feat(docs): migrate loopover-ui docs pages to fumadocs-mdx content pipeline

[oktofeesh1]

Summary

• Migrates every remaining hand-authored docs.<slug>.tsx route page in loopover-ui (plus self-hosting-unified-ams-orb, added upstream mid-migration) onto the fumadocs-mdx content pipeline the Spike: prototype fumadocs-mdx + Scalar docs pipeline on TanStack Start #6037 spike proved out: content now lives in content/docs/*.mdx, and each route is a thin loader + docsClientLoader wrapper around the existing DocsPage/Callout/CodeBlock/FeatureRow ui-kit primitives.
• Page prose, code samples, and callouts are preserved from the prior route files — verified with a byte-for-byte comparison of every extracted code block against the pre-migration .tsx source.
• scripts/check-docs-drift.mjs and every docs-* drift-guard test now point at the migrated content/docs/*.mdx paths instead of the old route files.
• Synced against main after this branch was opened (50 upstream commits landed in the interim); reconciled the 5 docs pages upstream had also touched in that window (the LOOPOVER_REVIEW_UNIFIED_COMMENT flag retirement and the how-reviews-work comment restructuring) by porting the upstream prose edits into the corresponding .mdx files.

Scope

• The PR title follows type(scope): short summary Conventional Commit format.
• This PR is focused: content-pipeline migration under apps/loopover-ui/** only, no unrelated backend/MCP/deploy changes.
• This follows CONTRIBUTING.md and does not reintroduce GitHub Pages, VitePress, site/, or CNAME.
• Closes Spike: prototype fumadocs-mdx + Scalar docs pipeline on TanStack Start #6037

Validation

• git diff --check
• npm run actionlint
• npm run typecheck
• npm run test:coverage locally — UI-only change under apps/loopover-ui/**, outside coverage.include, so codecov/patch does not apply
• npm run test:workers
• npm run build:mcp
• npm run test:mcp-pack
• npm run ui:openapi:check
• npm run ui:lint
• npm run ui:typecheck
• npm run ui:build
• npm audit --audit-level=moderate
• Full npm run test:ci run locally, green (891 test files / 17,127 tests passed)

Safety

• No secrets, wallet details, hotkeys, coldkeys, user PATs, private keys, raw trust scores, private rankings, or private maintainer evidence are exposed.
• Public GitHub text stays sanitized, low-noise, and does not imply compensation guarantees or optimization tactics.
• Auth, cookie, CORS, GitHub App, Cloudflare, or session changes include negative-path tests. — N/A, no such changes in this PR
• API/OpenAPI/MCP behavior is updated and tested where needed. — N/A, no API/OpenAPI/MCP behavior changed
• UI changes use live API data or real empty/error/loading states, not production mock/demo fallbacks. — N/A, static docs content only
• Public docs/changelogs are updated where needed; changelogs are only edited for release-prep PRs.

Notes

• Rendered output is intended to be pixel-identical to the prior hand-authored pages — this is a content-pipeline/authoring-format change, not a visual redesign, so no UI Evidence screenshots are included.
• Orama search and the @scalar/api-reference playground (also named in Spike: prototype fumadocs-mdx + Scalar docs pipeline on TanStack Start #6037's deliverables) are out of scope for this PR; Spike: prototype fumadocs-mdx + Scalar docs pipeline on TanStack Start #6037's Vite integration and one-page proof are the parts this PR builds on.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.35%. Comparing base (2af2da3) to head (5003fab).
⚠️ Report is 11 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6271   +/-   ##
=======================================
  Coverage   95.35%   95.35%           
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  Files         598      598           
  Lines       47102    47102           
  Branches    14988    14988           
=======================================
  Hits        44913    44913           
  Misses       1464     1464           
  Partials      725      725           

Flag	Coverage Δ
shard-1	44.02% <ø> (ø)
shard-2	36.66% <ø> (ø)
shard-3	32.23% <ø> (ø)
shard-4	34.41% <ø> (ø)
shard-5	31.61% <ø> (ø)
shard-6	45.17% <ø> (ø)

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