chat list: clear the stale "message deleted" label when a newer message arrives

The sidebar shows "This message was deleted" whenever a row's last_deleted flag is
set, but the new-message handlers (incoming, my-sent, edit) updated the preview text
and never cleared last_deleted. So once a conversation's last message had been deleted
(server-computed last_deleted=true at load), a NEWER message left the flag stale and
the list kept showing "deleted"/"you deleted this" even though the actual last message
was a normal one. Remote deletes already self-corrected via onChatDeleted->loadSidebar;
this was the in-session new-message path. Now last_deleted is cleared wherever a fresh
non-deleted message becomes the row's last message. Web-only; live on next app launch.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/public/home.html

@@ -2437,7 +2437,7 @@ async function saveEdit(text){
     const t=THREAD.find(x=>x.id===m.id); if(t){ t.body=text; t.edited_at=Date.now(); updateBubble(t); }
     THREAD_CACHE.forEach(arr=>arr.forEach(x=>{ if(x.id===m.id){ x.body=text; x.edited_at=Date.now(); } }));
     // keep the chat-list preview in sync if this was the last message
-    const it=rowFor(selected.kind, selected.id); if(it && it.last_from_me){ const last=THREAD[THREAD.length-1]; if(last && last.id===m.id){ it.last_body=text; renderChats(searchVal()); } }
+    const it=rowFor(selected.kind, selected.id); if(it && it.last_from_me){ const last=THREAD[THREAD.length-1]; if(last && last.id===m.id){ it.last_body=text; it.last_deleted=false; renderChats(searchVal()); } }
   }catch(e){ toast(e.message||'Could not edit'); }
 }
 // A message I can see was edited by its sender → update it in place (thread + cache + list preview).
@@ -3892,7 +3892,7 @@ async function sendMessage(){
       if(!THREAD.some(x=>x.id===m.id)){ THREAD.push(m); appendBubble(m); }
       { const ck=selected.kind+':'+selected.id; if(THREAD_CACHE.has(ck)){ const a=THREAD_CACHE.get(ck); if(!a.some(x=>x.id===m.id)) a.push(m); } }
       const it=rowFor(selected.kind,selected.id);
-      if(it){ it.last_body=m.body||(m.attachment?'📎 '+(m.attachment.name||'Attachment'):''); it.last_at=m.created_at; it.last_from_me=true; it.last_status='sent'; it.last_msg_id=m.id; it.unread=0; }
+      if(it){ it.last_body=m.body||(m.attachment?'📎 '+(m.attachment.name||'Attachment'):''); it.last_at=m.created_at; it.last_from_me=true; it.last_status='sent'; it.last_msg_id=m.id; it.unread=0; it.last_deleted=false; } // clear any stale "deleted" list label — this fresh message is the new last one
     }catch(e){ toast(e.message||'Could not send'); if(j.body && !inp.value){ inp.value=j.body; try{ autoGrow(inp); }catch(_){} } }
   }
   composeMentions=new Map();
@@ -4558,7 +4558,7 @@ function onChatMessage(m){
     else if(kind==='dm' && wasNew) addNotif({icon:'chat', text:'New chat from '+pEsc(m.fromName||'someone'), link:{kind:'dm', id:rid}});
   }
   if(it){
-    it.last_body=isSys?m.body:(m.body||(m.attachment?'📎 '+(m.attachment.name||'Attachment'):'')); it.last_at=m.created_at; it.last_from_me=(m.from===ME.id);
+    it.last_body=isSys?m.body:(m.body||(m.attachment?'📎 '+(m.attachment.name||'Attachment'):'')); it.last_at=m.created_at; it.last_from_me=(m.from===ME.id); it.last_deleted=false; // a fresh message means the last message is no longer a deleted one — clear the stale "deleted" list label
     // #6: the server echoes my own sent message back — don't let that echo DOWNGRADE a delivered/read
     // tick that already arrived for this same message (it would flip the list back to a single tick).
     if(m.from===ME.id){ if(!(it.last_msg_id===m.id && (it.last_status==='delivered'||it.last_status==='read'))) it.last_status='sent'; it.last_msg_id=m.id; }