Analytics: unique visitors this week + probed-URLs list; Scripture Index: most-studied strip + print; admin warning for unparseable passage references; v2.44.0

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

server/routes/analytics.js

@@ -393,6 +393,13 @@ export function register(app) {
       firstHitAt: state.hitStats.firstHitAt,
       lastHitAt: state.hitStats.lastHitAt,
       topPaths, topPathsReal, topPathsBot,
+      topUnknownPaths: Object.entries(state.hitStats.byPathUnknown ?? {})
+        .sort((a, b) => b[1] - a[1]).slice(0, 25).map(([path, hits]) => ({ path, hits })),
+      uniqueVisitors7d: new Set(
+        state.visitorStats.recentVisits
+          .filter(v => Date.now() - new Date(v.at).getTime() <= 7 * 24 * 60 * 60 * 1000)
+          .map(v => v.visitorId),
+      ).size,
       last7Days, last7DaysReal, last7DaysBot,
       last30DaysTotal, last30DaysRealTotal, last30DaysBotTotal,
       botReasons,