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PostsFilterBar didn't wrap and its artist/platform fields had inline min-widths (240/180px) a media query can't override → horizontal overflow on phones. Moved widths to classes, added flex-wrap, and <600px each field takes a full-width row. SubscriptionsTab's status/search inline max-widths likewise moved to classes; <600px they go full-width and the v-spacer is dropped so the search isn't shoved around. Verified as already-fine (sweep false positives, no change): PostCard (default body is a stacked column; only goes row at container >=800px), SeriesReaderView (already has a <=768px block: nav drawer 150px, quick-nav stacks). The subscriptions v-data-table scrolls horizontally within its own wrapper, so it doesn't widen the page — a true mobile card layout is a larger follow-up if wanted. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>