BRO-020: mouse→content mapping status-row and past-EOF clicks NAVIGATE, clicks pierce the address bar, columns miscount wide/diff rows

Now
OPEN
Sev
MED

The pager's click pipeline (_mouse _screenToByte/_followRow, pager.js:813-927) maps screen cells to bytes with no viewport/mode guards and codepoint-not-column arithmetic. All VERIFIED headless (2026-07-07 audit) unless noted. Method Issues.

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