refactor: normalize group session keys

apps/android/app/src/main/java/com/steipete/clawdis/node/chat/ChatController.kt

@@ -469,7 +469,8 @@ class ChatController(
       val key = obj["key"].asStringOrNull()?.trim().orEmpty()
       if (key.isEmpty()) return@mapNotNull null
       val updatedAt = obj["updatedAt"].asLongOrNull()
-      ChatSessionEntry(key = key, updatedAtMs = updatedAt)
+      val displayName = obj["displayName"].asStringOrNull()?.trim()
+      ChatSessionEntry(key = key, updatedAtMs = updatedAt, displayName = displayName)
     }
   }
 

apps/android/app/src/main/java/com/steipete/clawdis/node/chat/ChatModels.kt

@@ -25,6 +25,7 @@ data class ChatPendingToolCall(
 data class ChatSessionEntry(
   val key: String,
   val updatedAtMs: Long?,
+  val displayName: String? = null,
 )
 
 data class ChatHistory(

apps/android/app/src/main/java/com/steipete/clawdis/node/ui/chat/ChatComposer.kt

@@ -62,6 +62,8 @@ fun ChatComposer(
   var showSessionMenu by remember { mutableStateOf(false) }
 
   val sessionOptions = resolveSessionChoices(sessionKey, sessions)
+  val currentSessionLabel =
+    sessionOptions.firstOrNull { it.key == sessionKey }?.displayName ?: sessionKey
 
   val canSend = pendingRunCount == 0 && (input.trim().isNotEmpty() || attachments.isNotEmpty()) && healthOk
 
@@ -82,13 +84,13 @@ fun ChatComposer(
             onClick = { showSessionMenu = true },
             contentPadding = ButtonDefaults.ContentPadding,
           ) {
-            Text("Session: $sessionKey")
+            Text("Session: $currentSessionLabel")
           }
 
           DropdownMenu(expanded = showSessionMenu, onDismissRequest = { showSessionMenu = false }) {
             for (entry in sessionOptions) {
               DropdownMenuItem(
-                text = { Text(entry.key) },
+                text = { Text(entry.displayName ?: entry.key) },
                 onClick = {
                   onSelectSession(entry.key)
                   showSessionMenu = false

apps/android/app/src/main/java/com/steipete/clawdis/node/ui/chat/ChatSessionsDialog.kt

@@ -82,7 +82,7 @@ private fun SessionRow(
       verticalAlignment = Alignment.CenterVertically,
       horizontalArrangement = Arrangement.spacedBy(10.dp),
     ) {
-      Text(entry.key, style = MaterialTheme.typography.bodyMedium)
+      Text(entry.displayName ?: entry.key, style = MaterialTheme.typography.bodyMedium)
       Spacer(modifier = Modifier.weight(1f))
       if (isCurrent) {
         Text("Current", style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
@@ -90,4 +90,3 @@ private fun SessionRow(
     }
   }
 }
-