Pre-select weight units

[rolandgeider]

At the moment the default weight unit for routines is "kg" and while it can be changed for each exercise, it would be nice if we could pre-select this depending on the user's preferred unit (weight_unit in the profile table). This needs to be done for web and flutter.

[franchsli]

Hello there, can I take this one?

[rolandgeider]

hey! Sure, go ahead!

There's already a useProfileQuery, that should have a flag for metric use. Most of the logic should be somewhere around src/components/WorkoutRoutines/widgets/DayDetails.tsx

[passionworkeer]

A robust approach is to treat the profile weight_unit as the default only at form initialization, not as a hard override. For web and Flutter, preload the unit selector from profile.weight_unit when creating a routine/exercise entry, but keep the existing per-exercise value if the item is being edited. That avoids clobbering historical data. I’d also cover 3 cases in tests: new routine uses profile default, editing preserves stored unit, and changing the profile only affects newly created entries.

[rolandgeider]

oh sure, this should only be the default for new entries!