…ions + business-facing entry pages

- Root sidebar split into four audience sections via separators (zero URL churn)
- getting-started split into Start Here / Cheatsheets; CLI and Validating
  Metadata moved to Deployment & Operations with redirects (incl. chain fix
  for the pre-2026-07 guides redirect) and in-content link rewrites
- New: getting-started/platform-capabilities (business-language capability
  tour, HotCRM as running example) and getting-started/build-without-code
  (Studio/Console/Setup visual-building guide)
- concepts/index gains Find Your Path reader cards; ui section renamed
  'Views & Apps' in nav and home cards

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

The cn language was declared in docs.site.json and mapped in middleware, but
lib/i18n.ts (what fumadocs actually consumes) only ever listed en and there is
zero cn content — a config-vs-runtime drift that made the site look bilingual.
Remove the declaration and the dead zh->cn Accept-Language mapping; keep the
i18n plumbing so a future language is content + one config line.

Verified: docs build passes; with Accept-Language: zh-CN, /docs serves the
English page with no /cn redirect.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Feedback pass on the audience-first IA: the sidebar still read as crowded.
- Drop the hardcoded Docs/Blog links above the tree (layout.shared.tsx)
- Strip per-item icons from all 14 section meta.json files (text-only tree)
- Merge the one-item Operate section: Learn / Build / Platform
- Take References and Releases (lookup content, 22 generated/log pages) out
  of the tree — URLs still resolve (verified 200) and the docs home page
  links both; getting-started no longer defaultOpen so the first screen
  shows all twelve top-level entries at once

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

'What Can It Do?' and 'Build Without Code' were buried inside the
Get Started folder — the exact audience they serve would never expand it.
Promote both to top-level Learn entries (/docs/platform-capabilities,
/docs/build-without-code; new-in-this-PR pages, so no redirects needed),
and lead the docs-home 'Start here' list with them.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

'What Can It Do?' grows from one page into a Learn-section folder of ten
business-language pages — data, views, forms & quality, automation,
approvals, permissions, analytics, AI, integrations & everyday work, and a
requirements one-pager template. Each page keeps three anchors: business
scenarios, an 'In HotCRM' pointer at the running example, and a
'For developers' cross-link into the technical Build docs. The index
becomes a card directory; new pages drop hand-written H1s (frontmatter
title renders them). URL /docs/platform-capabilities → /docs/capabilities
(page introduced in this PR, so no redirect debt).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

… src/flows)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

The page moved getting-started → deployment in this PR; its single
pre-existing occurrence (a table header) moves with it. Net change zero.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>