{"page":"detail 3-pane (scenario 28, 1400x900)","injected":"200-char URL / 160 CJK / 300-char code / long taskline title","widths":{"center":[240,912],"seamX":912,"right":[912,1400]},"urlRow":{"paraRight":933,"overSeamBy":21,"chatScrollWidth":693,"chatClientWidth":672},"paints":{"x900":"chat-para p","x910":"chat-para p","x914":"doc-files div","x952":"doc-files div"},"isolation":{"baseline_sw_eq_cw":true,"onlyUrlOverflows":true,"cjk_ok":true,"code_ok":true,"taskline_ok":true,"toolout_ok":true,"streaming_ok":true,"preview_ok":true},"viewport1200":{"chatSW_eq_CW":true},"viewport1920":{"chatSW_eq_CW":true},"rootCause":".chat-text is a flex item with min-width:auto; overflow-wrap:break-word does not shrink intrinsic min-content (only anywhere does); unbreakable latin run forces row wider than column; chat-col (overflow-y:auto -> overflow-x:auto) clips at seam + h-scrolls","sameTrap":[".chat-bubble",".chat-taskline-title"],"proposedFix":".chat-text, .chat-bubble, .chat-taskline-title add min-width: 0"}