Fix menu component

[marcelines]

What changed

• Fixed the menu layering behavior by ensuring sticky section headers use the intended stacking order in src/components/menu.tsx (Disclosure.Trigger with z-10).
• Updated workspace formatter settings in .vscode/settings.json to enforce project-consistent save behavior:
  • Biome for javascript, javascriptreact, typescript, and typescriptreact
  • Prettier for astro
  • Biome fixes on save via source.fixAll.biome: "always"

Fix

• Resolves menu z-index/stacking issues during scroll so sticky menu headers render in the correct visual layer.
• Prevents formatting drift while touching menu code by ensuring TS/TSX files are formatted by Biome instead of accidentally falling back to Prettier.

Before

After

Why .vscode/settings.json changed

• The project intentionally uses Biome for JS/TS and Prettier for Astro, but formatter precedence can still be affected by user-level language-specific defaults.
• Adding explicit per-language formatter settings at workspace level ensures this repo’s styling rules are applied consistently for all contributors.
• Enabling Biome fix-on-save also applies lint-driven fixes (including class sorting where configured) as part of normal save flow.