feat: add integrated terminal with tab system and theme support

- Add terminal view with draggable split panels and multi-tab support
- Implement terminal WebSocket server with password protection
- Add per-terminal font size that persists when moving between tabs
- Support all 12 app themes with matching terminal colors
- Add keyboard shortcut (Ctrl+`) to toggle terminal view
- Include scrollback buffer for session history on reconnect

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/app/src/hooks/use-keyboard-shortcuts.ts

@@ -34,6 +34,18 @@ function isInputFocused(): boolean {
     return true;
   }
 
+  // Check if focus is inside an xterm terminal (they use a hidden textarea)
+  const xtermContainer = activeElement.closest(".xterm");
+  if (xtermContainer) {
+    return true;
+  }
+
+  // Also check if any parent has data-terminal-container attribute
+  const terminalContainer = activeElement.closest("[data-terminal-container]");
+  if (terminalContainer) {
+    return true;
+  }
+
   // Check for autocomplete/typeahead dropdowns being open
   const autocompleteList = document.querySelector(
     '[data-testid="category-autocomplete-list"]'