diff --git a/lobby/templates/lobby/host_screen.html b/lobby/templates/lobby/host_screen.html
index 2d34381..98bc86b 100644
--- a/lobby/templates/lobby/host_screen.html
+++ b/lobby/templates/lobby/host_screen.html
@@ -25,12 +25,15 @@
 <button onclick="sessionDetail()">Session-status</button>
 <button id="autoRefreshToggleBtn" onclick="toggleAutoRefresh()">Auto-refresh: OFF</button>
 <p id="autoRefreshHint">Auto-refresh er slået fra.</p>
+<p id="lastRefreshStatus">Session-data ikke opdateret endnu.</p>
 <pre id="out">Klar.</pre>
 <script>
 var currentSessionStatus="";
 var autoRefreshEnabled=false;
 var autoRefreshTimer=null;
 var hostActionInFlight=false;
+var lastRefreshAtLabel="";
+var lastRefreshFailed=false;
 function csrf(){var m=document.cookie.match(/csrftoken=([^;]+)/);return m?m[1]:"";}
 function code(){return document.getElementById("code").value.trim().toUpperCase();}
 function rq(){return document.getElementById("roundQuestionId").value.trim();}
@@ -42,6 +45,9 @@ function updateAutoRefreshUi(){var btn=document.getElementById("autoRefreshToggl
 function stopAutoRefresh(reason){autoRefreshEnabled=false;if(autoRefreshTimer){clearInterval(autoRefreshTimer);autoRefreshTimer=null;}if(reason){var hint=document.getElementById("autoRefreshHint");if(hint){hint.textContent=reason;}}updateAutoRefreshUi();saveHostContext();}
 function startAutoRefresh(){if(!code()){updateAutoRefreshUi();return;}autoRefreshEnabled=true;if(autoRefreshTimer){clearInterval(autoRefreshTimer);}autoRefreshTimer=setInterval(function(){if(!code()){return;}if(currentSessionStatus==="finished"){stopAutoRefresh("Auto-refresh stoppet: spillet er afsluttet.");return;}sessionDetail();},10000);updateAutoRefreshUi();saveHostContext();}
 function toggleAutoRefresh(){if(autoRefreshEnabled){stopAutoRefresh();return;}startAutoRefresh();}
+function formatTimeLabel(dateObj){return dateObj.toLocaleTimeString("da-DK",{hour12:false});}
+function markSessionRefresh(status){if(status>=200&&status<300){lastRefreshAtLabel=formatTimeLabel(new Date());lastRefreshFailed=false;}else{lastRefreshFailed=true;}updateLastRefreshStatus();}
+function updateLastRefreshStatus(){var el=document.getElementById("lastRefreshStatus");if(!el){return;}if(!lastRefreshAtLabel){el.textContent=lastRefreshFailed?"Session-data kan være forældet (ingen succesfuld opdatering endnu).":"Session-data ikke opdateret endnu.";return;}if(lastRefreshFailed){el.textContent="Session-data kan være forældet (seneste succes: "+lastRefreshAtLabel+").";return;}el.textContent="Sidst opdateret: "+lastRefreshAtLabel+".";}
 function normalizeApiError(data){if(!data||typeof data!=="object"){return"";}return (data.error_code||data.error||"").toString();}
 function mapUiErrorMessage(errorKey){if(!errorKey){return"";}var key=errorKey.toLowerCase();if(key.indexOf("phase")!==-1){return"Ugyldig fase for handlingen. Opdatér session-status og prøv igen.";}if(key.indexOf("token")!==-1||key.indexOf("auth")!==-1){return"Session-token er ugyldig eller udløbet. Rejoin sessionen og prøv igen.";}if(key.indexOf("round")!==-1||key.indexOf("question")!==-1||key.indexOf("state")!==-1){return"Runde-kontekst matcher ikke længere. Opdatér session-status før næste handling.";}if(key.indexOf("session")!==-1){return"Sessionkoden er ugyldig eller sessionen findes ikke længere.";}return"Handling fejlede. Opdatér session-status og prøv igen.";}
 function updateErrorHint(status,data){var el=document.getElementById("hostErrorHint");if(!el){return;}if(status>=200&&status<300){el.textContent="Ingen fejl.";return;}var errKey=normalizeApiError(data);el.textContent="Fejl: "+mapUiErrorMessage(errKey)+" ("+(errKey||("http_"+status))+")";}
@@ -49,7 +55,7 @@ function updateErrorHint(status,data){var el=document.getElementById("hostErrorH
 function updatePhaseStatus(){var el=document.getElementById("phaseStatus");if(!el){return;}if(!currentSessionStatus){el.textContent="Fase: ukendt (opdatér session-status).";return;}el.textContent="Fase: "+phaseLabel(currentSessionStatus)+" ("+currentSessionStatus+")";}
 function syncStartRoundGuard(data){var btn=document.getElementById("startRoundBtn");var hint=document.getElementById("startRoundHint");var status=document.getElementById("playerCountStatus");if(!btn||!hint||!status){return;}var count=(data&&data.session&&typeof data.session.players_count==="number")?data.session.players_count:null;var phase=currentSessionStatus||"";if(phase&&phase!=="lobby"){btn.disabled=true;status.textContent=count===null?"Spillere i session: ukendt":"Spillere i session: "+count;hint.textContent="Start runde er kun tilladt i lobby-fasen.";return;}if(count===null){btn.disabled=true;status.textContent="Spillere i session: ukendt";hint.textContent="Opdatér session-status for at validere 3-5 spillere.";return;}status.textContent="Spillere i session: "+count;if(count<3){btn.disabled=true;hint.textContent="Mangler spillere: kræver mindst 3 for at starte runde.";return;}if(count>5){btn.disabled=true;hint.textContent="For mange spillere: maks 5 i MVP før runde-start.";return;}btn.disabled=false;hint.textContent="Klar: spillerantal er indenfor 3-5 til runde-start.";}
 function updateHostActionState(){var hasCode=!!code();var hasRound=!!rq();var phase=currentSessionStatus||"";var showQuestionBtn=document.getElementById("showQuestionBtn");var mixAnswersBtn=document.getElementById("mixAnswersBtn");var calcScoresBtn=document.getElementById("calcScoresBtn");var showScoreboardBtn=document.getElementById("showScoreboardBtn");var nextRoundBtn=document.getElementById("nextRoundBtn");var finishGameBtn=document.getElementById("finishGameBtn");var roundQuestionInput=document.getElementById("roundQuestionId");var roundQuestionGuardHint=document.getElementById("roundQuestionGuardHint");var categorySelect=document.getElementById("category");var categoryGuardHint=document.getElementById("categoryGuardHint");var hint=document.getElementById("hostActionHint");if(showQuestionBtn){showQuestionBtn.disabled=hostActionInFlight||!hasCode||phase!=="lie";}if(showScoreboardBtn){showScoreboardBtn.disabled=hostActionInFlight||!hasCode||phase!=="reveal";}if(nextRoundBtn){nextRoundBtn.disabled=hostActionInFlight||!hasCode||phase!=="reveal";}if(finishGameBtn){finishGameBtn.disabled=hostActionInFlight||!hasCode||phase!=="reveal";}if(mixAnswersBtn){mixAnswersBtn.disabled=hostActionInFlight||!hasCode||!hasRound||(phase!=="lie"&&phase!=="guess");}if(calcScoresBtn){calcScoresBtn.disabled=hostActionInFlight||!hasCode||!hasRound||phase!=="guess";}var canEditRoundQuestion=!!hasCode&&(phase==="lie"||phase==="guess"||phase==="reveal");if(roundQuestionInput){roundQuestionInput.disabled=hostActionInFlight||!canEditRoundQuestion;}if(roundQuestionGuardHint){if(hostActionInFlight){roundQuestionGuardHint.textContent="Round question-id er låst mens en handling kører.";}else if(!hasCode){roundQuestionGuardHint.textContent="Angiv sessionkode for at redigere round question-id.";}else if(!phase){roundQuestionGuardHint.textContent="Opdatér session-status for round question-id.";}else if(canEditRoundQuestion){roundQuestionGuardHint.textContent="Round question-id kan redigeres i fase: "+phaseLabel(phase)+".";}else{roundQuestionGuardHint.textContent="Round question-id er låst i fase: "+phaseLabel(phase)+".";}}if(categorySelect){categorySelect.disabled=hostActionInFlight||!hasCode||phase!=="lobby";}if(categoryGuardHint){if(hostActionInFlight){categoryGuardHint.textContent="Kategori er midlertidigt låst mens en handling kører.";}else if(!hasCode){categoryGuardHint.textContent="Angiv sessionkode for at låse kategori til lobby-fasen.";}else if(phase==="lobby"){categoryGuardHint.textContent="Kategori kan vælges i lobby-fasen.";}else if(!phase){categoryGuardHint.textContent="Opdatér session-status for at validere kategori-lås.";}else{categoryGuardHint.textContent="Kategori er låst udenfor lobby-fasen.";}}if(!hint){return;}if(hostActionInFlight){hint.textContent="Handling kører… afvent svar før næste klik.";return;}if(!hasCode){hint.textContent="Angiv sessionkode for at aktivere host-actions.";return;}if(!phase){hint.textContent="Opdatér session-status for fasebaserede host-actions.";return;}if(phase==="finished"){hint.textContent="Spillet er afsluttet: gameplay-actions er låst.";return;}if((phase==="lie"||phase==="guess")&&!hasRound){hint.textContent="Round question id mangler: mix/beregn score er låst.";return;}hint.textContent="Host-actions er klar for fase: "+phaseLabel(phase)+".";}
-async function api(path,method,payload){var o={method:method||"GET",headers:{"Accept":"application/json"}};if(payload!==null){o.headers["Content-Type"]="application/json";o.headers["X-CSRFToken"]=csrf();o.body=JSON.stringify(payload);}var r=await fetch(path,o);var d=await r.json().catch(function(){return {};});document.getElementById("out").textContent=JSON.stringify({status:r.status,data:d},null,2);if(d.session&&d.session.code){document.getElementById("code").value=d.session.code;}if(d.session&&d.session.status){currentSessionStatus=d.session.status;}if(d.round_question&&d.round_question.id){document.getElementById("roundQuestionId").value=d.round_question.id;}updateErrorHint(r.status,d);updatePhaseStatus();syncStartRoundGuard(d);updateHostActionState();if(currentSessionStatus==="finished"&&autoRefreshEnabled){stopAutoRefresh("Auto-refresh stoppet: spillet er afsluttet.");}else{updateAutoRefreshUi();}saveHostContext();return d;}
+async function api(path,method,payload){var o={method:method||"GET",headers:{"Accept":"application/json"}};if(payload!==null){o.headers["Content-Type"]="application/json";o.headers["X-CSRFToken"]=csrf();o.body=JSON.stringify(payload);}var r=await fetch(path,o);var d=await r.json().catch(function(){return {};});var isSessionDetailRead=(method||"GET")==="GET"&&/^\/lobby\/sessions\/[A-Z0-9]+$/.test(path);if(isSessionDetailRead){markSessionRefresh(r.status);}document.getElementById("out").textContent=JSON.stringify({status:r.status,data:d},null,2);if(d.session&&d.session.code){document.getElementById("code").value=d.session.code;}if(d.session&&d.session.status){currentSessionStatus=d.session.status;}if(d.round_question&&d.round_question.id){document.getElementById("roundQuestionId").value=d.round_question.id;}updateErrorHint(r.status,d);updatePhaseStatus();syncStartRoundGuard(d);updateHostActionState();if(currentSessionStatus==="finished"&&autoRefreshEnabled){stopAutoRefresh("Auto-refresh stoppet: spillet er afsluttet.");}else{updateAutoRefreshUi();}saveHostContext();return d;}
 function withHostActionLock(fn){if(hostActionInFlight){return Promise.resolve({error:"host_action_in_flight"});}hostActionInFlight=true;updateHostActionState();return Promise.resolve().then(fn).finally(function(){hostActionInFlight=false;updateHostActionState();});}
 function createSession(){return withHostActionLock(function(){return api("/lobby/sessions/create","POST",{});});} 
 function sessionDetail(){return api("/lobby/sessions/"+code(),"GET",null);} 
@@ -62,7 +68,7 @@ function nextRound(){return withHostActionLock(function(){return api("/lobby/ses
 function finishGame(){return withHostActionLock(function(){return api("/lobby/sessions/"+code()+"/finish","POST",{});});} 
 ["code","roundQuestionId"].forEach(function(fieldId){var field=document.getElementById(fieldId);if(!field){return;}field.addEventListener("input",function(){syncStartRoundGuard(null);updateHostActionState();saveHostContext();});field.addEventListener("change",function(){syncStartRoundGuard(null);updateHostActionState();saveHostContext();});});
 
-updatePhaseStatus();syncStartRoundGuard(null);updateHostActionState();updateAutoRefreshUi();
+updatePhaseStatus();syncStartRoundGuard(null);updateHostActionState();updateAutoRefreshUi();updateLastRefreshStatus();
 if(restoreHostContext()){updatePhaseStatus();if(autoRefreshEnabled){startAutoRefresh();}sessionDetail();}else{saveHostContext();}
 </script>
 </body></html>
diff --git a/lobby/tests.py b/lobby/tests.py
index 8b8e785..880e360 100644
--- a/lobby/tests.py
+++ b/lobby/tests.py
@@ -794,6 +794,12 @@ class UiScreenTests(TestCase):
         self.assertContains(response, "hostActionInFlight")
         self.assertContains(response, "withHostActionLock")
         self.assertContains(response, "Handling kører… afvent svar før næste klik.")
+        self.assertContains(response, "Session-data ikke opdateret endnu.")
+        self.assertContains(response, "Sidst opdateret:")
+        self.assertContains(response, "Session-data kan være forældet")
+        self.assertContains(response, "markSessionRefresh")
+        self.assertContains(response, "updateLastRefreshStatus")
+        self.assertContains(response, "isSessionDetailRead")
         self.assertContains(response, "showQuestionBtn.disabled=hostActionInFlight||!hasCode||phase!==")
         self.assertContains(response, "categorySelect.disabled=hostActionInFlight||!hasCode||phase!==")