Update admin theme/layout and refresh README details.

Align the project baseline with the latest admin interface styling and layout structure while documenting setup and usage updates in README.

apps/api/tests/modules/auth/test_email_tokens.py

@@ -0,0 +1,20 @@
+from tests.helpers import latest_token
+
+
+def test_verify_email_rejects_invalid_token(client):
+    client.post("/api/v1/auth/register", json={"email": "bad@example.com", "password": "Valid123"})
+    response = client.post("/api/v1/auth/verify-email", json={"token": "invalid-token"})
+    assert response.status_code == 400
+    assert response.json()["detail"] == "INVALID_TOKEN"
+
+
+def test_resend_verification_sends_new_token(client):
+    client.post("/api/v1/auth/register", json={"email": "resend@example.com", "password": "Valid123"})
+    first_token = latest_token("resend@example.com", "verify_email")
+
+    client.post("/api/v1/auth/resend-verification", json={"email": "resend@example.com"})
+    second_token = latest_token("resend@example.com", "verify_email")
+    assert first_token != second_token
+
+    verify = client.post("/api/v1/auth/verify-email", json={"token": second_token})
+    assert verify.status_code == 200