feat(cfold): canonicalize custom test layout

tests/custom-html/playwright/test_browser_smoke.py

@@ -1,46 +0,0 @@
-"""custom-html — Playwright UI flow (Phase 2 P6).
-
-The recipe-maintainer corpus did not ship a Playwright test for custom-html — but plan §4.1 names
-`playwright/` as the canonical home for browser flows where a recipe's core UX is a UI. custom-html
-serves HTML; a browser-rendered fetch (vs raw HTTP) proves the page actually renders and any client-
-side resources resolve. Distinct from `tests/custom-html/test_install.py` which runs Playwright as
-part of the lifecycle INSTALL overlay; this file is the standalone Phase-2 custom-stage version, so a
-later non-lifecycle browser flow (e.g. a content-management UI) has its home already.
-"""
-
-from __future__ import annotations
-
-import os
-import sys
-
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "..", "runner"))
-from harness import browser as harness_browser  # noqa: E402
-
-
-def test_browser_renders_html(live_app):
-    """Browser-render the served root page and assert the HTML loads with no console errors."""
-    from playwright.sync_api import sync_playwright
-
-    url = f"https://{live_app}/"
-    with sync_playwright() as p:
-        browser = p.chromium.launch(args=["--no-sandbox"])
-        try:
-            context = browser.new_context(ignore_https_errors=True)
-            page = context.new_page()
-            console_errors: list[str] = []
-            page.on(
-                "console",
-                lambda msg: console_errors.append(msg.text) if msg.type == "error" else None,
-            )
-            # F2-3 hardening (status mismatch + PlaywrightError retries)
-            resp = harness_browser.goto_with_retry(
-                page, url, accept_statuses=(200,), wait_until="load"
-            )
-            assert resp is not None and resp.status == 200, f"page status {resp and resp.status}"
-            html = page.content()
-            assert "<html" in html.lower(), "page did not render an HTML document"
-            # nginx default page contains "nginx" in markup; either custom HTML or default works,
-            # but BOTH should be served as actual HTML — caught above.
-            assert not console_errors, f"browser logged console errors: {console_errors}"
-        finally:
-            browser.close()