Center docs landing page

[chasehuh]

Summary

• let pages opt out of the docs sidebar through the existing Page hideSidebar prop
• hide the sidebar on the main docs landing page so its hero/cards/sections are centered in the viewport
• keep regular docs pages unchanged with the sidebar visible

Visual QA

Before: desktop homepage content center was x=870 on a 1440px viewport because it was centered in the content area after the 300px sidebar.
After: desktop homepage content/card grid center is x=720 on a 1440px viewport; mobile remains centered with no horizontal overflow.
Screenshots captured locally:

• /tmp/sume-docs-desktop-after.png
• /tmp/sume-docs-mobile-after.png
• /tmp/sume-docs-public-api-after.png

Validation

• pnpm install --frozen-lockfile
• pnpm exec prettier --write src/pages/_app.tsx src/pages/index.tsx
• pnpm exec prettier --check src/pages/_app.tsx src/pages/index.tsx
• pnpm tsc
• pnpm build
• git diff --check
• local route smoke on http://localhost:3013: /, /public-api, /api/cookbook, /api/reference => 200

Note: local commands emitted the existing Node engine warning because this machine is using Node v25.2.1 while package.json declares Node 20.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview, Comment	Jun 25, 2026 4:10am