fix: auth/me check on load

static/opax.html

@@ -794,9 +794,22 @@ async function pollBuild(){
     return null
   }
 }
-document.addEventListener('DOMContentLoaded', () => {
+document.addEventListener('DOMContentLoaded', async () => {
+  // Sjekk auth-status
+  try {
+    const r = await fetch('/auth/me')
+    if(r.ok){
+      const u = await r.json()
+      document.getElementById('sb-session').textContent = u.email || 'innlogget'
+      document.getElementById('send-btn').disabled = false
+    } else {
+      window.location.href = '/auth/login'
+    }
+  } catch(e) {
+    document.getElementById('sb-session').textContent = 'session: feil'
+  }
   pollBuild()
-  setInterval(pollBuild,30000)
+  setInterval(pollBuild, 30000)
 })
 
 // ─── Fix 3: CostGuard — fetchWithTimeout helper (AbortController, 10s) ───