feat: add warning/error message type and skip TTS in voice mode

Add `type: "warning"` to context compression and memory optimization
notifications on the Go server. Propagate messageType through the
Android data layer (Entity → Mapper → Domain) so voice mode can
detect warning/error messages and display them without reading aloud.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

android/core/data/src/main/java/io/picoclaw/android/core/data/local/entity/MessageEntity.kt

@@ -10,5 +10,6 @@ data class MessageEntity(
     val sender: String,
     val imagePathList: String?,
     val timestamp: Long,
-    val status: String
+    val status: String,
+    val messageType: String? = null
 )

android/core/data/src/main/java/io/picoclaw/android/core/data/mapper/MessageMapper.kt

@@ -36,7 +36,8 @@ object MessageMapper {
             sender = MessageSender.valueOf(entity.sender),
             images = images,
             timestamp = entity.timestamp,
-            status = MessageStatus.valueOf(entity.status)
+            status = MessageStatus.valueOf(entity.status),
+            messageType = entity.messageType
         )
     }
 
@@ -47,7 +48,8 @@ object MessageMapper {
             sender = MessageSender.AGENT.name,
             imagePathList = null,
             timestamp = System.currentTimeMillis(),
-            status = MessageStatus.RECEIVED.name
+            status = MessageStatus.RECEIVED.name,
+            messageType = dto.type
         )
     }
 

android/core/domain/src/main/java/io/picoclaw/android/core/domain/model/ChatMessage.kt

@@ -6,7 +6,8 @@ data class ChatMessage(
     val sender: MessageSender,
     val images: List<ImageData> = emptyList(),
     val timestamp: Long,
-    val status: MessageStatus
+    val status: MessageStatus,
+    val messageType: String? = null
 )
 
 enum class MessageSender { USER, AGENT }

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/voice/VoiceModeManager.kt

@@ -97,11 +97,15 @@ class VoiceModeManager(
                         msg.status == MessageStatus.RECEIVED
                     ) {
                         spokenIds.add(msg.id)
+                        if (msg.messageType == "warning" || msg.messageType == "error") {
+                            _state.update { it.copy(responseText = msg.content) }
+                        } else {
                             speechQueue.send(msg.content)
                         }
                     }
                 }
             }
+        }
 
         try {
             while (isActive) {

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/voice/VoiceModeOverlay.kt

@@ -144,7 +144,7 @@ fun VoiceModeOverlay(
                     )
                 }
 
-                if (state.responseText.isNotEmpty() && state.phase == VoicePhase.SPEAKING) {
+                if (state.responseText.isNotEmpty() && (state.phase == VoicePhase.SPEAKING || state.phase == VoicePhase.THINKING)) {
                     Spacer(modifier = Modifier.height(16.dp))
                     Text(
                         text = state.responseText,

pkg/agent/loop.go

@@ -663,6 +663,7 @@ func (al *AgentLoop) runLLMIteration(ctx context.Context, messages []providers.M
 						Channel: opts.Channel,
 						ChatID:  opts.ChatID,
 						Content: "⚠️ Context window exceeded. Compressing history and retrying...",
+						Type:    "warning",
 					})
 				}
 
@@ -947,6 +948,7 @@ func (al *AgentLoop) maybeSummarize(sessionKey, channel, chatID string) {
 						Channel: channel,
 						ChatID:  chatID,
 						Content: "⚠️ Memory threshold reached. Optimizing conversation history...",
+						Type:    "warning",
 					})
 				}
 				al.summarizeSession(sessionKey)