Update KubeCon Japan event metadata and add talk slides

[fishman]

• fix(events): correct OG image fallback and add KubeCon Japan talk slides
• fix(EventLanding): set og:image from event banner via Head, use siteConfig.url

What type of PR is this?

/kind feature

What this PR does / why we need it:

fix eventlanding metadata(for linking, etc) and add KubeCon Japan talk slides

Summary by CodeRabbit

• New Features
  • Added Talk Slides resources for the KubeCon Japan event, including English/Chinese labels and a PDF link.
  • Improved social sharing previews by generating event-specific Open Graph and Twitter image metadata when a banner image is available.
• Bug Fixes
  • Ensured shared and Schema.org image URLs use the site’s configured base URL for correct absolute links.

[hami-robot]

@fishman: The label(s) kind/feature cannot be applied, because the repository doesn't have them.

Details

In response to this:

• fix(events): correct OG image fallback and add KubeCon Japan talk slides
• fix(EventLanding): set og:image from event banner via Head, use siteConfig.url

What type of PR is this?

/kind feature

What this PR does / why we need it:

fix eventlanding metadata(for linking, etc) and add KubeCon Japan talk slides

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[coderabbitai]

📝 Walkthrough

Walkthrough

Event landing pages now derive event image metadata from Docusaurus configuration and conditionally emit Open Graph and Twitter image tags. The kubecon-japan event also gains localized talk slides resource data.

Changes

Event updates

Layer / File(s)	Summary
Event image metadata src/components/EventLanding.js	Uses siteConfig.url for Schema.org image URLs and conditionally adds Open Graph and Twitter image tags when a banner URL exists.
KubeCon Japan talk slides src/data/events.js	Adds localized talkSlides labels and a PDF URL to the kubecon-japan event resources.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• Project-HAMi/website#642: Established the related EventLanding and kubecon-japan event implementations.
• Project-HAMi/website#649: Related EventLanding Schema.org image handling.
• Project-HAMi/website#657: Related kubecon-japan event resource updates.

Suggested labels: enhancement

Suggested reviewers: wawa0210, mesutoezdil

Poem

I’m a rabbit with slides in my pack,
Bright event images hop on track.
With labels in two tongues,
Metadata sings,
And banners never look back.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main changes: KubeCon Japan metadata updates and a new talk slides resource.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[mesutoezdil]

/lgtm

[hami-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: fishman, mesutoezdil
Once this PR has been reviewed and has the lgtm label, please assign archlitchi for approval. For more information see the Kubernetes Code Review Process.

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