feat: live presence, delivery-tick sync, brand rollout, call fixes, desktop 0.1.3

Live presence (fixes stale in-call/status until refresh — impossible in apps):
- server broadcasts a user's status over the chat socket on connect/disconnect, call
  join/leave, and status change (chat.js broadcastPresence; signaling + routes hooks).
- client onPresence() updates the contact dot + open-chat header live.

Chat delivery ticks (#6): chat-list row now mirrors the thread (delivered→double grey,
read→blue) via a new 'with' field on the delivered relay + onChatRead/onChatDelivered.

Call fixes: no bogus 'host handed over' when a 1:1 call ends (leaveMeeting forced);
branded call-connecting + chat-thread loaders; header subtitle tracks live call state.

Notifications: web notify + sw.js use sender/group DP + brand icon (not old wordmark);
desktop shell drops Web Push so only the single native toast fires (#5).

Brand: master icon/splash/loaders wired everywhere (PWA/favicon/apple-touch/.ico),
branded login (blue + gold CTA), branded toasts (BZToast) on all pages, Electron splash.

Desktop: dev auto-targets localhost (packaged→prod); version 0.1.3 with new multi-size
icon; dropped unused node-notifier; removed home-mockup.html.

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

server/public/share.html

@@ -4,6 +4,12 @@
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>Biz Connect — Share your screen</title>
+<meta name="theme-color" content="#1F3B73">
+<link rel="icon" href="/favicon.ico?v=3" sizes="any">
+<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32.png?v=3">
+<link rel="apple-touch-icon" href="/apple-touch-icon-180.png?v=3">
+<link rel="stylesheet" href="/bizconnect-toast.css">
+<script src="/bizconnect-toast.js"></script>
 <style>
   :root{ --brand:#FFC708; --brand-d:#E0AC00; --blue:#1F3B73; --blue-d:#16294f; --blue-soft:#EAF0FB; --ink:#1f2430; --muted:#6b7280; --bg:#f6f8fb; --card:#ffffff; --line:#e6e9ef; }
   *{box-sizing:border-box;}
@@ -275,8 +281,9 @@ function buildChatPanel(){
 }
 function toggleChat(){const p=document.getElementById('chatPanel');if(!p)return;chatOpen=!chatOpen;p.style.display=chatOpen?'flex':'none';const b=document.getElementById('chatBtn');if(chatOpen){b&&(b.style.background='#475569');const i=document.getElementById('chatInput');if(i)setTimeout(()=>i.focus(),50);}}
 function addChat(msg){const c=document.getElementById('chatMsgs');if(!c)return;const mine=msg.from==='__self';const w=document.createElement('div');w.style.cssText='max-width:85%;padding:.4rem .6rem;border-radius:10px;'+(mine?'align-self:flex-end;background:#EAF0FB;color:#16294f':'align-self:flex-start;background:#f1f5f9;color:#1f2430');w.innerHTML='<div style="font-size:.7rem;opacity:.65;margin-bottom:2px">'+esc(msg.name||'')+'</div>'+esc(msg.text);c.appendChild(w);c.scrollTop=c.scrollHeight;if(!mine)notifyMsg(msg);}
-function notifyMsg(msg){const b=document.getElementById('chatBtn');if(b&&!chatOpen){b.style.background='#FFC708';b.style.color='#1f2430';}toast((msg.name||'Message')+': '+msg.text);try{beep();}catch(_){}if('Notification' in window && Notification.permission==='granted' && (document.hidden||!chatOpen)){try{new Notification('New message from '+(msg.name||'support'),{body:msg.text});}catch(_){}}}
-function toast(text){let t=document.getElementById('msgToast');if(!t){t=document.createElement('div');t.id='msgToast';t.style.cssText='position:fixed;top:18px;left:50%;transform:translateX(-50%);z-index:2147483600;background:#16a34a;color:#fff;padding:.7rem 1.1rem;border-radius:12px;box-shadow:0 10px 26px rgba(0,0,0,.35);font-size:.92rem;font-weight:600;border:2px solid #0c7a36;max-width:82vw;transition:opacity .4s';document.body.appendChild(t);}t.innerHTML='\ud83d\udcac '+text;t.style.opacity='1';clearTimeout(window.__toastT);window.__toastT=setTimeout(()=>{t.style.opacity='0';},2800);}
+function notifyMsg(msg){const b=document.getElementById('chatBtn');if(b&&!chatOpen){b.style.background='#FFC708';b.style.color='#1f2430';}if(window.BZToast)BZToast.message(msg.text,{title:(msg.name||'Message')});try{beep();}catch(_){}if('Notification' in window && Notification.permission==='granted' && (document.hidden||!chatOpen)){try{new Notification('New message from '+(msg.name||'support'),{body:msg.text});}catch(_){}}}
+// Branded toast (BZToast, /bizconnect-toast.js). Classify by wording so errors show red.
+function toast(text){var s=String(text==null?'':text);if(!window.BZToast)return;if(/could ?n.t|cannot|failed|invalid|error|denied|expired|not found|please enter/i.test(s))return BZToast.error(s);return BZToast.message(s);}
 let __ac=null;
 function ensureAudio(){try{__ac=__ac||new (window.AudioContext||window.webkitAudioContext)();if(__ac.state==='suspended')__ac.resume();}catch(_){}}
 function beep(){ensureAudio();if(!__ac)return;try{const o=__ac.createOscillator(),g=__ac.createGain();o.type='sine';o.connect(g);g.connect(__ac.destination);const t0=__ac.currentTime;o.frequency.setValueAtTime(880,t0);o.frequency.setValueAtTime(660,t0+0.09);g.gain.setValueAtTime(0.0001,t0);g.gain.exponentialRampToValueAtTime(0.12,t0+0.02);g.gain.exponentialRampToValueAtTime(0.0001,t0+0.22);o.start(t0);o.stop(t0+0.24);}catch(_){}}