test: add Playwright E2E test suite (30 tests)

Add browser-level end-to-end tests covering public pages, Keycloak
OAuth authentication flow, dashboard interactions, providers config,
developer section, organization pages, and sidebar navigation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

e2e/public.spec.ts

@@ -0,0 +1,60 @@
+import { test, expect } from "@playwright/test";
+
+test.describe("Public pages", () => {
+  test("landing page loads with heading and nav links", async ({ page }) => {
+    await page.goto("/");
+
+    await expect(page.locator(".landing-logo").first()).toHaveText("CERTifAI");
+    await expect(page.locator(".landing-nav-links")).toBeVisible();
+    await expect(page.locator('a[href="#features"]')).toBeVisible();
+    await expect(page.locator('a[href="#how-it-works"]')).toBeVisible();
+    await expect(page.locator('a[href="#pricing"]')).toBeVisible();
+  });
+
+  test("landing page Log In link navigates to login route", async ({
+    page,
+  }) => {
+    await page.goto("/");
+
+    const loginLink = page
+      .locator(".landing-nav-actions a, .landing-nav-actions Link")
+      .filter({ hasText: "Log In" });
+    await loginLink.click();
+
+    await expect(page).toHaveURL(/\/login/);
+  });
+
+  test("impressum page loads with legal content", async ({ page }) => {
+    await page.goto("/impressum");
+
+    await expect(page.locator("h1")).toHaveText("Impressum");
+    await expect(
+      page.locator("h2", { hasText: "Information according to" })
+    ).toBeVisible();
+    await expect(page.locator(".legal-content")).toContainText(
+      "CERTifAI GmbH"
+    );
+  });
+
+  test("privacy page loads with privacy content", async ({ page }) => {
+    await page.goto("/privacy");
+
+    await expect(page.locator("h1")).toHaveText("Privacy Policy");
+    await expect(
+      page.locator("h2", { hasText: "Introduction" })
+    ).toBeVisible();
+    await expect(
+      page.locator("h2", { hasText: "Your Rights" })
+    ).toBeVisible();
+  });
+
+  test("footer links are present on landing page", async ({ page }) => {
+    await page.goto("/");
+
+    const footer = page.locator(".landing-footer");
+    await expect(footer.locator('a:has-text("Impressum")')).toBeVisible();
+    await expect(
+      footer.locator('a:has-text("Privacy Policy")')
+    ).toBeVisible();
+  });
+});