front: stdcm: times and durations (rounded?) leads to inconsistent display of stop times in summary

[bougue-pe]

What happened?

In STDCM, it's possible to obtain inconsistent time/duration values : arrival at stop is 9:13, departure from stop 9:19 and duration is 7 min.

What did you expect to happen?

I expected the 3 values to be consistent.

Probably:

• on one hand decide if/how to round arrival/departure times (relates to Departure and arrival times are rounded down in the train list #9179 too?):
  • precise to the second (no rounding)
  • closest
  • floor
  • ... ceiling looks weird IMO
• on the other hand compute stop duration to have a consistent display:
  • precise to the second (no rounding)
  • use the rounded arrival/departure time values for a duration rounded to the minute

We may as well assume to have inconsistent values (if all is rounded to the closest, it can happen), and maybe just precise exact values at hover?
Example (did not check exact values in provided case): arrival 9:12:35, departure 9:19:25 ⇾ duration 6:50

How can we reproduce it (as minimally and precisely as possible)?

On STDCM, when playing the test by hand, at the step 24 an inconsistent display of times/durations was obtained, probably caused by rounding.

On which environments the bug occurs?

Recette (SNCF), Production (SNCF)

On which browser the bug occurs?

Firefox

OSRD version (top right corner Account button > Informations)

v0.3.10 c9066aa