fix: use current location for canonical URL during SSR

[tannerlinsley]

The canonical path selector read from state.resolvedLocation, which
represents the previously resolved location and is undefined on the
initial SSR render. That made every server-rendered page fall back to
/, so blog posts (and every other route) emitted
<link rel="canonical" href="https://tanstack.com/">. Mobile share
sheets that honor the canonical then shared the root URL instead of the
actual post.

Switch to state.location, which is always populated with the current
requested location.

https://claude.ai/code/session_01UdssKwjy5SkB6gbB9y6XZS

Summary by CodeRabbit

• Bug Fixes
  • Fixed canonical URL and search indexing metadata calculation to use the correct routing source for accurate page identification and indexing directives.

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[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: e076c70f-932c-43e4-b12b-bd864be60188

📥 Commits

Reviewing files that changed from the base of the PR and between 4d6e400 and 095a87d.

📒 Files selected for processing (1)

• src/routes/__root.tsx

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📝 Walkthrough

Walkthrough

The canonicalPath computation in ShellComponent now sources from s.location?.pathname instead of s.resolvedLocation?.pathname to determine canonical URLs and search engine metadata, while maintaining the same fallback behavior.

Changes

Cohort / File(s)	Summary
Router location source update src/routes/__root.tsx	Changed canonicalPath to read from location?.pathname instead of resolvedLocation?.pathname for canonical URL and indexing metadata computation.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 A hop through the location state so fine,
From resolved to active, the path realigns,
Canonical whispers flow true and free,
The router's heartbeat now beats perfectly! ✨

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/investigate-issue-6DwXU

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