[workouts] Add workouts app with exercise catalog and workout routines (ca613753)

PROJECT.org

@@ -698,6 +698,30 @@ The Edit log form should have from top to bottom:
 *** Description
 
 ** TODO [#A] Add trends tests for concurrent trends :trends:tests:concurrent:
+** TODO [#B] Add workouts app with exercise catalog and workout routines :workouts:feature:
+:PROPERTIES:
+:ID:       ca613753-d203-4429-b062-36e3312bca82
+:END:
+
+*** Description
+
+Add a `workouts` Django app so we can scrobble gym sessions.
+
+- New `Exercise` model with the wrkout/exercises.json catalog, imported via
+  `python manage.py import_wrkout_exercises`. Image files come from inside the
+  tarball and are stored via ImageKit specs.
+- New `WorkoutRoutine` model (ScrobblableMixin, media_type_label "Workout"),
+  scrobbled through the existing Scrobble system with a `workout_routine` FK and
+  `WorkoutLogData` storing sets/reps/weight per exercise plus duration, bodyweight
+  and RPE.
+- Weights are stored canonically in kg; the profile's `weigh_in_units` setting
+  drives form input and display units. A generic
+  `apply_media_unit_conversions` helper in scrobbles/utils.py should handle both
+  drinks (`size_ml`) and workout weights, fixing the old GET-only drinks
+  conversion so imperial POSTs store kg.
+- Templates, admin, DRF viewsets (`exercises`, `workout-routines`), MCP tools,
+  and `tests/workouts_tests/` (unit conversion, form round-trips, importer,
+  imperial POST) included.
 * Version 64.5 [1/1]
 ** DONE [#B] Clean up issues with org-mode notes :orgmode:notes:scrobbles:
 :PROPERTIES: