feat: Enhance AgentChatWidget with Improved Message Handling and UI Updates

- Updated the AgentChatWidget to manage AI response states, including a new mechanism for handling pending messages and a thinking animation indicator.
- Improved the initialization of embedded labels for resource tools, ensuring labels are loaded only when necessary, enhancing performance and user experience.
- Refined the chat history synchronization process to ensure timely updates in the chat history popup.
- Enhanced the UI layout for better readability and interaction, including adjustments to button styles and spacing for a more polished appearance.

src/app/editor/agent/agent_chat_widget.h

@@ -235,6 +235,11 @@ public:
   // History synchronization
   void SyncHistoryToPopup();
 
+  // AI response state
+  bool waiting_for_response_ = false;
+  float thinking_animation_ = 0.0f;
+  std::string pending_message_;
+  
   // Chat session management
   struct ChatSession {
     std::string id;

src/cli/handlers/agent/tool_commands.cc

@@ -112,14 +112,19 @@ absl::Status HandleResourceListCommand(
     rom = &rom_storage;
   }
 
-  // Initialize embedded labels if not already loaded
-  if (rom->resource_label() && !rom->resource_label()->labels_loaded_) {
-    core::YazeProject project;
-    auto labels_status = project.InitializeEmbeddedLabels();
-    if (labels_status.ok()) {
-      rom->resource_label()->labels_ = project.resource_labels;
-      rom->resource_label()->labels_loaded_ = true;
+  // Initialize embedded labels if needed
+  if (rom->resource_label()) {
+    if (!rom->resource_label()->labels_loaded_ || rom->resource_label()->labels_.empty()) {
+      core::YazeProject project;
+      project.use_embedded_labels = true;
+      auto labels_status = project.InitializeEmbeddedLabels();
+      if (labels_status.ok()) {
+        rom->resource_label()->labels_ = project.resource_labels;
+        rom->resource_label()->labels_loaded_ = true;
+      }
     }
+  } else {
+    return absl::FailedPreconditionError("ROM has no resource label manager");
   }
 
   ResourceContextBuilder context_builder(rom);

src/cli/service/resources/resource_context_builder.cc

@@ -205,7 +205,11 @@ ResourceContextBuilder::GetLabels(const std::string& category) {
   }
   
   auto* label_mgr = rom_->resource_label();
-  if (!label_mgr || !label_mgr->labels_loaded_) {
+  if (!label_mgr) {
+    return absl::FailedPreconditionError("No resource label manager");
+  }
+  
+  if (!label_mgr->labels_loaded_) {
     return absl::FailedPreconditionError("No labels file loaded");
   }