refactor: replace snapshots with more flexible contains checks so that compiler output changes dont affect test outcome (#1122)

Author: dominikg

package.json

@@ -51,7 +51,7 @@
     "prettier": "^3.5.3",
     "prettier-plugin-svelte": "^3.4.0",
     "publint": "^0.3.12",
-    "svelte": "^5.32.1",
+    "svelte": "^5.33.2",
     "svelte-eslint-parser": "^1.2.0",
     "typescript": "^5.8.3",
     "typescript-eslint": "^8.32.1",