Final domain: move the operator question queue (questionRowCache, the
sync/apply/filter/fingerprint/buildQuestionLi/renderQuestions fns, formatTtl,
and the .q-ttl countdown ticker) from tabs.js into call.js. tabs.js imports
syncQuestionsFromSnapshot, applyQuestionAdded, applyQuestionResolved,
renderQuestions, and the activeQuestionCount getter; refreshTabCounts now
sums activeApprovalCount()+activeQuestionCount()+operatorInboxCount().
The .status-age (SW4RM) and .approval-ts/.reminder-due/.sched-due
(approvals+schedules) tickers stay in tabs.js — only the questions-specific
.q-ttl ticker moved. questionsState stays in state.js (shared with the SW4RM
badges). Behaviour-preserving; no visual change.
Net: tabs.js 2323 to 1603 lines; the Y3R C4LL pane now lives in call.js,
alongside permissions.js / schedules.js as a per-domain module.
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