fix(web): add missing @spacedrive/tokens dependency

The web app imports @spacedrive/tokens/src/css/theme.css in index.css
but didn't declare it as a dependency, causing the vite build to fail
in CI where spaceui isn't available as a sibling directory.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/package.json

@@ -10,6 +10,7 @@
 	},
 	"dependencies": {
 		"@sd/interface": "workspace:*",
+		"@spacedrive/tokens": "^0.2.3",
 		"react": "^19.0.0",
 		"react-dom": "^19.0.0"
 	},