fix(security): keep the estimated severity inside the open leads column - #2465

🟢 Confidence 10/10 · safe to merge. Pure markup change inside one row; the predicate guard and both call sites line up, and recent UI-only remaps of this file shipped without test edits.
_{no findings · tests not needed · risk low}

The Open leads row now renders only the estimated severity in its fixed 64px column and moves the "Unverified" mark to a trailing chip, matching the findings list. Contained view change, safe to merge.

• estimatedSeverityBadge renders the estimate alone in the dashed outline badge
• findingItem ends with unverifiedChip for unverified leads and its title column grows

_{869cc4f · Reply "won't fix" to dismiss a finding, or mention @maple-review-bot to ask about one.}