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/dashboard.html

@@ -4,6 +4,12 @@
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>Biz Connect — Dashboard</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:#fff; --line:#e6e9ef; --green:#16a34a; --red:#b91c1c; }
   *{box-sizing:border-box;}