#028 TextArea 1.0.37 WAIT/BLOCKED QA
Fix: S14 must not treat one ordinary line as WAIT/BLOCKED PASS. Now uses real #002 Joint delivery queue state, checks FIFO delivery, security block, and status-specific SVG line/marker.
Verify: WAIT 3 seconds -> queue=1 + spinner + unchanged connected line; target ready -> FIFO delivered; BLOCK dangerous input -> ban + connected line; delivered-count unchanged; Clear block -> READY.
User confirmation remains manual. #027 Frozen unchanged.
WAIT timer supersession and stale visual animation guards; verify WAIT -> BLOCK before timeout keeps BLOCKED state.
Initial browser QA boot is synchronized with DOMContentLoaded.