- admin/partials/dashboard.php lines 108-109: cast $article->total_clicks
and $article->total_unique to (int) before number_format(). Both are
SUM() aggregate columns from $wpdb->get_results() returned as strings;
same PHP 8.3 TypeError vector as the articles-list fix.
- tests/unit/DashboardTopArticlesCastTest.php: two unit tests mirroring
the ArticlesListTotalCastTest pattern (numeric string + null cases).
- CHANGELOG [2.5.1]: fix (# 31) typo -> (#32); add dashboard fix entry.
- $topic['total_clicks'] at line 137 is safe (already cast to int in
Peptide_News_Analytics_Reports::get_popular_topics() at assignment).
- $total_clicks/$total_unique at lines 48/52 are safe (array_sum coerces).
Agent-Session: engineer-infra-dashboard-cast-fix-20260617
number_format() in PHP 8.3 strictly requires int|float; $wpdb->get_var()
returns string|null. Cast $total to (int) at point of assignment in
admin/partials/articles-list.php to fix HTTP 500 on Articles admin page.
Also add PHPUnit test covering the string->int cast contract.
Fixes#31. Version bump 2.5.0 -> 2.5.1.
Agent-Session: fix-articles-500-20260617
