chore: release v1.0.7

Playout: slate fallback, strict ffprobe validation, Prometheus metrics
Chat: history on join, DM offline delivery, env-config rate limits,
  Redis auto-reconnect, heartbeat, ban/mute enforcement, DM metrics
Viewer: presence indicators, schedule overlay, public /api/schedule
Admin: playlist drag-reorder, schedule overrides CRUD, user actions,
  inline mod buttons, CSV export, config editor, restart buttons,
  upload normalization gate, analytics time range
nginx: CORS preflight, JSON health, stub_status
Docs: test-lab vs production distinction across all configs/docs
Infra: Redis maxmemory, CD health IP-agnostic, slate volume mount

frontend/index.html

@@ -24,6 +24,10 @@
     <section class="viewer-content" aria-label="Live stream and chat layout">
       <section class="player-stage" aria-label="Video stage">
         <video id="player" class="player" controls autoplay muted playsinline></video>
+        <div id="now-playing" class="now-playing-overlay" aria-live="polite">
+          <span id="np-title">Loading...</span>
+          <span id="np-next" class="np-next"></span>
+        </div>
       </section>
 
       <aside id="chat-panel" class="chat-sidebar" aria-label="Chat panel">
@@ -37,6 +41,10 @@
 
         <section id="messages" class="chat-messages" aria-live="polite" aria-label="Message stream"></section>
 
+        <section id="presence-panel" class="presence-panel" aria-label="Online users">
+          <div id="presence-list" class="presence-list"></div>
+        </section>
+
         <div class="chat-input-area">
           <div class="chat-input-row">
             <label for="message-input" class="sr-only">Message input</label>