diff --git a/server/public/home.html b/server/public/home.html
index 8bedb1d..f36eaee 100644
--- a/server/public/home.html
+++ b/server/public/home.html
@@ -788,7 +788,7 @@
-
@@ -2228,7 +2228,29 @@ let chatWs=null, _chatConnectedOnce=false;
// handled by boot's loadSidebar, so we skip the resync then.
function resyncChat(){
try{ loadSidebar(); }catch(_){}
- if(selected && currentTab()==='chat'){ const s=selected; try{ openConvo(s.kind, s.id); }catch(_){} }
+ refreshOpenThread(); // NON-destructive catch-up (never wipes the open thread — see below)
+}
+// Re-fetch the open conversation and MERGE: add messages missed while disconnected + refresh
+// read/delivered/seen/edited/deleted flags, but NEVER remove messages already shown. openConvo
+// replaced THREAD wholesale, which could momentarily blank a chat (e.g. a just-sent message) if the
+// reload raced or returned stale — the cause of the "messages disappear after sending" report.
+async function refreshOpenThread(){
+ if(!selected || currentTab()!=='chat') return;
+ const kind=selected.kind, id=selected.id;
+ const url=kind==='group'?('/api/messages/thread?group='+encodeURIComponent(id)):('/api/messages/thread?with='+encodeURIComponent(id));
+ let msgs; try{ msgs=await fetch(url).then(r=>r.json()); }catch(_){ return; }
+ if(!Array.isArray(msgs)) return;
+ if(!selected||selected.kind!==kind||selected.id!==id) return; // switched away while fetching
+ const byId=new Map(THREAD.map(m=>[m.id,m])); let changed=false;
+ msgs.forEach(nm=>{ const ex=byId.get(nm.id);
+ if(!ex){ THREAD.push(nm); changed=true; return; }
+ if(nm.read_at&&!ex.read_at){ ex.read_at=nm.read_at; changed=true; }
+ if(nm.delivered_at&&!ex.delivered_at){ ex.delivered_at=nm.delivered_at; changed=true; }
+ if(nm.deleted&&!ex.deleted){ ex.deleted=true; ex.body=''; ex.attachment=null; ex.reactions=[]; changed=true; }
+ if(nm.edited_at&&nm.edited_at!==ex.edited_at){ ex.edited_at=nm.edited_at; ex.body=nm.body; changed=true; }
+ if(JSON.stringify(nm.seenBy||[])!==JSON.stringify(ex.seenBy||[])){ ex.seenBy=nm.seenBy||[]; changed=true; }
+ });
+ if(changed){ THREAD.sort((a,b)=>(a.created_at||0)-(b.created_at||0)); THREAD_CACHE.set(kind+':'+id, THREAD.slice()); renderThread(); }
}
function connectChatWs(){
try{