feat: Add TURN server support

toju-app/src/app/features/room/rooms-side-panel/rooms-side-panel.component.html

@@ -189,6 +189,14 @@
                         [ringClass]="getVoiceUserRingClass(u)"
                       />
                       <span class="text-sm text-foreground/80 truncate flex-1">{{ u.displayName }}</span>
+                      <!-- Connectivity warning -->
+                      @if (hasConnectivityIssue(u)) {
+                        <ng-icon
+                          name="lucideAlertTriangle"
+                          class="w-3.5 h-3.5 text-amber-500 shrink-0"
+                          title="Connection issue - this user may not hear all participants. Consider adding a TURN server in Settings -> Network."
+                        />
+                      }
                       <!-- Ping latency indicator -->
                       @if (u.id !== currentUser()?.id) {
                         <span
@@ -399,6 +407,15 @@
 
   <!-- Voice controls pinned to sidebar bottom (hidden when floating controls visible) -->
   @if (panelMode() === 'channels' && showVoiceControls() && voiceEnabled()) {
+    @if (localUserHasDesync()) {
+      <div class="mx-2 mb-1 flex items-center gap-2 rounded-md bg-amber-500/15 px-3 py-2 text-xs text-amber-400">
+        <ng-icon
+          name="lucideAlertTriangle"
+          class="w-4 h-4 shrink-0"
+        />
+        <span>You may have connectivity issues. Adding a TURN server in Settings -> Network may help.</span>
+      </div>
+    }
     <div
       class="border-t border-border px-2 py-3"
       [class.invisible]="showFloatingControls()"