Admin-Chat: neue Unterhaltung mit jedem Kunden starten

Ueber der Chat-Liste sucht ein Feld alle Kunden (Name, E-Mail,
Kd.-Nr.) und oeffnet einen leeren Chat, auch wenn der Kunde noch
nie geschrieben hat. Der Server konnte das schon.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

public/admin.html

@@ -64,6 +64,7 @@
     }
     .chat-layout { display: grid; grid-template-columns: 280px 1fr; gap: 14px; min-height: 480px; }
     @media (max-width: 760px) { .chat-layout { grid-template-columns: 1fr; } }
+    .chat-side { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
     .chat-list { border: 1px solid rgba(255,255,255,0.1); border-radius: 12px; overflow-y: auto; max-height: 560px; }
     .chat-list-item { padding: 12px 14px; border-bottom: 1px solid rgba(255,255,255,0.07); cursor: pointer; }
     .chat-list-item:hover { background: rgba(255,255,255,0.05); }
@@ -220,8 +221,13 @@
     <!-- Chat -->
     <section class="admin-section" id="tab-chat">
       <div class="chat-layout">
-        <div class="chat-list" id="admin-chat-list">
-          <div class="chat-list-item"><span class="muted">Lade Unterhaltungen…</span></div>
+        <div class="chat-side">
+          <input class="credit-input" id="admin-chat-new" list="admin-chat-new-list" autocomplete="off"
+            placeholder="Neue Nachricht an Kunde…" aria-label="Neue Nachricht an Kunde">
+          <datalist id="admin-chat-new-list"></datalist>
+          <div class="chat-list" id="admin-chat-list">
+            <div class="chat-list-item"><span class="muted">Lade Unterhaltungen…</span></div>
+          </div>
         </div>
         <div class="chat-thread" id="admin-chat-thread">
           <div class="chat-empty">Unterhaltung links auswählen</div>