feat(client): set dynamic page title based on content

- add usePageTitle hook that writes '<title> | Liqa' to document.title
- list pages use section name; detail pages use entity name once loaded
- create/edit pages use static action title, edit includes entity name

client/src/pages/run/RunDetailPage.tsx

@@ -1,6 +1,7 @@
 import { useEffect, useRef, useState } from 'react';
 import { useNavigate, useParams, Link } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
+import { usePageTitle } from '../../hooks/usePageTitle';
 import { runs } from '../../api';
 import type {
   Scenario,
@@ -69,6 +70,7 @@ export function RunDetailPage() {
   const [scenario, setScenario] = useState<Scenario | null>(null);
   const [run, setRun] = useState<ScenarioRunDetail | null>(null);
   const [loading, setLoading] = useState(true);
+  usePageTitle(scenario ? `${t('runs.title')} — ${scenario.name}` : t('runs.title'));
   const [error, setError] = useState<string | null>(null);
   const [polling, setPolling] = useState(false);
   const [pulseKey, setPulseKey] = useState(0);