docs: note layout routes require an Outlet element

[wasim-builds]

Fixes a documentation issue where layout routes did not explicitly mention the requirement of an <Outlet /> component to render child routes.

Summary by CodeRabbit

• Documentation
  • Added routing guidance for React and Solid explaining that layout routes require an <Outlet /> to render nested child routes.
  • Included examples of nested routes that depend on the outlet.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 55985309-87ef-4cf3-b403-8bb6c542a6fe

📥 Commits

Reviewing files that changed from the base of the PR and between 88f366a and 4657c03.

📒 Files selected for processing (2)

• docs/start/framework/react/guide/routing.md
• docs/start/framework/solid/guide/routing.md

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📝 Walkthrough

Walkthrough

The React and Solid routing guides now note that generated layout route components do not include <Outlet /> automatically. Developers must add it to layout routes such as posts.tsx to render index and parameterized child routes.

Changes

Layout route documentation

Layer / File(s)	Summary
Document explicit Outlet requirement docs/start/framework/{react,solid}/guide/routing.md	Adds notes explaining that layout routes require an explicit <Outlet /> to render child routes.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• TanStack/router#7852: Updates the React routing guide with the same layout-route <Outlet /> clarification.
• TanStack/router#7872: Addresses the same file-routing layout-route rendering issue.

Suggested labels: package: router-generator

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main documentation change about layout routes needing an Outlet.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[wasim-builds]

By the way, I've really been enjoying exploring the TanStack router codebase! My goal is to get more involved in open source to help maintain projects and learn from great engineering teams. Is there a process or pathway for becoming a member of the TanStack GitHub organization? I'd love to continue helping out where I can!