Clean up legacy instance shell and theme additions

packages/ui/package.json

@@ -14,6 +14,9 @@
     "@kobalte/core": "0.13.11",
     "@opencode-ai/sdk": "^1.0.138",
     "@solidjs/router": "^0.13.0",
+    "@suid/icons-material": "^0.9.0",
+    "@suid/material": "^0.19.0",
+    "@suid/system": "^0.14.0",
     "debug": "^4.4.3",
     "github-markdown-css": "^5.8.1",
     "lucide-solid": "^0.300.0",