feat(posts): add EP72 YoooClaw episode

[AnnatarHe]

Summary

• add EP72 “YoooClaw：给 AI 一具身体” with its YouTube metadata and shownotes
• support episodes that only have a YouTube link
• hide Xiaoyuzhou playback controls when no Xiaoyuzhou link is available

Impact

EP72 now renders its YouTube player without placeholder links for unavailable platforms. Existing episodes with both YouTube and Bilibili retain their two-column video layout.

Verification

• pnpm astro check
• pnpm build
• verified the generated EP72 HTML, RSS entry, and Open Graph image
• verified EP71 still renders Xiaoyuzhou, YouTube, and Bilibili output

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Prevent the future-dated episode from publishing early

When this commit is deployed before 2026-07-31 14:00, EP72 is exposed immediately despite this future publication time: src/pages/posts.astro lists every collection entry, src/pages/rss.xml.ts emits every entry, and the static post route is generated without a date filter. Consequently the episode becomes the first posts/RSS item before its stated release time; defer publishing it or filter future-dated entries until release.

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