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/package.json

@@ -42,6 +42,9 @@
     "@radix-ui/react-tabs": "^1.1.13",
     "@radix-ui/react-tooltip": "^1.2.8",
     "@tanstack/react-query": "^5.90.12",
+    "@xterm/addon-fit": "^0.10.0",
+    "@xterm/addon-webgl": "^0.18.0",
+    "@xterm/xterm": "^5.5.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
@@ -52,6 +55,7 @@
     "react": "19.2.0",
     "react-dom": "19.2.0",
     "react-markdown": "^10.1.0",
+    "react-resizable-panels": "^3.0.6",
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.4.0",
     "zustand": "^5.0.9"