build(deps): bump splitpanes from 3.1.8 to 4.0.0

Bumps [splitpanes](https://github.com/antoniandre/splitpanes) from 3.1.8 to 4.0.0.
- [Commits](antoniandre/splitpanes@v3.1.8...v4.0.0)

---
updated-dependencies:
- dependency-name: splitpanes
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

client/package.json

@@ -4,7 +4,7 @@
   "private": true,
   "dependencies": {
     "@tanstack/vue-query": "^5.66.0",
-    "splitpanes": "^3.1.8",
+    "splitpanes": "^4.0.0",
     "vue-json-pretty": "^2.4.0"
   }
 }