fix: add missing native binaries for WSL development

The monorepo restructure caused npm to skip installing platform-specific
optional dependencies for tailwindcss and lightningcss. This adds explicit
dependencies for the Linux x64 binaries and removes the duplicate lockfile.

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

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

apps/app/package.json

@@ -43,11 +43,13 @@
     "@radix-ui/react-slot": "^1.2.4",
     "@radix-ui/react-tabs": "^1.1.13",
     "@radix-ui/react-tooltip": "^1.2.8",
+    "@tailwindcss/oxide-linux-x64-gnu": "^4.1.17",
     "@tanstack/react-query": "^5.90.12",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
     "dotenv": "^17.2.3",
+    "lightningcss-linux-x64-gnu": "^1.30.2",
     "lucide-react": "^0.556.0",
     "next": "16.0.7",
     "react": "19.2.0",