fix(usage): introduce consented v4 without changing historical reports

frontend/src/features/settings/UsageCatalog.tsx

@@ -1,6 +1,6 @@
 import { useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import catalog from './usageFeatures.v3.json';
+import catalog from './usageFeatures.v4.json';
 
 /** Local, static disclosure: opening it never contacts the collector. */
 export function UsageCatalog() {

frontend/src/features/settings/__tests__/ProductUsageTab.test.tsx

@@ -69,7 +69,7 @@ beforeEach(() => {
   };
 });
 afterEach(cleanup);
-it('shows every v2 signal locally before participation, without collector calls', async () => {
+it('shows every v4 signal locally before participation, without collector calls', async () => {
   mount();
   await screen.findByText('productUsage.catalogTitle');
   expect(screen.getAllByRole('heading', { level: 4, hidden: true })).toHaveLength(87);
@@ -77,8 +77,8 @@ it('shows every v2 signal locally before participation, without collector calls'
   expect(service.preview).not.toHaveBeenCalled();
   expect(service.upgradeConsent).not.toHaveBeenCalled();
 });
-it('existing v1 requires renewed unchecked consent; cancellation keeps v1 unchanged', async () => {
-  vi.mocked(service.status).mockResolvedValue({ ...status, status: 'active', consent_update_available: true });
+it.each(['usage.v1', 'usage.v2', 'usage.v3'])('existing %s requires renewed unchecked consent; cancellation keeps its scope unchanged', async (schema_version) => {
+  vi.mocked(service.status).mockResolvedValue({ ...status, status: 'active', schema_version, consent_update_available: true });
   vi.mocked(service.upgradeConsent).mockResolvedValue({ delivered: false, queued: true, state: { ...status, status: 'active', pending_action: 'consent' } });
   mount();
   fireEvent.click(await screen.findByText('productUsage.reviewUpgrade'));

frontend/src/features/settings/usageFeatures.v3.json

@@ -1182,18 +1182,18 @@
       },
       "used": null
     },
-    "gallery_downloads_restricted": {
+    "gallery_downloads": {
       "category": "gallery_configuration",
-      "since": "usage.v3",
+      "since": "usage.v2",
       "measurement": "configuration",
       "configuration": "configuration",
       "name": {
-        "en": "Gallery downloads restricted",
-        "de": "Galerie-Downloads eingeschränkt"
+        "en": "Gallery downloads allowed",
+        "de": "Galerie-Downloads erlaubt"
       },
       "configured": {
-        "en": "At least one gallery has downloads switched off; only existence across the installation, never gallery IDs or counts.",
-        "de": "Mindestens eine Galerie hat Downloads abgeschaltet; nur installationsweite Existenz, niemals Galeriekennungen oder Anzahlen."
+        "en": "Enabled in applicable gallery/global configuration; only existence across the installation, never gallery IDs or counts.",
+        "de": "In der betreffenden Galerie-/Globalkonfiguration aktiviert; nur installationsweite Existenz, niemals Galeriekennungen oder Anzahlen."
       },
       "used": null
     },