10f92fc9ecb71c1bbd79c98997d79ca826d369e0  [list-marker] Position every outside list marker after layout, not just the ones whose first formatted line is in a descendant block

Classified as not security-relevant.
Triage note: Reworks excluded list-marker placement, intrinsic widths, hit testing and empty-inline handling (firstContentfulChild, hasLineIfEmpty, removal of ShouldCollapseAnonymousBlockParent). Layout correctness/refactor, no memory-safety bug.
This commit was flagged by the signal scorer and reviewed by AI (not a human). It is listed only so the triage is auditable; there is no root-cause analysis because this is not a vulnerability fix.

Structural signals: smartptr_member_added (+6.47), null_guard (+1.2), area:Source/WebCore/layout (+2.0), large_churn (-2.0)