v0.105.8

What's Changed

• fe-fix(frontend): fix session-mounts-store test call sites by @ardaerzin in #5432
• [fix] Show short agent-run errors in full instead of clamping them away by @ashrafchowdury in #5395
• [fix] Sandbox draft issue for new agents by @ashrafchowdury in #5408
• fix(frontend): drive loading skeletons, non-blocking resolve, retry by @ardaerzin in #5430
• [perf] Paint the playground from disk on reload; cut boot render + request cost by @ardaerzin in #5433
• [feat] Ambient context-usage meter sourced from the model catalog by @ashrafchowdury in #5434
• feat(frontend): context token-budget indicator in agent composer by @ardaerzin in #5402
• [release] v0.105.8 by @github-actions[bot] in #5431

Full Changelog: v0.105.7...v0.105.8