feat(ui): add Ctrl/Cmd+L to send selected text to chat

Bind mod+l to append the current selection into the chat composer
(Cursor-style), and move session sidebar toggle to mod+alt+l so desktop
menus stay in sync. Closes #208.

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>

packages/ui/src/hooks/useKeyboardShortcuts.ts

@@ -16,6 +16,7 @@ import { useDirectoryStore } from '@/stores/useDirectoryStore';
 import { useProjectsStore } from '@/stores/useProjectsStore';
 import { getCycledPrimaryAgentName } from '@/components/chat/mobileControlsUtils';
 import { focusChatInput } from '@/components/chat/composer/editor/dom';
+import { addSelectionToChat } from '@/lib/addSelectionToChat';
 import { hasOpenDropdown } from './keyboard-shortcut-dom';
 
 export const useKeyboardShortcuts = () => {
@@ -337,6 +338,12 @@ export const useKeyboardShortcuts = () => {
         return;
       }
 
+      if (eventMatchesShortcut(e, combo('add_selection_to_chat'))) {
+        e.preventDefault();
+        addSelectionToChat();
+        return;
+      }
+
       if (eventMatchesShortcut(e, combo('toggle_sidebar'))) {
         e.preventDefault();
         const { isMobile, isSessionSwitcherOpen } = useUIStore.getState();