✨ feat: enhance admin API helpers with CRUD operations for collections and seed data management

- Added functions for creating, updating, deleting, and listing collection entries in admin API.
- Introduced seed data management for consistent test content across tests.
- Updated global setup and teardown processes to ensure seeded content is created and cleaned up.
- Refactored existing tests to utilize seeded content for improved reliability and maintainability.

tests/e2e-mobile/home.mobile.spec.ts

@@ -1,28 +1,27 @@
-import { test, expect, waitForSpaReady, isMobileViewport } from "./fixtures"
+import { test, expect, waitForSpaReady, isMobileViewport, openHamburgerMenu } from "./fixtures"
+import { SEEDED_TEST_CONTENT } from "../fixtures/test-constants"
 
-test.describe("Home Page (Mobile)", () => {
-    test("should load the start page on mobile", async ({ page }) => {
-        await page.goto("/de/")
+test.describe("Seeded Home Page (Mobile)", () => {
+    test("loads the seeded page on mobile and keeps the current route prefix", async ({ page }) => {
+        await page.goto(`/de${SEEDED_TEST_CONTENT.home.path}`)
         await waitForSpaReady(page)
 
         expect(isMobileViewport(page) || true).toBeTruthy()
         await expect(page.locator("#appContainer")).not.toBeEmpty()
+        await expect(page).toHaveURL(new RegExp(`/de${SEEDED_TEST_CONTENT.home.path}$`))
+        await expect(page.getByRole("heading", { level: 1, name: "Playwright Seed Startseite" })).toBeVisible()
     })
 
-    test("should have a visible header", async ({ page }) => {
-        await page.goto("/de/")
+    test("opens the mobile menu and exposes the language switcher", async ({ page }) => {
+        await page.goto(`/de${SEEDED_TEST_CONTENT.home.path}`)
         await waitForSpaReady(page)
 
         const header = page.locator("header")
         await expect(header).toBeVisible()
-    })
+        await openHamburgerMenu(page)
 
-    // Uncomment when your project has a hamburger menu:
-    // test("should open hamburger menu", async ({ page }) => {
-    //     await page.goto("/de/")
-    //     await waitForSpaReady(page)
-    //     await openHamburgerMenu(page)
-    //     const expandedBtn = page.locator("header button[aria-expanded='true']")
-    //     await expect(expandedBtn).toBeVisible()
-    // })
+        await expect(page.locator("header button[aria-expanded='true']")).toBeVisible()
+        await expect(header.getByRole("link", { name: "Deutsch" })).toBeVisible()
+        await expect(header.getByRole("link", { name: "English" })).toBeVisible()
+    })
 })