fix(homepage): video order by publish date and no hero/category duplicate

[kubo6472]

Summary

The public homepage hero (top_video) used a client-side sort that did not always match how videos were ordered in the API or placement logic, and it could show the same clip again in a category block when a pinned/legacy featured slot left the globally newest video in a category row.

Changes

• packages/shared/src/homepagePlacementSort.ts — Shared placementTimestampMs and compareVideosNewestFirst (prefer published_at, else upload_date, stable id tie-break) so the web app and Worker agree on recency.
• packages/api/src/homepagePlacement.ts — Uses the shared comparators instead of duplicating logic.
• packages/api/src/index.ts — /api/videos: order by the same publish-vs-upload rule in SQL; collapse duplicate rows from the category assignment LEFT JOIN (prefer a row with a category when merging); final list order uses compareVideosNewestFirst.
• packages/web/composables/useHomepageLayout.ts — Sort from deduped Map values with compareVideosNewestFirst; treat the hero id as reserved so it is omitted from featured_row sources and category visible/overflow lists.

Testing

• npx tsx --test ./test/homepage-placement.test.ts (pass)
• npm run typecheck in @vmp/api (pass)

Full npm test --workspace=@vmp/api still reports unrelated failures in pills and segment analytics suites (pre-existing in this environment).

  

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: c6fb3dd0-be0d-4c37-8aa8-2371d1ef7251

📥 Commits

Reviewing files that changed from the base of the PR and between 302167b and b5b1634.

📒 Files selected for processing (5)

• packages/api/src/homepagePlacement.ts
• packages/api/src/index.ts
• packages/shared/src/homepagePlacementSort.ts
• packages/shared/src/index.ts
• packages/web/composables/useHomepageLayout.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch cursor/fix-homepage-video-order-dedupe-4309

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