Refactor UI assets and harden quality checks

tests/test_web_sections.py

@@ -0,0 +1,30 @@
+from karldns.web.html_utils import SafeHtml
+from karldns.web.sections.public_home import (
+    _manual_updates_section,
+    _public_home_hero,
+    _setup_flow_section,
+)
+
+
+def test_public_home_sections_render_independently() -> None:
+    hero = _public_home_hero(
+        suffix="ddns.example.net",
+        demo_update_url="https://karldns.example/api/v1/router/update/<secret>?myip=<ipaddr>",
+    )
+    setup = _setup_flow_section(
+        create_demo="curl -sS 'https://karldns.example/api/v1/router/update/<secret>?myip=203.0.113.10'",
+        create_demo_command="curl -sS 'https://karldns.example/api/v1/router/update/<secret>?myip=203.0.113.10'",
+    )
+    manual = _manual_updates_section(
+        manual_demo="# explicit IPv4\ncurl -sS 'https://karldns.example/api/v1/router/update/<secret>?myip=203.0.113.10'",
+    )
+
+    assert isinstance(hero, SafeHtml)
+    assert 'data-ui="hero-command"' in hero
+    assert "ddns.example.net" in hero
+    assert isinstance(setup, SafeHtml)
+    assert "KarlDNS setup flow" in setup
+    assert "Copy update example" in setup
+    assert isinstance(manual, SafeHtml)
+    assert 'id="manual-updates"' in manual
+    assert "Copy manual update examples" in manual