feat. Mini UI to hide ugly 404s

tests/test_main_pages.py

@@ -0,0 +1,40 @@
+from __future__ import annotations
+
+from fastapi.testclient import TestClient
+
+from gitea_codex_bot.main import app
+
+
+def test_root_returns_tailwind_landing_page() -> None:
+    client = TestClient(app)
+
+    response = client.get("/")
+
+    assert response.status_code == 200
+    assert response.headers["content-type"].startswith("text/html")
+    assert "Gitea Codex Review Bot" in response.text
+    assert "cdn.tailwindcss.com" in response.text
+    assert 'id="health-button"' in response.text
+    assert 'id="health-modal"' in response.text
+    assert 'fetch("/healthz"' in response.text
+
+
+def test_404_returns_tailwind_page_for_browser_requests() -> None:
+    client = TestClient(app)
+
+    response = client.get("/missing", headers={"Accept": "text/html"})
+
+    assert response.status_code == 404
+    assert response.headers["content-type"].startswith("text/html")
+    assert "Error 404" in response.text
+    assert "cdn.tailwindcss.com" in response.text
+
+
+def test_404_returns_json_for_non_browser_requests() -> None:
+    client = TestClient(app)
+
+    response = client.get("/missing", headers={"Accept": "application/json"})
+
+    assert response.status_code == 404
+    assert response.headers["content-type"].startswith("application/json")
+    assert response.json() == {"detail": "Not Found"}