chore(todo): close a fixed lock-chain bug, re-scope the world face, file twoHEADmain

The idle-commit lock-chain bug was fixed on 2026-07-29 and stayed open at [#A]
six days past deadline. Verified against the tree rather than the commit
message: the wrapper is in the rendered chain, the live config matches, and the
test that used to pin the bug now pins the fix. The evidence the task itself
named is that the relaunch log is receiving entries, so the instrument is
present rather than silently removed.

Recorded a finding that changes the night-watch task's premise. Two relaunches
on 2026-07-30 postdate the mitigation, and the watchdog logs the exit code but
not the sender, so "the night watch is the only thing killing hyprlock" is now
unproven. Instrument before designing the handshake.

The world face lost half its premise when the 07-31 rebuild dropped the layout
flag, so it re-scopes to the hour-format toggle alone and drops to [#C]. Filed
the decaying spine tests and answered the drift audit's open delivery question,
which is what let it take :solo:.

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