jabber.developer2
875f8f4100
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Cursor was set to oldest of read window, not oldest of returned batch — each page-up jumped past entire ranges (F16: 600/2000 msgs). Always bisect now; correct + simpler. Cost: +5-10 ms per page-up at 1M msgs, well below UI threshold. Also guard state->entries NULL when total_lines>0 && n_entries==0 (every line failed _ff_maybe_index_line). Backup would segfault. F16 tightened to received == total_msgs. Catches both stuck-on- entries[0] and cursor-jumping regressions.