[Quality] Fix hypothesis description truncation on analysis pages done claude coding:7

In api.py analysis_detail, hypothesis descriptions are truncated to 200 chars with "...". This cuts off important scientific content. Fix: either show full description with expand/collapse, or increase to 500+ chars. The line is approximately: desc = h.get("description", "")[:200]. Also check showcase/walkthrough pages for the same truncation pattern.

Git Commits (16)

{
  "requirements": {
    "coding": 7
  }
}

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