docs: center all media assets in README

[Miyamura80]

Summary

Centers all media assets in README.md for a cleaner, more polished landing page.

Changes:

• Header screenshot — wrapped in <div align="center">
• 🎥 Explanation Video link — converted to an <a> inside <p align="center">
• Architecture SVG — wrapped in <div align="center">
• OSWorld Leaderboard badge — converted from markdown to a centered <a><img></a> inside <p align="center">

Filename references inside code blocks (recording.mp4, step_001.png, etc.) were intentionally left untouched since they are not embedded media.

🤖 Generated with Claude Code

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Generated by Claude Code

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Summary by cubic

Centered all media assets in the README to create a cleaner, more balanced landing page. Wrapped the header screenshot and architecture SVG in

and converted the explanation video link and OSWorld leaderboard badge to centered HTML.

^{Written for commit 410d48d. Summary will update on new commits.}

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[cubic-dev-ai]

No issues found across 1 file

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

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