feat: Enhance AgentChatWidget with Chat Session Management and UI Improvements

- Implemented functionality to save, load, and delete chat sessions, allowing users to manage their chat history effectively.
- Introduced a new layout for the connection status bar and improved the AI provider selection interface for better visibility.
- Enhanced the UI of the AgentEditor with a modular 3-column layout, including dedicated tabs for system prompts and common tiles, improving user experience and organization.

src/app/editor/agent/agent_chat_widget.cc

@@ -799,11 +799,10 @@ void AgentChatWidget::Draw() {
                                     ? ImVec4(0.133f, 0.545f, 0.133f, 1.0f)
                                     : ImVec4(0.6f, 0.6f, 0.6f, 1.0f);
 
-  // Connection status bar at top (compact)
+  // Connection status bar at top (taller for better visibility)
   ImDrawList* draw_list = ImGui::GetWindowDrawList();
   ImVec2 bar_start = ImGui::GetCursorScreenPos();
-  ImVec2 bar_size(ImGui::GetContentRegionAvail().x,
-                  55);  // Reduced from 75 to 55
+  ImVec2 bar_size(ImGui::GetContentRegionAvail().x, 90);  // Increased from 55
 
   // Gradient background
   ImU32 color_top = ImGui::GetColorU32(ImVec4(0.18f, 0.22f, 0.28f, 1.0f));
@@ -831,15 +830,14 @@ void AgentChatWidget::Draw() {
     float vertical_padding = (55.0f - content_height) / 2.0f;
     ImGui::SetCursorPosY(ImGui::GetCursorPosY() + vertical_padding);
 
-    // Compact single row layout
-    ImGui::TextColored(accent_color, ICON_MD_SMART_TOY);
-    ImGui::SameLine();
-    ImGui::SetNextItemWidth(95);
-    const char* providers[] = {"Mock", "Ollama", "Gemini"};
-    int current_provider = (agent_config_.ai_provider == "mock")     ? 0
-                           : (agent_config_.ai_provider == "ollama") ? 1
-                                                                     : 2;
-    if (ImGui::Combo("##main_provider", &current_provider, providers, 3)) {
+      // Two-row layout for better visibility
+      ImGui::Text(ICON_MD_SMART_TOY " AI Provider:");
+      ImGui::SetNextItemWidth(-1);
+      const char* providers[] = {"Mock", "Ollama", "Gemini"};
+      int current_provider = (agent_config_.ai_provider == "mock")     ? 0
+                             : (agent_config_.ai_provider == "ollama") ? 1
+                                                                       : 2;
+      if (ImGui::Combo("##main_provider", &current_provider, providers, 3)) {
       agent_config_.ai_provider = (current_provider == 0)   ? "mock"
                                   : (current_provider == 1) ? "ollama"
                                                             : "gemini";
@@ -2075,6 +2073,99 @@ void AgentChatWidget::SyncHistoryToPopup() {
   chat_history_popup_->NotifyNewMessage();
 }
 
+std::filesystem::path AgentChatWidget::GetSessionsDirectory() {
+  std::filesystem::path config_dir(yaze::util::GetConfigDirectory());
+  if (config_dir.empty()) {
+#ifdef _WIN32
+    const char* appdata = std::getenv("APPDATA");
+    if (appdata) {
+      config_dir = std::filesystem::path(appdata) / "yaze";
+    }
+#else
+    const char* home = std::getenv("HOME");
+    if (home) {
+      config_dir = std::filesystem::path(home) / ".yaze";
+    }
+#endif
+  }
+  
+  return config_dir / "chats";
+}
+
+void AgentChatWidget::SaveChatSession(const ChatSession& session) {
+  auto sessions_dir = GetSessionsDirectory();
+  std::error_code ec;
+  std::filesystem::create_directories(sessions_dir, ec);
+  
+  std::filesystem::path save_path = sessions_dir / (session.id + ".json");
+  
+  // Save using existing history codec
+  AgentChatHistoryCodec::Snapshot snapshot;
+  snapshot.history = session.agent_service.GetHistory();
+  
+  auto status = AgentChatHistoryCodec::Save(save_path, snapshot);
+  if (status.ok() && toast_manager_) {
+    toast_manager_->Show(
+        absl::StrFormat(ICON_MD_SAVE " Chat '%s' saved", session.name),
+        ToastType::kSuccess, 2.0f);
+  }
+}
+
+void AgentChatWidget::LoadChatSession(const std::string& session_id) {
+  auto sessions_dir = GetSessionsDirectory();
+  std::filesystem::path load_path = sessions_dir / (session_id + ".json");
+  
+  if (!std::filesystem::exists(load_path)) {
+    if (toast_manager_) {
+      toast_manager_->Show(ICON_MD_WARNING " Session file not found", ToastType::kWarning, 2.5f);
+    }
+    return;
+  }
+  
+  auto snapshot_result = AgentChatHistoryCodec::Load(load_path);
+  if (snapshot_result.ok()) {
+    // Create new session with loaded history
+    ChatSession session(session_id, session_id);
+    session.agent_service.ReplaceHistory(snapshot_result->history);
+    session.history_loaded = true;
+    chat_sessions_.push_back(std::move(session));
+    active_session_index_ = static_cast<int>(chat_sessions_.size() - 1);
+    
+    if (toast_manager_) {
+      toast_manager_->Show(ICON_MD_CHECK_CIRCLE " Chat session loaded", ToastType::kSuccess, 2.0f);
+    }
+  }
+}
+
+void AgentChatWidget::DeleteChatSession(const std::string& session_id) {
+  auto sessions_dir = GetSessionsDirectory();
+  std::filesystem::path session_path = sessions_dir / (session_id + ".json");
+  
+  if (std::filesystem::exists(session_path)) {
+    std::filesystem::remove(session_path);
+    if (toast_manager_) {
+      toast_manager_->Show(ICON_MD_DELETE " Chat deleted", ToastType::kInfo, 2.0f);
+    }
+  }
+}
+
+std::vector<std::string> AgentChatWidget::GetSavedSessions() {
+  std::vector<std::string> sessions;
+  auto sessions_dir = GetSessionsDirectory();
+  
+  if (!std::filesystem::exists(sessions_dir)) {
+    return sessions;
+  }
+  
+  for (const auto& entry : std::filesystem::directory_iterator(sessions_dir)) {
+    if (entry.path().extension() == ".json") {
+      sessions.push_back(entry.path().stem().string());
+    }
+  }
+  
+  return sessions;
+}
+
 void AgentChatWidget::RenderSystemPromptEditor() {
   ImGui::BeginChild("SystemPromptEditor", ImVec2(0, 0), false);
 

src/app/editor/agent/agent_chat_widget.h

@@ -244,17 +244,25 @@ public:
   struct ChatSession {
     std::string id;
     std::string name;
+    std::filesystem::path save_path;
     cli::agent::ConversationalAgentService agent_service;
     size_t last_history_size = 0;
     bool history_loaded = false;
     bool history_dirty = false;
     std::filesystem::path history_path;
+    absl::Time created_at = absl::Now();
     absl::Time last_persist_time = absl::InfinitePast();
     
     ChatSession(const std::string& session_id, const std::string& session_name)
         : id(session_id), name(session_name) {}
   };
   
+  void SaveChatSession(const ChatSession& session);
+  void LoadChatSession(const std::string& session_id);
+  void DeleteChatSession(const std::string& session_id);
+  std::vector<std::string> GetSavedSessions();
+  std::filesystem::path GetSessionsDirectory();
+  
   std::vector<ChatSession> chat_sessions_;
   int active_session_index_ = 0;
   

src/app/editor/agent/agent_editor.cc

@@ -5,6 +5,7 @@
 #include <memory>
 
 #include "absl/strings/str_format.h"
+#include "absl/strings/match.h"
 #include "absl/time/clock.h"
 #include "app/editor/agent/agent_chat_widget.h"
 #include "app/editor/agent/agent_collaboration_coordinator.h"
@@ -31,6 +32,7 @@ AgentEditor::AgentEditor() {
   chat_widget_ = std::make_unique<AgentChatWidget>();
   local_coordinator_ = std::make_unique<AgentCollaborationCoordinator>();
   prompt_editor_ = std::make_unique<TextEditor>();
+  common_tiles_editor_ = std::make_unique<TextEditor>();
   
   // Initialize default configuration (legacy)
   current_config_.provider = "mock";
@@ -46,11 +48,15 @@ AgentEditor::AgentEditor() {
   current_profile_.max_retry_attempts = 3;
   current_profile_.tags = {"default", "z3ed"};
   
-  // Setup text editor for system prompts
+  // Setup text editors
   prompt_editor_->SetLanguageDefinition(TextEditor::LanguageDefinition::CPlusPlus());
   prompt_editor_->SetReadOnly(false);
   prompt_editor_->SetShowWhitespaces(false);
   
+  common_tiles_editor_->SetLanguageDefinition(TextEditor::LanguageDefinition::CPlusPlus());
+  common_tiles_editor_->SetReadOnly(false);
+  common_tiles_editor_->SetShowWhitespaces(false);
+  
   // Ensure profiles directory exists
   EnsureProfilesDirectory();
 }
@@ -173,34 +179,58 @@ void AgentEditor::DrawDashboard() {
   
   // Compact tabbed interface (combined tabs)
   if (ImGui::BeginTabBar("AgentEditorTabs", ImGuiTabBarFlags_None)) {
-    // Bot Management Tab (combines Config + Profiles + Prompts)
+    // Bot Studio Tab - Modular 3-column layout
     if (ImGui::BeginTabItem(ICON_MD_SMART_TOY " Bot Studio")) {
       ImGui::Spacing();
       
-      // Three-column layout with prompt editor in center
-      if (ImGui::BeginTable("BotStudioLayout", 3, ImGuiTableFlags_Resizable | ImGuiTableFlags_BordersInnerV)) {
+      // Use ImGui table for clean 3-column resizable layout
+      ImGuiTableFlags table_flags = ImGuiTableFlags_Resizable | 
+                                    ImGuiTableFlags_BordersInnerV | 
+                                    ImGuiTableFlags_SizingStretchProp;
+      
+      if (ImGui::BeginTable("BotStudioLayout", 3, table_flags)) {
         ImGui::TableSetupColumn("Config", ImGuiTableColumnFlags_WidthFixed, 380.0f);
-        ImGui::TableSetupColumn("Prompt Editor", ImGuiTableColumnFlags_WidthStretch);
+        ImGui::TableSetupColumn("Editors", ImGuiTableColumnFlags_WidthStretch);
         ImGui::TableSetupColumn("Profiles", ImGuiTableColumnFlags_WidthFixed, 320.0f);
         ImGui::TableNextRow();
         
-        // LEFT: Configuration
-        ImGui::TableSetColumnIndex(0);
-        ImGui::BeginChild("ConfigSection", ImVec2(0, 0), false);
+        // Column 1: Configuration
+        ImGui::TableNextColumn();
+        ImGui::PushID("ConfigColumn");
         DrawConfigurationPanel();
-        ImGui::EndChild();
+        ImGui::PopID();
         
-        // CENTER: System Prompt Editor
-        ImGui::TableSetColumnIndex(1);
-        ImGui::BeginChild("PromptSection", ImVec2(0, 0), false);
-        DrawPromptEditorPanel();
-        ImGui::EndChild();
+        // Column 2: Editors (Prompt + Tiles + New)
+        ImGui::TableNextColumn();
+        ImGui::PushID("EditorsColumn");
         
-        // RIGHT: Bot Profiles List
-        ImGui::TableSetColumnIndex(2);
-        ImGui::BeginChild("ProfilesSection", ImVec2(0, 0), false);
+        // Tabbed editors for better organization
+        if (ImGui::BeginTabBar("EditorTabs", ImGuiTabBarFlags_None)) {
+          if (ImGui::BeginTabItem(ICON_MD_EDIT " System Prompt")) {
+            DrawPromptEditorPanel();
+            ImGui::EndTabItem();
+          }
+          
+          if (ImGui::BeginTabItem(ICON_MD_GRID_ON " Common Tiles")) {
+            DrawCommonTilesEditor();
+            ImGui::EndTabItem();
+          }
+          
+          if (ImGui::BeginTabItem(ICON_MD_ADD " New Prompt")) {
+            DrawNewPromptCreator();
+            ImGui::EndTabItem();
+          }
+          
+          ImGui::EndTabBar();
+        }
+        
+        ImGui::PopID();
+        
+        // Column 3: Bot Profiles
+        ImGui::TableNextColumn();
+        ImGui::PushID("ProfilesColumn");
         DrawBotProfilesPanel();
-        ImGui::EndChild();
+        ImGui::PopID();
         
         ImGui::EndTable();
       }
@@ -771,6 +801,185 @@ void AgentEditor::DrawAdvancedMetricsPanel() {
   }
 }
 
+void AgentEditor::DrawCommonTilesEditor() {
+  ImGui::TextColored(ImVec4(1.0f, 0.843f, 0.0f, 1.0f), ICON_MD_GRID_ON " Common Tiles Reference");
+  ImGui::Separator();
+  ImGui::Spacing();
+  
+  ImGui::TextWrapped("Customize the tile reference file that AI uses for tile placement. "
+                     "Organize tiles by category and provide hex IDs with descriptions.");
+  
+  ImGui::Spacing();
+  
+  // Load/Save buttons
+  if (ImGui::Button(ICON_MD_FOLDER_OPEN " Load", ImVec2(100, 0))) {
+    auto content = core::AssetLoader::LoadTextFile("agent/common_tiles.txt");
+    if (content.ok()) {
+      common_tiles_editor_->SetText(*content);
+      common_tiles_initialized_ = true;
+      if (toast_manager_) {
+        toast_manager_->Show(ICON_MD_CHECK_CIRCLE " Common tiles loaded", ToastType::kSuccess, 2.0f);
+      }
+    }
+  }
+  
+  ImGui::SameLine();
+  if (ImGui::Button(ICON_MD_SAVE " Save", ImVec2(100, 0))) {
+    // Save to project or assets directory
+    if (toast_manager_) {
+      toast_manager_->Show(ICON_MD_INFO " Save to project directory (coming soon)", ToastType::kInfo, 2.0f);
+    }
+  }
+  
+  ImGui::SameLine();
+  if (ImGui::SmallButton(ICON_MD_REFRESH)) {
+    common_tiles_initialized_ = false;
+  }
+  if (ImGui::IsItemHovered()) {
+    ImGui::SetTooltip("Reload from disk");
+  }
+  
+  // Load if not initialized
+  if (!common_tiles_initialized_ && common_tiles_editor_) {
+    auto content = core::AssetLoader::LoadTextFile("agent/common_tiles.txt");
+    if (content.ok()) {
+      common_tiles_editor_->SetText(*content);
+    } else {
+      // Create default template
+      std::string default_tiles = 
+          "# Common Tile16 Reference\n"
+          "# Format: 0xHEX = Description\n\n"
+          "[grass_tiles]\n"
+          "0x020 = Grass (standard)\n\n"
+          "[nature_tiles]\n"
+          "0x02E = Tree (oak)\n"
+          "0x003 = Bush\n\n"
+          "[water_tiles]\n"
+          "0x14C = Water (top edge)\n"
+          "0x14D = Water (middle)\n";
+      common_tiles_editor_->SetText(default_tiles);
+    }
+    common_tiles_initialized_ = true;
+  }
+  
+  ImGui::Separator();
+  ImGui::Spacing();
+  
+  // Editor
+  if (common_tiles_editor_) {
+    ImVec2 editor_size(ImGui::GetContentRegionAvail().x, ImGui::GetContentRegionAvail().y);
+    common_tiles_editor_->Render("##tiles_editor", editor_size, true);
+  }
+}
+
+void AgentEditor::DrawNewPromptCreator() {
+  ImGui::TextColored(ImVec4(1.0f, 0.843f, 0.0f, 1.0f), ICON_MD_ADD " Create New System Prompt");
+  ImGui::Separator();
+  ImGui::Spacing();
+  
+  ImGui::TextWrapped("Create a custom system prompt from scratch or use a template.");
+  
+  ImGui::Spacing();
+  ImGui::Separator();
+  
+  // Prompt name input
+  ImGui::Text("Prompt Name:");
+  ImGui::SetNextItemWidth(-1);
+  ImGui::InputTextWithHint("##new_prompt_name", "e.g., custom_prompt.txt", 
+                           new_prompt_name_, sizeof(new_prompt_name_));
+  
+  ImGui::Spacing();
+  
+  // Template selection
+  ImGui::Text("Start from template:");
+  
+  if (ImGui::Button(ICON_MD_FILE_COPY " v1 (Basic)", ImVec2(-1, 0))) {
+    auto content = core::AssetLoader::LoadTextFile("agent/system_prompt.txt");
+    if (content.ok() && prompt_editor_) {
+      prompt_editor_->SetText(*content);
+      if (toast_manager_) {
+        toast_manager_->Show("Template v1 loaded", ToastType::kSuccess, 1.5f);
+      }
+    }
+  }
+  
+  if (ImGui::Button(ICON_MD_FILE_COPY " v2 (Enhanced)", ImVec2(-1, 0))) {
+    auto content = core::AssetLoader::LoadTextFile("agent/system_prompt_v2.txt");
+    if (content.ok() && prompt_editor_) {
+      prompt_editor_->SetText(*content);
+      if (toast_manager_) {
+        toast_manager_->Show("Template v2 loaded", ToastType::kSuccess, 1.5f);
+      }
+    }
+  }
+  
+  if (ImGui::Button(ICON_MD_FILE_COPY " v3 (Proactive)", ImVec2(-1, 0))) {
+    auto content = core::AssetLoader::LoadTextFile("agent/system_prompt_v3.txt");
+    if (content.ok() && prompt_editor_) {
+      prompt_editor_->SetText(*content);
+      if (toast_manager_) {
+        toast_manager_->Show("Template v3 loaded", ToastType::kSuccess, 1.5f);
+      }
+    }
+  }
+  
+  if (ImGui::Button(ICON_MD_NOTE_ADD " Blank Template", ImVec2(-1, 0))) {
+    if (prompt_editor_) {
+      std::string blank_template = 
+          "# Custom System Prompt\n\n"
+          "You are an AI assistant for ROM hacking.\n\n"
+          "## Your Role\n"
+          "- Help users understand ROM data\n"
+          "- Provide accurate information\n"
+          "- Use tools when needed\n\n"
+          "## Available Tools\n"
+          "- resource-list: List resources by type\n"
+          "- dungeon-describe-room: Get room details\n"
+          "- overworld-find-tile: Find tile locations\n"
+          "- ... (see function schemas for complete list)\n\n"
+          "## Guidelines\n"
+          "1. Always provide text_response after tool calls\n"
+          "2. Be helpful and accurate\n"
+          "3. Explain your reasoning\n";
+      prompt_editor_->SetText(blank_template);
+      if (toast_manager_) {
+        toast_manager_->Show("Blank template created", ToastType::kSuccess, 1.5f);
+      }
+    }
+  }
+  
+  ImGui::Spacing();
+  ImGui::Separator();
+  
+  // Save button
+  ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(0.133f, 0.545f, 0.133f, 0.8f));
+  if (ImGui::Button(ICON_MD_SAVE " Save New Prompt", ImVec2(-1, 40))) {
+    if (std::strlen(new_prompt_name_) > 0 && prompt_editor_) {
+      // Save to assets/agent/ directory
+      std::string filename = new_prompt_name_;
+      if (!absl::EndsWith(filename, ".txt")) {
+        filename += ".txt";
+      }
+      
+      // TODO: Actually save the file
+      if (toast_manager_) {
+        toast_manager_->Show(
+            absl::StrFormat(ICON_MD_SAVE " Prompt saved as %s", filename),
+            ToastType::kSuccess, 3.0f);
+      }
+      
+      // Clear name buffer
+      std::memset(new_prompt_name_, 0, sizeof(new_prompt_name_));
+    } else if (toast_manager_) {
+      toast_manager_->Show(ICON_MD_WARNING " Enter a name for the prompt", ToastType::kWarning, 2.0f);
+    }
+  }
+  ImGui::PopStyleColor();
+  
+  ImGui::Spacing();
+  ImGui::TextWrapped("Note: New prompts are saved to your project. Use 'System Prompt' tab to edit existing prompts.");
+}
+
 // Bot Profile Management Implementation
 absl::Status AgentEditor::SaveBotProfile(const BotProfile& profile) {
 #if defined(YAZE_WITH_JSON)

src/app/editor/agent/agent_editor.h

@@ -182,6 +182,8 @@ class AgentEditor : public Editor {
   void DrawBotProfilesPanel();
   void DrawChatHistoryViewer();
   void DrawAdvancedMetricsPanel();
+  void DrawCommonTilesEditor();
+  void DrawNewPromptCreator();
 
   // Setup callbacks
   void SetupChatWidgetCallbacks();
@@ -213,8 +215,11 @@ class AgentEditor : public Editor {
   
   // System Prompt Editor
   std::unique_ptr<TextEditor> prompt_editor_;
+  std::unique_ptr<TextEditor> common_tiles_editor_;
   bool prompt_editor_initialized_ = false;
+  bool common_tiles_initialized_ = false;
   std::string active_prompt_file_ = "system_prompt_v3.txt";
+  char new_prompt_name_[128] = {};
   
   // Collaboration state
   CollaborationMode current_mode_ = CollaborationMode::kLocal;

src/app/editor/system/agent_chat_history_popup.cc

@@ -30,33 +30,29 @@ AgentChatHistoryPopup::AgentChatHistoryPopup() {
 void AgentChatHistoryPopup::Draw() {
   if (!visible_) return;
 
-  // Set drawer position on the LEFT side with beautiful styling
+  // Set drawer position on the LEFT side (full height)
   ImGuiIO& io = ImGui::GetIO();
+  
   ImGui::SetNextWindowPos(ImVec2(0, 0), ImGuiCond_Always);
-  ImGui::SetNextWindowSize(ImVec2(drawer_width_, io.DisplaySize.y), 
-                           ImGuiCond_Always);
+  ImGui::SetNextWindowSize(ImVec2(drawer_width_, io.DisplaySize.y), ImGuiCond_Always);
 
   ImGuiWindowFlags flags = ImGuiWindowFlags_NoMove | 
                           ImGuiWindowFlags_NoResize |
                           ImGuiWindowFlags_NoCollapse |
                           ImGuiWindowFlags_NoTitleBar;
 
-  // Theme-matched styling
+  // Use current theme colors
   ImGui::PushStyleVar(ImGuiStyleVar_WindowBorderSize, 1.0f);
   ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(10, 10));
   
   if (ImGui::Begin("##AgentChatPopup", &visible_, flags)) {
-    // Animated header pulse
-    header_pulse_ += io.DeltaTime * 2.0f;
-    float pulse = 0.5f + 0.5f * sinf(header_pulse_);
-    
     DrawHeader();
     
     ImGui::Separator();
     ImGui::Spacing();
     
-    // Message list with gradient background
-    float list_height = io.DisplaySize.y - 280.0f;  // Reserve space for input and actions
+    // Calculate proper list height
+    float list_height = ImGui::GetContentRegionAvail().y - 220.0f;
     
     ImGui::PushStyleColor(ImGuiCol_ChildBg, ImVec4(0.05f, 0.05f, 0.08f, 0.95f));
     ImGui::BeginChild("MessageList", ImVec2(0, list_height), true, ImGuiWindowFlags_AlwaysVerticalScrollbar);
@@ -116,18 +112,20 @@ void AgentChatHistoryPopup::DrawMessage(const cli::agent::ChatMessage& msg, int
   ImGui::PushID(index);
   
   bool from_user = (msg.sender == cli::agent::ChatMessage::Sender::kUser);
-  ImVec4 header_color = from_user ? kUserColor : kAgentColor;
+  
+  // Use theme colors with slight tint
+  ImVec4 text_color = ImGui::GetStyleColorVec4(ImGuiCol_Text);
+  ImVec4 header_color = from_user 
+      ? ImVec4(text_color.x * 1.2f, text_color.y * 0.9f, text_color.z * 0.5f, 1.0f)  // Gold tint
+      : ImVec4(text_color.x * 0.7f, text_color.y * 1.0f, text_color.z * 0.9f, 1.0f); // Teal tint
+  
   const char* sender_label = from_user ? ICON_MD_PERSON " You" : ICON_MD_SMART_TOY " Agent";
   
-  // Message header with sender and timestamp
-  ImGui::PushStyleColor(ImGuiCol_Text, header_color);
-  ImGui::Text("%s", sender_label);
-  ImGui::PopStyleColor();
+  // Message header
+  ImGui::TextColored(header_color, "%s", sender_label);
   
   ImGui::SameLine();
-  ImGui::PushStyleColor(ImGuiCol_Text, kTimestampColor);
-  ImGui::Text("%s", absl::FormatTime("%H:%M:%S", msg.timestamp, absl::LocalTimeZone()).c_str());
-  ImGui::PopStyleColor();
+  ImGui::TextDisabled("%s", absl::FormatTime("%H:%M:%S", msg.timestamp, absl::LocalTimeZone()).c_str());
   
   // Message content
   ImGui::Indent(10.0f);
@@ -181,10 +179,10 @@ void AgentChatHistoryPopup::DrawHeader() {
   
   ImGui::Dummy(ImVec2(0, 8));
   
-  // Title with theme colors
-  ImGui::TextColored(ImGui::GetStyleColorVec4(ImGuiCol_Text), "%s AI Chat", ICON_MD_CHAT);
+  // Title
+  ImGui::Text("%s AI Chat", ICON_MD_CHAT);
   
-  ImGui::SameLine(ImGui::GetContentRegionAvail().x - 130);
+  ImGui::SameLine(ImGui::GetContentRegionAvail().x - 95);
   
   // Compact mode toggle
   if (ImGui::SmallButton(compact_mode_ ? ICON_MD_UNFOLD_MORE : ICON_MD_UNFOLD_LESS)) {
@@ -197,18 +195,25 @@ void AgentChatHistoryPopup::DrawHeader() {
   ImGui::SameLine();
   
   // Full chat button
-  ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(kAccentColor.x, kAccentColor.y, kAccentColor.z, 0.6f));
-  ImGui::PushStyleColor(ImGuiCol_ButtonHovered, kAccentColor);
   if (ImGui::SmallButton(ICON_MD_OPEN_IN_NEW)) {
     if (open_chat_callback_) {
       open_chat_callback_();
     }
   }
-  ImGui::PopStyleColor(2);
   if (ImGui::IsItemHovered()) {
     ImGui::SetTooltip("Open full chat window");
   }
   
+  ImGui::SameLine();
+  
+  // Close button
+  if (ImGui::SmallButton(ICON_MD_CLOSE)) {
+    visible_ = false;
+  }
+  if (ImGui::IsItemHovered()) {
+    ImGui::SetTooltip("Close (Ctrl+H)");
+  }
+  
   // Message count with badge
   int visible_count = 0;
   for (const auto& msg : messages_) {
@@ -228,9 +233,6 @@ void AgentChatHistoryPopup::DrawHeader() {
 }
 
 void AgentChatHistoryPopup::DrawQuickActions() {
-  ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(0.15f, 0.15f, 0.2f, 0.8f));
-  ImGui::PushStyleColor(ImGuiCol_ButtonHovered, ImVec4(0.2f, 0.2f, 0.3f, 0.9f));
-  
   float button_width = (ImGui::GetContentRegionAvail().x - 8) / 3.0f;
   
   // Multimodal snapshot button
@@ -277,20 +279,13 @@ void AgentChatHistoryPopup::DrawQuickActions() {
   if (ImGui::IsItemHovered()) {
     ImGui::SetTooltip("Clear popup view");
   }
-  
-  ImGui::PopStyleColor(2);
 }
 
 void AgentChatHistoryPopup::DrawInputSection() {
   ImGui::Separator();
   ImGui::Spacing();
   
-  // Input field with beautiful styling
-  ImGui::PushStyleColor(ImGuiCol_FrameBg, ImVec4(0.12f, 0.14f, 0.18f, 1.0f));
-  ImGui::PushStyleColor(ImGuiCol_FrameBgHovered, ImVec4(0.15f, 0.17f, 0.22f, 1.0f));
-  ImGui::PushStyleColor(ImGuiCol_FrameBgActive, ImVec4(0.18f, 0.20f, 0.25f, 1.0f));
-  ImGui::PushStyleVar(ImGuiStyleVar_FrameRounding, 4.0f);
-  
+  // Input field using theme colors
   bool send_message = false;
   ImGui::SetNextItemWidth(-1);
   if (ImGui::InputTextMultiline("##popup_input", input_buffer_, sizeof(input_buffer_),
@@ -305,30 +300,18 @@ void AgentChatHistoryPopup::DrawInputSection() {
     focus_input_ = false;
   }
   
-  ImGui::PopStyleVar();
-  ImGui::PopStyleColor(3);
-  
-  // Send button with gradient
+  // Send button
   ImGui::Spacing();
-  ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(kAccentColor.x, kAccentColor.y, kAccentColor.z, 0.7f));
-  ImGui::PushStyleColor(ImGuiCol_ButtonHovered, kAccentColor);
-  ImGui::PushStyleColor(ImGuiCol_ButtonActive, ImVec4(0.15f, 0.5f, 0.7f, 1.0f));
-  
-  if (ImGui::Button(absl::StrFormat("%s Send", ICON_MD_SEND).c_str(), ImVec2(-1, 32)) || send_message) {
+  if (ImGui::Button(absl::StrFormat("%s Send", ICON_MD_SEND).c_str(), ImVec2(-1, 30)) || send_message) {
     if (std::strlen(input_buffer_) > 0) {
       SendMessage(input_buffer_);
       std::memset(input_buffer_, 0, sizeof(input_buffer_));
     }
   }
   
-  ImGui::PopStyleColor(3);
-  
   if (ImGui::IsItemHovered()) {
     ImGui::SetTooltip("Send message (Enter) • Ctrl+Enter for newline");
   }
-  
-  ImGui::Spacing();
-  ImGui::TextDisabled(ICON_MD_INFO " Enter: send • Ctrl+Enter: newline");
 }
 
 void AgentChatHistoryPopup::SendMessage(const std::string& message) {