Update study reminders timestamp and exclude admin sessions from pageview analytics

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server/routes/analytics.js

@@ -1,5 +1,5 @@
 import { createHash, randomUUID } from 'node:crypto'
-import { requireAdminAuth } from '../auth.js'
+import { requireAdminAuth, isValidAdminSession } from '../auth.js'
 import { getClientIp, hasVisitorConsent, setConsentCookie, parseCookies } from '../helpers.js'
 import {
   VISITOR_COOKIE,
@@ -147,6 +147,9 @@ export function register(app) {
   })
 
   app.post('/api/analytics/pageview', async (req, res) => {
+    if (isValidAdminSession(req)) {
+      res.json({ ok: false, reason: 'admin' }); return
+    }
     if (!hasVisitorConsent(req)) {
       res.json({ ok: false, reason: 'no-consent' }); return
     }