Move the variation to a field in the exercise

[rolandgeider]

Proposed Changes

Implement changes from the backend and move the variation to a field in the exercise.

[Copilot]

Pull request overview

Updates the app to match backend changes by replacing the old numeric exercise “variation” identifier with a new variation_group field stored directly on Exercise (UUID string), and propagates this through providers, widgets, and test fixtures/mocks.

Changes:

• Replace variationId/variations (int) with variationGroup/variation_group (String UUID) across exercise models, providers, and widgets.
• Update add-exercise flow to set/send variation_group and remove the now-unused Variation model/converter.
• Regenerate/adjust mocks, fixtures, and tests to align with updated provider/model APIs.

Reviewed changes

Copilot reviewed 33 out of 33 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
test/widgets/routines/gym_mode/log_page_test.mocks.dart	Updates mocked ExercisesProvider APIs/types to use variation group strings.
test/routine/routines_provider_test.mocks.dart	Updates mocked ExercisesProvider APIs/types to use variation group strings.
test/routine/gym_mode/gym_mode_test.mocks.dart	Updates mocked ExercisesProvider APIs/types to use variation group strings.
test/routine/gym_mode/gym_mode_test.dart	Updates test stubs to call findExercisesByVariationGroup.
test/nutrition/nutritional_plans_screen_test.mocks.dart	Updates AuthProvider mock with new serverUpdateRequired API.
test/nutrition/nutritional_plan_screen_test.mocks.dart	Updates AuthProvider mock with new serverUpdateRequired API.
test/fixtures/exercises/exerciseinfo_response.json	Replaces variations with variation_group in fixture payload.
test/exercises/model_exercise_test.dart	Updates assertions to check variationGroup instead of variationId.
test/exercises/exercises_detail_widget_test.mocks.dart	Updates mocked ExercisesProvider APIs/types to use variation group strings.
test/exercises/exercises_detail_widget_test.dart	Updates test stubs to call findExercisesByVariationGroup.
test/exercises/contribute_exercise_test.mocks.dart	Regenerates mocks to remove Variation usage and switch to variationGroup.
test/exercises/contribute_exercise_test.dart	Updates stubs to use variationGroup getter.
test/exercises/contribute_exercise_image_test.mocks.dart	Regenerates mocks to remove Variation usage and switch to variationGroup.
test/core/validators_test.mocks.dart	Updates AppLocalizations mock with newly added localization keys.
test/core/settings_test.mocks.dart	Updates mocked ExercisesProvider APIs/types to use variation group strings.
lib/widgets/exercises/exercises.dart	Uses variationGroup and findExercisesByVariationGroup to render variations.
lib/widgets/add_exercise/steps/step_6_overview.dart	Displays selected variation group/connection in the overview step.
lib/widgets/add_exercise/steps/step_2_variations.dart	Switches selection logic from variationId to variationGroup.
lib/providers/nutrition_ingredient_filters_riverpod.g.dart	Regenerated Riverpod code (hash change).
lib/providers/exercises.dart	Changes variation grouping/indexing to be keyed by variationGroup (String).
lib/providers/add_exercise.dart	Replaces variationId with variationGroup and sends it in submission payload.
lib/models/exercises/variation.g.dart	Removes generated JSON serializer for deprecated Variation model.
lib/models/exercises/variation.dart	Removes deprecated Variation model.
lib/models/exercises/exercise.g.dart	Updates JSON (de)serialization to read/write variation_group.
lib/models/exercises/exercise.dart	Renames/retargets exercise field to variationGroup mapped to variation_group.
lib/models/exercises/exercise_submission.g.dart	Updates submission JSON (de)serialization to use variation_group.
lib/models/exercises/exercise_submission.freezed.dart	Regenerates Freezed code for renamed submission field (variationGroup).
lib/models/exercises/exercise_submission.dart	Updates Freezed model to expose variationGroup JSON key.
lib/models/exercises/exercise_api.g.dart	Updates exercise API DTO JSON mapping to variation_group.
lib/models/exercises/exercise_api.freezed.dart	Regenerates Freezed code for renamed API DTO field (variationGroup).
lib/models/exercises/exercise_api.dart	Updates API DTO to use variationGroup mapped to variation_group.
lib/database/exercises/type_converters.dart	Removes unused VariationConverter import and implementation.
lib/database/exercises/exercise_database.dart	Bumps Drift schema version to clear cached exercise JSON after response shape change.

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