Detail view renders a signature block with a large monospace rotating code and
a thin SVG countdown ring that sweeps via CSS transition. The ticker polls
get_totp every second and is stopped on teardown (back/edit/trash/Escape/e/d/t).
Form has a two-button kind toggle (TOTP / Steam Guard) that re-renders in place
while preserving entered values. TOTP uses digits=6 kind='totp'; Steam uses
digits=5 kind='steam'. Both default to algorithm='sha1' period_seconds=30.
Keyboard shortcuts on detail: Escape=back, e=edit, d=trash, t=copy-code.
Guarded against stealing keystrokes from editable targets.
Wires totp.renderDetail / totp.renderForm into both dispatchers and calls
totp.teardown() alongside the other types so tickers can't leak across views.
Closes T8 of the extension 1C-β1 plan (5/5 typed-item modules in place;
only T9 picker and T10 acceptance remain).
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