Merge feature/export-1: Datenexport (zip JSON+German CSVs) on /einstellungen + CI flake-cap [god-QA pending result-gate]

# Conflicts:
#	GerbilManager.Tests/GerbilManager.Tests.csproj
#	GerbilManagerWebAPI/Program.cs
#	gerbil-manager-web/src/App.tsx
#	gerbil-manager-web/src/components/AppShell.tsx
#	gerbil-manager-web/src/pages/EinstellungenPage.tsx

gerbil-manager-web/e2e/einstellungen.spec.ts

@@ -0,0 +1,20 @@
+/** EXPORT-1: Einstellungen — Datenexport-Karte + Download-Smoke. */
+import { de, expect, gotoSection, test } from './fixtures'
+
+const t = de.pages.datenexport
+
+test('Einstellungen zeigt die Datenexport-Karte und der Download startet', async ({ page }) => {
+  await gotoSection(page, de.nav.settings)
+  await expect(page.getByRole('heading', { name: de.pages.einstellungen.title })).toBeVisible()
+
+  // Datenexport-Karte mit deutschem Erklärtext
+  await expect(page.getByRole('heading', { name: t.title })).toBeVisible()
+  await expect(page.getByText(t.intro)).toBeVisible()
+  await expect(page.getByText(t.photoNote)).toBeVisible()
+
+  // Klick startet den Zip-Download
+  const downloadPromise = page.waitForEvent('download')
+  await page.getByRole('link', { name: t.button }).click()
+  const download = await downloadPromise
+  expect(download.suggestedFilename()).toContain('rennmaus-export')
+})

gerbil-manager-web/e2e/mock-api.ts

@@ -98,11 +98,37 @@ export async function installMockApi(page: Page): Promise<MockDb> {
     'weight-records': collection(db.weightRecords as unknown as Row[], 'wr'),
   }
 
-  await page.route(`${API_ORIGIN}/**`, async (route) => {
+  const handler = async (route: Route) => {
     const request = route.request()
     const url = new URL(request.url())
     const method = request.method()
-    const path = url.pathname
+    // OPS-1: in Produktion ist die API-Basis der relative Pfad /api (nginx-Proxy);
+    // den Präfix normalisieren, damit der Mock unter beiden Basen funktioniert.
+    const path = url.pathname.replace(/^\/api(?=\/)/, '')
+
+    // EXPORT-1: Zip-Download (Inhalt egal — der Smoke prüft nur, dass der
+    // Download startet; ein leeres Zip = End-of-central-directory-Record).
+    if (path === '/export' && method === 'GET') {
+      return route.fulfill({
+        status: 200,
+        contentType: 'application/zip',
+        headers: { 'Content-Disposition': 'attachment; filename="rennmaus-export-e2e.zip"' },
+        body: Buffer.from([0x50, 0x4b, 0x05, 0x06, ...new Array(18).fill(0)]),
+      })
+    }
+
+    // FEAT-13: Zuchtprofil (Einstellungen-Seite lädt es vor dem Rendern)
+    if (path === '/settings/breeder-profile') {
+      if (method === 'GET') {
+        return json(route, 200, {
+          zuchtName: 'Zucht der kleinen Chaoten',
+          name: 'Frau Erika Muster',
+          address: 'Musterweg 1, 12345 Musterstadt',
+          phone: '', email: '', homepage: '', city: 'Musterstadt',
+        })
+      }
+      if (method === 'PUT') return json(route, 204)
+    }
 
     // Sonderrouten zuerst (FEAT-1b/FEAT-4-Verträge)
     let m = path.match(/^\/gerbils\/([^/]+)\/photos$/)
@@ -157,7 +183,15 @@ export async function installMockApi(page: Page): Promise<MockDb> {
       return json(route, 204)
     }
     return json(route, 405)
-  })
+  }
+
+  // Beide API-Basen abfangen: absolute Dev-URL und /api-relativ (OPS-1-Proxy).
+  // URL-Prädikat statt Glob: '**/api/**' würde auch Vites Modul-Requests
+  // (/src/api/client.ts …) treffen und die App selbst kaputt-intercepten.
+  await page.route(
+    (url) => url.origin === API_ORIGIN || url.pathname.startsWith('/api/'),
+    handler,
+  )
 
   return db
 }