Keep chat content visible during reload to prevent layout jump

room_cal/vue/calendar.html

@@ -1335,7 +1335,7 @@
               <button class="chat-reload-btn" @click="loadChat" :disabled="chatLoading" title="Refresh messages">↺</button>
             </div>
           </div>
-          <div v-if="chatLoading" class="chat-status">Loading…</div>
+          <div v-if="chatLoading && !chatThread" class="chat-status">Loading…</div>
           <div v-else-if="chatError" class="chat-status chat-error-txt">{{ chatError }}</div>
           <template v-else-if="chatThread">
             <div class="chat-messages" ref="chatMessagesEl">