provider?.dialect === 'sqlite3';
 
   const queries = isSqlite ? sqliteArticle : mssqlArticle;
@@ -117,10 +118,46 @@ export default function addChild(provider) {
         throw new Error('Attribute value is required for child article');
       }
 
-      // Compute child SKU: father.sku + '-' + finalValueId
+      // Check if father already has a variant with this attribute value
-      const childSku = `${father.sku}-${finalValueId}`;
+      const existingVariantRes = await runner.query(
+        `SELECT a.id
+         FROM article a
+         INNER JOIN articleattributevalue aav ON aav.article_id = a.id
+         WHERE a.fatherarticle_id = @fatherId
+           AND aav.attributevalue_id = @finalValueId`,
+        { fatherId, finalValueId },
+      );
+      if (existingVariantRes.rows.length > 0) {
+        throw new Error('Variant with this attribute value already exists');
+      }
 
-      // Check if child SKU already exists
+      // Compute child SKU:
+      // If options.sku is provided, use it.
+      // Otherwise, derive using next free index: fatherSku-1, fatherSku-2, ...
+      let childSku = (typeof options.sku === 'string' && options.sku.trim()) || null;
+      if (!childSku) {
+        const existingSkusRes = await runner.query(
+          'SELECT sku FROM article WHERE company_id = @companyId AND sku LIKE @prefix',
+          { companyId, prefix: `${father.sku}-%` },
+        );
+        const usedIndices = new Set();
+        const prefix = `${father.sku}-`;
+        for (const row of existingSkusRes.rows) {
+          if (row.sku && row.sku.startsWith(prefix)) {
+            const numPart = row.sku.slice(prefix.length);
+            if (/^\d+$/.test(numPart)) {
+              usedIndices.add(parseInt(numPart, 10));
+            }
+          }
+        }
+        let nextIndex = 1;
+        while (usedIndices.has(nextIndex)) {
+          nextIndex++;
+        }
+        childSku = `${father.sku}-${nextIndex}`;
+      }
+
+      // Check if child SKU already exists (e.g. orphan holding SKU or custom SKU)
       const existingChildRes = await runner.query(
         'SELECT id FROM article WHERE sku = @childSku AND company_id = @companyId',
         { childSku, companyId },
@@ -129,9 +166,16 @@ export default function addChild(provider) {
         throw new Error(`Child article "${childSku}" already exists`);
       }
 
-      // Next fathersort
+      // Next free fathersort (smallest non-negative integer not used by any child of this father)
-      const countRes = await runner.query(getChildCountSql, { articleId: fatherId });
+      const existingSortsRes = await runner.query(
-      const fathersort = countRes.rows[0]?.count ?? 0;
+        'SELECT fathersort FROM article WHERE fatherarticle_id = @fatherId ORDER BY fathersort ASC',
+        { fatherId },
+      );
+      const usedSorts = new Set(existingSortsRes.rows.map((r) => Number(r.fathersort)));
+      let fathersort = 0;
+      while (usedSorts.has(fathersort)) {
+        fathersort++;
+      }
 
       // Create child article
       const rawTrack = options.track_stock ?? options.trackStock;
@@ -186,7 +230,11 @@ export default function addChild(provider) {
 
       // Create article text
       const childName = options.name?.trim() || `${fatherName} - ${finalValue}`;
-      const childSlug = slugify(childName);
+      const childSlug = await resolveSlug(runner, {
+        companyId,
+        languageId,
+        name: childName,
+      });
       await runner.query(createArticleTextSql, {
         articleId: childId,
         languageId,
@@ -194,13 +242,20 @@ export default function addChild(provider) {
         slug: childSlug,
       });
 
-      // History
+      // History on child
       await runner.query(insertHistorySql, {
         articleId: childId,
         companyuserId,
         text: `Artikel "${childName}" (${childSku}) als Variante von "${father.sku}" angelegt`,
       });
 
+      // History on father
+      await runner.query(insertHistorySql, {
+        articleId: fatherId,
+        companyuserId,
+        text: `Variante "${childName}" (${childSku}) hinzugefügt`,
+      });
+
       return load(googleAuthId, childSku, runner);
     };
 

src/store/article/createUnderParent.js

@@ -11,12 +11,13 @@ import resolveCategoryAccess from '../category/resolveCategoryAccess.js';
 import ensureDefaultUnit from '../unit/ensureDefault.js';
 import nextSku from '../numbers/nextSku.js';
 import makeRunner from '../runner.js';
-import slugify from '../slugify.js';
+import resolveUniqueSlug from './resolveUniqueSlug.js';
 
 export default function createUnderParent(provider) {
   const access = resolveCategoryAccess(provider);
   const ensureUnit = ensureDefaultUnit(provider);
   const allocateSku = nextSku(provider);
+  const resolveSlug = resolveUniqueSlug(provider);
   const isSqlite = provider?.dialect === 'sqlite3';
 
   const createArticleSql = isSqlite ? SQLITE_CREATE_ARTICLE : MSSQL_CREATE_ARTICLE;
@@ -53,7 +54,7 @@ export default function createUnderParent(provider) {
 
       const unitId = await ensureUnit(runner, languageId, companyId);
       const sku = await allocateSku(companyId, runner);
-      const slug = slugify(name);
+      const slug = await resolveSlug(runner, { companyId, languageId, name });
 
       let article;
       try {

src/store/article/delete.js

@@ -1,5 +1,7 @@
 import * as mssqlQueries from '../../providers/mssql/queries/articleDelete.js';
 import * as sqliteQueries from '../../providers/sqlite3/queries/articleDelete.js';
+import * as mssqlArticle from '../../providers/mssql/queries/article.js';
+import * as sqliteArticle from '../../providers/sqlite3/queries/article.js';
 import resolveArticleBySku from './resolveArticleBySku.js';
 import makeRunner from '../runner.js';
 
@@ -7,6 +9,7 @@ export default function del(provider) {
   const resolve = resolveArticleBySku(provider);
   const isSqlite = provider?.dialect === 'sqlite3';
   const queries = isSqlite ? sqliteQueries : mssqlQueries;
+  const articleQueries = isSqlite ? sqliteArticle : mssqlArticle;
 
   /**
    * Deletes an article by its SKU, refusing when it still has children unless cascade is true.
@@ -40,6 +43,8 @@ export default function del(provider) {
         const listIds = await runner.query(queries.GET_LIST_IDS, { articleId: id });
         const { articlelistId, optionslistId } = listIds.rows[0] ?? {};
 
+        await runner.query(queries.CREATE_TOMBSTONE, { articleId: id });
+
         await runner.query(queries.DELETE_PICS_BY_ARTICLE, { articleId: id });
 
         const deleted = await runner.query(queries.DELETE_BY_ID, { articleId: id });
@@ -64,16 +69,38 @@ export default function del(provider) {
         await deleteArticleAndLists(id);
       };
 
+      const fatherRes = await runner.query(
+        'SELECT fatherarticle_id FROM article WHERE id = @articleId',
+        { articleId },
+      );
+      const fatherArticleId = fatherRes.rows[0]?.fatherarticle_id;
+
       const childCount = await runner.query(queries.GET_CHILD_COUNT, { articleId });
       if (childCount.rows[0].count > 0) {
         if (!cascade) {
           throw new Error('Article has children');
         }
         await deleteSubtree(articleId);
-        return;
+      } else {
+        await deleteArticleAndLists(articleId);
       }
 
-      await deleteArticleAndLists(articleId);
+      if (fatherArticleId != null) {
+        const remainingChildrenRes = await runner.query(
+          'SELECT id, fathersort FROM article WHERE fatherarticle_id = @fatherArticleId ORDER BY fathersort ASC, id ASC',
+          { fatherArticleId },
+        );
+        for (let i = 0; i < remainingChildrenRes.rows.length; i++) {
+          const childRow = remainingChildrenRes.rows[i];
+          if (Number(childRow.fathersort) !== i) {
+            await runner.query(articleQueries.SET_FATHER_SORT, {
+              articleId: childRow.id,
+              fatherArticleId,
+              fathersort: i,
+            });
+          }
+        }
+      }
     };
 
     if (tx) {

src/store/article/getHistoryBySku.js

@@ -1,28 +1,50 @@
-import { LIST_BY_ARTICLE_ID as MSSQL_QUERY } from '../../providers/mssql/queries/articlehistory.js';
+import { LIST_BY_ARTICLE_ID as MSSQL_QUERY, LIST_BY_ARTICLE_ID_LIMITED as MSSQL_QUERY_LIMITED } from '../../providers/mssql/queries/articlehistory.js';
-import { LIST_BY_ARTICLE_ID as SQLITE_QUERY } from '../../providers/sqlite3/queries/articlehistory.js';
+import { LIST_BY_ARTICLE_ID as SQLITE_QUERY, LIST_BY_ARTICLE_ID_LIMITED as SQLITE_QUERY_LIMITED } from '../../providers/sqlite3/queries/articlehistory.js';
 import resolveArticleBySku from './resolveArticleBySku.js';
 import makeRunner from '../runner.js';
 
 export default function getHistoryBySku(provider) {
   const resolve = resolveArticleBySku(provider);
-  const sql = provider?.dialect === 'sqlite3' ? SQLITE_QUERY : MSSQL_QUERY;
+  const isSqlite = provider?.dialect === 'sqlite3';
+  const sql = isSqlite ? SQLITE_QUERY : MSSQL_QUERY;
+  const sqlLimited = isSqlite ? SQLITE_QUERY_LIMITED : MSSQL_QUERY_LIMITED;
 
   /**
    * Returns the change history of an article by its SKU.
    *
    * @param {number} googleAuthId - The id of the Google auth user.
    * @param {string} sku - The article SKU.
+   * @param {object} [opts] - Optional options.
+   * @param {number} [opts.limit] - Maximum number of entries to return (newest first).
    * @param {object} [tx] - Optional transaction.
    * @returns {Promise<Array<{id: number, companyuserId: number|null, date: string, text: string}>>} The article history entries.
    *
    * @example
    * const history = await store.article.getHistoryBySku(42, 'SKU-1');
    * // => [{ id, companyuserId, date, text }]
+   *
+   * const recent = await store.article.getHistoryBySku(42, 'SKU-1', { limit: 5 });
+   * // => up to 5 most recent entries
    */
-  return async (googleAuthId, sku, tx) => {
+  return async (googleAuthId, sku, opts, tx) => {
-    const { articleId } = await resolve(googleAuthId, sku, tx);
+    // Support legacy call signature: getHistoryBySku(googleAuthId, sku, tx)
-    const runner = makeRunner(provider, tx);
+    let limit = null;
-    const result = await runner.query(sql, { articleId });
+    let resolvedTx = tx;
+    if (opts != null && typeof opts === 'object' && !opts._isTx) {
+      limit = opts.limit != null ? Number(opts.limit) : null;
+    } else if (opts != null) {
+      resolvedTx = opts;
+    }
+
+    const runner = makeRunner(provider, resolvedTx);
+    const { articleId } = await resolve(googleAuthId, sku, runner);
+
+    let result;
+    if (limit != null && Number.isInteger(limit) && limit > 0) {
+      result = await runner.query(sqlLimited, { articleId, limit });
+    } else {
+      result = await runner.query(sql, { articleId });
+    }
 
     return result.rows.map((row) => ({
       id: row.id,
@@ -32,4 +54,3 @@ export default function getHistoryBySku(provider) {
     }));
   };
 }
-

src/store/article/importRows.js

@@ -30,7 +30,7 @@ import resolveSelectedCompanyAccess from '../companyuser/resolveSelectedCompanyA
 import ensureByPath from '../category/ensureByPath.js';
 import ensureDefaultUnit from '../unit/ensureDefault.js';
 import makeRunner from '../runner.js';
-import slugify from '../slugify.js';
+import resolveUniqueSlug from './resolveUniqueSlug.js';
 
 // Normalizes a numeric value that may arrive as a string using German decimal
 // notation (e.g. "11,00"), a JS number, or null/undefined. Returns null when empty.
@@ -49,6 +49,7 @@ export default function importRows(provider) {
   const companyAccess = resolveSelectedCompanyAccess(provider);
   const ensureUnit = ensureDefaultUnit(provider);
   const ensureCategoryByPath = ensureByPath(provider);
+  const resolveSlug = resolveUniqueSlug(provider);
   const isSqlite = provider?.dialect === 'sqlite3';
 
   const articleQueries = isSqlite ? sqliteArticle : mssqlArticle;
@@ -167,7 +168,7 @@ export default function importRows(provider) {
       try {
         await runInTx(async (runner) => {
           const unitId = await ensureUnit(runner, companyId, languageId);
-          const slug = slugify(name);
+          const slug = await resolveSlug(runner, { companyId, languageId, name });
 
           const rawTrack = row.track_stock ?? row.trackStock;
           const trackStock = rawTrack == null ? 1 : (rawTrack ? 1 : 0);
@@ -286,22 +287,52 @@ export default function importRows(provider) {
           const child = await runner.query(articleQueries.GET_ID_BY_SKU, { sku, companyId });
           const childId = child.rows[0]?.articleId;
           if (childId) {
-            const father = await runner.query(articleQueries.GET_ID_BY_SKU, { sku: fatherSku, companyId });
+            const father = await runner.query(
-            const fatherId = father.rows[0]?.articleId;
+              'SELECT id, is_father FROM article WHERE sku = @sku AND (@companyId IS NULL OR company_id = @companyId)',
+              { sku: fatherSku, companyId },
+            );
+            const fatherRow = father.rows[0];
+            const fatherId = fatherRow?.id;
             if (fatherId && fatherId !== childId) {
-              const childCount = await runner.query(getChildCountSql, {
+              const wasFather = Boolean(fatherRow.is_father);
-                articleId: fatherId,
+
-              });
+              const existingSortsRes = await runner.query(
-              const count = childCount.rows[0].count;
+                'SELECT fathersort FROM article WHERE fatherarticle_id = @fatherId ORDER BY fathersort ASC',
+                { fatherId },
+              );
+              const usedSorts = new Set(existingSortsRes.rows.map((r) => Number(r.fathersort)));
+              let fathersort = 0;
+              while (usedSorts.has(fathersort)) {
+                fathersort++;
+              }
               await runner.query(articleQueries.UPDATE_FATHER_BY_SKU, {
                 sku,
                 companyId,
                 fatherArticleId: fatherId,
-                fathersort: count,
+                fathersort,
               });
               await runner.query(articleQueries.SET_IS_FATHER, {
                 articleId: fatherId,
               });
+
+              if (!wasFather) {
+                await runner.query(insertHistorySql, {
+                  articleId: fatherId,
+                  companyuserId,
+                  text: 'Artikel zu Vaterartikel konvertiert',
+                });
+              }
+              const childName = String(row?.name ?? sku).trim();
+              await runner.query(insertHistorySql, {
+                articleId: fatherId,
+                companyuserId,
+                text: `Variante "${childName}" (${sku}) hinzugefügt`,
+              });
+              await runner.query(insertHistorySql, {
+                articleId: childId,
+                companyuserId,
+                text: `Artikel "${childName}" (${sku}) als Variante von "${fatherSku}" zugewiesen`,
+              });
             }
           }
         });

src/store/article/removeChild.js

@@ -28,7 +28,7 @@ export default function removeChild(provider) {
    */
   return async (googleAuthId, fatherSku, childSku, options = {}, tx) => {
     const run = async (runner) => {
-      const { articleId: fatherId, companyuserId } = await resolve(
+      const { articleId: fatherId, languageId, companyuserId } = await resolve(
         googleAuthId,
         fatherSku,
         runner,
@@ -45,9 +45,45 @@ export default function removeChild(provider) {
         throw new Error('Child article does not belong to this father');
       }
 
+      // Fetch child name before any deletion (needed for history regardless of path)
+      const childNameRes = await runner.query(
+        `SELECT at.name FROM articletext at
+         INNER JOIN article a ON a.id = at.article_id
+         WHERE a.id = @childId AND at.language_id = @languageId`,
+        { childId, languageId },
+      );
+      const childName = childNameRes.rows[0]?.name || childSku;
+
+      const recompactFatherSort = async () => {
+        const remainingChildrenRes = await runner.query(
+          'SELECT id, fathersort FROM article WHERE fatherarticle_id = @fatherId ORDER BY fathersort ASC, id ASC',
+          { fatherId },
+        );
+        for (let i = 0; i < remainingChildrenRes.rows.length; i++) {
+          const childRow = remainingChildrenRes.rows[i];
+          if (Number(childRow.fathersort) !== i) {
+            await runner.query(queries.SET_FATHER_SORT, {
+              articleId: childRow.id,
+              fatherArticleId: fatherId,
+              fathersort: i,
+            });
+          }
+        }
+      };
+
       if (options.deleteArticle) {
         const cascade = options.cascade !== undefined ? Boolean(options.cascade) : true;
         await del(googleAuthId, childSku, { cascade }, runner);
+
+        await recompactFatherSort();
+
+        // History on father (child article is gone so we can only log on father)
+        await runner.query(insertHistorySql, {
+          articleId: fatherId,
+          companyuserId,
+          text: `Variante "${childName}" (${childSku}) gelöscht`,
+        });
+
         return {
           success: true,
           fatherSku,
@@ -81,13 +117,22 @@ export default function removeChild(provider) {
         );
       }
 
-      // Add history
+      await recompactFatherSort();
+
+      // Add history on child
       await runner.query(insertHistorySql, {
         articleId: childId,
         companyuserId,
         text: `Artikel "${childSku}" von Vaterartikel "${fatherSku}" getrennt`,
       });
 
+      // Add history on father
+      await runner.query(insertHistorySql, {
+        articleId: fatherId,
+        companyuserId,
+        text: `Variante "${childName}" (${childSku}) getrennt`,
+      });
+
       return {
         success: true,
         fatherSku,

src/store/article/resolveUniqueSlug.js

@@ -0,0 +1,51 @@
+import { LIST_SLUGS_BY_COMPANY_AND_LANGUAGE as MSSQL_LIST_SLUGS } from '../../providers/mssql/queries/articletext.js';
+import { LIST_SLUGS_BY_COMPANY_AND_LANGUAGE as SQLITE_LIST_SLUGS } from '../../providers/sqlite3/queries/articletext.js';
+import slugify from '../slugify.js';
+
+export default function resolveUniqueSlug(provider) {
+  const isSqlite = provider?.dialect === 'sqlite3';
+  const listSlugsSql = isSqlite ? SQLITE_LIST_SLUGS : MSSQL_LIST_SLUGS;
+
+  /**
+   * Resolves a company- and language-unique slug for an article.
+   * Disambiguates duplicate slugs with a numeric suffix (-2, -3, ...).
+   *
+   * @param {object} runner - DB runner or tx.
+   * @param {object} params
+   * @param {number} params.companyId - The company ID.
+   * @param {number} params.languageId - The language ID.
+   * @param {string} params.name - The article name.
+   * @param {number} [params.excludeArticleId] - Optional article ID to exclude (e.g. for updates).
+   * @returns {Promise<string>} The unique slug.
+   */
+  return async (runner, { companyId, languageId, name, excludeArticleId }) => {
+    const baseSlug = slugify(name) || 'article';
+    const likePattern = `${baseSlug}-%`;
+
+    const res = await runner.query(listSlugsSql, {
+      companyId,
+      languageId,
+      baseSlug,
+      likePattern,
+    });
+
+    const existingSlugs = new Set();
+    for (const row of res.rows) {
+      const artId = row.articleId ?? row.article_id;
+      if (excludeArticleId != null && artId === excludeArticleId) {
+        continue;
+      }
+      existingSlugs.add(row.slug);
+    }
+
+    if (!existingSlugs.has(baseSlug)) {
+      return baseSlug;
+    }
+
+    let suffix = 2;
+    while (existingSlugs.has(`${baseSlug}-${suffix}`)) {
+      suffix++;
+    }
+    return `${baseSlug}-${suffix}`;
+  };
+}

src/store/article/setBrandIdBySku.js

@@ -47,25 +47,29 @@ export default function setBrandIdBySku(provider) {
       throw new Error('Invalid brandId');
     }
 
-    // Read old brand for history
+    // Read old brand name (null = no brand assigned)
     const oldBrandRes = await runner.query(
       `SELECT b.name FROM article a LEFT JOIN brand b ON b.id = a.brand_id WHERE a.id = @articleId`,
       { articleId },
     );
-    const oldBrandName = oldBrandRes.rows[0]?.name ?? '';
+    const oldBrandName = oldBrandRes.rows[0]?.name ?? null;
 
     let resolvedBrandId = null;
-    let newBrandName = '';
+    let newBrandName = null;
     if (brandId !== null) {
-      const brand = await runner.query(getBrandSql, {
+      // Verify brand belongs to this company
-        brandId,
+      const brandCheck = await runner.query(getBrandSql, { brandId, companyId });
-        companyId,
+      if (!brandCheck.rows[0]) {
-      });
-      if (!brand.rows[0]) {
         throw new Error('Brand not found');
       }
       resolvedBrandId = brandId;
-      newBrandName = brand.rows[0].name ?? '';
+
+      // GET_BRAND_BY_COMPANY_AND_ID only selects `id`, so fetch name separately
+      const brandNameRes = await runner.query(
+        'SELECT name FROM brand WHERE id = @brandId',
+        { brandId },
+      );
+      newBrandName = brandNameRes.rows[0]?.name ?? null;
     }
 
     const result = await runner.query(updateBrandSql, {
@@ -77,12 +81,12 @@ export default function setBrandIdBySku(provider) {
       throw new Error('Article not found');
     }
 
-    // Write history if brand changed
+    // null = no brand; treat as distinct sentinel so first assignment is logged
     if (oldBrandName !== newBrandName) {
       await runner.query(insertHistorySql, {
         articleId,
         companyuserId,
-        text: `Marke geändert von "${oldBrandName}" auf "${newBrandName}"`,
+        text: `Marke ge\u00e4ndert von "${oldBrandName ?? ''}" auf "${newBrandName ?? ''}"`,
       });
     }
 
@@ -94,4 +98,3 @@ export default function setBrandIdBySku(provider) {
     return article;
   };
 }
-

src/store/article/setFatherBySku.js

@@ -2,6 +2,8 @@ import * as mssqlArticle from '../../providers/mssql/queries/article.js';
 import * as sqliteArticle from '../../providers/sqlite3/queries/article.js';
 import { GET_CHILD_COUNT as MSSQL_GET_CHILD_COUNT } from '../../providers/mssql/queries/articleDelete.js';
 import { GET_CHILD_COUNT as SQLITE_GET_CHILD_COUNT } from '../../providers/sqlite3/queries/articleDelete.js';
+import { INSERT as MSSQL_INSERT_HISTORY } from '../../providers/mssql/queries/articlehistory.js';
+import { INSERT as SQLITE_INSERT_HISTORY } from '../../providers/sqlite3/queries/articlehistory.js';
 import queryBySku from './queryBySku.js';
 import resolveArticleBySku from './resolveArticleBySku.js';
 import makeRunner from '../runner.js';
@@ -13,6 +15,7 @@ export default function setFatherBySku(provider) {
 
   const queries = isSqlite ? sqliteArticle : mssqlArticle;
   const getChildCountSql = isSqlite ? SQLITE_GET_CHILD_COUNT : MSSQL_GET_CHILD_COUNT;
+  const insertHistorySql = isSqlite ? SQLITE_INSERT_HISTORY : MSSQL_INSERT_HISTORY;
 
   /**
    * Links an article to a father article (V/K compound) by their SKUs.
@@ -30,14 +33,47 @@ export default function setFatherBySku(provider) {
    */
   return async (googleAuthId, sku, fatherSku, tx) => {
     const runSet = async (runner) => {
-      const { articleId, languageId, companyId } = await resolve(googleAuthId, sku, runner);
+      const { articleId, languageId, companyId, companyuserId } = await resolve(googleAuthId, sku, runner);
+
+      const childTextRes = await runner.query(
+        'SELECT name FROM articletext WHERE article_id = @articleId AND language_id = @languageId',
+        { articleId, languageId },
+      );
+      const childName = childTextRes.rows[0]?.name || sku;
 
       if (fatherSku == null || fatherSku === '') {
+        const prevFatherRes = await runner.query(
+          'SELECT fatherarticle_id FROM article WHERE id = @articleId',
+          { articleId },
+        );
+        const prevFatherId = prevFatherRes.rows[0]?.fatherarticle_id;
+
         await runner.query(queries.UPDATE_FATHER_BY_SKU, {
           sku,
           companyId,
           fatherArticleId: null,
         });
+
+        if (prevFatherId) {
+          const prevFatherTextRes = await runner.query(
+            'SELECT sku FROM article WHERE id = @prevFatherId',
+            { prevFatherId },
+          );
+          const prevFatherSku = prevFatherTextRes.rows[0]?.sku || String(prevFatherId);
+
+          await runner.query(insertHistorySql, {
+            articleId,
+            companyuserId,
+            text: `Artikel "${sku}" von Vaterartikel "${prevFatherSku}" getrennt`,
+          });
+
+          await runner.query(insertHistorySql, {
+            articleId: prevFatherId,
+            companyuserId,
+            text: `Variante "${childName}" (${sku}) getrennt`,
+          });
+        }
+
         const unlinked = await load(articleId, languageId, runner);
         if (!unlinked) {
           throw new Error('Article not found');
@@ -45,8 +81,12 @@ export default function setFatherBySku(provider) {
         return unlinked;
       }
 
-      const father = await runner.query(queries.GET_ID_BY_SKU, { sku: fatherSku, companyId });
+      const father = await runner.query(
-      const fatherId = father.rows[0]?.articleId;
+        'SELECT id, is_father, sku FROM article WHERE sku = @sku AND (@companyId IS NULL OR company_id = @companyId)',
+        { sku: fatherSku, companyId },
+      );
+      const fatherRow = father.rows[0];
+      const fatherId = fatherRow?.id;
       if (!fatherId) {
         throw new Error('Father not found');
       }
@@ -54,22 +94,49 @@ export default function setFatherBySku(provider) {
         throw new Error('Invalid father');
       }
 
-      const childCount = await runner.query(getChildCountSql, {
+      const wasFather = Boolean(fatherRow.is_father);
-        articleId: fatherId,
+
-      });
+      const existingSortsRes = await runner.query(
-      const count = childCount.rows[0].count;
+        'SELECT fathersort FROM article WHERE fatherarticle_id = @fatherId ORDER BY fathersort ASC',
+        { fatherId },
+      );
+      const usedSorts = new Set(existingSortsRes.rows.map((r) => Number(r.fathersort)));
+      let fathersort = 0;
+      while (usedSorts.has(fathersort)) {
+        fathersort++;
+      }
 
       await runner.query(queries.UPDATE_FATHER_BY_SKU, {
         sku,
         companyId,
         fatherArticleId: fatherId,
-        fathersort: count,
+        fathersort,
       });
 
       await runner.query(queries.SET_IS_FATHER, {
         articleId: fatherId,
       });
 
+      if (!wasFather) {
+        await runner.query(insertHistorySql, {
+          articleId: fatherId,
+          companyuserId,
+          text: 'Artikel zu Vaterartikel konvertiert',
+        });
+      }
+
+      await runner.query(insertHistorySql, {
+        articleId: fatherId,
+        companyuserId,
+        text: `Variante "${childName}" (${sku}) hinzugefügt`,
+      });
+
+      await runner.query(insertHistorySql, {
+        articleId,
+        companyuserId,
+        text: `Artikel "${sku}" als Variante von "${fatherSku}" zugewiesen`,
+      });
+
       const article = await load(articleId, languageId, runner);
       if (!article) {
         throw new Error('Article not found');

src/store/article/updateBySku.js

@@ -11,7 +11,7 @@ import { GET_FULL_BY_SI as SQLITE_GET_UNIT } from '../../providers/sqlite3/queri
 import queryBySku from './queryBySku.js';
 import resolveArticleBySku from './resolveArticleBySku.js';
 import makeRunner from '../runner.js';
-import slugify from '../slugify.js';
+import resolveUniqueSlug from './resolveUniqueSlug.js';
 
 function formatUnitLabel(amount, symbol) {
   const sym = symbol ?? '';
@@ -24,6 +24,7 @@ function formatUnitLabel(amount, symbol) {
 export default function updateBySku(provider) {
   const resolve = resolveArticleBySku(provider);
   const load = queryBySku(provider);
+  const resolveSlug = resolveUniqueSlug(provider);
   const isSqlite = provider?.dialect === 'sqlite3';
 
   const articleQueries = isSqlite ? sqliteArticle : mssqlArticle;
@@ -144,7 +145,12 @@ export default function updateBySku(provider) {
       }
 
       if (hasName) {
-        const slug = slugify(patch.name);
+        const slug = await resolveSlug(runner, {
+          companyId,
+          languageId,
+          name: patch.name,
+          excludeArticleId: articleId,
+        });
         const update = await runner.query(updateTextSql, {
           articleId,
           languageId,

src/store/articleattributevalue/setByArticleSku.js

@@ -44,7 +44,7 @@ export default function setByArticleSku(provider) {
         `SELECT aav.attributevalue_id AS attributeValueId, an.name AS attributeName, av.value
          FROM articleattributevalue aav
          INNER JOIN attributevalue av ON av.id = aav.attributevalue_id
-         INNER JOIN attributename an ON an.id = av.attributename_id
+         INNER JOIN attributename an ON an.id = av.attribute_id
          WHERE aav.article_id = @articleId
          ORDER BY aav.sort ASC, aav.id ASC`,
         { articleId },
@@ -57,7 +57,36 @@ export default function setByArticleSku(provider) {
 
       for (let i = 0; i < values.length; i++) {
         const item = values[i];
-        const valId = typeof item === 'object' && item !== null ? Number(item.attributeValueId) : Number(item);
+        let rawId;
+        if (typeof item === 'object' && item !== null) {
+          rawId = item.attributeValueId ?? item.attributevalueId ?? item.attribute_value_id ?? item.valueId ?? item.id;
+        } else {
+          rawId = item;
+        }
+        let valId = Number(rawId);
+
+        if ((!Number.isInteger(valId) || valId <= 0) && typeof item === 'object' && item !== null && typeof item.value === 'string' && item.value.trim()) {
+          const valStr = item.value.trim();
+          let targetAttrId = item.attributeId != null ? Number(item.attributeId) : null;
+          if (!targetAttrId && (item.attributeName || item.name)) {
+            const attrName = String(item.attributeName || item.name).trim();
+            const nameRes = await runner.query(
+              'SELECT id FROM attributename WHERE company_id = @companyId AND name = @attrName',
+              { companyId, attrName },
+            );
+            targetAttrId = nameRes.rows[0]?.id;
+          }
+          if (targetAttrId) {
+            const valRes = await runner.query(
+              'SELECT id FROM attributevalue WHERE attribute_id = @attributeId AND value = @value',
+              { attributeId: targetAttrId, value: valStr },
+            );
+            if (valRes.rows[0]?.id) {
+              valId = valRes.rows[0].id;
+            }
+          }
+        }
+
         if (!Number.isInteger(valId) || valId <= 0) {
           throw new Error('Invalid attributeValueId');
         }
@@ -80,8 +109,8 @@ export default function setByArticleSku(provider) {
           exclusiveAttributesSeen.set(detail.attributeId, detail.attributeName);
         }
 
-        const sort = typeof item === 'object' && item !== null && item.sort != null && Number.isInteger(item.sort)
+        const sort = typeof item === 'object' && item !== null && (item.sort != null || item.sort_order != null) && Number.isInteger(Number(item.sort ?? item.sort_order))
-          ? item.sort
+          ? Number(item.sort ?? item.sort_order)
           : i;
 
         validated.push({

src/store/articleproperty/delete.js

@@ -4,12 +4,16 @@ import {
 import {
   DELETE_BY_ARTICLE_AND_PROPERTY_ID as SQLITE_DELETE,
 } from '../../providers/sqlite3/queries/articleproperty.js';
+import { INSERT as MSSQL_INSERT_HISTORY } from '../../providers/mssql/queries/articlehistory.js';
+import { INSERT as SQLITE_INSERT_HISTORY } from '../../providers/sqlite3/queries/articlehistory.js';
 import resolveArticleBySku from '../article/resolveArticleBySku.js';
 import makeRunner from '../runner.js';
 
 export default function deleteArticleProperty(provider) {
   const resolve = resolveArticleBySku(provider);
-  const deleteSql = provider?.dialect === 'sqlite3' ? SQLITE_DELETE : MSSQL_DELETE;
+  const isSqlite = provider?.dialect === 'sqlite3';
+  const deleteSql = isSqlite ? SQLITE_DELETE : MSSQL_DELETE;
+  const insertHistorySql = isSqlite ? SQLITE_INSERT_HISTORY : MSSQL_INSERT_HISTORY;
 
   /**
    * Deletes a property from an article by SKU and propertyId.
@@ -22,7 +26,26 @@ export default function deleteArticleProperty(provider) {
    */
   return async (googleAuthId, sku, propertyId, tx) => {
     const runner = makeRunner(provider, tx);
-    const { articleId } = await resolve(googleAuthId, sku, runner);
+    const { articleId, companyuserId } = await resolve(googleAuthId, sku, runner);
+
+    // Read the property name + value before deleting (for the history entry)
+    const propRes = await runner.query(
+      `SELECT ap.value, pn.name
+       FROM articleproperty ap
+       INNER JOIN propertyname pn ON pn.id = ap.property_id
+       WHERE ap.article_id = @articleId AND ap.property_id = @propertyId`,
+      { articleId, propertyId },
+    );
+    const prop = propRes.rows[0];
+
     await runner.query(deleteSql, { articleId, propertyId });
+
+    if (prop) {
+      await runner.query(insertHistorySql, {
+        articleId,
+        companyuserId,
+        text: `Eigenschaft "${prop.name}" (${prop.value}) gelöscht`,
+      });
+    }
   };
 }

src/store/categoryattributevalue/listByCategoryId.js

@@ -0,0 +1,34 @@
+import { LIST_BY_CATEGORY_ID as MSSQL_QUERY } from '../../providers/mssql/queries/categoryattributevalue.js';
+import { LIST_BY_CATEGORY_ID as SQLITE_QUERY } from '../../providers/sqlite3/queries/categoryattributevalue.js';
+import resolveCategoryAccess from '../category/resolveCategoryAccess.js';
+import makeRunner from '../runner.js';
+
+export default function listByCategoryId(provider) {
+  const resolve = resolveCategoryAccess(provider);
+  const sql = provider?.dialect === 'sqlite3' ? SQLITE_QUERY : MSSQL_QUERY;
+
+  /**
+   * Lists the attribute values assigned to a category by its ID.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {number} categoryId - The category ID.
+   * @param {object} [tx] - Optional transaction.
+   * @returns {Promise<Array<{id: number, categoryId: number, attributeId: number, attributeName: string, exclusive: boolean, attributeValueId: number, value: string, sort: number}>>}
+   */
+  return async (googleAuthId, categoryId, tx) => {
+    const runner = makeRunner(provider, tx);
+    await resolve(googleAuthId, categoryId, runner);
+
+    const result = await runner.query(sql, { categoryId });
+    return result.rows.map((row) => ({
+      id: row.id,
+      categoryId: row.categoryId,
+      attributeId: row.attributeId,
+      attributeName: row.attributeName,
+      exclusive: Boolean(row.exclusive),
+      attributeValueId: row.attributeValueId,
+      value: row.value,
+      sort: row.sort,
+    }));
+  };
+}

src/store/categoryattributevalue/setByCategoryId.js

@@ -0,0 +1,155 @@
+import {
+  DELETE_BY_CATEGORY_ID as MSSQL_DELETE,
+  INSERT_ROW as MSSQL_INSERT,
+  GET_VALUE_DETAIL as MSSQL_GET_DETAIL,
+} from '../../providers/mssql/queries/categoryattributevalue.js';
+import {
+  DELETE_BY_CATEGORY_ID as SQLITE_DELETE,
+  INSERT_ROW as SQLITE_INSERT,
+  GET_VALUE_DETAIL as SQLITE_GET_DETAIL,
+} from '../../providers/sqlite3/queries/categoryattributevalue.js';
+import resolveCategoryAccess from '../category/resolveCategoryAccess.js';
+import makeRunner from '../runner.js';
+
+export default function setByCategoryId(provider) {
+  const resolve = resolveCategoryAccess(provider);
+  const isSqlite = provider?.dialect === 'sqlite3';
+  const deleteSql = isSqlite ? SQLITE_DELETE : MSSQL_DELETE;
+  const insertSql = isSqlite ? SQLITE_INSERT : MSSQL_INSERT;
+  const getDetailSql = isSqlite ? SQLITE_GET_DETAIL : MSSQL_GET_DETAIL;
+
+  /**
+   * Replaces all attribute values for a category by its ID.
+   * Validates company ownership and enforces the `exclusive` flag on attributes.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {number} categoryId - The category ID.
+   * @param {Array<number|{attributeValueId: number, sort?: number}>} values - Attribute value IDs or items.
+   * @param {object} [tx] - Optional transaction.
+   * @returns {Promise<Array<{id: number, categoryId: number, attributeId: number, attributeName: string, exclusive: boolean, attributeValueId: number, value: string, sort: number}>>}
+   */
+  return async (googleAuthId, categoryId, values = [], tx) => {
+    if (!Array.isArray(values)) {
+      throw new Error('Invalid attribute values array');
+    }
+
+    const runSet = async (runner) => {
+      const { companyId } = await resolve(googleAuthId, categoryId, runner);
+
+      const validated = [];
+      const seenValues = new Set();
+      const exclusiveAttributesSeen = new Map(); // attributeId -> attributeName
+
+      for (let i = 0; i < values.length; i++) {
+        const item = values[i];
+        let rawId;
+        if (typeof item === 'object' && item !== null) {
+          rawId = item.attributeValueId ?? item.attributevalueId ?? item.attribute_value_id ?? item.valueId ?? item.id;
+        } else {
+          rawId = item;
+        }
+        let valId = Number(rawId);
+
+        if ((!Number.isInteger(valId) || valId <= 0) && typeof item === 'object' && item !== null && typeof item.value === 'string' && item.value.trim()) {
+          const valStr = item.value.trim();
+          let targetAttrId = item.attributeId != null ? Number(item.attributeId) : null;
+          if (!targetAttrId && (item.attributeName || item.name)) {
+            const attrName = String(item.attributeName || item.name).trim();
+            const nameRes = await runner.query(
+              'SELECT id FROM attributename WHERE company_id = @companyId AND name = @attrName',
+              { companyId, attrName },
+            );
+            targetAttrId = nameRes.rows[0]?.id;
+          }
+          if (targetAttrId) {
+            const valRes = await runner.query(
+              'SELECT id FROM attributevalue WHERE attribute_id = @targetAttrId AND value = @valStr',
+              { targetAttrId, valStr },
+            );
+            if (valRes.rows[0]?.id) {
+              valId = valRes.rows[0].id;
+            }
+          }
+        }
+
+        if (!Number.isInteger(valId) || valId <= 0) {
+          throw new Error(`Invalid attributeValueId at index ${i}`);
+        }
+
+        if (seenValues.has(valId)) {
+          continue; // de-duplicate identical value assignments
+        }
+        seenValues.add(valId);
+
+        const detailRes = await runner.query(getDetailSql, { attributeValueId: valId });
+        const detail = detailRes.rows[0];
+        if (!detail) {
+          throw new Error(`Attribute value not found: ${valId}`);
+        }
+        if (detail.companyId !== companyId) {
+          throw new Error(`Attribute value does not belong to company: ${valId}`);
+        }
+
+        const isExclusive = Boolean(detail.exclusive);
+        if (isExclusive) {
+          if (exclusiveAttributesSeen.has(detail.attributeId)) {
+            const attrName = exclusiveAttributesSeen.get(detail.attributeId);
+            throw new Error(`Attribute "${attrName}" is exclusive and can only have one value`);
+          }
+          exclusiveAttributesSeen.set(detail.attributeId, detail.attributeName);
+        }
+
+        const sort = typeof item === 'object' && item !== null && item.sort != null && Number.isInteger(item.sort)
+          ? item.sort
+          : i;
+
+        validated.push({
+          attributeValueId: valId,
+          attributeId: detail.attributeId,
+          attributeName: detail.attributeName,
+          exclusive: isExclusive,
+          value: detail.value,
+          sort,
+        });
+      }
+
+      await runner.query(deleteSql, { categoryId });
+
+      const inserted = [];
+      for (const item of validated) {
+        const res = await runner.query(insertSql, {
+          categoryId,
+          attributeValueId: item.attributeValueId,
+          sort: item.sort,
+        });
+        const id = res.rows[0]?.id ?? res.insertId;
+        inserted.push({
+          id,
+          categoryId,
+          attributeId: item.attributeId,
+          attributeName: item.attributeName,
+          exclusive: item.exclusive,
+          attributeValueId: item.attributeValueId,
+          value: item.value,
+          sort: item.sort,
+        });
+      }
+
+      // Touch category updated_at
+      const touchSql = isSqlite
+        ? "UPDATE category SET updated_at = strftime('%Y-%m-%dT%H:%M:%fZ', 'now') WHERE id = @categoryId"
+        : 'UPDATE category SET updated_at = SYSUTCDATETIME() WHERE id = @categoryId';
+      await runner.query(touchSql, { categoryId });
+
+      return inserted;
+    };
+
+    if (tx) {
+      return runSet(makeRunner(provider, tx));
+    }
+    if (typeof provider?.transaction === 'function') {
+      return provider.transaction(runSet);
+    }
+    return runSet(makeRunner(provider));
+  };
+}

src/store/categoryproperty/delete.js

@@ -0,0 +1,36 @@
+import {
+  DELETE_BY_CATEGORY_AND_PROPERTY_ID as MSSQL_DELETE,
+} from '../../providers/mssql/queries/categoryproperty.js';
+import {
+  DELETE_BY_CATEGORY_AND_PROPERTY_ID as SQLITE_DELETE,
+} from '../../providers/sqlite3/queries/categoryproperty.js';
+import resolveCategoryAccess from '../category/resolveCategoryAccess.js';
+import makeRunner from '../runner.js';
+
+export default function deleteCategoryProperty(provider) {
+  const resolve = resolveCategoryAccess(provider);
+  const isSqlite = provider?.dialect === 'sqlite3';
+  const deleteSql = isSqlite ? SQLITE_DELETE : MSSQL_DELETE;
+
+  /**
+   * Deletes a property from a category by categoryId and propertyId.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {number} categoryId - The category ID.
+   * @param {number} propertyId - The property id.
+   * @param {object} [tx] - Optional transaction.
+   * @returns {Promise<void>}
+   */
+  return async (googleAuthId, categoryId, propertyId, tx) => {
+    const runner = makeRunner(provider, tx);
+    await resolve(googleAuthId, categoryId, runner);
+
+    await runner.query(deleteSql, { categoryId, propertyId });
+
+    // Touch category updated_at
+    const touchSql = isSqlite
+      ? "UPDATE category SET updated_at = strftime('%Y-%m-%dT%H:%M:%fZ', 'now') WHERE id = @categoryId"
+      : 'UPDATE category SET updated_at = SYSUTCDATETIME() WHERE id = @categoryId';
+    await runner.query(touchSql, { categoryId });
+  };
+}

src/store/categoryproperty/listByCategoryId.js

@@ -0,0 +1,33 @@
+import { LIST_BY_CATEGORY_ID as MSSQL_QUERY } from '../../providers/mssql/queries/categoryproperty.js';
+import { LIST_BY_CATEGORY_ID as SQLITE_QUERY } from '../../providers/sqlite3/queries/categoryproperty.js';
+import resolveCategoryAccess from '../category/resolveCategoryAccess.js';
+import makeRunner from '../runner.js';
+
+export default function listByCategoryId(provider) {
+  const resolve = resolveCategoryAccess(provider);
+  const sql = provider?.dialect === 'sqlite3' ? SQLITE_QUERY : MSSQL_QUERY;
+
+  /**
+   * Lists the properties of a category by its ID.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {number} categoryId - The category ID.
+   * @param {object} [tx] - Optional transaction.
+   * @returns {Promise<Array<{id: number, categoryId: number, propertyId: number, name: string, exclusive: boolean, value: string, sort: number}>>}
+   */
+  return async (googleAuthId, categoryId, tx) => {
+    const runner = makeRunner(provider, tx);
+    await resolve(googleAuthId, categoryId, runner);
+
+    const result = await runner.query(sql, { categoryId });
+    return result.rows.map((row) => ({
+      id: row.id,
+      categoryId: row.categoryId,
+      propertyId: row.propertyId,
+      name: row.name,
+      exclusive: Boolean(row.exclusive),
+      value: row.value,
+      sort: row.sort,
+    }));
+  };
+}

src/store/categoryproperty/setByCategoryId.js

@@ -0,0 +1,117 @@
+import {
+  DELETE_BY_CATEGORY_ID as MSSQL_DELETE,
+  INSERT_ROW as MSSQL_INSERT,
+} from '../../providers/mssql/queries/categoryproperty.js';
+import {
+  DELETE_BY_CATEGORY_ID as SQLITE_DELETE,
+  INSERT_ROW as SQLITE_INSERT,
+} from '../../providers/sqlite3/queries/categoryproperty.js';
+import {
+  GET_BY_COMPANY_AND_ID as MSSQL_GET_PROP,
+} from '../../providers/mssql/queries/propertyname.js';
+import {
+  GET_BY_COMPANY_AND_ID as SQLITE_GET_PROP,
+} from '../../providers/sqlite3/queries/propertyname.js';
+import resolveCategoryAccess from '../category/resolveCategoryAccess.js';
+import makeRunner from '../runner.js';
+
+export default function setByCategoryId(provider) {
+  const resolve = resolveCategoryAccess(provider);
+  const isSqlite = provider?.dialect === 'sqlite3';
+  const deleteSql = isSqlite ? SQLITE_DELETE : MSSQL_DELETE;
+  const insertSql = isSqlite ? SQLITE_INSERT : MSSQL_INSERT;
+  const getPropSql = isSqlite ? SQLITE_GET_PROP : MSSQL_GET_PROP;
+
+  /**
+   * Replaces all properties for a category by its ID.
+   * Enforces exclusive flag on property names.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {number} categoryId - The category ID.
+   * @param {Array<{propertyId: number, value: string, sort?: number}>} properties - The properties to set.
+   * @param {object} [tx] - Optional transaction.
+   * @returns {Promise<Array<{id: number, categoryId: number, propertyId: number, name: string, exclusive: boolean, value: string, sort: number}>>}
+   */
+  return async (googleAuthId, categoryId, properties = [], tx) => {
+    if (!Array.isArray(properties)) {
+      throw new Error('Invalid properties array');
+    }
+
+    const runSet = async (runner) => {
+      const { companyId } = await resolve(googleAuthId, categoryId, runner);
+
+      const validated = [];
+      const seenExclusiveProps = new Set();
+
+      for (let i = 0; i < properties.length; i++) {
+        const item = properties[i];
+        const propertyId = Number(item.propertyId);
+        if (!Number.isInteger(propertyId) || propertyId <= 0) {
+          throw new Error('Invalid propertyId');
+        }
+
+        const propRes = await runner.query(getPropSql, { id: propertyId, companyId });
+        const prop = propRes.rows[0];
+        if (!prop) {
+          throw new Error(`Property not found: ${propertyId}`);
+        }
+
+        const isExclusive = Boolean(prop.exclusive);
+        if (isExclusive) {
+          if (seenExclusiveProps.has(propertyId)) {
+            throw new Error(`Property "${prop.name}" is exclusive and can only have one value`);
+          }
+          seenExclusiveProps.add(propertyId);
+        }
+
+        const value = item.value != null ? String(item.value).trim() : '';
+        const sort = item.sort != null && Number.isInteger(item.sort) ? item.sort : i;
+        validated.push({
+          propertyId,
+          name: prop.name,
+          exclusive: isExclusive,
+          value,
+          sort,
+        });
+      }
+
+      await runner.query(deleteSql, { categoryId });
+
+      const inserted = [];
+      for (const item of validated) {
+        const res = await runner.query(insertSql, {
+          categoryId,
+          propertyId: item.propertyId,
+          value: item.value,
+          sort: item.sort,
+        });
+        const id = res.rows[0]?.id ?? res.insertId;
+        inserted.push({
+          id,
+          categoryId,
+          propertyId: item.propertyId,
+          name: item.name,
+          exclusive: item.exclusive,
+          value: item.value,
+          sort: item.sort,
+        });
+      }
+
+      // Touch category updated_at
+      const touchSql = isSqlite
+        ? "UPDATE category SET updated_at = strftime('%Y-%m-%dT%H:%M:%fZ', 'now') WHERE id = @categoryId"
+        : 'UPDATE category SET updated_at = SYSUTCDATETIME() WHERE id = @categoryId';
+      await runner.query(touchSql, { categoryId });
+
+      return inserted;
+    };
+
+    if (tx) {
+      return runSet(makeRunner(provider, tx));
+    }
+    if (typeof provider?.transaction === 'function') {
+      return provider.transaction(runSet);
+    }
+    return runSet(makeRunner(provider));
+  };
+}

src/store/manifestLines.js

@@ -1,5 +1,11 @@
-import { CREATE_LINE as MSSQL_CREATE_LINE } from '../providers/mssql/queries/manifestDoc.js';
+import {
-import { CREATE_LINE as SQLITE_CREATE_LINE } from '../providers/sqlite3/queries/manifestDoc.js';
+  CHECK_ARTICLE_IS_FATHER as MSSQL_CHECK_ARTICLE_IS_FATHER,
+  CREATE_LINE as MSSQL_CREATE_LINE,
+} from '../providers/mssql/queries/manifestDoc.js';
+import {
+  CHECK_ARTICLE_IS_FATHER as SQLITE_CHECK_ARTICLE_IS_FATHER,
+  CREATE_LINE as SQLITE_CREATE_LINE,
+} from '../providers/sqlite3/queries/manifestDoc.js';
 import makeRunner from './runner.js';
 
 /**
@@ -24,7 +30,7 @@ export function normalizeLines(lines) {
     }
 
     const pu =
-      entry?.pu === undefined || entry?.pu === null ? 1 : entry.pu;
+      entry?.pu === undefined || entry?.pu === null ? null : entry.pu;
     const amount = entry?.amount;
     const net = entry?.net;
     const rebate =
@@ -36,7 +42,7 @@ export function normalizeLines(lines) {
         : String(entry.comment);
 
     if (
-      typeof pu !== 'number' || !Number.isFinite(pu) || pu <= 0 ||
+      (pu !== null && (typeof pu !== 'number' || !Number.isFinite(pu) || pu <= 0)) ||
       typeof amount !== 'number' || !Number.isFinite(amount) ||
       typeof net !== 'number' || !Number.isFinite(net) ||
       typeof rebate !== 'number' || !Number.isFinite(rebate) ||
@@ -116,8 +122,32 @@ export async function insertLines(
   const { manifestId, lines, ensureTax } = params;
   const isSqlite = runner?.dialect === 'sqlite3';
   const createLineSql = isSqlite ? SQLITE_CREATE_LINE : MSSQL_CREATE_LINE;
+  const checkFatherSql = isSqlite ? SQLITE_CHECK_ARTICLE_IS_FATHER : MSSQL_CHECK_ARTICLE_IS_FATHER;
 
   for (const line of lines) {
+    let resolvedName = line.name;
+    let resolvedPu = line.pu;
+
+    if (line.sku) {
+      const fatherCheck = await runner.query(checkFatherSql, {
+        manifestId,
+        sku: line.sku,
+      });
+      const art = fatherCheck.rows[0];
+      if (art?.isFather) {
+        throw new Error(`A father article cannot be booked on documents (${line.sku})`);
+      }
+      if (!resolvedName && art?.articleName) {
+        resolvedName = art.articleName;
+      }
+      if (resolvedPu == null && art?.pu != null) {
+        resolvedPu = art.pu;
+      }
+    }
+
+    resolvedName = resolvedName || line.sku || null;
+    resolvedPu = resolvedPu ?? 1;
+
     if (ensureTax) {
       await ensureTax(line.taxrate, runner);
     }
@@ -125,8 +155,8 @@ export async function insertLines(
     await runner.query(createLineSql, {
       manifestId,
       sku: line.sku ?? null,
-      name: line.name ?? null,
+      name: resolvedName,
-      pu: line.pu ?? 1,
+      pu: resolvedPu,
       amount: line.amount,
       net: line.net,
       comment: line.comment,

src/store/posterminal/setMaxKnownTombstoneId.js

@@ -0,0 +1,27 @@
+import { SET_MAX_KNOWN_TOMBSTONE_ID as MSSQL_SET } from '../../providers/mssql/queries/posterminal.js';
+import { SET_MAX_KNOWN_TOMBSTONE_ID as SQLITE_SET } from '../../providers/sqlite3/queries/posterminal.js';
+import makeRunner from '../runner.js';
+
+export default function setMaxKnownTombstoneId(provider) {
+  const sql = provider?.dialect === 'sqlite3' ? SQLITE_SET : MSSQL_SET;
+
+  /**
+   * Updates the max known tombstone ID for a POS terminal.
+   *
+   * @param {number} id - The posterminal id.
+   * @param {number|null} maxknowntombstoneid - The highest synced tombstone ID.
+   * @param {object} [tx] - Optional transaction to run within.
+   * @returns {Promise<{id: number, maxknowntombstoneid: number|null}>}
+   */
+  return async (id, maxknowntombstoneid, tx) => {
+    await makeRunner(provider, tx).query(sql, {
+      id,
+      maxknowntombstoneid: maxknowntombstoneid != null ? Number(maxknowntombstoneid) : null,
+    });
+
+    return {
+      id,
+      maxknowntombstoneid: maxknowntombstoneid != null ? Number(maxknowntombstoneid) : null,
+    };
+  };
+}

src/store/posterminal/upsert.js

@@ -60,6 +60,11 @@ export default function upsert(provider) {
         throw new Error('Posterminal not found');
       }
 
+      const maxknowntombstoneid =
+        input.maxknowntombstoneid !== undefined
+          ? input.maxknowntombstoneid
+          : (existing.rows[0].maxknowntombstoneid ?? null);
+
       await runner.query(updateSql, {
         id,
         companyId,
@@ -68,11 +73,13 @@ export default function upsert(provider) {
         pairingpin,
         pairedAt,
         clientserial,
+        maxknowntombstoneid,
       });
 
-      return { id, name, token, pairingpin, pairedAt, clientserial };
+      return { id, name, token, pairingpin, pairedAt, clientserial, maxknowntombstoneid };
     }
 
+    const maxknowntombstoneid = input.maxknowntombstoneid ?? null;
     const created = await runner.query(createSql, {
       companyId,
       name,
@@ -80,6 +87,7 @@ export default function upsert(provider) {
       pairingpin,
       pairedAt,
       clientserial,
+      maxknowntombstoneid,
     });
 
     const row = created.rows[0] ?? {
@@ -89,6 +97,7 @@ export default function upsert(provider) {
       pairingpin,
       pairedAt,
       clientserial,
+      maxknowntombstoneid,
     };
 
     return {
@@ -98,6 +107,7 @@ export default function upsert(provider) {
       pairingpin: row.pairingpin,
       pairedAt: row.pairedAt ?? null,
       clientserial: row.clientserial ?? null,
+      maxknowntombstoneid: row.maxknowntombstoneid ?? null,
     };
   };
 }

src/store/stock/adjust.js

@@ -123,54 +123,16 @@ export default function adjust(provider) {
           throw new Error(`A father article cannot have stock (${item.sku})`);
         }
 
-        const articlelistId = artRes.rows[0]?.articlelist_id;
+        if (artRes.rows[0]?.articlelist_id != null) {
-        if (articlelistId != null) {
+          throw new Error(`A Stückliste cannot have manual stock adjustments (${item.sku})`);
-          const compRes = await runner.query(`
-            SELECT
-              ala.article_id AS articleId,
-              ala.count,
-              a.sku,
-              at.name AS articleName
-            FROM articlelistarticle ala
-            INNER JOIN article a ON a.id = ala.article_id
-            LEFT JOIN articletext at ON at.article_id = a.id AND at.language_id = @languageId
-            WHERE ala.articlelist_id = @articlelistId
-            ORDER BY ala.sort ASC, ala.id ASC
-          `, {
-            articlelistId,
-            languageId: resolved.languageId,
-          });
-
-          if (compRes.rows.length === 0) {
-            throw new Error(`Stückliste has no items (${item.sku})`);
-          }
-
-          for (const comp of compRes.rows) {
-            const compCount = Number(comp.count || 1);
-            const compAmount = item.amount * compCount;
-            const compText = item.text
-              ? `${item.text} (${item.sku})`
-              : (compAmount > 0
-                  ? `Manual stock addition (+${compAmount}) [${item.sku}]`
-                  : `Manual stock removal (${compAmount}) [${item.sku}]`);
-
-            resolvedArticles.push({
-              sku: comp.sku,
-              warehouseId: item.warehouseId,
-              amount: compAmount,
-              text: compText,
-              articleId: comp.articleId,
-              articleName: comp.articleName || comp.sku,
-            });
-          }
-        } else {
-          const nameRes = await runner.query(GET_ARTICLE_NAME_SQL, {
-            articleId: resolved.articleId,
-            languageId: resolved.languageId,
-          });
-          const articleName = nameRes.rows[0]?.name ?? item.sku;
-          resolvedArticles.push({ ...item, ...resolved, articleName });
         }
+
+        const nameRes = await runner.query(GET_ARTICLE_NAME_SQL, {
+          articleId: resolved.articleId,
+          languageId: resolved.languageId,
+        });
+        const articleName = nameRes.rows[0]?.name ?? item.sku;
+        resolvedArticles.push({ ...item, ...resolved, articleName });
       }
 
       // Allocate unique adjustment number using the dedicated adjustment number scheme