feat(reco): time-windowed taste embedding + stronger semantic signal - #79
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Replace fixed last-5 `lastMediaIds` with a 7-day event window query against `user_events` (configurable via TASTE_WINDOW_DAYS). Expands taste sample up to 40 items with timestamps rather than a stale profile snapshot. Increase semantic signal multiplier from 10 → 18, making it competitive with genre signals for users with high cosine similarity (max ~14.4 pts at cinephile=1 vs ~9 pts before). https://claude.ai/code/session_01XcJo4UywxcJC2XmiRSy1Wm
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Summary
lastMediaIds(max 5 IDs, no timestamps) with a live query againstuser_events— all distinctmedia_idvalues the user interacted with in the last 7 days. The window is controlled byTASTE_WINDOW_DAYS = 7(easy to tune later). Taste sample expands from ~10 to up to 40 items.ratedRows(rating = 1) are still included alongside the event window, so explicit likes always anchor the taste vector regardless of age.10→18(sim × 18 × (0.5 + 0.5 × cinephile)), giving a max of ~14.4 pts at cinephile=1 — now competitive with genre signals rather than just a tiebreaker.Test plan
youMightAlsoLikefor a user who has watched films in the last 7 days → confirm semantic similarity badge appears more oftenrecentIds→ only liked films used, graceful fallback)TASTE_WINDOW_DAYScan be changed without other code changeshttps://claude.ai/code/session_01XcJo4UywxcJC2XmiRSy1Wm
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