docs: minor docs improvements

[sajadtorkamani]

Summary by CodeRabbit

• Documentation
  • Rephrased the code-splitting example guidance to clarify the “split your route into two files” explanation.
  • Updated the “Route Trees” section to better explain converting the example into code-based routing.
  • Fixed grammar and punctuation in file-based routing, routing concepts, and navigation for improved readability.
  • Aligned routing guide cross-references and labels for consistency.
  • Refined automatic code-splitting and navigation warning text (wording and style only).

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📝 Walkthrough

Walkthrough

The PR updates router documentation wording, punctuation, and internal guide references across code-splitting and routing pages. No exported entities or routing behavior change.

Changes

Router documentation

Layer / File(s)	Summary
Code-splitting guidance docs/router/guide/code-splitting.md, docs/router/guide/automatic-code-splitting.md	Rephrases .lazy.tsx example guidance and corrects wording in the automatic code-splitting transformation explanation.
Routing terminology and prose consistency docs/router/routing/*.md, docs/router/guide/navigation.md	Updates guide references, navigation wording, type-safety wording, and punctuation in routing explanations.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Possibly related PRs

• TanStack/router#7840: Documentation-only wording and formatting updates in the TanStack Router documentation.

Suggested labels: documentation

Suggested reviewers: 0x80

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title is related to the docs-only change, but it is too vague to convey the main updates.	Use a more specific title that mentions the router documentation wording and cross-reference fixes.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
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

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@docs/router/guide/automatic-code-splitting.md`:
- Line 79: Update the sentence describing automatic code splitting to use “in
place” instead of the hyphenated “in-place” wording, leaving the rest of the
sentence unchanged.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 9e91f806-d5ff-4207-80ac-cf95adce6454

📥 Commits

Reviewing files that changed from the base of the PR and between cf45153 and 226c599.

📒 Files selected for processing (2)

• docs/router/guide/automatic-code-splitting.md
• docs/router/guide/navigation.md

🚧 Files skipped from review as they are similar to previous changes (1)

• docs/router/guide/navigation.md