Implement upsert label flow and use-based mark gone handling

tests/features/stock/mark-gone.test.js

@@ -0,0 +1,71 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+
+const useStockItemMock = vi.fn();
+const getStockEntryMock = vi.fn();
+
+vi.mock('../../../src/api/stock.js', () => ({
+  useStockItem: (...args) => useStockItemMock(...args),
+  getStockEntry: (...args) => getStockEntryMock(...args),
+  adjustStockEntry: vi.fn(),
+  listStockEntries: vi.fn(),
+  listGroupedStockEntries: vi.fn(),
+  updateStockItem: vi.fn(),
+}));
+
+vi.mock('../../../src/api/locations.js', () => ({
+  fetchLocations: vi.fn(async () => ({ flat: [], tree: [] })),
+}));
+
+const { stockDetailPageData } = await import('../../../src/features/stock/stock-detail-page.js');
+const { stockListPageData } = await import('../../../src/features/stock/stock-list-page.js');
+
+describe('stock mark-gone behavior', () => {
+  beforeEach(() => {
+    useStockItemMock.mockReset();
+    getStockEntryMock.mockReset();
+    globalThis.window = {
+      __loncApp: {
+        navigate: vi.fn(),
+      },
+    };
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+    delete globalThis.window;
+  });
+
+  it('stock detail markGone uses /use and shows info for already gone', async () => {
+    useStockItemMock.mockResolvedValueOnce({ status: 'already_gone' });
+    const addAlert = vi.fn();
+    const data = stockDetailPageData({ addAlert });
+    data.entry = { uuid_b64: 'item-1', name: 'Rice' };
+
+    await data.markGone();
+
+    expect(useStockItemMock).toHaveBeenCalledWith({ addAlert }, 'item-1');
+    expect(addAlert).toHaveBeenCalledWith({
+      type: 'info',
+      message: 'Rice was already out of stock.',
+    });
+    expect(globalThis.window.__loncApp.navigate).toHaveBeenCalledWith('/stock');
+  });
+
+  it('stock list markGone removes entry and uses /use path', async () => {
+    useStockItemMock.mockResolvedValueOnce({ status: 'used' });
+    const addAlert = vi.fn();
+    const data = stockListPageData({ addAlert, isConnected: false });
+    data.entries = [{ id: 1, uuid_b64: 'item-1', name: 'Flour' }];
+    data.editForms = { 1: { level: 'plenty', quantity: 1 } };
+    data.editErrors = {};
+
+    await data.markGone(data.entries[0]);
+
+    expect(useStockItemMock).toHaveBeenCalledWith({ addAlert, isConnected: false }, 'item-1');
+    expect(data.entries).toEqual([]);
+    expect(addAlert).toHaveBeenCalledWith({
+      type: 'success',
+      message: 'Flour was marked gone and removed from the list.',
+    });
+  });
+});