feat(2): Q4.8 — uptime-kuma Phase-2 enrollment + 3 tests cold green

Recipe-maintainer corpus has no uptime-kuma tests/ directory (uptime-kuma wasn't in their parity
suite), so PARITY.md documents Phase-2 health_check as the parity-aligned baseline + 2 specific
tests beyond.

- tests/uptime-kuma/recipe_meta.py: HEALTH_PATH=/ accepts 200 or 302 (setup-wizard redirect).
- tests/uptime-kuma/functional/test_health_check.py: GET / returns 200/302.
- tests/uptime-kuma/functional/test_socketio_handshake.py: GET /socket.io/?EIO=4&transport=polling
  returns Engine.IO open packet (body starts with 0{, JSON has sid+pingInterval). Proves the
  real-time backend is wired through the nginx proxy.
- tests/uptime-kuma/functional/test_spa_branding.py: GETs /; asserts 'kuma' brand + SPA-bundle
  asset references (/assets/, /icon.svg, /favicon, main.) in the rendered HTML.
- Plan §4.3 prescribed 'create-a-monitor + list-it' deferred (Q4 follow-up — needs Socket.IO
  client + setup-wizard flow; substantial harness addition). PARITY.md documents the deferral.

Cold-verifiable: ssh cc-ci 'RECIPE=uptime-kuma STAGES=install,custom cc-ci-run runner/run_recipe_ci.py'
  install + 3 custom tests PASS, deploy-count=1.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/uptime-kuma/functional/test_spa_branding.py

@@ -0,0 +1,54 @@
+"""uptime-kuma — recipe-specific functional test (Phase 2 P3).
+
+GETs `/` and asserts the served HTML carries uptime-kuma-specific markers:
+- "uptime kuma" (or just "kuma") brand string somewhere in the page (title/body).
+- A reference to one of the SPA's bundled assets (e.g., `/assets/`, `/icon.svg`, `kuma`).
+
+Distinguishes "the SPA bundle is bound and being served" from "a generic 200 response with
+some other content." Non-vacuous: an empty fallback page from a wedged uptime-kuma backend
+would 200 but contain none of these markers.
+"""
+
+from __future__ import annotations
+
+import os
+import ssl
+import sys
+import urllib.request
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "..", "runner"))
+from harness import http as harness_http  # noqa: E402
+
+
+def _get_body(url: str) -> tuple[int, str]:
+    ctx = ssl.create_default_context()
+    ctx.check_hostname = False
+    ctx.verify_mode = ssl.CERT_NONE
+    req = urllib.request.Request(url, method="GET")
+    with urllib.request.urlopen(req, timeout=15, context=ctx) as r:
+        return r.status, r.read().decode(errors="replace")
+
+
+def test_uptime_kuma_spa_has_branding(live_app):
+    """GET /; assert uptime-kuma branding + asset references in HTML."""
+    url = f"https://{live_app}/"
+
+    def _ready():
+        try:
+            status, body = _get_body(url)
+        except Exception:  # noqa: BLE001
+            return None
+        return body if status == 200 else None
+
+    body = harness_http.assert_converges(_ready, f"GET {url}", max_wait=60, interval=3)
+    lower = body.lower()
+    assert "uptime kuma" in lower or "kuma" in lower, (
+        f"Page body has no 'kuma' brand. Excerpt: {body[:200]!r}"
+    )
+    # SPA-bundle markers: at least one of these reference paths should be present
+    bundle_markers = ("/assets/", "/icon.svg", "favicon", "main.")
+    present = [m for m in bundle_markers if m in body]
+    assert present, (
+        f"GET {url} HTML references none of {bundle_markers} (SPA bundle not wired?). "
+        f"Excerpt: {body[:300]!r}"
+    )