[prithvimk]

Lands Phase D3 (F08, F09) from the design pass. All four D3 items are ticked in docs/IMPLEMENTATION_PLAN.md.

Workout tab (F09)

• Up next card: suggests the routine done least recently, with a "Start Pull Day" button. Routines never done come first, then list order. Routines with no exercises are never suggested. The suggested routine leaves the list below.
• Routine rows: each row reads "5 exercises · last done Friday · about 1 h 4 min".
  • "Last done" says today, yesterday, a weekday within the week, or a date.
  • The typical duration is the average of past sessions and is hidden until there is one.
  • Lines wrap only between parts.
• Row actions: a play button starts the routine. The ⋮ menu has Edit and Delete, and Delete asks first. Tapping the row still opens the editor.
• Other changes: "Start an empty workout" is a text button. The tab gets a "Workout" title like History and Exercises.

Finish summary (F08)

• Full screen: replaces the dialog and takes the Workout tab's place until Done or Back.
  • Content: the day and routine name, tiles for duration, volume and sets, the gold records card with its pop-in, and the note when the app ended an idle workout.
  • Buttons: Done is the main one and Save as routine sits under it. Resume workout is at the top, away from Done.
• Compared with last [routine]: shows the volume change and each exercise's top set, against the routine's last finished session that had a set ticked.
  • A top set is the heaviest ticked set that isn't a warm-up; ties go to more reps.
  • An arrow shows only when weight and reps moved the same way.
  • Hidden for empty workouts and for a routine's first session.

Data

• No schema change. RoutineDao.observeStats() provides last done and average duration. WorkoutDao.getPreviousRoutineWorkoutId() and WorkoutRepository.compareWithPrevious() power the comparison.
• The logic lives in testable pure functions: domain/SessionComparison.kt, domain/UpNext.kt and ui/format/RelativeDay.kt.

Also

• CLAUDE.md: open a pull request as soon as an item is done.

Checks

./gradlew testDebugUnitTest ktlintCheck lintDebug assembleDebug passes. It includes new tests for the comparison, the Up next pick, relative days, percent formatting, and the routine stats and previous-session queries.

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