Module time 

Intervals and durations, shared by market summary --every and watchlists, so both read 30s the same way and have the same defaults (#47, Q7).

Constants

DEFAULT_DURATION_SECS

Default total duration of a repeat (1 hour).

DEFAULT_INTERVAL_SECS

Default interval between runs (60 seconds).

UNTIL_CANCELLED

Duration words that mean “until the user stops it” (#96).

Functions

format_duration

The shortest text that parse_duration reads back as secs.

is_until_cancelled

forever or inf, in any case.

parse_duration

Parses 30s, 5m, 1h, 2d or a bare number of seconds into whole seconds. Zero and negative values are errors.