fix(core): log message include json file path in auto-nav-sidebar errors

[SoonIter]

Summary

• include the offending _nav.json or _meta.json path in auto-nav-sidebar JSON parse errors
• centralize the error message in readJson() so both nav and sidebar paths are covered
• add a regression test for invalid _meta.json parsing and a patch changeset for @rspress/core

Related Issue

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

Verification

• pnpm exec biome check packages/core/src/node/auto-nav-sidebar/utils.ts packages/core/src/node/auto-nav-sidebar/walk.ts packages/core/src/node/auto-nav-sidebar/walk.test.ts
• pnpm --filter @rspress/shared build
• pnpm exec rstest run packages/core/src/node/auto-nav-sidebar/walk.test.ts

[Copilot]

Pull request overview

Improves @rspress/core auto-nav-sidebar error reporting by including the exact _nav.json / _meta.json file path when JSON parsing fails, and adds a regression test to ensure this context remains present.

Changes:

• Centralized JSON parse error wrapping inside auto-nav-sidebar/readJson() to include the source file path in failures.
• Simplified nav scanning by relying on the centralized readJson() error behavior.
• Added a regression test for invalid _meta.json parsing and a patch changeset for @rspress/core.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
packages/core/src/node/auto-nav-sidebar/walk.ts	Removes local JSON-parse error wrapping in favor of centralized readJson() behavior.
packages/core/src/node/auto-nav-sidebar/utils.ts	Enhances readJson() to throw a contextual error containing the JSON file path on parse failure.
packages/core/src/node/auto-nav-sidebar/walk.test.ts	Adds regression coverage asserting the thrown error includes the invalid JSON file path.
.changeset/fair-pets-grab.md	Publishes the improvement as a patch for @rspress/core.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.