feat(editor): enhance EditorManager with card-based editor functionality

- Introduced methods to determine if an editor is card-based and to retrieve its category.
- Implemented a sidebar toggle shortcut (Ctrl+B) for managing card visibility.
- Added functionality to hide current editor cards when switching editors.
- Updated editor initialization to register global shortcuts for activating specific editors.
- Enhanced the Update method to draw a sidebar for the current category editor.

Benefits:
- Improved user experience by organizing editor cards and providing quick access to editor categories.
- Streamlined editor management, making it easier to switch between different editing contexts.

src/app/gui/editor_card_manager.h

@@ -75,6 +75,18 @@ class EditorCardManager {
   
   // Registration
   void RegisterCard(const CardInfo& info);
+  
+  // Register card with centralized visibility management (preferred method)
+  void RegisterCard(const std::string& card_id,
+                   const std::string& display_name,
+                   const std::string& icon,
+                   const std::string& category,
+                   const std::string& shortcut_hint = "",
+                   int priority = 50,
+                   std::function<void()> on_show = nullptr,
+                   std::function<void()> on_hide = nullptr,
+                   bool visible_by_default = false);
+  
   void UnregisterCard(const std::string& card_id);
   void ClearAllCards();
   
@@ -98,6 +110,15 @@ class EditorCardManager {
   void DrawViewMenuSection(const std::string& category);
   void DrawViewMenuAll();  // Draw all categories as submenus
   
+  // VSCode-style sidebar (replaces Toolset)
+  void DrawSidebar(const std::string& category);  // Icon-only sidebar for category
+  static constexpr float GetSidebarWidth() { return 48.0f; }
+  
+  // Active editor tracking (based on most recently interacted card)
+  void SetActiveCategory(const std::string& category);
+  std::string GetActiveCategory() const { return active_category_; }
+  bool IsCategoryActive(const std::string& category) const { return active_category_ == category; }
+  
   // Compact inline card control for menu bar
   void DrawCompactCardControl(const std::string& category);  // Shows only active editor's cards
   void DrawInlineCardToggles(const std::string& category);   // Minimal inline checkboxes
@@ -135,7 +156,9 @@ class EditorCardManager {
   EditorCardManager& operator=(const EditorCardManager&) = delete;
   
   std::unordered_map<std::string, CardInfo> cards_;
+  std::unordered_map<std::string, bool> centralized_visibility_;  // Centralized card visibility flags
   std::unordered_map<std::string, WorkspacePreset> presets_;
+  std::string active_category_;  // Currently active editor category (based on last card interaction)
   
   // Helper methods
   void SavePresetsToFile();